DOI: 10.1002/2015GL066811
论文题名: Electrical resistivity image of the South Atlantic continental margin derived from onshore and offshore magnetotelluric data
作者: Kapinos G. ; Weckmann U. ; Jegen-Kulcsar M. ; Meqbel N. ; Neska A. ; Katjiuongua T.T. ; Hoelz S. ; Ritter O.
刊名: Geophysical Research Letters
ISSN: 0094-9537
EISSN: 1944-9268
出版年: 2016
卷: 43, 期: 1 起始页码: 154
结束页码: 160
语种: 英语
英文关键词: electrical conductivity
; magnetotelluric
; mobile belt
; Namibia
; passive continental margin
Scopus关键词: Magnetotellurics
; Seismic waves
; Wave propagation
; Continental margin
; Electrical conductivity
; Magnetotelluric
; Magnetotelluric data
; Namibia
; Neoproterozoic rocks
; Oceanic lithosphere
; Passive continental margin
; Electric conductivity
; continental margin
; Cretaceous
; crustal thickness
; electrical resistivity
; image analysis
; inverse analysis
; magnetotelluric method
; oceanic lithosphere
; P-wave
; Proterozoic
; shear zone
; upper crust
; wave velocity
; Atlantic Ocean
; Atlantic Ocean (South)
; Congo Craton
; Kaoko Belt
; Namibia
; Walvis Ridge
英文摘要: We present a deep electrical resistivity image from the passive continental margin in Namibia. The approximately 700 km long magnetotelluric profile follows the Walvis Ridge offshore, continues onshore across the Kaoko Mobile Belt and reaches onto the Congo Craton. Two-dimensional inversion reveals moderately resistive material offshore, atypically low for oceanic lithosphere, reaching depths of 15-20 km. Such moderate resistivities are consistent with seismic P wave velocity models, which suggest up to 35 km thick crust. The Neoproterozoic rocks of the Kaoko Mobile Belt are resistive, but NNW-striking major shear-zones are imaged as subvertical, conductive structures in the upper and middle crust. Since the geophysical imprint of the shear zones is intact, opening of the South Atlantic in the Cretaceous did not alter the middle crust. The transition into the cratonic region coincides with a deepening of the high-resistive material to depths of more than 60 km. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957727733&doi=10.1002%2f2015GL066811&partnerID=40&md5=41d2325e9a5834e4cc616f7841b4d14e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10500
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: GFZ German Research Centre for Geosciences, Potsdam, Germany
Recommended Citation:
Kapinos G.,Weckmann U.,Jegen-Kulcsar M.,et al. Electrical resistivity image of the South Atlantic continental margin derived from onshore and offshore magnetotelluric data[J]. Geophysical Research Letters,2016-01-01,43(1).