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Magnetotelluric study of the Earth's crust along the deep seismic reflection profile DEKORP 2-N

Magnetotelluric study of the Earth's crust along the deep seismic reflection profile DEKORP 2-N

Geologische Rundschau 79(3): 581-601

In 1986/1987, 53 magnetotelluric soundings were carried out along the deep seismic reflection line DEKORP 2-N crossing the Munsterland basin and the Rhenish Massif. Examination of the data suggests one-dimensional interpretation to be appropriate for the Munsterland sites and still reasonable as an approximation for the major part of the Rhenish Massif sites. In some cases, the data are disturbed by man-made noise, in particular at the northern border of the Rhenish Massif, or affected by static shift distortion effects evidencing small scale, near surface electrical conductivity inhomogeneities. One-dimensional modeling for undistorted stations reveals a good conductor at a depth of 6–8 km in the Munsterland basin and at a depth of 14–16 km in the Rhenish Massif, shallowing to the north. Thus far, earlier MT results for these regions are largely corroborated. Comparison with reflection seismic results shows the conductor of the Rhenish Massif to coincide fairly well with a poorly reflective zone in the middle crust associated with strong reflectors at its upper and lower boundaries.

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Accession: 019361144

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DOI: 10.1007/bf01879203

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