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Inversion of gravity and magnetic data
over subglacial Lake Concordia, East Antarctica
By Irina Filina, Gale White Fellowship.
Abstract:
For this project airborne gravity and magnetic data and ice thickness from airborne radar sounding collected during 1999 - 2000 experiment over dome C of the East Antarctic ice sheet, are going to be used. This region includes Lake Concordia, which is one of the larger documented subglacial lakes. It lies beneath approximately three kilometers of the ice, but the depth of the basin occupied by this lake and geological structures beneath the lake are unknown. Airborne gravity data are going to be used to establish the water depth and possibly the thickness of sediments in Lake Concordia by solving the inverse problem of gravity. Also, it is proposed invert magnetic data to test a model of geological structure beneath Lake Concordia as a fault of arbitrary position and orientation, bounding two different rock units.
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