Exploration for possible economic vein-style and structurally controlled gold which may have formed within Adelaidean bedrock sediments in an area located east and north of Manna Hill township was conducted using low cost remote sensing,...
Exploration for possible economic vein-style and structurally controlled gold which may have formed within Adelaidean bedrock sediments in an area located east and north of Manna Hill township was conducted using low cost remote sensing, geochemical and geophysical methods. During 2009, 2010 and 2014, reconnaissance soil sampling was undertaken using Innov-X portable XRF analytical equipment, when ~670, 833 and 1313 samples respectively were tested for a wide range of trace elements. No significant gold or other anomalism was detected in the mainly shallow alluvium-covered locations visited, where sampling precision was taken to a spacing of 100 m x 200 m or 150 m x 150 m. A consultant was engaged to review and interpret available regional geophysical data, and acting on his recommendation that more detailed coverage was needed for delineating the region of interest, licensee Panda Mining flew 8834.5 line km of new aeromagnetic / radiometric / DTM coverage across the Manna Hill Project acreage during April 2010, along north-south lines spaced 140 m apart, using a mean sensor height of 45 m above the ground surface. The remaining years of tenure were used to conduct ground follow-up at remote sensing and magnetic/radiometric anomalies that appeared to lie on interpreted fold and fault structural trends, with geological mapping and limited rock chip sampling (20 samples) undertaken. A late focus on the former Boomerang gold mine involved evaluation of the possibility of using sub-audio magnetotelluric and/or IP survey techniques to look for inferred extensions to lodes at that deposit, but no activity eventuated there before a decision was made to surrender the licence.
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