PseudomalachiteYudnamutana Mine, Yudnamutana District, North Flinders Ranges, Flinders Ranges, South Australia, Australia
Photo: crocoite.com Latitude: 30°10'36"S
Longitude: 139°16'45"E
One of the main mines in the Yudnamutana District the Yudnamutana mine (also known as the Yuda mine) was worked intermittently for copper. Started around 1862, work was abandoned in 1867, then picked up by the Flinders Copper Mining Company (No. 1 Workings) and worked between 1914 and 1918.
The lode channel worked in the mine is a shear and breccia zone striking almost north-south, with a steep easterly dip across the trend of the host rocks. The crush material consists of shattered and brecciated country rock with irregular veins of quartz and much hematite. Hematite forms the matrix of the breccia in places. Malachite occurs in patches and coatings on fractured rock.
The lode has been opened up via a vertical stope with drives and cross-cuts. The outcrop of the lode follows the ridgeline of a small hill and at its peak an open cut has been excavated with an adit going into the side of the hill to intersect the open cut.
Tremolite is mentioned in the Catalogue of SA minerals under the "Yuda mine", which is in fact the "Yudnamutana mine". According to the description, the mineral occurs in the regional rock (actinolitic marbles) around the copper mine.
Mineral List
8 entries listed. 6 valid minerals.
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References
- Record of the Mines of South Australia, H.Y.L. Brown, Government Geologist, published by the South Australia Government Printer 1908, 4th edition pp 157-159. (reprinted in 1985)
- Coats, R. P. and Blissett, A. H. (1971): Regional and Economic Geology of the Mount Painter Province, Geological Survey of South Australia Bulletin, 43. pp 354-359
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