Geophysical Journal | 2008 volume 30 1

The state, results and prospect of tectonomagnetic studies in the West Antarctica

© Maximchuk V.Yu., Bahmutov V.G., Gorodyskiy Yu M., Chobotok I.A.

The results of long-term (1998-2005) tectonomagnetic investigations in the Western Antarctic near the location of Ukrainian Antarctic Station "Academic Vernadsky" are reviewed. The peculiarities of Earth's anomalous magnetic field and its dynamic temporal variations (tectonomagnetic anomalies) were studied on the founded here tectonomagnetic polygon. Nearly Argentine Archipelago were determined intensive tectonomagnetic effects up to -2,8 nT/year. Their spatial-temporal structure agreed with tectonic structure elements. After theoretical computations with considerations of geological and geophysical data it was concluded, that the nature of such effects was caused by a piezomagnetic effect under the influence of stretching tectonic forces (few bars per year) in sub-latitudinal direction. Perspectives of tectonomagnetic investigations in the region are discussed.

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