Annual report for EL 1345 for the period 16-3-77 to 15-3-78.

Abstract

EL 1345 is situated 60km southeast of Alice Springs and covers an area of 1164.6km2. The exploration licence is one of several held by UALS This report covers the first year of tenure. Exploration is focussed on sandstone-type uranium deposits in the Upper Devonian Undandita Member sandstone of the Amedeus Basin. Exploration techniques used are pattern drilling, downhole gamma logging, geochemical sampling and radon surveys. These techniques are being used to locate redox boundaries in the sub-surface sandstone where uranium mineralization may occur. In the second year of tenure more detailed work has been recommended. EL 1345 was flown during the course of a detailed regional airborne spectrometric survey. A Cessna 206, chartered from Skycharter Aviation of Perth was used in conjunction with a Scintrex Gam-2 spectrometer connected to four Scintrex GDSA-64 temperature stabilized detectors with a volume of 7420cm3. Flight line spacing was 500m, altitude l00m and survey speed 185km/hr. A total of 89 north-south flight lines were flown. This involved 14 hrs 18 mins of flying covering a total of 1,914 line-km. Seven days were spent surveying the area. No significant anomalies were found. Hole spacing was l,000m on north-south lines and 5,000m on east- west lines. The purpose of the drilling was to outline redox boundaries in the Undandita Member sandstone. If still in Tertiary at a depth of l5m, the holes were stopped. If reduced sandstone was encountered the hole spacing was narrowed to 250m. SPAT readings were made on all dust samples taken over one metre intervals. All the vacuum drillholes were logged with a McPhar TV-S downhole logger. No significant anomalies were located. From the bottom of each hole and SPAT anomalous intervals 154 dust samples were collected for uranium analysis. The assays ranged from 1.1 - 8.2 ppm. The assays were made by the Australian Atomic Energy Commission in Sydney using the neutron activation method. Track-Etch cups were placed in all the vacuum drillholes at a standard depth of 5m. These were exposed for 30 days before shipment to Terradex Corporation, California, U.S.A. No results are available as yet.