The regional background in gravimetric problems
© Krasovsky S.S., Krasovsky A.S.
The experience of gravity modelling of the Earth's crust clearly shows the tendency of the blocks to isostatic balance of differently deep inhomogeneities. In this plan, the wide domains of the gravity field are first of all associated with structural and compositional features of the upper Earth's crust but not with deep factors. Therefore the regional background is first of all caused by near-surface and not by deep bodies. In this context it is practically expedient not to subdivide formally the observed field into a regional and residual component but to model, at least in a generalized manner, all known or appropriately assumed features of the study medium.