Paleostress analysis of Cenozoic faulting in the Kraishte area, SW Bulgaria
作者： Alexandre Kounov , Jean-Pierre Burg , Daniel Bernoulli , Diane Seward , Zivko Ivanov
DOI: 10.1016/J.JSG.2011.03.006
关键词: Seismology 、 Graben 、 Transtension 、 Tectonics 、 Paleogene 、 Geology 、 Fault (geology) 、 Sedimentary basin 、 Paleontology 、 Cenozoic 、 Basement (geology)
摘要: Abstract Paleostress calculations from fault planes in Paleogene sediments and the underlying basement were used to determine orientation chronology of principal stresses during Cenozoic tectonic evolution Kraishte area (southwest Bulgaria). The results show that middle Eocene–early Oligocene WSW–ENE extension led formation grabens half filled with thick continental marine deposits hanging wall extensional detachments. their then intruded by subvolcanic bodies dykes SW–NE between 32 29 Ma. These stages are related general rollback Hellenic slab. From late earliest Miocene, SSE–NNW transtension generated coal-bearing sedimentary basins. anticlockwise rotation main tensile axis almost 50° respect previous stage was probably a switch Aegean back-arc crustal stretching extrusion fragments around Moesian platform. Since Miocene area, accommodated faults relatively small displacement, restricted basins alluvial lacustrine deposits.
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