Three dimensional electrical structure of the crust and upper mantle in Ordos Block and adjacent area: Evidence of regional lithospheric modification.
Dong, H., W. Wei, G. Ye, S. Jin, A.G. Jones, J. Jing, L. Zhang, C. Xie, F. Zhang, and H. Wang, 2014.
Long period magnetotelluric (MT) data from project SINOPROBE were acquired and modeled, using three-dimensional (3D) MT inversion, to study the electrical
structure of Ordos Block, a component of the North China Craton.
For the first time a high resolution 3D resistivity model of the lithosphere is defined for the region.
Contrary to what would be expected for a stable cratonic block, a prominent lithospheric conductive complex is revealed extending from the upper mantle to the
mid-to-lower crust beneath the northern part of Ordos.
Correlating well with results of seismic studies, the evidence from our independent magnetotelluric data supports
regional modification of the lithosphere under the north Ordos and lithosphere
thinning beneath Hetao Graben.
The abnormally conductive structure may result from
upwelling of mantle material in mid-to-late Mesozoic beneath the northern margin of
the Ordos block.
Geochemistry, Geophysics, Geosystems, 15, doi:10.1002/2014GC005270. [PDF]
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Alan G Jones / 25 June 2014 /