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  • AGU (American Geophysical Union)  (2)
  • 1995-1999  (2)
Publikationsart
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  • 1
    facet.materialart.
    Unbekannt
    Hydrothermal circulation at the Cleft-Vance overlapping spreading center : results of a magnetometric resistivity survey (1998)
    AGU (American Geophysical Union)
    In:  Journal of Geophysical Research - Solid Earth, 103 (B6). pp. 12321-12338.
    Details
    Publikationsdatum: 2018-04-12
    Beschreibung: We report on a magnetometric resistivity sounding carried out in the overlapping spreading center between the Cleft and Vance segments of the Juan de Fuca Ridge. The data collected reveal a strong three dimensionality in the crustal electrical resistivity structure on wavelengths of a few kilometers. Areas of reduced crustal electrical resistivities, with values approaching that of seawater, are seen beneath the neovolcanic zones of both active spreading centers. We interpret these reduced resistivities as evidence of active hydrothermal circulation within the uppermost 1 km of hot, young oceanic crust.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1029/98JB00599
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 2
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    The Electrical Properties of a 2D Conductive Zone underneath the Juan de Fuca Ridge (1998)
    AGU (American Geophysical Union)
    In:  Geophysical Research Letters, 25 (19). pp. 3647-3650.
    Details
    Publikationsdatum: 2018-02-13
    Beschreibung: 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.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1029/98GL52807
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
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