Electrical structure across a major ice-covered fault belt in Northern Victoria Land (East Antarctica)

Details Electrical structure across a major ice-covered fault belt in Northern Victoria Land (East Antarctica) Electrical structure across a major ice-covered fault belt in Northern Victoria Land (East Antarctica)

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110615a&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 10, CiteID L10615

Physics

Geophysics

Exploration Geophysics: Magnetic And Electrical Methods, Exploration Geophysics: Continental Structures (8109, 8110), Tectonophysics: Continental Tectonics-Extensional (0905), Tectonophysics: Continental Tectonics-General (0905)

Scientific paper

A Geomagnetic Depth Sounding profile was performed across the glaciated Rennick Graben and the adjacent fault-bounded terranes of northern Victoria Land in East Antarctica. Induction arrows analysis and a 2D inversion model provide a unique deep electrical resistivity window beneath these fault zones. The electrical resistivity break across the Lanterman Fault is apparently restricted to the upper crust, suggesting that this strike-slip fault may not represent a deep lithospheric suture. Further east, a westward-dipping conductor is traced to a depth of 40 km beneath the Robertson Bay Terrane. It may image a remnant of the paleo-Pacific oceanic plate, which subducted beneath the Bowers Terrane. Within the Wilson Terrane, the Rennick Graben is an upper-crust resistive block. The Rennick Graben lacks a deep crustal or upper mantle conductor, in contrast to several continental rifts. However, similar resistive lower crust underlies some other major strike-slip fault belts.

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