Paleoseismic investigations in the Kopili Fault Zone of North East India: Evidences from liquefaction chronology
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- 作者：Devender Kumar ; devender@ngri.res.in" class="auth_mail" title="E-mail the corresponding author ; D.V. Reddy ; Anand K. Pandey
- 关键词：Liquefaction ; Sand dyke ; Kopili Fault Zone ; NE India ; Paleoseismic events
- 刊名：Tectonophysics
- 出版年：2016
- 出版时间：2 April 2016
- 年：2016
- 卷：674
- 期：Complete
- 页码：65-75
- 全文大小：7070 K
文摘
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First report of seismogenic liquefaction signatures from the Kopili Fault Zone (KFZ) in Brahmaputra plains of NE India.
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The liquefaction chronology and paleoseismic events for the region are inferred from OSL and 14C dating of more than one and a half dozen liquefaction features.
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The time constraints on liquefaction features extending to past ~ 1000 years suggest occurrence of three large to great seismic events viz. (i) 250 ± 25 yr. BP, (ii) between 400 to 770 yr. BP and (iii) 900 ± 50 yr. BP, in addition to the known historical earthquakes of 1869 and 1943 in this region.