
%0 Journal Article
%A Sprigg, C. 
%A Stackler, W. F. 
%T SUBMARINE GRAVITY SURVEYS IN ST. VINCENT GULF AND INVESTIGATOR STRAIT, SOUTH AUSTRALIA, IN RELATION TO OIL SEARCH
%J The APPEA Journal
%D 1965/06/30
%V 5
%N 1
%P 168-178
%K 
%R https://doi.org/10.1071/AJ64029
%U https://www.publish.csiro.au/paper/AJ64029 
%X A total of 476 submarine and 307 coastal (beach) stations has been observed in and about St. Vincent Gulf and Investigator Strait. These were observed from the oceanographic vessel &apos;Saori&apos; by manned sea-floor diving chamber, and/or scuba-operated encapsuled meter. Location control was by theodolite fix as from the shore and/or by sextant fix.The survey has provided Bouguer gravity station data contourable on 1 milligal intervals with an estimated maximum error of &#xb1; 0.3 milligals in the more remote seaward situations (principally due to surveying), down to &#xb1; 0.1 in closer inshore situations.The survey hasdefined the principal structural elements in and about St. Vincent Gulf and Investigator Strait;defined the western margin of the Upper Proterozoic to Cambrian Adelaide Geosyncline;provided a more detailed understanding of coastal block-faulting about the western escarpment of the Mt. Lofty Ranges;defined a longitudinal series of gravitational maxima beneath the Orontes Platform which are predicted to relate primarily to Cambrian fold structures, and which are probably erosionally breached in the north;outlined the probable margin of the submarine portion of the Troubridge (Permian) infra-basin;located a gravitational cross-feature displaying a strong north-south gradient opposite Port Vincent that relates in part to the northern margin of the Troubridge Permian infra-basin, but which appears also to be a locus of transcurrent faulting displaying south-block-west movement;subdivided the St. Vincent Basin into two provinces via a north-west-south-east structure extending south-east from about Macintosh Bank. Possible faulting in this zone indicates downthrow to the north defining potential southern limits of deeper Tertiary basin development. 
