Seafloor Depth Of George Vi Sound, Antarctic Peninsula, From Inversion Of Aerogravity Data

George VI Sound is an similar to 600 km-long curvilinear channel on the west coast of the southern Antarctic Peninsula separating Alexander Island from Palmer Land. The Sound is a geologically complex region presently covered by the George VI Ice Shelf. Here we model the bathymetry using aerogravity data. Our model is constrained by water depths from seismic measurements. We present a crustal density model for the region, propose a relocation for a major fault in the Sound, and reveal a dense body, similar to 200 km long, flanking the Palmer Land side. The southern half of the Sound consists of two distinct basins similar to 1,100 m deep, separated by a -650 m-deep ridge. This constricting ridge presents a potential barrier to ocean circulation beneath the ice shelf and may account for observed differences in temperature-salinity (T-S) profiles.