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Yuinmery prospects, Youanmi, Sandstone Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 28° 34' 59'' South , 119° 53' 59'' East
Latitude & Longitude (decimal): -28.5833333333, 119.9


Located 8 km east north east of the former Youanmi township are a series of copper, gold, nickel and zinc prospects. Located 80 kilometres south-west of Sandstone and 5 kilometres north-east of the Youanmi mine.

Located in the Youanmi Greenstone Belt, a synclinal sequence of chloritised felsic tuffaceous rocks, sulphide bearing chert, gabbros, basalt and ultramafics.

The copper-gold is found in the felsic volcanics and platinum group elements- nickel in large layers of the mafic/ultramafic intrusive complex. Marston states hosted by chert, banded iron formation, felsic pyroclastic rocks, overlying metabasalt in a major synformal structure, with intruding metagabbro and granophyre. It contains widespread low grade pyrite-pyrrhotite-magnetite-chalcopyrite, disseminated and thin massive zones.

The Just Desserts prospect contains an estimated resource of over 1 million tonnes at 1.82% copper and 0.78 g/t gold. Other prospects include YC5, YC11, YC14, Augustus and A Zone. YC14 and A Zone show massive sulphide Cu-Au. A Zone which is 1.3 kilometres north of Just Desserts also contains zinc in the upper levels and copper-gold in the lower levels of the horizon. Large widths of low grade platinum-palladium has been discovered at the Constantine prospect at 0.49 g/t Pt and Pd, and 0.22% nickel. This is associated with massive sulphides in at least two horizons of a major layered mafic/ultamafic intrusive complex with a 13 kilometre strike length.

Mineral List


13 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

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The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Marston, R.J. (1979) Copper Mineralization in Western Australia. Mineral Resources Bulletin 13, Geological Survey of Western Australia, 208p. 

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