A gravity survey was conducted by Mines Administration Pty Limited for The Papuan Apinaipi Petroleum Company Limited between May and August 1959. The survey took place over seven separate areas within Authority to Prospect 54P in north-western Queensland. The areas surveyed are partly within the Georgina Basin and partly within the Diamantina Basin. These Basins contain Palaeozoic sedimentary rocks. Sedimentary rocks of the Great Artesian Basin overlap the whole of the Diamantina Basin and part of the Georgina Basin.
The survey results, together with data obtained previously by the Bureau of Mineral Resources, indicated four distinct zones of gravity "highs" which all trend northnorth-west. Most and perhaps all of these zones coincide in the north with structural features in the Proterozoic sediments. The gravity anomalies associated with these Proterozoic structural features continue southward, where the Proterozoic rocks' are overlain by later sediments, with little or no decrease in absolute gravity. In some areas these Proterozoic structural features have influenced structural development in the Palaeozoic and Cretaceous sediments. The four zones of gravity "highs" are therefore regarded as areas of structural interest that are worthy of further exploration.