The boundary between stable and unstable shelf in Iraq as inferred from using ideal gravity to elevation ratio

摘要

The line of complete compensation, the ideal value for the ratio of gravity to elevation (-0. 11 mGal/m) in Iraq, is obtained using gravity data derived from 477 stations. This line is found to separate the stable shelf from unstable shelf. It is also confirmed with the western limit of the basin as shown on the structural map that is constructed at the base of Al-Fath (L-Fars) formation (M. Miocene). The obtained line coincides with the thinnest crustal line shown on the crustal thickness map of Iraq. It is believed that this line may also define the thinnest sedimentary cover in Iraq. The obtained result can be a useful template for a tectonic view of Iraq.