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- Zhang, Ping, et al.
(author)
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Electric resistivity structure of the Siljan impact region ( Sweden)
- 1988
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In: Journal of Geophysical Research. - 0148-0227 .- 2156-2202. ; 93:B6, s. 6485-6501
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Journal article (peer-reviewed)abstract
- Based on 65 magnetotelluric (MT) measuring stations, a cross section of the electric conductivity structure in the Siljan impact area, located in the central part of Sweden, is presented. Static shift effects due to local near-surface inhomogeneities are present in nearly all of the MT soundings.In an attempt to correct for near-surface distortions, average impedance data and distortion parameters were interpreted. Derived 2-D models show some coincidence with seismic reflection results and support an impact origin of the Siljan area. Fluid migration through the fractures generated by the impact is one possible explanation for the anomalously high conductivity within the upper crust
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