Independent component analysis of Australian-wide-array geomagnetic data

点击翻译按钮获取中文摘要

Employed the Australian-wide geomagnetic array data, we investigated the mechanism of the outstanding power spectrum density of geomagnetic variation corresponding to M2 tide observed at Alice Springs, central Australia, and estimated 3-D electrical conductivity profile in the uppermantle beneath entire Australian continent after elimination of the tidal effect. A distribution of the large geomagnetic power spectrum density corresponding to M2 tide is consistent with the land surface conductivity distribution rather than periodic current distribution. The upper mantle conductivity model beneath Australian continent clearly revealed the geological terrains, in particular Yilgarn and Pilbara Cratons.