80% coverage south 22-1/D53-1/3

25% coverage south west 22-3/D53-5/3-5

The Alice Springs Town Basin is a small alluvial basin with a surface of approximately three square miles. It contains a maximum thickness of seventy-five feet of fluviatile sediment, deposited by the Todd and Charles Rivers. The lithology of the sediments is correlated with their postulated environments of deposition. The environments are alluvial fan, main graded channels, levee banks, flood plains, and back swamps. The occurrence of groundwater in the various types of sediments is discussed. Contour maps of the piezometric surface, have been constructed for October 1957 and October 1961. Within this period there has been a fall in the surface of between three and ten feet. The interpretation of the results of aquifer performance tests on bores 28 and 110 gave mutually consistent values for the aquifer constants within the zones of high permeability. The average values are T = 20,000 gallons per day per foot and S = 0.05. The constants computed for the test on bore 59/11 are inconsistent with the assumption of an isotropic, homogeneous aquifer.

area c E53/B1-50 Contour interval: 10

Lower Cretaceous strata of the Calvert Hills 1:250,000Sheet area were examined during the 1961 field season. Field observations of lithologies and their sequences together with the collection of fossils and their identification provided material for this Record. Fossil content and field observations suggest that Mesozoic sediments on the Calvert Hills 1:250,000 Sheet area were deposited in distinct environments at three different times in the Lower Cretaceous

Mesozoic strata of the Bauhinia Downs 1:250,000 Sheet area were examined during the 1960 field season when observations were made on lithology and palaeogeography, and Lower Cretaceous fossils were collected at fourteen localities. Results of field observations have been recorded in Skwarko (1961a, b) and these, together with results of detailed examinations of fossils and the close dating of strata provide material for the present paper. Of the fourteen assemblages of fossils listed from the Bauhinia Downs 1:250,000 Sheet area seven are marine, six non-marine and one inconclusive. They range in age from Neocomian to Aptian.

Legacy product - no abstract available

Legacy product - no abstract available

22-1/F53-3/3

This Record describes a geophysical survey, using mainly electromagnetic methods, made over the Rum Jungle Creek and Rum Jungle Creek South prospects. The purpose of the survey was to test a suggestion that the existence of strong electromagnetic anomalies might be an indirect guide in prospecting for deposits of uranium minerals in the Rum Jungle district. The test was successful, in that strong electromagnetic anomalies were observed close to the known uranium ore body at Rum Jungle Creek South prospect.