Results and perspectives of tectonomagnetic investigations in the Western Antarctic

Abstract

The results of long-term (1998-2005 yrs.) tectonomagnetic investigations in the Western Antarctic near the location<br />of Ukrainian Antarctic Station «Academic Vernadsky» are reviewed. The peculiarities of the Earth’s<br />anomalous magnetic field and its dynamic temporal variations (tectonomagnetic anomalies) were studied using<br />the newly founded tectonomagnetic polygon. Near the Argentine Archipelago intensive tectonomagnetic effects<br />up to -2.8 nT/year were determined. Their spatial-temporal structure agrees with tectonic structure elements. We<br />suggest that the nature of such effects is caused by a piezomagnetic effect under the influence of stretching tectonic<br />forces (few bars per year) in sub-latitudinal direction. Perspectives of tectonomagnetic investigations in the<br />region are discussed.

Keywords

• tectonomagnetic anomaly – geodynamics – stretching tectonic forces