TARGET: Possible shallowly buried, igneous intrusive-related epithermal or hydrothermal gold and base metal deposits in the Lake Labyrinth - Earea Dam region, north and west of Kingoonya. EXPLORATION: Acquisition of aerial magnetic and...
TARGET: Possible shallowly buried, igneous intrusive-related epithermal or hydrothermal gold and base metal deposits in the Lake Labyrinth - Earea Dam region, north and west of Kingoonya. EXPLORATION: Acquisition of aerial magnetic and radiometric surveys, geophysical image processing and interpretation, prospect gridding, detailed gravity and magnetic surveys, geological mapping, rock chip sampling and trenching, and gold analysis of stored bedrock samples from previous CRA exploration in the South Lake tin mine area, plus the same for samples of stored drill core from Abadon Holdings drillhole 73DH1A (SML 680). Inclined diamond drilling (2 holes totalling 353.5 m) tested a 2.75 mGal gravity / 4000 nT magnetic anomaly at Lake Labyrinth West. RESULTS: Elevated neodymium values (max 206 ppm) were recorded from a layered complex of pegmatite - veined, carbonate/chlorite - altered, andesitic alkali basalt units cored in the second of the diamond holes (DD88ME2). As well as the volcanics, an underlying sequence of veined and potassic - altered peridotite and dolerite dykes was penetrated, which is believed to be volumetrically sufficient for causing the observed coincident geophysical anomaly at Lake Labyrinth West. Only trace sulphide mineralisation was observed in the drill core, and drill sample assays gave no significant base or precious metal values, although marked Cr, Co, Ni and Cu element depletion was evident in two sheared and strongly altered intervals of basalt found to be anomalous in Ba, Ce and La. Examination of the Mount Eba airborne geophysical survey data revealed no other significant anomalies requiring drill testing. Additional ground magnetic, gravity and Sirotem surveys carried out at the South Lake prospect metamorphosed Archaean BIF sequence gave no encouragement to the search for possible hydrothermal gold mineralisation or buried, shear-hosted massive base metal sulphides. Lastly, a reportedly Archaean metabasic rock unit at Hopeful Hill was geochemically sampled, but returned no assays of note.
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