
TY  - JOUR
A1  - Sprigg, C. 
A1  - Stackler, W. F. 
T1  - SUBMARINE GRAVITY SURVEYS IN ST. VINCENT GULF AND INVESTIGATOR STRAIT, SOUTH AUSTRALIA, IN RELATION TO OIL SEARCH
JF  - The APPEA Journal
JO  - The APPEA Journal
Y1  - 1965
VL  - 5
IS  - 1
SP  - 168
EP  - 178
KW  - 
UR  - https://doi.org/10.1071/AJ64029 
N2  - 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. 
ER  -

