TY  - JOUR
AU  - Kovács, János
AU  - Szabó, Péter
AU  - Kocsis, László
AU  - Vennemann, T
AU  - Sabol, M
AU  - Gasparik, Mihály
AU  - Virág, Attila
TI  - Pliocene and Early Pleistocene paleoenvironmental conditions in the Pannonian Basin (Hungary, Slovakia): Stable isotope analyses of fossil proboscidean and perissodactyl teeth
JF  - PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
J2  - PALAEOGEOGR PALAEOCL
VL  - 440
PY  - 2015
SP  - 455
EP  - 466
PG  - 12
SN  - 0031-0182
DO  - 10.1016/j.palaeo.2015.09.019
UR  - https://m2.mtmt.hu/api/publication/2958148
ID  - 2958148
N1  - Megjegyzés-25243093
Hiányzó Jelleg: 'JOUR\n\nArticle'
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AB  - Stable carbon and oxygen isotope values of structural carbonate (δ13C, δ18OCO3) and phosphate (δ18OPO4) in bio-apatite were measured for fossil mammalian teeth from Slovakia and Hungary. Oxygen isotope compositions of enamel provide new quantitative records of the Pliocene and Early Pleistocene paleoclimate in the Pannonian Basin (PB). The δ18OPO4 values were used to study the temporal variations in the oxygen isotope compositions of precipitation and the changes in temperature over the PB. The new O-isotope data suggest that surface air temperatures between 4.5 and 2.0Ma were 1 to 4°C warmer with about 700mm/yr more precipitation compared to the present. C-isotope analyses of samples from proboscideans (Anancus sp., Mammut sp.) and perissodactyls (Stephanorhinus sp., Tapirus sp.) from the Pliocene (MN15-MN16) and Early Pleistocene (MN17) suggest that they were primarily C3 browsers. The mean δ13C value is high at 4.5 to 3.7Ma (MN14-15) during the Pliocene Warm Period and decreases at about 3.5 to 3.0Ma (MN16; mid-Pliocene Warm Period), with the onset of more humid conditions in Europe. The δ13C values return to higher values from 2.5Ma onwards (MN17), most likely reflecting more arid conditions as a consequence of the onset of the Northern Hemisphere glaciation. © 2015 Elsevier B.V.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Kocsis, László
AU  - Ozsvárt, Péter
AU  - Becker, D
AU  - Ziegler, R
AU  - Scherler, L
AU  - Codrea, V
TI  - Orogeny forced terrestrial climate variation during the late Eocene-early Oligocene in Europe
JF  - GEOLOGY
J2  - GEOLOGY
VL  - 42
PY  - 2014
IS  - 8
SP  - 727
EP  - 730
PG  - 4
SN  - 0091-7613
DO  - 10.1130/G35673.1
UR  - https://m2.mtmt.hu/api/publication/2724538
ID  - 2724538
AB  - Terrestrial climatic data reflect variable and often conflicting responses to the global cooling event at the Eocene-Oligocene transition (ca. 34 Ma). Stable isotopic compositions of the tooth enamel of large, water-dependent, herbivorous terrestrial mammals are investigated here to better understand the European continental climate during the late Eocene-early Oligocene. High delta O-18(PO4) and delta C-13 values reflect a semiarid climate and ecosystem in the late Eocene. In the west-southwest region of Europe, these conditions prevailed until at least 33 Ma, after which it became more humid. A similar change was recorded north of the Alpine thrust, but it occurred 2 m.y. earlier. The north and west-southwest regions show a significant offset in delta O-18(PO4) composition between 35 and 31 Ma, indicating the influence of different air trajectories with different moisture sources (Atlantic versus Tethys). This also marks the presence of an orographic height in central Europe from the latest Eocene. After 31 Ma, a large drop in delta O-18(PO4) is registered, explained by altitude-induced fractionation on meteoric water isotopic composition. The related paleoaltitude change is estimated to be 1200 m, and the uplift could have taken place along the Alpine-Dinaridic orogenic system.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Kocsis, László
TI  - Geochemical compositions of marine fossils as proxies for reconstructing ancient environmental conditions
JF  - CHIMIA
J2  - CHIMIA
VL  - 65
PY  - 2011
IS  - 10
SP  - 787
EP  - 791
PG  - 5
SN  - 0009-4293
DO  - 10.2533/chimia.2011.787
UR  - https://m2.mtmt.hu/api/publication/3189091
ID  - 3189091
AB  - A brief summary is given here about some of the geochemical methodologies that are often used to obtain information from fossils and sediments about the past environment. Such methods are frequently applied in our project in which the formation of Paleogene phosphate sequences in North Africa is investigated. These layers were deposited in shallow marine seas during a period of extreme warm climate with a high CO 2 concentration in the atmosphere. Some of the characteristics of this greenhouse interval are similar to the modern anthropogenic situation hence it is intensively investigated from several aspects by many scientists. Here the geochemical compositions of fossils deposited during this time are discussed, focusing on how the data are obtained and how they could be evaluated in terms of palaeo-environmental conditions. © Schweizerische Chemische Gesellschaft.
LA  - English
DB  - MTMT
ER  -