Crustal structure in Central India from gravity and magnetotelluric data

被引：0
|
作者：
Das, L. K.
Naskar, D. C. [1 ]
Roy, K. K.
Majumdar, R. K.
Choudhury, K.
Srivastava, S.
机构：
[1] Geol Survey India, Cent Geophys Div, Kolkata 700016, W Bengal, India
[2] Geol Survey India, Marine Wing, Kolkata 700091, W Bengal, India
[3] Jadavpur Univ, Dept Geol Sci, Kolkata 700032, W Bengal, India
[4] AFPRO, Ranchi, Bihar, India
来源：
CURRENT SCIENCE | 2007年 / 92卷 / 02期
关键词：
earthquake; faults; gravity; lineaments; magnetotelluric data;
D O I：
暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The present gravity and magnetotelluric studies over a few selected transects in Central India show evidence of EW trending Palaeo-Proterozoic mantle activated rifting in the area contained between the Narmada North Fault (NNF) and Narmada South Fault (NSF). This rift was reactivated during the Neo-Proterozoic once again. After a great hiatus, left lateral movement along the NSF produced the NW-SE trending Gondwana basins in the Satpura horst region, along preexisting weak zones in the crust with dehydration of mantle rocks, south of NSF and associated upwarps. These are responsible for the many hot springs observed in the Tapti grabens and the Jabalpur earthquakes in the area. The last reactivation of NSF was seen in the Deccan volcanic episode.
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页码：200 / 208
页数：9
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