Diatremes cut through the Triassic carbonate platforms in the Dolomites? Evidences from and around the Latemar, northern Italy

Nemeth, K [Németh, Károly (Vulkanológia, sze...), szerző]; Budai, T [Budai, Tamás (Geológia), szerző] Talajtani és Klimatológiai Tanszék (működött: 2... (PTE / TTK / KTI)

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: EPISODES 0705-3797 32 (2) pp. 74-83 2009
  • SJR Scopus - Earth and Planetary Sciences (miscellaneous): Q1
    Widespread volcanism associated with Middle Triassic carbonate platforms is well known, and in many cases referred as a partial cause of the disruption of platform development due to burial by volcanic material. It is no doubt that silicic explosive volcanism produced large volume of volcanic material accumulated in basins surrounding the carbonate platforms (Buchenstein basins) alternating with pelagic carbonates of basin facies. There are large numbers of mafic eruptive products associated with individual carbonate platforms such as the Latemar in the Dolomites in northern Italy. These eruptive products are dominated by mafic dyke swarms which due to their more erodable nature provide a characteristic castle-like architecture of the present day edifice, having altered mafic dyke material eroded away between more resistant limestone and dolomite pillars. Here we present field evidences to demonstrate that there are characteristic zones of volcaniclastic vertical breccia horizons more consistent with diatreme origin. In many occasions, such volcanic breccia pipes and associated tilted blocks were used for demonstrating the casual relationship between tectonic event-generated collapsed carbonate platform units and accumulation of volcanic material in the resulting basins. Here we concur with this idea, and provide field evidences that such volcanic breccia pipes are rather exposed volcanic conduits, resulted from magma and water interaction driven diatreme formation. This finding from the Latemar in northern Italy highlights the need of revision of the cause and consequences of different types of volcanism in the final episodes of the carbonate platform evolution in the Triassic of the Tethys.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2021-05-13 11:49