Annual report for EL 25692 High Black Range year ending 27 September 2010

Abstract

EL 25692 is located about 25 kilometres north of the Roper River, near the High Black Range. The tenement is entirely with Moroak Station. It has been explored by Tianda Resources (Australia) Pty Ltd for uranium and iron ore since being granted in September 2007. The outcrop lithology in the tenement is comprised mostly of Proterozoic Roper River Group sediments, being sandstone and siltstone of the Velkerri, Moroak Sandstone and Kyalla Members of the McMinn Formation. The Sherwin Ironstone Member is sometimes found between the Moroak and Kyalla Members, and was the focus of the iron ore search. During July 2010, geologists of both Tianda Resources (Australia) Pty Ltd and the consultancy, Terra Search Pty Ltd, worked on the tenement. Exploration was conducted with the assistance of Google Earth imagery, seeking out hilltops that might be ferruginized. Seventeen geochemical samples, about a hundred geological observation points and fourteen outcrops of Sherwin Ironstone Member were recorded. All locations were recorded on Garmin GPSs using GDA94 projection. Data files were exported from the GPSs and processed and displayed with Mapinfo. Magnetic susceptibility readings were made on fourteen rockchip samples and at another five outcrop locations. These determined the parameter to vary between 0.3 and 310 SI units in the Sherwin Ironstone, with the highest readings being associated with the highest iron concentrations. This variability in the parameter gives an impetus to use ground magnetic survey to assist in mapping the ironstone outcrop. ICP-OES analysis of the seventeen rockchip samples gave values in the range of 12.7% Fe (in ferruginised sandstone) up to a maximum of 48% in oolitic ironstone. The median grade was 36.6%. Phosphate concentrations were in the range of 0.03% up to 0.36% with a median of 0.09% P The fourteen outcrops of Sherwin Ironstone Member varied in area from less than 0.1Ha to a maximum of 39 Ha, with a median of 0.1Ha. They were located on or near the tops of hills comprised of Moroak Sandstone Member. In some cases, they were only about half a metre thick, while in one instance, it appeared to be about two metres thick. The outcrops are estimated to contain over two million tonnes of ironstone, of grade ranging from 30% to 48%. It is recommended that Tianda Resources (Australia) Pty Ltd retain as much of the tenement as possible. Future exploration should focus on finding additional Sherwin Ironstone outcrops, and in more fully determining the tonnage, grade and metallurgical qualities of the deposit.