3d gravity inversion of the Cheshire Basin
A. Abdoh, D. Cowan and M. Pilkington
Journal name: Geophysical Prospecting
Issue: Vol 38, No 8, November 1990 pp. 999 - 1011
Info: Article, PDF ( 794.81Kb )
Three-dimensional inverse gravity modelling is used to determine the structure of the Carboniferous sediments underlying the Jurassic and Permo-Triassic formations in the Cheshire Basin. The gravity effect of the Jurassic and Permo-Triassic rocks was first removed from the observations and the resulting residual gravity field was then inverted to map variations in depth of the Carboniferous formations. The inversion technique is performed in the frequency domain, enabling rapid computation of solutions for large gridded data sets. Evaluation of results shows that there is good agreement between calculated and observed values, with interpreted depths to the base of the Carboniferous in excess of 6 km. Gravity inversion results also delineate areas of faulting on the south-western and eastern edges of the basin.