Publication Date:
2020-02-12
Description:
A Magnetotelluric (MT) field campaign was carried out in the SE Lower Saxony Basin, Germany, with the main goal of testing this method on imaging the regional Posidonia black shale sediments. Eightythree MT stations were deployed along a sixty-three kilometer long profile. Data was acquired successfully and we show examples of apparent resistivity and phase curves before and after remote reference processing. Also, in an attempt to correlate microscale with regional, macrosale electrical resistivity models, electrical resistivity measurements were made on a series of black shale samples from boreholes to study how electrical resistivity varies with different thermal maturity levels, organic carbon and mineral content, measurement orientation and water content. Results show that black shale conduct electrical currents highly anisotropic and that water content is a main controlling factor. So far, we cannot establish a simple correlation between electrical conductivity and intrinsic properties of black shale, like organic carbon, mineral composition, and thermal maturity.
Language:
English
Type:
info:eu-repo/semantics/conferenceObject
Format:
application/pdf
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