Electromagnetic sounding experiments in the Schwarzwald central gneiss massif
Item
Title (Dublin Core)
en-US
Electromagnetic sounding experiments in the Schwarzwald central gneiss massif
Description (Dublin Core)
en-US
Geomagnetic and telluric pulsations were observed at nine stations, partially at the same time, and at two sites with additional recordings of variations. They occupied a 20 x 30 km2 area of high-grade metamorphism. There is a nearly perfect spatial uniformity of the magnetic variation field except for a small local anomaly attributable to the Rheingraben. The telluric field is highly polarized in a N47 ± 7W direction but with local differences in amplitude. In contrast, telluric phases are spatially uniform and, as a function of period, distinctly different for the N47W orientation of the telluric field (= "B-polarisation") and the N43E orientation (= "E-polarisation"). Telluric and magnetic observations are not explainable by one-dimensional (1-D) models for the Schwarzwald alone. Therefore a 2-D model is derived, comprising Schwarzwald and Rheingraben, which can account for the graben Z anomaly and the phase curves in both polarisations. An unscaled 1-D model is obtained from the telluric phases in E-polarisation and then a 2-D model for Schwarzwald and Rheingraben in E- and B-polarisation. This latter model allows the scaling of the 1-D Schwarzwald model and shows a thin conductive layer under the gneiss massif at a depth of 12 km with a conductance of 650 S.
ARK: https://n2t.net/ark:/88439/y056011
Permalink: https://geophysicsjournal.com/article/121
ARK: https://n2t.net/ark:/88439/y056011
Permalink: https://geophysicsjournal.com/article/121
Creator (Dublin Core)
Tezkan, B.
Subject (Dublin Core)
en-US
Geomagnetic and telluric time variations
en-US
Magnetotellurics
en-US
Geomagnetic deep sounding
en-US
Electric conductivity structure
en-US
Rheingraben
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Schwarzwald
en-US
Experiment
Publisher (Dublin Core)
en-US
Journal of Geophysics
Date (Dublin Core)
1987-11-05
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Peer-reviewed Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/121
Source (Dublin Core)
en-US
Journal of Geophysics; Vol 62 No 1 (1988): Journal of Geophysics; 109-118
2643-2986
2643-9271
Language (Dublin Core)
eng
Relation (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/121/83