Thursday, 30 August 2007
4.PS-96
Broadband Seismic Array Deployments and Crust - Upper Mantle Structure around the Lützow-Holm Bay Region, East Antarctica
Masaki Kanao1, Yusuke Usui2, Tomofumi Inoue3, and Akira Yamada3. (1) Polar Data Center, National Institute of Polar Research, 1-9-10 Kaga, Itabashi-ku, Tokyo, Japan, (2) Transdisciplinary Research Integration Center, Research Organization of Information and Systems, 1-9-10 Kaga, Itabashi-ku, Tokyo, 173-8515, Japan, (3) Geodynamics Research Center, Ehime University, Bunkyo-cho 2-5, Matsuyama, Ehime, Japan
Broadband seismic array deployments have been carried out from 1996 on the coastal outcrops in the Lützow-Holm Bay Region (LHB), East Antarctica. The recorded teleseismic and local seismic signals have sufficient quality for the various analyses to clarify the dynamics and heterogeneous structure of the crust and upper mantle. Conventional passive source studies such as receiver functions and shear wave splitting were carried out; indicating heterogeneous structure from the north to the south along the coast in LHB.Data obtained may be applied not only to lithospheric studies, but to study of the Earths deep interior by integration with large span arrays from Eastern Dronning Maud Land. The broadband array deployments in LHB could make effective contributions to the ‘Global Alliance of Regional Networks;GARNET’, principle international Antarctic Array programs, together with ‘POLEr observation NETwork; POLENET’ during IPY 2007-2008.