Late Pleistocene-Holocene paleoseismology of the Batang fault (central Tibet plateau, China)
作者： Xuemeng Huang , Yi Du , Zhongtai He , Baoqi Ma , Furen Xie
DOI: 10.1016/J.GEOMORPH.2015.03.026
关键词: Plateau 、 Fault (geology) 、 Alluvial fan 、 Holocene 、 Seismology 、 Fault scarp 、 Paleoseismology 、 Quaternary 、 Geology 、 Pleistocene
摘要: Abstract The Yushu segment of the Ganzi–Yushu fault system (central Tibet plateau) is mainly composed by and Batang fault. 2010 Ms 7.1 earthquake occurred on fault, causing huge loss lives widespread damages to densely populated area. So far, much effort has been devoted surface rupture paleoseismology while late Quaternary activity not received attention. a clear geomorphic expression with scarps, sag ponds, push-ups, systematic offset fluvial terraces, alluvial fans along its trace. Integrated methods geomorphological mapping, outcrop analysis, trench excavation logging, optically stimulated luminescence (OSL), radiocarbon ( 14 C) dating are employed study latest Pleistocene Holocene Several paleoearthquakes identified from stratigraphic evidence between 22 ka after 2.7 ka. oldest event (E1) 22 ka BP, E2 prior 14 ka BP, E3 within 9.5 ka BP, E4 8.0–7.8 ka BP, E5 6.7 ka BP, penultimate (E6) 4.3–4.0 ka BP, most recent (E7) 2.7 ka BP. average recurrence interval for about 2000 a in last ~ 8 ka BP, relapse time paleoearthquake
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