气候变化领域集成服务门户(CCPortal): Constraints on the configuration of Andaman-Nicobar Subduction zone from EM modeling

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DOI	10.1016/j.tecto.2020.228575
	Constraints on the configuration of Andaman-Nicobar Subduction zone from EM modeling
	Anusha E.; Arora K.; Nagarajan N.; Azeez K.K.A.
发表日期	2020
ISSN	00401951
卷号	792
英文摘要	The electrical conductivity structures, using Long period Magneto Telluric data at three sites: NBG (Nabagram) & HAV (Havelock) in Andaman and CBY (Campbell Bay) in Nicobar region are investigated. After obtaining 1D responses, 2D forward models of electrical structure are constructed along profiles across North Andaman, Middle Andaman and Nicobar Islands. The initial configuration along each profile is constrained from models based on seismic reflection data. The responses obtained after iterative forward computations match the observed data at respective sites reasonably well. New structures within the forearc high are discerned: from north to south we delineate a moderately conductive body beneath North Andaman, which is associated with the presence of ophiolites around this location, in the Middle Andaman, a highly conductive body below the island is interpreted as presence of fluids along the active Diligent Fault, facilitated by the barrier of the Invisible Bank. A complex geometry of resistive material embedded in a highly conductive body inferred beneath at Great Nicobar at CBY is commensurate with the presence of a layered magmatic body, possibly linked to the volcanic seamount to the east, near the tear of the subducting plate. © 2020 Elsevier B.V.
关键词	Accretionary sediments Andaman-Nicobar subduction zone Conductivity structure Continental crust
英文关键词	Geophysics; Physics; Complex geometries; Conductive bodies; Electrical conductivity; Electrical structures; Forward computation; Initial configuration; Seismic reflection data; Volcanic seamounts; Barium compounds; accretionary prism; continental crust; electrical conductivity; fault zone; magnetotelluric method; plate tectonics; seismic reflection; subduction zone; Andamans and Nicobars; India; Hepatitis A virus
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207706
作者单位	CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad, 500007, India
推荐引用方式 GB/T 7714	Anusha E.,Arora K.,Nagarajan N.,et al. Constraints on the configuration of Andaman-Nicobar Subduction zone from EM modeling[J],2020,792.
APA	Anusha E.,Arora K.,Nagarajan N.,&Azeez K.K.A..(2020).Constraints on the configuration of Andaman-Nicobar Subduction zone from EM modeling.Tectonophysics,792.
MLA	Anusha E.,et al."Constraints on the configuration of Andaman-Nicobar Subduction zone from EM modeling".Tectonophysics 792(2020).