The Electrical Properties of a 2D Conductive Zone underneath the Juan de Fuca Ridge.

Jegen, Marion and Edwards, R. N. (1998) The Electrical Properties of a 2D Conductive Zone underneath the Juan de Fuca Ridge. Open Access Geophysical Research Letters, 25 (19). pp. 3647-3650. DOI 10.1029/98GL52807.

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Abstract

Vertical gradient electromagnetic sounding (VGS) on the Endeavour segment of Juan de Fuca mid‐ocean ridge reveals the presence of a 2D ridge‐parallel, conductivity anomaly. If the anomaly is caused mainly by melt in a conventional upper mantle upwelling zone alone, then the conductivity of the zone is about 0.6 S/m. The corresponding Archie's law melt fraction exceeds 0.10. A significantly lower melt fraction requires a sheet‐like, well interconnected melt. Upwelling zone conductivity can be reduced by a third if the anomaly is broadened and a crustal conductor is added to the model.

Document Type: Article
Keywords: Exploration Geophysics; instruments and techniques; marine geology; geophysics; magnetic and electrical properties; tectonophysics; rheology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/98GL52807
ISSN: 0094-8276
Date Deposited: 12 Dec 2012 09:49
Last Modified: 13 Feb 2018 13:11
URI: http://oceanrep.geomar.de/id/eprint/19653

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