Data limitations on model complexity; 2-D gravity modelling with desk-top calculators

Abstract

Two-dimensional modelling for regional geophysical interpretation requires gravity data along profiles that are many tens of kilometres in length. The only data presently available for most of onshore Australia are from reconnaissance surveys using helicopter transport; for nearly all of the continental margins the only data are from surface ship traverses. Those data are sufficient to produce regional gravity maps that show major gravity features, gradients and trends.