Gravity survey in Arctic waters, 1991 (project ARCTIC'91)

The gravity survey was carried out in order to: a) investigate the crustal structure of the Lomonosov Ridge to elucidate its subsidence history, b) determine the nature of basement on the marginal plateaus Morris Jesup and Yermak c) obtain further data on the thickness of the oceanic crust to evaluate any dependence of crustal thickness with very slow spreading rate. Sample rate was 10 s, corresponding to 25 m to 150 m depending on ship's speed.

The following instruments were used: KSS 31/25 sea gravity meter. The geographical coverage is as follows: Marine gravity data covering the Amundsen Basin, the Lomonosov Ridge, the Gakkel Ridge, the Morris Jesup Rise, the Nansen Basin and Yermak Plateau . Data are available on request, but with special arrangement.