Friday, 31 August 2007 - 11:20 AM
5.A.B-3

Japanese-German joint airborne geophysical surveys around Syowa Station, Antarctica

Yoshifumi Nogi1, Daniel Steinhage2, Kazuya Kitada3, Sven Riedel2, Wilfried Jokat2, Kazuyuki Shiraishi1, and Kazuo Shibuya1. (1) NIPR, 1-9-10 Kaga, Itabashi, Tokyo, 173-8515, Japan, (2) Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Bremerhaven, 27568, Germany, (3) Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan

The area around Syowa Station, the Japanese Antarctic wintering Station in Lützow- Holm Bay, is considered to be a junction of Africa, India, Madagascar, and Antarctic continents from the reconstruction model of Gondwana. Therefore this area is a key to investigate the formation and fragmentation of Gondwana. To reveal the tectonic evolution related to Gondwana formation and breakup in this area, joint Japanese-German airborne geophysical surveys around Syowa Station had been conducted in January 2006 during the 47th Japanese Antarctic Research Expedition. Ice radar, magnetic, and gravity data are obtained onshore and offshore areas using the AWI owned, Dornier aircraft (Polar-2) and the outline of the results are presented. Several characteristic features possibly related to the tectonic evolution of Gondwana are inferred from magnetic and gravity anomaly maps. The tectonic evolution in this area are discussed.

[Manuscript]