FURTHER-STUDIES ON THE FENNOSCANDIAN GRAVITY-FIELD VERSUS THE MOHO DEPTH AND LAND UPLIFT

Whether post-glacial rebound or/and crustal variation contributes to t he pattern of the Fennoscandian gravity field has been of great intere st to geoscientists. Previous numerical studies are based on different Moho maps, different global Earth gravity models and different isosta tic models of Pratt type, resulting in quite different conclusions. In this study, we use the improved Moho depth map of Korja et al. (1993) , the OSU91A Earth gravity model and a refined modeling of the Moho de pth contribution We conclude that not more than about 40% and 30% of t he Fennoscandian geoid and gravity depressions of the orders of -12m a nd -40 mGal might be caused by crustal thickening. leaving at least -6 m and -28 mGal to be adjusted in accordance with post-glacial rebound