TY - JOUR
AU - Benamrane, Mohammed
AU - Németh, Károly
AU - Jadid, Mohamed
AU - Santos, José Francisco
AU - Mendes, Maria Helena
AU - Talbi, El Hassan
AU - Portela, Luís
TI - Complex monogenetic volcano in karst setting: Lechmine N'kettane volcano (Middle Atlas, Morocco)
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 438
PY - 2023
PG - 21
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2023.107825
UR - https://m2.mtmt.hu/api/publication/33845010
ID - 33845010
AB - The Lechmine N'kettane is a Quaternary volcano, located within the Middle Atlas Volcanic Field (MAVF) in central Morocco. It is built on the faulted contact between Liassic limestone and Plio-Quaternary fluvio-lacustrine deposits. In map-view it consists of an elliptical maar crater, surrounded by a tephra ring, within which a scoria cone is nested in its northern crater zone. The Lechmine N'Kettane volcano is monogenetic in the sense of its small eruptive product volume and lack of evidence of significant time breakthrough it grows. The volcano formed from an eruptive locus that migrated laterally and vertically within the short duration of the eruption in a zigzagging pattern, along a complex set of generally NE-SW and NW-SE-trending faults. It represents a perfect example of how a volcano form and evolve under the influence of a combination of specific factors such as the lithological characteristics of the substrate, its hydrogeological parameters, magma flux and the local structural framework of the country rocks. The petrographic, granulometric and morphological (including terrain modelling) analyses of the Lechmine N'kettane pyroclastic deposits show that it was constructed in four eruptive phases with variable eruptive styles. The first, relatively dry, phreatomagmatic phase, that took place on a NE-SW fault in the northeastern part of the crater, was generated by the interaction between the ascending basaltic magma with meteoric water in the karst aquifer hosted by the Liassic limestone. The second phase is represented by a magmatic scoria fallout deposit whose explosion locus moved westward, along the same NE-SW fault. During the third phase, the explosion center migrated southward, along a NNW-SSE fault, and produced the last phreatomagmatic event by interaction of magma and water-saturated Plio-Quaternary sediment. The fourth eruptive phase is a purely scoria event, corresponding to the construction of the nephelinitic scoria cone in the northwestern part of the tephra ring. Between eruptive products formed in respective eruptive phases no evidence was recognized to establish significant time gaps between their formation.
LA - English
DB - MTMT
ER -
TY - THES
AU - Catherine, Brown
TI - VOLCANOLOGY OF THE COALSTOUN LAKES VOLCANIC FIELD, SOUTHEAST QUEENSLAND, AUSTRALIA. Master of Philosophy (Science), School of Earth and Atmospheric Sciences, Faculty of Science, Queensland University of Technology, Australia
TS - Master of Philosophy (Science), School of Earth and Atmospheric Sciences, Faculty of Science, Queensland University of Technology, Australia
PY - 2023
SP - 200
UR - https://m2.mtmt.hu/api/publication/33814609
ID - 33814609
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Wilson, Laura J. E.
AU - Giacalone, E.
AU - Scott, James M.
AU - Brenna, Marco
AU - White, James D. L.
AU - le, Roux Petrus J.
AU - Hemming, Sidney R.
AU - Palmer, Marshall C.
AU - Read, Stephen E.
AU - Reid, Malcolm R.
AU - Stirling, Claudine H.
TI - Contemporaneous alkaline and subalkaline intraplate magmatism in the Dunedin Volcanic Group, NZ, caused by mantle heterogeneity
JF - NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
J2 - NEW ZEAL J GEOL GEOP
VL - https://doi.org/10.1080/00288306.2023.2277443
PY - 2023
SP - 1
EP - 25
PG - 25
SN - 0028-8306
DO - 10.1080/00288306.2023.2277443
UR - https://m2.mtmt.hu/api/publication/34427511
ID - 34427511
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Hudak, Michael R
AU - Feineman, Maureen D
AU - LaFemina, Peter C
AU - Geirsson, Halldór
AU - Agostini, Samuele
TI - Conduit formation and crustal microxenolith entrainment in a basaltic fissure eruption: Observations from Thríhnúkagígur Volcano, Iceland
JF - VOLCANICA
J2 - VOLCANICA
VL - 5
PY - 2022
IS - 2
SP - 249 - 270
SN - 2610-3540
DO - 10.30909/vol.05.02.249270
UR - https://m2.mtmt.hu/api/publication/33065307
ID - 33065307
AB - Thríhnúkagígur Volcano, Iceland, is a composite spatter cone and lava field characteristic of basaltic fissure eruptions. Lava drainback at the end of the eruption left ~60 m of evacuated conduit, and a 4 × 104 m3 cave formed by the erosion of unconsolidated tephra by the feeder dike. Field relationships within the shallow plumbing system provide three-dimensional insight into conduit formation in fissure systems. Petrographic estimates and the relative volumes of the cave and erupted lavas both indicate xenolithic tephra comprises 5–10 % of the erupted volume, which cannot be reproduced by geochemical mixing models. Although crustal xenolith entrainment is not geochemically significant, we posit that this process may be common in the Icelandic crust. The Thríhnúkagígur eruption illustrates how pervasive, poorly consolidated tephra or hyaloclastite can act as a mechanically weak pre-existing structure that provides a preferential pathway for magma ascent and may influence vent location.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Reichgelt, Tammo
AU - Lee, William G.
AU - Lee, Daphne E.
TI - The extinction of Miocene broad-leaved deciduous Nothofagaceae and loss of seasonal forest biomes in New Zealand
JF - REVIEW OF PALAEOBOTANY AND PALYNOLOGY
J2 - REV PALAEOBOT PALYNO
VL - 307
PY - 2022
SP - 104779
SN - 0034-6667
DO - 10.1016/j.revpalbo.2022.104779
UR - https://m2.mtmt.hu/api/publication/33150943
ID - 33150943
AB - Quantitative leaf mass per area reconstructions and prevalence of plicate vernation in broad-leaved Nothofagaceae fossils reveal that deciduousness was common in the middle to late Miocene of New Zealand. This functional type was subsequently lost, as modern-day New Zealand Nothofagaceae have small leaves that live for at least a year. Moreover, fully deciduous trees across all plant families are rare in the current New Zealand flora. Based on modern-day distribution in the Southern Hemisphere, broad-leaved deciduous Nothofagaceae occupy regions with consistently large seasonal differences in precipitation and cloud cover, relative to other functional types in the family (evergreen, small-leaved). Specifically, broad-leaved deciduous Nothofagaceae are in leaf in summer when cloud cover and precipitation are low, but are leafless in winter when cloud cover and precipitation is high. Notably, the seasonal difference in precipitation and cloud cover are more important in explaining deciduousness in Nothofagaceae than winter temperatures. Therefore, potential summer photosynthetic gains likely determine deciduousness in Nothofagaceae. Miocene palaeoclimate reconstructions reveal that New Zealand broad-leaved deciduous Nothofagaceae also thrived in a climate with larger seasonal precipitation differences than today, in an overall warmer climate. We suggest that deciduous Nothofagaceae in the New Zealand flora went extinct as the global climate cooled and summer photosynthetic gains diminished, as summers became progressively rainier and cloudier, favoring an evergreen habit.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - van, Wyk de Vries Benjamin
AU - Karátson, Dávid
AU - Cedric, Gouard
AU - Németh, Károly
AU - Vladislav, Rapprich
AU - Erkan, Aydar
TI - Inverted volcanic relief: Its importance in illustrating geological change and its geoheritage potential
JF - INTERNATIONAL JOURNAL OF GEOHERITAGE AND PARKS
J2 - INTERNATIONAL JOURNAL OF GEOHERITAGE AND PARKS
VL - 10
PY - 2022
IS - 1
SP - 47
EP - 83
PG - 37
SN - 2577-4441
DO - 10.1016/j.ijgeop.2022.02.002
UR - https://m2.mtmt.hu/api/publication/32702997
ID - 32702997
AB - We describe volcanic inverted relief sites around the world, making a comparative analysis of those most significant sites found from literature and our own search on imagery and global topographic maps. Over fifty significant areas of volcanic inverted relief were found. The comparative analysis is based on geoscience values defined by the main geological and landscape elements that define inverted relief. This subjective analysis is open and can be verified and extended if other significant sites emerge, thus forming the basis of a future, exhaustive global comparison of this important geomorphological feature. Inverted relief occurs when valleys transform to ridges due to differential erosion of relatively resistant valley-fill, and weaker slope lithologies. It is found in various geological settings, and it is very common in volcanic terrains, especially monogenetic volcanic fields, where most examples are inverted lava flows. Relief inversion provides a clear indication of slow geological changes and landscape evolution through erosion and can be thought of in popular terms as a geological clock. Volcanic inverted relief was recognised in the 18th - 19th centuries in the Chaîne des Puys (Auvergne, France), and used as evidence to first support plutonism by Nicolas Desmarest and then support uniformitarianism by George Poulett Scrope. We review the geological and geomorphological features of volcanic inverted relief world-wide, with an emphasis on the classical Auvergne. We explore how volcanic relief inversion chart geological changes, and their value for studying geological systems and landscape evolution. With our comparative analysis we can propose sites with the greatest geoheritage potential for representing inverted relief globally and suggest how this can be valued as geoheritage. As volcanic inverted relief is an important sub-set of all inverted relief, and is generally associated with important surface, volcanic and tectonic processes, and is often ongoing, it can be an important geoheritage component in natural sites. We suggest that it should should be present in the International Union of Geological Sciences (IUGS) Global Geosite list, can be a component of geosites in UNESCO Global Geoparks. It is also a feature for geological criteria (viii) in UNESCO World Heritage sites, where it fulfils all the requirements being both a major geomorphological feature and a fingerprint of significant geological processes in Earth evolution.
LA - English
DB - MTMT
ER -
TY - THES
AU - Abdelmounji, Amine
TI - Morphostructural typology of volcanism Quaternary of the Middle Atlas (Morocco). The example of the mixed volcano of Timahdite: Structural, petrological, mineralogical approach and geochemical
PY - 2021
UR - https://m2.mtmt.hu/api/publication/32519422
ID - 32519422
AB - The Middle-Atlas volcanic province represents an important magmatic activity center arranged into monogenic volcanoes during the Quaternary. Due to the variability of eruption dynamic styles and their combination, different pyroclastic successions and initial geometries were generated. The changes in the dominant eruption style trigger a new phase of edifice growth and therefore increases the complexity of the eruption history. On the basis of criteria regarding morphostructural aspects, eruptive styles, position, and nature of associated volcanic products, four volcanogenic groups were highlighted: i / cones, ii / maars associated with tuff rings, iii / compound cone-maar volcanoes, and iv / lava flows. Each group can be subdivided into subgroups according to the variety of forms and styles of activity during a single eruptive event.The application of the methods of physical volcanology, tephrostratigraphic and chemical�mineralogical analysis on the mafic lavas of the Timahdite volcano, which is regarded as the archetype of mixed Maar-cone volcanism. Our methodology made it possible to interpret the eruptive dynamics of this edifice raised on North Middle-Atlasic fault corridor, in two major phases: first phreatomagmatic conditioned by the water-magma interaction between magma Oued Guigou waters, then Strombolian. In the first case, the juvenile magma is composed of magnesian olivine (Fo80-85) and diopside-augite-type clinopyroxene. Amphibole is a monomineral residue clast of a mantle xenolith drained by rising magma. Lavas produced by the second Strombolian phase contain the same composition in addition to nepheline. Rare xenocrystals of albite feldspars indicate the sweeping of basicrustal material.Major and trace element analyzes carried out on mafic Strombolian lavas attest to an undersaturated alkaline signature for these basalts classified into two types: nephelinites and normative nepheline basanites. The nephelinites constitute the main part of the pyroclastic fallout relayed by a basanite massive flow which reflects the transition to a terminal effusive regime. These intraplate basalts are not cogenetic. Their formation would be controlled by the partial fusion of enriched peridotite presumably with spinel, attested by the presence of the same xenoliths in these lavas. The partial melting takes place at a depth of 65km at the lithosphere-asthenosphere limit. The melting rate remains low around 1 to 2% for nephelinites and 3 to 4% for basanites, which justifies the lack of a real magmatic reservoir under the Middle-Atlas plateau.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Gillies, Janina K.
AU - Kennedy, Ben M.
AU - Gravley, Darren M.
AU - Leonard, Graham S.
AU - Cowlyn, James
TI - Identifying Pyroclastic Density Currents From Partial Outcrop Exposure on Mt. Ruapehu, New Zealand
JF - FRONTIERS IN EARTH SCIENCE
J2 - FRONT EARTH SC-SWITZ
VL - 8
PY - 2020
PG - 18
SN - 2296-6463
DO - 10.3389/feart.2020.542932
UR - https://m2.mtmt.hu/api/publication/31754775
ID - 31754775
AB - Pyroclastic density current (PDC) deposits, especially small to medium volume events, have low preservation potential at many volcanoes, particularly when unconsolidated or deposited on steep, glaciated slopes. This may lead to an underrepresentation of these events in the eruptive record, and consequently, in hazard management planning; leaving populations on and around the volcanoes unprepared for the threat of these smaller eruptions. Therefore, it is important to investigate and recognize these smaller events in the volcanic record to create more comprehensive plans for future eruptions. Mt. Ruapehu is one of New Zealand's most active volcanoes, last erupting in 2007. Few studies have investigated the PDC occurrence on this volcano, despite PDCs being one of the most hazardous volcanic processes. Poor preservation of PDC deposits, due to small volume, past glaciations, erosion, burial, and poor consolidation has left a significant gap in Mt. Ruapehu's eruptive record. By identifying and characterizing PDCs on Mt. Ruapehu this paper provides an updated account of PDC occurrence on this volcano, especially for smaller scale PDCs. Comprehensive field-mapping forms the basis for this study by identifying PDC deposits from partial outcrop exposures. We use field observations of these deposits to describe the lithofacies and infer PDC behavior. Relative stratigraphy and whole-rock geochemistry are used to correlate deposits with dated units from literature and provide approximate age ranges. This study describes 12 PDC deposits representing at least 10 previously unidentified flows. Combined with PDCs identified in previous studies there is a total of 23 PDC deposits found on Mt. Ruapehu, including the PDC observed during the 1945 eruption. These PDCs have been emplaced throughout Mt. Ruapehu's 250 ka eruptive history. The PDCs were concentrated and dominated by granular flow or granular fluid-based flow transport regimes. The lithofacies show PDCs forming from column collapse and dome collapse or explosion events. This demonstrates that Mt. Ruapehu is capable of producing a spectrum of PDC styles and sizes, something that must be considered during future hazard planning on the volcano.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Gravis, I.
AU - Németh, Károly
AU - Twemlow, C.
AU - Németh, B.
TI - The Case for Community-Led Geoheritage and Geoconservation Ventures in Māngere, South Auckland, and Central Otago, New Zealand
JF - GEOHERITAGE
J2 - GEOHERITAGE
VL - 12
PY - 2020
IS - 1
PG - 24
SN - 1867-2477
DO - 10.1007/s12371-020-00449-4
UR - https://m2.mtmt.hu/api/publication/31176807
ID - 31176807
N1 - Export Date: 14 February 2020
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Mountaj, Sara
AU - Remmal, Toufik
AU - El Amrani, Iz-Eddine El Hassani
AU - Makhoukhi, Samira
AU - Lakroud, Kawtar
AU - de Vries, Benjamin Van Week
TI - Phreatomagmatic plioquaternary volcanism in the Middle Atlas: Analysis of the eruptive sequence of the Lechmine n'Ait El Haj maar
JF - ARABIAN JOURNAL OF GEOSCIENCES
J2 - ARAB J GEOSCI
VL - 13
PY - 2020
PG - 16
SN - 1866-7511
DO - 10.1007/s12517-020-05554-w
UR - https://m2.mtmt.hu/api/publication/31448891
ID - 31448891
N1 - University Hassan II-Faculty of Sciences of Casablanca, Km 8 Route El Jadida, B. P 5366 Maarif, Casablanca, 20100, Morocco
Scientific Institute of Rabat, Avenue Ibn Batouta, B. P 703, Rabat, 10106, Morocco
Laboratoire Magma et volcan, Université Blaise Pascal Clérment-Ferrand, 6 Avenue Blaise Pascal, Aubière, 63170, France
Cited By :1
Export Date: 11 November 2022
Correspondence Address: Mountaj, S.; University Hassan II-Faculty of Sciences of Casablanca, Km 8 Route El Jadida, B. P 5366 Maarif, Morocco; email: sara.mountaj@gmail.com
Funding text 1: This study belongs to the multidisciplinary research project on the Geomaterials and Volcanic Geosites of Morocco: need for their valorization and exploitation in the prospects for a sustainable development, sponsored by Hassan II Academy of Sciences and Techniques. Many thanks to the research team, professors and Ph.D. students, in Faculty of Sciences of Hassan II University-Casablanca, the Scientific Institute in Rabat and the Faculty of Sciences and Techniques of Hassan II University—Mohammadia. Special thanks to Domenico M Doronzo for his relevant comments and questions that allowed me to improve the quality of this paper.
AB - Lechmine n'Ait El Haj (LNH) is a monogenetic plioquaternary maar, lying in the volcanic province of the MiddleAtlas. It is a 110-m-deep crater located in the Liassic limestones. The tephra deposits surrounding the crater are mainly made up of depositional units (surges and projectas) interpreted as deposits of phreatomagmatic origin. They are topped by a small unit of massive breccia tuff reflecting magmatic deposits. The maar is a result of the interaction between the ascending magma and karstic water, in an intraplate volcanism context.Water, causing this eruption, is drained by an open system of fractures in the limestone. The explosion started by phreatomagmatic dynamism, producing a big stack of pyroclastic deposits and pyroclastic falls. During the eruption, the crater grows progressively from the eruptive center to the Northwest. The upper part of the phreatomagmatic deposits is characterized by a typical mud crack structure. A transition to a strombolian dynamism occurred throughout the end of volcanic activity. Meanwhile, a lava flow, coming from the volcanic plateau, discharged in the crater's center. With the eruption resumption, the lava is strongly fragmented; therefore, a small cone is created especially in the northern flank of the maar. Towards the end of the volcanic activity, a supply of karstic water causes another transition of the eruptive style from strombolian to phreatomagmatic dynamism. A significant karst collapse in the southern flank of the LNH maar has occurred, leading to its current morphology.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Németh, Károly
AU - Kósik, Szabolcs
TI - The role of hydrovolcanism in the formation of the Cenozoic monogenetic volcanic fields of Zealandia
JF - NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
J2 - NEW ZEAL J GEOL GEOP
VL - 63
PY - 2020
IS - 4
SP - 402
EP - 427
PG - 10
SN - 0028-8306
DO - 10.1080/00288306.2020.1770304
UR - https://m2.mtmt.hu/api/publication/31390055
ID - 31390055
N1 - Cited By :6
Export Date: 26 May 2021
Correspondence Address: Németh, K.; Massey University, New Zealand; email: k.nemeth@massey.ac.nz
Funding details: Massey University
Funding text 1: We grateful for the invitation of the NZJGG to contribute to the IAVCEI 2022 special issue to provide an overview of Cenozoic hydrovolcanism in the Zealandia context. We thankful for all the suggestions and ideas colleagues provided in the past decades to be able to provide a concise overview on this topic. Many thanks for Julie Palmer (Massey University) for reading the original draft and make good suggestions on presentation style and context. The excellent formal Journal reviews by Rosie Cole, Alan Bischoff and an Anonymous reviewer as well as the editorial work of James Scott are greatly appreciated.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Phillips, Thomas B.
AU - Magee, Craig
TI - Structural controls on the location, geometry and longevity of an intraplate volcanic system: the Tuatara Volcanic Field, Great South Basin, New Zealand
JF - JOURNAL OF THE GEOLOGICAL SOCIETY
J2 - J GEOL SOC LONDON
VL - 177
PY - 2020
IS - 5
SP - 1039
EP - 1056
PG - 18
SN - 0016-7649
DO - 10.1144/jgs2020-050
UR - https://m2.mtmt.hu/api/publication/31754770
ID - 31754770
AB - Intraplate volcanism is widely distributed across the continents, but the controls on the 3D geometry and longevity of individual volcanic systems remain poorly understood. Geophysical data provide insights into magma plumbing systems, but, as a result of the relatively low resolution of these techniques, it is difficult to evaluate how magma transits highly heterogeneous continental interiors. We use borehole-constrained 2D seismic reflection data to characterize the 3D geometry of the Tuatara Volcanic Field located offshore New Zealand's South Island and investigate its relationship with the pre-existing structure. This c. 270 km(2) field is dominated by a dome-shaped lava edifice, surrounded and overlain by c. 69 volcanoes and >70 sills emplaced over 40 myr from the Late Cretaceous to Early Eocene (c. 85-45 Ma). The Tuatara Volcanic Field is located above a basement terrane boundary represented by the Livingstone Fault; the recently active Auckland Volcanic Field is similarly located along-strike on North Island. We suggest that the Livingstone Fault controlled the location of the Tuatara Volcanic Field by producing relief at the base of the lithosphere, thereby focussing lithospheric detachment over c. 40 myr, and provided a pathway that facilitated the ascent of magma We highlight how observations from ancient intraplate volcanic systems may inform our understanding of active intraplate volcanic systems, including the Auckland Volcanic Field.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Reichgelt, Tammo
AU - D'Andrea, William J.
AU - Valdivia-McCarthy, Ailin del C.
AU - Fox, Bethany R. S.
AU - Bannister, Jennifer M.
AU - Conran, John G.
AU - Lee, William G.
AU - Lee, Daphne E.
TI - Elevated CO2, increased leaf-level productivity, and water-use efficiency during the early Miocene
JF - CLIMATE OF THE PAST
J2 - CLIM PAST
VL - 16
PY - 2020
IS - 4
SP - 1509
EP - 1521
PG - 13
SN - 1814-9324
DO - 10.5194/cp-16-1509-2020
UR - https://m2.mtmt.hu/api/publication/31754774
ID - 31754774
AB - Rising atmospheric CO2 is expected to increase global temperatures, plant water-use efficiency, and carbon storage in the terrestrial biosphere. A CO2 fertilization effect on terrestrial vegetation is predicted to cause global greening as the potential ecospace for forests expands. However, leaf-level fertilization effects, such as increased productivity and water-use efficiency, have not been documented from fossil leaves in periods of heightened atmospheric CO2. Here, we use leaf gas-exchange modeling on a well-preserved fossil flora from early Miocene New Zealand, as well as two previously published tropical floras from the same time period, to reconstruct atmospheric CO2, leaf-level productivity, and intrinsic water-use efficiency. Leaf gas-exchange rates reconstructed from early Miocene fossils, which grew at southern temperate and tropical latitudes when global average temperatures were 5-6 degrees C higher than today, reveal that atmospheric CO2 was similar to 450-550 ppm. Early Miocene CO2 was similar to projected values for 2040 CE and is consistent with an Earth system sensitivity of 3-7 degrees C to a doubling of CO2. The Southern Hemisphere temperate leaves had higher reconstructed productivity than modern analogs, likely due to a longer growing season. This higher productivity was presumably mirrored at northern temperate latitudes as well, where a greater availability of landmass would have led to increased carbon storage in forest biomass relative to today. Intrinsic water-use efficiency of both temperate and tropical forest trees was high, toward the upper limit of the range for modern trees, which likely expanded the habitable range in regions that could not support forests with high moisture demands under lower atmospheric CO2. Overall, early Miocene elevated atmospheric CO2 sustained globally higher temperatures, and our results provide the first empirical evidence of concomitant enhanced intrinsic water-use efficiency, indicating a forest fertilization effect.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Scott, James M.
AU - Pontesilli, Alessio
AU - Brenna, Marco
AU - White, James D. L.
AU - Giacalone, Emanuele
AU - Palin, J. Michael
AU - le Roux, Petrus J.
TI - The Dunedin Volcanic Group and a revised model for Zealandia's alkaline intraplate volcanism
JF - NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
J2 - NEW ZEAL J GEOL GEOP
PY - 2020
PG - 20
SN - 0028-8306
DO - 10.1080/00288306.2019.1707695
UR - https://m2.mtmt.hu/api/publication/31448890
ID - 31448890
AB - The intraplate rocks of the Dunedin Volcanic Group (DVG) in New Zealand's South Island erupted in two discrete areas between 25 and 21 Ma before becoming distributed over > 7,800 km(2) until similar to 9 Ma. Although most eruptive centres were of small volume and mainly vented alkaline basanite, the largest centre-the 16-11 Ma composite Dunedin Volcano-discharged basanite and basalt through to trachyte and phonolite. DVG components were mainly derived from mantle sources with Sr-87/Sr-86 = similar to 0.7029, Nd-143/Nd-144 = similar to 0.5129, Pb-206/Pb-204 = similar to 20.0, Pb-207/Pb-204 = similar to 15.65, Pb-208/Pb-204 = 39.5 and epsilon Hf = +3.5 to + 10.1 that extended to anomalously light delta Mg-26 (-0.47). Exceptions are some potassic basalts in NW of the field with elevated Pb-207/Pb-204 and more radiogenic Sr. The DVG Sr-Nd-Pb isotopes mostly overlap with metasomatised anhydrous mantle peridotite xenoliths but have less radiogenic Hf, meaning that equivalent anhydrous mantle rock-types cannot be the sole magma sources. Although there is debate regarding whether DVG was derived from the lithospheric or asthenospheric mantle, intermittent melting of a middle lithospheric mantle metasomatised by hydrous asthenosphere-derived melts could account for: (1) the widely distributed magmatism for similar to 16 Myr during which time Otago lithosphere shifted NW similar to 870 km over the asthenosphere; (2) the small chemical range of the least evolved magmas; (3) the Sr-Nd-Pb-Hf isotopic range; and (4) an absence of lower lithosphere mantle xenoliths. This process could account for other occurrences of isotopically restricted Zealandia alkaline intraplate volcanism.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Amine, A.
AU - El, Amrani El Hassani I.-E.
AU - Remmal, T.
AU - El, Kamel F.
AU - Van, Wyk De Vries B.
AU - Boivin, P.
TI - Geomorphological classification and landforms inventory of the Middle-Atlas volcanic Province (Morocco): Scientific value and educational potential
JF - QUAESTIONES GEOGRAPHICAE
J2 - QUAEST GEOGR
VL - 38
PY - 2019
IS - 1
SP - 107
EP - 129
PG - 23
SN - 0137-477X
DO - 10.2478/quageo-2019-0010
UR - https://m2.mtmt.hu/api/publication/30639006
ID - 30639006
N1 - Export Date: 19 April 2019
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Bischoff, Alan
AU - Nicol, Andrew
AU - Barrier, Andrea
AU - Wang, Hanfei
TI - Paleogeography and volcanic morphology reconstruction of a buried monogenetic volcanic field (part 2)
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 81
PY - 2019
IS - 9
SN - 0258-8900
DO - 10.1007/s00445-019-1317-6
UR - https://m2.mtmt.hu/api/publication/30784803
ID - 30784803
N1 - Cited By :10
Export Date: 13 December 2022
Correspondence Address: Bischoff, A.; Department of Geological Sciences, New Zealand; email: alan.bischoff@canterbury.ac.nz
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Bischoff, Alan
AU - Nicol, Andrew
AU - Cole, Jim
AU - Gravley, Darren
TI - Stratigraphy of Architectural Elements of a Buried Monogenetic Volcanic System
JF - OPEN GEOSCIENCES
J2 - OPEN GEOSCI
VL - 11
PY - 2019
IS - 1
SP - 581
EP - 616
PG - 36
SN - 2391-5447
DO - 10.1515/geo-2019-0048
UR - https://m2.mtmt.hu/api/publication/31067280
ID - 31067280
N1 - Cited By :8
Export Date: 21 June 2021
Correspondence Address: Bischoff, A.; Department of Geological Sciences, New Zealand; email: alan.bischoff@canterbury.ac.nz
Funding details: Indian Health Service, IHS
Funding details: Ministry of Business, Innovation and Employment, MBIE
Funding text 1: We would like to thank IHS Markit and Schlumberger for providing academic licence to use the Kingdom and Petrel software. We are grateful to the New Zealand Petroleum and Minerals and the Ministry of Business, Innovation and Employment of New Zealand for providing the dataset and funding for this study. Thanks for the constructive reviews of Károly Németh and an anonymous reviewer.
Funding text 2: We would like to thank IHS Markit and Schlumberger for providing academic licence to use the Kingdom and Petrel software. We are grateful to the New Zealand Petroleum and Minerals and the Ministry of Business, Innovation and Employment of New Zealand for providing the dataset and funding for this study. Thanks for the constructive reviews of K?roly N?meth and an anonymous reviewer.
Funding Agency and Grant Number: New Zealand Petroleum and Minerals; Ministry of Business, Innovation and Employment of New ZealandNew Zealand Ministry of Business, Innovation and Employment (MBIE)
Funding text: We would like to thank IHS Markit and Schlumberger for providing academic licence to use the Kingdom and Petrel software. We are grateful to the New Zealand Petroleum and Minerals and the Ministry of Business, Innovation and Employment of New Zealand for providing the dataset and funding for this study. Thanks for the constructive reviews of Karoly Nemeth and an anonymous reviewer.
AB - Large volumes of magma emplaced and deposited within sedimentary basins can have an impact on the architecture and geological evolution of these basins. Over the last decade, continuous improvement in techniques such as seismic volcano-stratigraphy and 3D visualisation of igneous bodies has helped increase knowledge about the architecture of volcanic systems buried in sedimentary basins. Here, we present the complete architecture of the Maahunui Volcanic System (MVS), a middle Miocene monogenetic volcanic field now buried in the offshore Canterbury Basin, South Island of New Zealand. We show the location, geometry, size, and stratigraphic relationships between 25 main intrusive, extrusive and sedimentary architectural elements, in a comprehensive volcano-stratigraphic framework that explains the evolution of the MVS from emplacement to complete burial in the host sedimentary basin. Understanding the relationships between these diverse architectural elements allows us to reconstruct the complete architecture of the MVS, including its shallow (<3 km) plumbing system, the morphology of the volcanoes, and their impact in the host sedimentary basin during their burial. The plumbing system of the MVS comprises saucer-shaped sills, dikes and sill swarms, minor stocks and laccoliths, and pre-eruptive strata deformed by intrusions. The eruptive and associated sedimentary architectural elements define the morphology of volcanoes in the MVS, which comprise deep-water equivalents of crater and cone-type volcanoes. After volcanism ceased, the process of degradation and burial of volcanic edifices formed sedimentary architectural elements such as inter-cone plains, epiclastic plumes, and canyons. In-sights from the architecture of the MVS can be used to explore for natural resources such as hydrocarbons, geothermal energy and minerals in buried and active volcanic systems elsewhere.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Kaulfuss, Uwe
AU - Lee, Daphne E
AU - Wartho, Jo-Anne
AU - Bowie, Elliot
AU - Lindqvist, Jon K
AU - Conran, John G
AU - Bannister, Jennifer M
AU - Mildenhall, Dallas C
AU - Kennedy, Elizabeth M
AU - Gorman, Andrew R
TI - Geology and palaeontology of the Hindon Maar Complex: A Miocene terrestrial fossil Lagerstatte in southern New Zealand
JF - PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
J2 - PALAEOGEOGR PALAEOCL
VL - 500
PY - 2018
SP - 52
EP - 68
PG - 17
SN - 0031-0182
DO - 10.1016/j.palaeo.2018.03.022
UR - https://m2.mtmt.hu/api/publication/27603357
ID - 27603357
LA - English
DB - MTMT
ER -
TY - JOUR
AU - McLeod, Oliver E.
AU - White, James D. L.
TI - Petrogenetic links between the Dunedin Volcano and peripheral volcanics of the Karitane Suite
JF - NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
J2 - NEW ZEAL J GEOL GEOP
VL - 61
PY - 2018
IS - 4
SP - 543
EP - 561
PG - 19
SN - 0028-8306
DO - 10.1080/00288306.2018.1518248
UR - https://m2.mtmt.hu/api/publication/30479233
ID - 30479233
AB - The Karitane Suite of East Otago marks the northern extent of evolved magmas erupted contemporaneously on the periphery of the Miocene Dunedin Volcano. Compositions range from relatively primitive basalts to highly evolved trachyandesites and phonolites with strong geochemical affinity to Dunedin Volcano magmas and their fractionation trends. Karitane trachyandesites are abundant with fluidal, hornblende-rich mafic inclusions interpreted as remnant features of magma mingling between basanitic dikes and evolved magma reservoirs dispersed in the crust. Mineral data reveals discrete populations of Mg-rich diopside within evolved members that suggest they were inherited during mixing with basanite magmas prior to eruption. It is proposed that the overall distribution and concentration of evolved magmas within the Dunedin volcanic system is source-controlled and a function of mantle productivity. The Karitane Suite is therefore the product of low-volume, dispersed peripheral magma reservoirs recharged and mixed with rapidly ascending basanitic dikes of the surrounding Waipiata volcanic field.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Torres-Orozco, Rafael
AU - Cronin, Shane J.
AU - Pardo, Natalia
AU - Palmer, Alan S.
TI - Volcanic hazard scenarios for multiphase andesitic Plinian eruptions from lithostratigraphy: Insights into pyroclastic density current diversity at Mount Taranaki, New Zealand
JF - GEOLOGICAL SOCIETY OF AMERICA BULLETIN
J2 - GEOL SOC AM BULL
VL - 130
PY - 2018
IS - 9-10
SP - 1645
EP - 1663
PG - 19
SN - 0016-7606
DO - 10.1130/B31850.1
UR - https://m2.mtmt.hu/api/publication/30488875
ID - 30488875
AB - Over the past 5000 yr at Mount Taranaki, a Plinian eruption has occurred at least every 300 yr, with the latest in A.D. 1655. Based on detailed lithofacies analysis, three Plinian eruption scenarios are possible during future magmatic unrest at this volcano's andesitic summit crater (2500 m high), or at the basaltic Fanthams Peak satellite vent (1960 m). These scenarios involve comparable climactic phases of steady to oscillating eruption columns but contrasting pre- and postclimactic phases, represented by the deposits of diverse concentrated to dilute pyroclastic density currents. The most common scenario (I) encompasses sudden decompression of closed conduits via unroofing by dome collapse, generating block-and-ash flows and laterally directed blast-type pyroclastic density currents. Scenario II involves continuous shifting between transient open and clogged conduits by repeated plugging-and-release of chilled magma, producing a range of pyroclastic density current styles. Scenario III is mainly restricted to satellite vents, and it reflects a rapid progression into open conduits and quasi-steady Plinian phases. In the case of Mount Taranaki, in every case, pyroclastic falls would cover the most populated areas, at 20-30 km from the crater, with 10-cm-thick deposits, while pyroclastic density currents could threaten farmlands and urban locations at 15-18 km. These scenarios highlight the major role that pyroclastic density currents play in evaluations of volcanic hazards around Taranaki and other similar andesitic volcanoes. The scenarios can be tailored to different sites around the world by localized lithostratigraphic studies, and they can also be used to plan emergency management if specific magma compositions, eruption sites, or eruptive styles are confirmed at the outset of episodes.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Jones, Daniel A
AU - Wilson, Gary S
AU - Gorman, Andrew R
AU - Fox, Bethany R S
AU - Lee, Daphne E
AU - Kaulfuss, Uwe
TI - A drill-hole calibrated geophysical characterisation of the 23 Ma Foulden Maar stratigraphic sequence, Otago, New Zealand
JF - NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
J2 - NEW ZEAL J GEOL GEOP
VL - 60
PY - 2017
IS - 4
SP - 465
EP - 477
PG - 13
SN - 0028-8306
DO - 10.1080/00288306.2017.1369130
UR - https://m2.mtmt.hu/api/publication/27107145
ID - 27107145
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Kaulfuss, Uwe
TI - Crater stratigraphy and the post-eruptive evolution of Foulden Maar, southern New Zealand
JF - NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
J2 - NEW ZEAL J GEOL GEOP
VL - 60
PY - 2017
IS - 4
SP - 410
EP - 432
PG - 23
SN - 0028-8306
DO - 10.1080/00288306.2017.1365733
UR - https://m2.mtmt.hu/api/publication/27107146
ID - 27107146
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Marti, J
AU - Planaguma, L L
AU - Geyer, A
AU - Aguirre-Diaz, G
AU - Pedrazzi, D
AU - Bolos, X
TI - Basaltic ignimbrites in monogenetic volcanism: the example of La Garrotxa volcanic field
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 79
PY - 2017
IS - 5
PG - 12
SN - 0258-8900
DO - 10.1007/s00445-017-1113-0
UR - https://m2.mtmt.hu/api/publication/26730085
ID - 26730085
LA - English
DB - MTMT
ER -
TY - THES
AU - Rafael, Torres-Orozco
TI - Understanding the largest-scale explosive volcanism at Mt. Taranaki, New Zealand
PY - 2017
SP - 274
UR - https://m2.mtmt.hu/api/publication/32077242
ID - 32077242
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Reichgelt, Tammo
AU - D'Andrea, William J
AU - Fox, Bethany R S
TI - Abrupt plant physiological changes in southern New Zealand at the termination of the Mi-1 event reflect shifts in hydroclimate and pCO(2)
JF - EARTH AND PLANETARY SCIENCE LETTERS
J2 - EARTH PLANET SC LETT
VL - 455
PY - 2016
SP - 115
EP - 124
PG - 10
SN - 0012-821X
DO - 10.1016/j.epsl.2016.09.026
UR - https://m2.mtmt.hu/api/publication/26369146
ID - 26369146
LA - English
DB - MTMT
ER -
TY - JOUR
AU - van Otterloo, Jozua
AU - Cas, Ray A F
TI - Low-temperature emplacement of phreatomagmatic pyroclastic flow deposits at the monogenetic Mt Gambier Volcanic Complex, South Australia, and their relevance for understanding some deposits in diatremes
JF - JOURNAL OF THE GEOLOGICAL SOCIETY
J2 - J GEOL SOC LONDON
VL - 173
PY - 2016
IS - 4
SP - 701
EP - 710
PG - 10
SN - 0016-7649
DO - 10.1144/jgs2015-122
UR - https://m2.mtmt.hu/api/publication/26003236
ID - 26003236
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Moufti, Mohammed R
AU - Németh, Károly
AU - El-Masry, Nabil
AU - Qaddah, Atef
TI - Volcanic Geotopes and Their Geosites Preserved in an Arid Climate Related to Landscape and Climate Changes Since the Neogene in Northern Saudi Arabia: Harrat Hutaymah (Hai'il Region)
JF - GEOHERITAGE
J2 - GEOHERITAGE
VL - 7
PY - 2015
IS - 2
SP - 103
EP - 118
PG - 16
SN - 1867-2477
DO - 10.1007/s12371-014-0110-3
UR - https://m2.mtmt.hu/api/publication/25688525
ID - 25688525
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Tchamabe, Boris Chako
AU - Ohba, Takeshi
AU - Kereszturi, Gabor
AU - Németh, Károly
AU - Aka, Festus Tongwa
AU - Youmen, Dieudonne
AU - Issa, .
AU - Miyabuchi, Yasuo
AU - Ooki, Seigo
AU - Tanyileke, Gregory
AU - Hell, Joseph Victor
TI - Towards the reconstruction of the shallow plumbing system of the Barombi Mbo Maar (Cameroon) Implications for diatreme growth processes of a polygenetic maar volcano
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 301
PY - 2015
SP - 293
EP - 313
PG - 21
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2015.06.004
UR - https://m2.mtmt.hu/api/publication/25688524
ID - 25688524
N1 - Megjegyzés-25243085
Hiányzó Jelleg: 'JOUR\n\nArticle'
Admin megjegyzés-25243085
tblcategory: (Category) ('JOUR\n\nArticle') #Jelleg
Összes idézések száma a WoS-ban: 0
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Carracedo, Sanchez M
AU - Sarrionandia, F
AU - Gil, Ibarguchi J I
TI - Post-depositional intrusion and extrusion through a scoria and spatter cone of fountain-fed nephelinite lavas (Las Herrerias volcano, Calatrava, Spain)
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 76
PY - 2014
IS - 9
PG - 17
SN - 0258-8900
DO - 10.1007/s00445-014-0860-4
UR - https://m2.mtmt.hu/api/publication/25688526
ID - 25688526
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Karacik, Zekiye
AU - Genc, Sengul C
TI - Volcano-stratigraphy of the extension-related silicic volcanism of the Cubukludag Graben, western Turkey: an example of generation of pyroclastic density currents
JF - GEOLOGICAL MAGAZINE
J2 - GEOL MAG
VL - 151
PY - 2014
IS - 3
SP - 492
EP - 516
PG - 25
SN - 0016-7568
DO - 10.1017/S0016756813000435
UR - https://m2.mtmt.hu/api/publication/25688527
ID - 25688527
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Mildenhall, Dallas C
AU - Kennedy, Elizabeth M
AU - Lee, Daphne E
AU - Kaulfuss, Uwe
AU - Bannister, Jennifer M
AU - Fox, Bethany
AU - Conran, John G
TI - Palynology of the early Miocene Foulden Maar, Otago, New Zealand: Diversity following destruction
JF - REVIEW OF PALAEOBOTANY AND PALYNOLOGY
J2 - REV PALAEOBOT PALYNO
VL - 204
PY - 2014
SP - 27
EP - 42
PG - 16
SN - 0034-6667
DO - 10.1016/j.revpalbo.2014.02.003
UR - https://m2.mtmt.hu/api/publication/25688534
ID - 25688534
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Seib, Nadine
AU - Kley, Jonas
AU - Buechel, Georg
TI - Identification of maars and similar volcanic landforms in the West Eifel Volcanic Field through image processing of DTM data: efficiency of different methods depending on preservation state
JF - INTERNATIONAL JOURNAL OF EARTH SCIENCES
J2 - INT J EARTH SCI
VL - 102
PY - 2013
IS - 3
SP - 875
EP - 901
PG - 27
SN - 1437-3254
DO - 10.1007/s00531-012-0829-5
UR - https://m2.mtmt.hu/api/publication/25706353
ID - 25706353
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Tchamabe, Boris Chako
AU - Youmen, Dieudonne
AU - Owona, Sebastien
AU - Issa, .
AU - Ohba, Takeshi
AU - Németh, Károly
AU - Ngapna, Moussa Nsangou
AU - Asaah, Asobo N E
AU - Aka, Festus T
AU - Tanyileke, Gregory
AU - Hell, Joseph V
TI - Eruptive history of the Barombi Mbo Maar, Cameroon Volcanic Line, Central Africa: Constraints from volcanic facies analysis
JF - CENTRAL EUROPEAN JOURNAL OF GEOSCIENCES
J2 - CENT EUR J GEOSCI
VL - 5
PY - 2013
IS - 4
SP - 480
EP - 496
PG - 17
SN - 2081-9900
DO - 10.2478/s13533-012-0147-2
UR - https://m2.mtmt.hu/api/publication/25688535
ID - 25688535
N1 - Összes idézések száma a WoS-ban: 0
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Valentine, Greg A
AU - Cortes, Joaquin A
TI - Time and space variations in magmatic and phreatomagmatic eruptive processes at Easy Chair (Lunar Crater Volcanic Field, Nevada, USA)
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 75
PY - 2013
IS - 9
PG - 13
SN - 0258-8900
DO - 10.1007/s00445-013-0752-z
UR - https://m2.mtmt.hu/api/publication/25688530
ID - 25688530
LA - English
DB - MTMT
ER -
TY - JOUR
AU - van Otterloo, Jozua
AU - Cas, Raymond A F
AU - Sheard, Malcolm J
TI - Eruption processes and deposit characteristics at the monogenetic Mt. Gambier Volcanic Complex, SE Australia: implications for alternating magmatic and phreatomagmatic activity
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 75
PY - 2013
IS - 8
PG - 21
SN - 0258-8900
DO - 10.1007/s00445-013-0737-y
UR - https://m2.mtmt.hu/api/publication/25688531
ID - 25688531
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Avellan, DR
AU - Macias, JL
AU - Pardo, N
AU - Scolamacchia, T
AU - Rodriguez, D
TI - Stratigraphy, geomorphology, geochemistry and hazard implications of the Nejapa Volcanic Field, western Managua, Nicaragua
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 213
PY - 2012
SP - 51
EP - 71
PG - 21
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2011.11.002
UR - https://m2.mtmt.hu/api/publication/22261446
ID - 22261446
LA - English
DB - MTMT
ER -
TY - BOOK
AU - Pooja, V. Kshirsagar
AU - Hetu, C. Sheth
AU - Badrealam, Shaikh
TI - Mafic alkalic magmatism in central Kachchh, India: a monogenetic volcanic field in the northeastern Deccan Traps
T3 - Geoscience Society of New Zealand Miscellaneous Publication, ISSN 2230-4487 ; 131A.
PB - Geoscience Society of New Zealand
C1 - Lower Hutt
PY - 2012
SP - 2
UR - https://m2.mtmt.hu/api/publication/32065563
ID - 32065563
LA - English
DB - MTMT
ER -
TY - BOOK
AU - Uwe, Kaulfuss
AU - Jon, Lindqvist
AU - Daniel, Jones
AU - Bethany, Fox
AU - Gary, Wilson
AU - Daphne, Lee
TI - Post-eruptive maar crater sedimentation inferred from outcrop, drill cores and geophysics - Foulden Maar, New Zealand
T3 - Geoscience Society of New Zealand Miscellaneous Publication, ISSN 2230-4487 ; 134A.
PB - Geoscience Society of New Zealand
C1 - Lower Hutt
PY - 2012
SP - 2
UR - https://m2.mtmt.hu/api/publication/32065560
ID - 32065560
N1 - Geoscience Society of New Zealand Miscellaneous Publications 1301A [ISSN Online 2230-4498, ISSN Print 2230-4487]
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Valentine, GA
TI - Shallow plumbing systems for small-volume basaltic volcanoes, 2: Evidence from crustal xenoliths at scoria cones and maars
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 223
PY - 2012
SP - 47
EP - 63
PG - 17
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2012.01.012
UR - https://m2.mtmt.hu/api/publication/22713461
ID - 22713461
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Kshirsagar, Pooja V.
AU - Sheth, Hetu C.
AU - Shaikh, Badrealam
TI - Mafic alkalic magmatism in central Kachchh, India: A monogenetic volcanic field in the northwestern Deccan Traps
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 73
PY - 2011
IS - 5
SP - 595
EP - 612
PG - 18
SN - 0258-8900
DO - 10.1007/s00445-010-0429-9
UR - https://m2.mtmt.hu/api/publication/21494633
ID - 21494633
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Valentine, GA
AU - Shufelt, NL
AU - Hintz, ARL
TI - Models of maar volcanoes, Lunar Crater (Nevada, USA)
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 73
PY - 2011
IS - 6
SP - 753
EP - 765
PG - 13
SN - 0258-8900
DO - 10.1007/s00445-011-0451-6
UR - https://m2.mtmt.hu/api/publication/21606326
ID - 21606326
N1 - : FN Thomson Reuters Web of Knowledge
LA - English
DB - MTMT
ER -
TY - JOUR
AU - White, J D L
AU - Ross, P -S
TI - Maar-diatreme volcanoes: A review
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 201
PY - 2011
IS - 1-4
SP - 1
EP - 29
PG - 29
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2011.01.010
UR - https://m2.mtmt.hu/api/publication/21559297
ID - 21559297
N1 - Cited By :277
Export Date: 11 November 2022
Correspondence Address: White, J.D.L.; Department of Geology, P.O. Box 56, Dunedin, New Zealand; email: james.white@stonebow.otago.ac.nz
Funding details: National Science Foundation, NSF
Funding details: University of Otago
Funding details: Foundation for Research, Science and Technology, FRST
Funding details: Natural Sciences and Engineering Research Council of Canada, NSERC
Funding details: Antarctica New Zealand
Funding details: Fonds Québécois de la Recherche sur la Nature et les Technologies, FQRNT
Funding text 1: B.C. Hearn and V. Lorenz expertly guided us through the Missouri River Breaks diatremes and the West Eifel volcanic field, respectively. We thank them as well as R.A.F. Cas, B.A. Kjarsgaard, S. Kurszlaukis, M. McClintock, R.H. Mitchell, M. Skinner, and R.S.J. Sparks for discussions on maar-diatreme volcanism. Current research on maar-diatreme volcanism at INRS is funded by a NSERC discovery grant to PSR, and at Otago University by FRST via subcontract from GNS Science to JDLW. Additional funding for work presented here has been provided by Antarctica New Zealand , Fonds québécois de la recherche sur la nature et les technologies (PhD scholarship to PSR), the University of Otago , and an NSF grant to RV Fisher. B. Kjarsgaard and G. Valentine provided constructive journal reviews of the manuscript.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Kereszturi, G
AU - Csillag, Gábor
AU - Németh, Károly
AU - Sebe, Krisztina
AU - Balogh, Kadosa
AU - Jáger, Viktor
TI - Volcanic architecture, eruption mechanism and landform evolution of a Plio/Pleistocene intracontinental basaltic polycyclic monogenetic volcano from the Bakony-Balaton Highland Volcanic Field, Hungary
JF - CENTRAL EUROPEAN JOURNAL OF GEOSCIENCES
J2 - CENT EUR J GEOSCI
VL - 2
PY - 2010
IS - 3
SP - 362
EP - 384
PG - 23
SN - 2081-9900
DO - 10.2478/v10085-010-0019-2
UR - https://m2.mtmt.hu/api/publication/1384578
ID - 1384578
N1 - P23149
ATKI2010/0028
AB - Bondoró Volcanic Complex (shortly Bondoró) is one of the most complex eruption centre of Bakony-Balaton Highland Volcanic Field, which made up from basaltic pyroclastics sequences, a capping confined lava field (~4 km 2) and an additional scoria cone. Here we document and describe the main evolutional phases of the Bondoró on the basis of facies analysis, drill core descriptions and geomorphic studies and provide a general model for this complex monogenetic volcano. Based on the distinguished 13 individual volcanic facies, we infer that the eruption history of Bondoró contained several stages including initial phreatomagmatic eruptions, Strombolian-type scoria cones forming as well as effusive phases. The existing and newly obtained K-Ar radiometric data have confirmed that the entire formation of the Bondoró volcano finished at about 2.3 Ma ago, and the time of its onset cannot be older than 3.8 Ma. Still K-Ar ages on neighbouring formations (e.g. Kab-hegy, Agár-teto) do not exclude a long-lasting eruptive period with multiple eruptions and potential rejuvenation of volcanic activity in the same place indicating stable melt production beneath this location. The prolonged volcanic activity and the complex volcanic facies architecture of Bondoró suggest that this volcano is a polycyclic volcano, composed of at least two monogenetic volcanoes formed more or less in the same place, each erupted through distinct, but short lived eruption episodes. The total estimated eruption volume, the volcanic facies characteristics and geomorphology also suggests that Bondoró is rather a small-volume polycyclic basaltic volcano than a polygenetic one and can be interpreted as a nested monogenetic volcanic complex with multiple eruption episodes. It seems that Bondoró is rather a "rule" than an "exception" in regard of its polycyclic nature not only among the volcanoes of the Bakony-Balaton Highland Volcanic Field but also in the Neogene basaltic volcanoes of the Pannonian Basin.
LA - English
DB - MTMT
ER -
TY - CHAP
AU - Németh, Károly
ED - Canon-Tapia, E
ED - Szakacs, A
TI - Monogenetic volcanic fields: Origin, sedimentary record, and relationship with polygenetic volcanism
T2 - What is a volcano?
PB - Geological Society of America
CY - Boulder (CO)
SN - 9780813724706
T3 - Geological Society of America Special Paper ; 470.
PY - 2010
SP - 43
EP - 66
PG - 24
DO - 10.1130/2010.2470(04)
UR - https://m2.mtmt.hu/api/publication/1381671
ID - 1381671
AB - Monogenetic volcanism is commonly represented by evolution of clusters of individual volcanoes. Whereas the eruption duration of an individual volcano of a volcanic field is generally short, the life of the entire volcanic fi eld is longer than that of a composite volcano (e.g., stratovolcano). The magmatic output of an individual center in a volcanic field is 1–3 orders of magnitude less than that of a composite volcano, although the total field may be of the same volume as a composite volcano in any composition. These features suggest that the magma source feeding both monogenetic volcanic fields and composite volcanoes are in the same range. Monogenetic volcanic fields therefore are an important and enigmatic manifestation of magmatism at the Earth’s surface. The long eruption duration for an entire volcanic fi eld makes this type of volcanism important for understanding sedimentary basin evolution. Accumulated eruptive products may not be significant from a single volcano, but the collective field may contribute significant sediment to a basin. The eruptive history of volcanic fi elds may span millions of years, during which dramatic climatic and paleoenvironmental changes can take place. Through systematic study of individual volcanoes in a field, detailed paleoenvironmental reconstructions can be made as well as paleogeographic evaluations and erosion-rate estimates. Monogenetic volcanoes are typically considered to erupt only once and to be short-lived; recent studies, however, demonstrate that the general architecture of a monogenetic volcano can be very complex and exhibit longer eruption durations than expected. In this way, monogenetic volcanic fi elds should be viewed as a complex, longlasting
volcanism that in many respects carries the basic characteristics similar to those known from composite volcanoes.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Brand, B
AU - Clarke, A
AU - Semken, S
TI - Eruptive conditions and depositional processes of Narbona Pass Maar volcano, Navajo volcanic field, Navajo Nation, New Mexico (USA)
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 71
PY - 2009
IS - 1
SP - 49
EP - 77
PG - 29
SN - 0258-8900
DO - 10.1007/s00445-008-0209-y
UR - https://m2.mtmt.hu/api/publication/21081125
ID - 21081125
N1 - Cited By :25
Export Date: 11 November 2022
Correspondence Address: Brand, B.D.; School of Earth and Space Exploration, , Tempe, AZ 85287-1404, United States; email: bbrand@asu.edu
Funding details: National Science Foundation, NSF, EAR 0538125
Funding details: National Aeronautics and Space Administration, NASA
Funding details: Geological Society of America, GSA
Funding text 1: Acknowledgments We thank the Navajo Nation Minerals Department for permission to conduct field research at Narbona Pass. Anyone who wishes to conduct field investigations on the Navajo Nation must first apply for and receive a permit from the Navajo Nation Minerals Department in Window Rock, Navajo Nation, Arizona. We are especially grateful for the assistance of Cassandra Namingha in the field during summer 2005, and the steady support of Doris Bahee. Funding for this research was provided by a Geological Society of America Student Research Grant, an Arizona NASA Space Grant Consortium Student Fellowship, and the National Science Foundation, USA (EAR 0538125). The Division of Mathematics, Science, and Technology at Diné College, directed by Marnie Carroll, provided funding for C. Namingha’s participation. This paper greatly benefited from thorough, thoughtful, and insightful reviews by Greg Valentine, Larry Mastin, and from the associate editor James White. Ahéhee’ to all!
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Brand, BD
AU - Clarke, AB
TI - The architecture, eruptive history, and evolution of the Table Rock Complex, Oregon: From a Surtseyan to an energetic maar eruption
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 180
PY - 2009
IS - 2-4
SP - 203
EP - 224
PG - 22
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2008.10.011
UR - https://m2.mtmt.hu/api/publication/21081085
ID - 21081085
N1 - : General Assembly of the Interntional-Union-of-Geodesy-and-Geophysics
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Krochert, J
AU - Buchner, E
AU - Schmieder, M
AU - Maurer, H
AU - Walter, M
AU - Strasser, A
AU - Strasser, M
TI - Effusive melilititic volcanism on the Swabian Alb - the Sternberg volcano (Gomadingen)
JF - ZEITSCHRIFT DER DEUTSCHEN GESELLSCHAFT FÜR GEOWISSENSCHAFTEN
J2 - Z DTSCH GES GEOWISS
VL - 160
PY - 2009
IS - 4
SP - 315
EP - 323
PG - 9
SN - 1860-1804
DO - 10.1127/1860-1804/2009/0160-0315
UR - https://m2.mtmt.hu/api/publication/21081126
ID - 21081126
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Lindqvist, JK
AU - Lee, DE
TI - High-frequency paleoclimate signals from Foulden Maar, Waipiata Volcanic Field, southern New Zealand: An Early Miocene varved lacustrine diatomite deposit
JF - SEDIMENTARY GEOLOGY
J2 - SEDIMENT GEOL
VL - 222
PY - 2009
IS - 1-2
SP - 98
EP - 110
PG - 13
SN - 0037-0738
DO - 10.1016/j.sedgeo.2009.07.009
UR - https://m2.mtmt.hu/api/publication/21081274
ID - 21081274
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Németh, Károly
AU - Cronin, S J
TI - Phreatomagmatic volcanic hazards where rift-systems meet the sea, a study from Ambae Island, Vanuatu
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 180
PY - 2009
IS - 2-4
SP - 246
EP - 258
PG - 13
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2008.08.011
UR - https://m2.mtmt.hu/api/publication/1384782
ID - 1384782
N1 - Összes idézések száma a WoS-ban: 0
AB - Ambae Island is a mafic stratovolcano located in the northern Vanuatu volcanic arc and has a NE-SW rift-controlled elongated shape. Several hundred scoria cones and fissure-fed lava fields occur along its long axis. After many decades of quiescence, Ambae Island erupted on the 28th of November 2005, disrupting the lives of its 10,000 inhabitants. Its activity remained focused at the central (crater-lake filled) vent and this is where hazard-assessments were focused. These assessments initially neglected that maars, tephra cones and rings occur at each tip of the island where the eruptive activity occurred < 500 and < 300 yr B.P. The products of this explosive phreatomagmatic activity are located where the rift axis meets the sea. At the NE edge of the island five tephra rings occur, each comparable in size to those on the summit of Ambae. Along the NE coastline, a near-continuous cliff section exposes an up to 25 m thick succession of near-vent phreatomagmatic tephra units derived from closely spaced vents. This can be subdivided into two major lithofacies associations. The first association represents when the locus of explosions was below sea level and comprises matrix-supported, massive to weakly stratified beds of coarse ash and lapilli. These are dominant in the lowermost part of the sequence and commonly contain coral fragments, indicating that the loci of explosion were located within a reef or coral sediment near the syn-eruptive shoreline. The second type indicate more stable vent conditions and rapidly repeating explosions of high intensity, producing fine-grained tephra with undulatory bedding and cross-lamination as well as megaripple bedforms. These surge and fall beds are more common in the uppermost part of the succession and form a few-m-thick pile. An older tephra succession of similar character occurs below, and buried trees in growth position, as well as those flattened within base surge beds. This implies that the centre of this eruption was very near the coastline. The processes implied by these deposits are amongst the most violent forms of volcanism on this island. In addition, the lowland and coastal areas affected by these events are the most heavily populated. This circumstance is mirrored on many similar volcanic islands, including the nearby SW Pacific examples of Taveuni (Fiji), Upolu and Savai'i (Samoa), and Ambrym (Vanuatu). These locations are paradoxically often considered safe areas during summit/central-vent eruptions, simply because they are farthest from the central sources of ash-fall and lahar hazard. The observations presented here necessitate a revision of this view. © 2008 Elsevier B.V. All rights reserved.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Befus, KS
AU - Hanson, RE
AU - Lehman, TM
AU - Griffin, WR
TI - Cretaceous basaltic phreatomagmatic volcanism in West Texas: Maar complex at Pena Mountain, Big Bend National Park
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 173
PY - 2008
IS - 3-4
SP - 245
EP - 264
PG - 20
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2008.01.021
UR - https://m2.mtmt.hu/api/publication/21081178
ID - 21081178
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Coombs, DS
AU - Adams, CJ
AU - Roser, BP
AU - Reay, A
TI - Geochronology and geochemistry of the Dunedin Volcanic Group, eastern Otago, New Zealand
JF - NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
J2 - NEW ZEAL J GEOL GEOP
VL - 51
PY - 2008
IS - 3
SP - 195
EP - 218
PG - 24
SN - 0028-8306
UR - https://m2.mtmt.hu/api/publication/21081142
ID - 21081142
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Keating, GN
AU - Valentine, GA
AU - Krier, DJ
AU - Perry, FV
TI - Shallow plumbing systems for small-volume basaltic volcanoes
JF - BULLETIN OF VOLCANOLOGY
J2 - B VOLCANOL
VL - 70
PY - 2008
IS - 5
SP - 563
EP - 582
PG - 20
SN - 0258-8900
DO - 10.1007/s00445-007-0154-1
UR - https://m2.mtmt.hu/api/publication/21081128
ID - 21081128
LA - English
DB - MTMT
ER -
TY - CONF
AU - McClintock, M
AU - White, J D L
TI - The importance of the transport system in shaping the growth and form of kimberlite volcanoes.
T2 - 9th International Kimberlite Conference
PB - Goethe University Frankfurt
C1 - Frankfurt am Main
PB - Goethe University Frankfurt
PY - 2008
UR - https://m2.mtmt.hu/api/publication/21081336
ID - 21081336
N1 - Johann Wolfgang Goethe-University, Frankfurt, Germany
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Paredes, J.M.
AU - Colombo, F.
AU - Foix, N.
AU - Allard, J.O.
AU - Nillni, A.
AU - Allo, M.
TI - Basaltic explosive volcanism in a tuff-dominated intraplate setting, Sarmiento Formation (middle Eocene-lower Miocene), Patagonia Argentina
JF - Latin American Journal of Sedimentology and Basin Analysis
J2 - Latin Am. J. Sedimentol. Basin Anal.
VL - 15
PY - 2008
IS - 2
SP - 77
EP - 92
PG - 16
SN - 1669-7316
UR - https://m2.mtmt.hu/api/publication/33225979
ID - 33225979
N1 - Dpto. de Geología, Universidad Nacional de la Patagonia San Juan Bosco, Ruta Provincial No 1, Km. 4, 9005 Comodoro Rivadavia, Chubut, Argentina
Dpto. de Estratigrafía, Paleontología y Geociencias Marinas, Facultad de Geología, Universidad de Barcelona, 08028 Barcelona, Spain
CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Argentina
Cited By :12
Export Date: 11 November 2022
AB - The Sarmiento Formation (middle Eocene to early Miocene) represents the distal record of the activity of the Andean volcanic arc in central Patagonia, mainly dominated by accumulation and reworking of fine ash in a low-gradient continental setting. Intraplate volcanism takes place in the Golfo San Jorge Basin during the deposition of the Sarmiento Formation, and shallow intrusives and basaltic lava flows occurs. An exposure of basaltic volcaniclastic deposits was analyzed in the proximity of the Cerro Dragón intrusive rocks. These deposits consist of eight volcaniclastic lithofacies, organized in three distinct lithofacies association: volcaniclastic debris flow (lahar), base surge, and scoriaceous breccias of a strombolian-style eruption. Explosive volcanism is evidenced by the fallout of ballistic bombs over base surge and scoriaceous deposits, which produced bedding sags in the plastic lapilli. These deposits constitute the first published record of explosive volcanism (Strombolian) associated to the emplacement of the Oligocene alkaline volcanic rocks in the Golfo San Jorge Basin, generally considered as subintrusive or hypabissal intrusions.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Risso, C
AU - Németh, Károly
AU - Combina, AM
AU - Nullo, F
AU - Drosina, M
TI - The role of phreatomagmatism in a Plio-Pleistocene high-density scoria cone field: Llancanelo Volcanic Field (Mendoza), Argentina
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 169
PY - 2008
IS - 1-2
SP - 61
EP - 86
PG - 26
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2007.08.007
UR - https://m2.mtmt.hu/api/publication/1384532
ID - 1384532
N1 - Összes idézések száma a WoS-ban: 0
AB - The Plio-Pleistocene Llancanelo Volcanic Field, together with the nearby Payun Matru Field, comprises at least 800 scoria cones and voluminous lava fields that cover an extensive area behind the Andean volcanic arc. Beside the scoria cones in the Llancanelo Field, at least six volcanoes show evidence for explosive eruptions involving magma-water interaction. These are unusual in the context of the semi-arid climate of the eastern Andean ranges. The volcanic structures consist of phreatomagmatic-derived tuff rings and tuff cones of olivine basalt composition. Malacara and Jarilloso tuff cones were produced by fallout of a range of dry to wet tephra. The Malacara cone shows more evidence for a predominance of wet-emplaced units, with a steep slump-slope characterized by many soft-sediment deformation structures, such as: undulating bedding planes, truncated beds and water escape features. The Piedras Blancas and Carapacho tuff rings resulted from explosive eruptions with deeper explosion loci. These cones are hence dominated by lapilli tuff and tuff units, emplaced mainly by wet and/or dry pyroclastic surges. Carapacho is the only centre that appears to have started with phreatomagmatic eruptions, with lowermost tephra being rich in non-volcanic country rocks. The presence of deformed beds with impact sags, slumping textures, asymmetrical ripples, dunes, cross- and planar lamination, syn-volcanic faulting and accretionary lapilli beds indicate an eruption scenario dominated by excessive water in the transportational and depositional regime. This subordinate phreatomagmatism in the Llancanelo Volcanic Field suggests presence of ground and/or shallow surface water during some of the eruptions. Each of the tuff rings and cones are underlain by thick, fractured multiple older lava units. These broken basalts are inferred to be the horizons where rising magma interacted with groundwater. The strong palagonitization at each of the phreatomagmatic cones formed hard beds, resistant to erosion, and therefore the volcanic landforms are well-preserved. (C) 2007 Elsevier B.V. All rights reserved.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Downes, PJ
AU - Ferguson, D
AU - Griffin, BJ
TI - Volcanology of the Aries micaceous kimberlite, central Kimberley basin, Western Australia
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 159
PY - 2007
IS - 1-3
SP - 85
EP - 107
PG - 23
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2006.06.004
UR - https://m2.mtmt.hu/api/publication/21081131
ID - 21081131
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Gméling, Katalin
AU - Németh, Károly
AU - Martin, U
AU - Eby, N
AU - Varga, Zsolt
TI - Boron concentrations of volcanic fields in different geotectonic settings
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 159
PY - 2007
IS - 1-3
SP - 70
EP - 84
PG - 15
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2006.06.009
UR - https://m2.mtmt.hu/api/publication/1248805
ID - 1248805
AB - Whole rock boron and other mobile and immobile element concentrations
are reported for the alkaline maar volcanic rocks from the
Bakony-Balaton Highland Volcanic Field (BBHVF/Hungary) and for three
other geographically distinct maar volcanic fields from diverse
tectonic settings (Spain/Canary Islands, Tenerife; New
Zealand/Waipiata, Otago; and Mexico/Pinacate, Sonora and Ceboruco Cone
Field). Boron concentrations, along with other fluid immobile and
incompatible element concentrations are used to study the fluid
enrichment of the above mentioned intraplate volcanic materials. The
fluid addition was the highest in the Trans Mexican Volcanic Belt
(Ceboruco Cone Field), which is associated with recent subduction. The
BBHVF also shows high fluid enrichment. The average B content of the
Tenerife (Canary Islands) samples (6.4 mu g/g) is similar to that of
the BBHVF (6.9 mu g/g). The fluid enrichment is higher in the BBHVF
than in the Waipiata Volcanic Field (WVF). The magmatic source regions
for all the investigated volcanic rocks were affected by fluid
components to different degrees, and, despite the distant relationship
to subduction zones, all show evidence of a subduction-derived fluid
component. (c) 2006 Elsevier B.V. All rights reserved.
LA - English
DB - MTMT
ER -
TY - CONF
AU - Jahangiri, A Ashrafi N
TI - Transition from phreatomagmatic to strombolian eruptions in the Sahand volcano; constrain from pyroclastic studies
T2 - 25th Symposium on Geoscience
PB - Geological survey of Iran
C1 - Teherán
T3 - studies Proceeding of the 25th Symposium on Geoscience, Geological Survey of Iran, Tehran
PB - Geological survey of Iran
PY - 2007
UR - https://m2.mtmt.hu/api/publication/21081335
ID - 21081335
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Németh, Károly
AU - Martin, U
AU - Csillag, Gábor
TI - Pitfalls in erosion level calculation based on remnants of maar and diatreme volcanoes
JF - GEOMORPHOLOGIE
J2 - GEOMORPHOLOGIE
VL - 2007
PY - 2007
IS - 3
SP - 225
EP - 235
PG - 11
SN - 1266-5304
UR - https://m2.mtmt.hu/api/publication/1384537
ID - 1384537
N1 -
AB - Erosion estimates based on geometrical dimension measurements of eroded maar/diatreme volcanoes are useful methods to determine syn-volcanic surface level and syn-volcanic bedrock stratigraphy. However, such considerations on volcanic architecture should only be employed as a first-order approach to determine the state of erosion. We demonstrate, on both young and eroded maar/diatreme volcanoes, that establishing the volcanic facies architecture gives vital information on the environment in which the volcano erupted. In 'soft' rocks, maar volcanoes are broad and underlain by 'champagne glass'-shaped diatremes. In contrast, the crater wall of maar volcanoes that erupted through 'hard rocks' will be steep, filled with lacustrine volcaniclastic deposits and underlain by deep diatremes.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Weinstein, Y
TI - A transition from strombolian to phreatomagmatic activity induced by a lava flow damming water in a valley
JF - JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
J2 - J VOLCANOL GEOTH RES
VL - 159
PY - 2007
IS - 1-3
SP - 267
EP - 284
PG - 18
SN - 0377-0273
DO - 10.1016/j.jvolgeores.2006.06.015
UR - https://m2.mtmt.hu/api/publication/21081134
ID - 21081134
LA - English
DB - MTMT
ER -
TY - THES
AU - Downes, P
TI - Magmatic evolution, xenolith mineralogy, and emplacement history of the Aries micaceous kimberlite, central Kimberley Basin, Western Australia.
PY - 2006
SP - 195
UR - https://m2.mtmt.hu/api/publication/21083087
ID - 21083087
N1 - The Neoproterozoic (815.4 ± 4.3 Ma) Aries kimberlite intrudes the King Leopold Sandstone and the Carson Volcanics in the central Kimberley Basin, northern Western Australia. Aries is comprised of a N-NNE-trending series of three diatremes and associated hypabyssal kimberlite dykes and plugs. The diatremes are volumetrically dominated by massive, clast-supported, accidental lithic-rich kimberlite breccias that were intruded by hypabyssal macrocrystic phlogopite kimberlite dykes and plugs with variably uniform- to globular segregationary-textured groundmasses. Lower diatremefacies, accidental lithic-rich breccias probably formed through fall-back of debris into the vent with a major contribution from the collapse of the vent walls. These massive breccias are overlain by a sequence of bedded volcaniclastic breccias in the upper part of the north lobe diatreme. Abundant, poorly-vesicular to nonvesicular, juvenile kimberlite ash and lapilli, with morphologies that are indicative of phreatomagmatic fragmentation processes, occur in a reversely-graded volcaniclastic kimberlite breccia unit at the base of this sequence. This unit and overlying bedded accidental lithic-rich breccias are interpreted to be sediment gravity-flow deposits (including possible debris flows) derived from the collapse of the crater walls and/or tephra ring deposits that surrounded the crater. ... This Fe-enrichment may have resulted from Fe-Mg exchange with olivine during slow cooling of the peridotite host rocks. Textures reflecting the cooling history of some mantle xenoliths are preserved in the form of fine exsolution rods of aluminous spinel in diopside and zircon in rutile grains in aluminous spinel- and rutile-bearing serpentinised ultramafic xenoliths, respectively. These textures suggest nearly isobaric cooling of host rocks in the lithospheric mantle, and indicate that at least some aluminous spinel in spinel-facies peridotites formed through exsolution from chromian 4 diopside. Episodes of Fe-Ti-rich metasomatism in the spinel-facies Kimberley mantle are the likely source of high-Ti phlogopite-biotite + rutile and Ti, V, Zn, Ni-enriched aluminous spinel ± ilmenite associations in several ultramafic xenoliths. U-Pb SHRIMP 207Pb/206Pb zircon ages for one granite (1851 ± 10 Ma) and two serpentinised ultramafic xenoliths (1845 ± 30 Ma; 1861 ± 31 Ma) indicate that the granitic basement and lower crust beneath the central Kimberley Basin are at least Palaeoproterozoic in age. However, Hf-isotope analyses of the zircons in the ultramafic xenoliths suggest that the underlying lithospheric mantle is at least late Archaean in age.
References: http://theses.library.uwa.edu.au/adt-WU2007.0030/public/07references.pdf
Megjegyzés-21081333
University of Western Australia, Perth
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Wang, Y
AU - Chen, HZ
TI - Tectonic controls on the Pleistocene-Holocene Wudalianchi volcanic field (northeastern China)
JF - JOURNAL OF ASIAN EARTH SCIENCES
J2 - J ASIAN EARTH SCI
VL - 24
PY - 2005
IS - 4
SP - 419
EP - 431
PG - 13
SN - 1367-9120
DO - 10.1016/j.jseaes.2003.12.010
UR - https://m2.mtmt.hu/api/publication/21081135
ID - 21081135
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Németh, Károly
TI - The morphology and origin of wide craters at Al Haruj al Abyad, Libya: maars and phreatomagmatism in a large intracontinental flood lava field?
JF - ZEITSCHRIFT FÜR GEOMORPHOLOGIE
J2 - Z GEOMORPHOL
VL - 48
PY - 2004
IS - 4
SP - 417
EP - 439
PG - 23
SN - 0372-8854
UR - https://m2.mtmt.hu/api/publication/1384551
ID - 1384551
N1 - Összes idézések száma a WoS-ban: 0
AB - Al Haruj al Abyad is a Miocene to Holocene intracontinental alkaline basaltic volcanic field in Libya. A NNW-SSE trending vent alignment up to 70 km in length and 7 km in width consist of at least 120 vents. Present pyroclastic rocks indicate hot emplacement from Strombolian eruptions and Hawaiian lava fountains. Craters are up to 800 in in diameter and 100 in in depth surrounded by low rims of strongly welded scoriaceous tephra. Craters often undercut the syn-volcanic paleosurface closely resembling maar-structures. It is inferred that magmatic fragmentation of the uprising melt has changed to fragmentation driven by magma-water interaction leading to an enigmatic explosive eruption that has removed the top of the scoria cones or even producing maar-like depressions. Water may have gained access to the melt during decreasing magmatic discharge in the final stage of the eruptions and produced energetic phreatomagmatic explosive eruption that ripped of the top of the volcanic edifices.
LA - English
DB - MTMT
ER -
TY - JOUR
AU - Lorenz, V
AU - Suhr, P
AU - Goth, K
TI - Maar-Diatrem-Vulkanismus – Ursachen und Folgen. Die Guttauer Vulkangruppe in Ostsachsen als Beispiel für die komplexen Zusammenhänge. Maar-diatreme volcanism – causes and consequences. The Guttau Volcano Group in eastern Saxony as an example for the complex processes and relationships
TS - Maar-diatreme volcanism – causes and consequences. The Guttau Volcano Group in eastern Saxony as an example for the complex processes and relationships
JF - ZEITSCHRIFT FUR GEOLOGISCHE WISSENSCHAFTEN
J2 - Z GEOL WISSENSCHAFT
VL - 31
PY - 2003
IS - 4-6
SP - 267
EP - 312
PG - 46
SN - 0303-4534
UR - https://m2.mtmt.hu/api/publication/21082703
ID - 21082703
LA - German
DB - MTMT
ER -