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GEOPHYSICAL RESEARCH LETTERS,
VOL. 34,
L09315,
5 PP., 2007
doi:10.1029/2007GL029412
Electrical resistivity image of the Jingsutu Graben at the NE margin of the Ejina Basin (NW China) and implications for the basin development
Department of Applied Geosciences, Technical University Berlin, Berlin, Germany
Department of Applied Geosciences, Technical University Berlin, Berlin, Germany
Department of Applied Geosciences, Technical University Berlin, Berlin, Germany
Department of Applied Geosciences, Free University Berlin, Berlin, Germany
Department of Applied Geosciences, Free University Berlin, Berlin, Germany
Department of Applied Geosciences, Technical University Berlin, Berlin, Germany
Magnetotelluric and transient electromagnetic data reveal the Graben geometry of a NNE striking depression within crystalline basement at the NE margin of the Ejina Basin. We interpret this structure as a Late Mesozoic pull-apart basin, which is delineated by NNE-striking normal faults to the east and west. Satellite imagery, SRTM elevation data and previously published geophysical data of our work group suggest that the Graben is part of normal-fault system that continues at least 140 km farther to the south, thus forming the eastern margin of the Ejina Basin. NNE striking normal faults are atypical in a regional context, where NW striking and ENE striking fault systems prevail. Thus, this feature marks a distinct difference of the Ejina Basin when compared to other basin structures in the China-Mongolia border region.
Received 19 January 2007; accepted 6 April 2007; published 10 May 2007.
Citation: (2007), Electrical resistivity image of the Jingsutu Graben at the NE margin of the Ejina Basin (NW China) and implications for the basin development, Geophys. Res. Lett., 34, L09315, doi:10.1029/2007GL029412.
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