文章基本信息

标题：Electrical signatures of the Earth’s crust in central India as inferred from magnetotelluric study
本地全文：下载
作者：G. Dhanunjaya Naidu ; K. Veeraswamy ; T. Harinarayana 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2011
卷号：63
期号：12
页码：1175-1182
DOI：10.5047/eps.2011.08.004
出版社：Springer Verlag
摘要：The tectonic scenario of the Narmada-Son Lineament (NSL) zone has been the subject of debate for the last few decades.It is characterized tectonically as a highly-disturbed zone in Indian geology since Precambrian times.A magnetotelluric (MT) study has been carried out across the NSL zone along a 270-km-long N-S-trending traverse, extending from Hoshangabad in the North to Ner in the South.As a part of the present study, 25 magnetotelluric soundings have been collected and the data rotated to N70°E after removing local distortions, arising from 3D galvanic effects, using the Groom-Bailey decomposition technique.2-D inversion has been carried out using an NLCG scheme.The results derived from the 2-D inversion have brought out the highly conductive nature of the mid-lower crust at places coinciding with the known faults.The significant high heat flow and seismicity in the region associated with these faults may be caused by tectonic activity and the highly conductive nature of the mid-lower crust.This may be due to the partial melting of subsurface rocks resulting from the high temperature caused by mantle upwarping in the region.The results are also compared with the gravity and a nearby Deep Seismic Sounding (DSS). Key words Magnetotellurics deep crust Narmada-Tapti region electrical conductivity seismotectonics.
关键词：Magnetotellurics ;deep crust ;Narmada-Tapti region ;electrical conductivity ;seismotectonics