Annual and Final Report for EL 26687 Attack Creek for the period 24 October 2012 to 22 March 2013

Abstract

This report describes exploration activities during the tenure of EL 26687 (Attack Creek prospect). The tenement was granted on 24 October 2008 for a period of 6 years and comprised 96 blocks. A reduction of 24 blocks was made in October 2011 and another reduction of 36 blocks was made in October 2012. The Attack Creek prospect was a joint venture between Minemakers Australia Pty Ltd (MAPL) and Geotech International Pty Ltd. Exploration aimed at the discovery of economic phosphate deposits proximal to the Alice Springs-Darwin railway. Such deposits are known to occur in shallow marginal marine sediments at the eastern edge of the Georgina Basin and associated with a basement high at MAPL's Wonarah project located approximately 220 km to the east-southeast. The presence of economically significant phosphate mineralisation in the eastern Georgina Basin has yet to be established. The prospect is 80km east-northeast of Tennant Creek and 30km east of Stuart Highway and lies on the 1:250,000 HELEN SPRINGS SE53-11 and the 1:100,000 BRUNCHILLY 5760 map sheets. Land use is dominated by cattle grazing over generally flat to undulating land with elevations between 240-280m. The geology in the immediate area consists of Palaeoproterozoic Tomkinson Creek Group, a dominantly arenaceous sequence, particularly in the basal portions, with siltstone and shale more important in the upper portions. This stratigraphy is overlain by undeformed Middle Cambrian sedimentary rocks. Early Cambrian lithologies are represented by the Helen Springs Volcanics that consist of amygdaloidal tholeiitic basalt and a basal sandstone unit. The Middle Cambrian Gum Ridge Formation was deposited in shallow shelf epicontinental seas subject to episodic peritidal influence. Lithologies consist principally of limestone and associated phosphorite units. Field work comprised the collection and analysis of a total of 42 soil and 6 rock samples. No anomalous analytical results were returned. The tenement was relinquished as part of the rationalisation of the regional phosphate exploration joint venture with Geotech International.