Twin Hills and Mount Gunyan silver deposits

Abstract

The Twin Hills and Mt Gunyan deposits are located approximately 230 km SW of Brisbane. The Twin Hills deposit (-28.85°, 151.26°) is approximately 8 km east of Texas, with Mt Gunyan a farther 4.5 km north-east of Twin Hills. The 2010 JORC Resource for Twin Hills Vias 9.5 Mt grading 53.8 g/t Ag for 16.4 Moz of contained silver at a cut-off grade of 26.5 g/t Ag, with an Inferred Mineral Resource for Mt Gunyan of 2.3 Mt grading at 69 g/t Ag for 5.19 Moz of silver. Twin Hills and Mt Gunyan were discovered during regional exploration to locate further silver mineralisation proximal to the significant Silver Spur deposit. The deposits lie within the Silver Spur beds, contained within the Early Permian Silver Spur Basin, whid1 unconformably overlies the Carboniferous Texas beds (Donchak et nl, 2007).