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Horseshoe Lights Mine, Peak Hill Goldfield, Meekatharra Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 25° 27' 14'' South , 118° 34' 17'' East
Latitude & Longitude (decimal): -25.45377,118.57144
GeoHash:G#: qekr4nm14
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate


The Horseshoe Lights deposit was discovered in 1946 by a prospector. From that time to 1987 it had various owners, 1988-1991 Barrick and 1992-1994 Sabminco when mining ceased. Up to this time it produced 300 000 oz of gold and 54 000 tonnes of copper. Silver is also found in minor amounts.

The mine is located 34 kilometres north of Peak Hill and 150 kilometres north of Meekatharra, on the western side of the Horseshoe Range (named after the shape it makes in the landscape).

The deposit is hosted by the palaeoproterozoic Glengarry Sub-Basin within the Nabberu Basin. Mineralisation is in the upper part of the Narracoota Volcanics of tholeiitic basalt grading up to Mg basalt. Below this is the Thaduna Greywacke of greywacke with subordinate mudstone, and an upper unit of sandstone, grit and conglomerate.

The top of the Narracoota Volcanic is weakly metamorphosed volcaniclastics of quartz-chlorite schist, quartz eye tuffs and altered volcanics, capped by a prominent 1-2 metre thick poorly bedded chert/banded iron formation, with magnetite, specular hematite, and gold associated with pyrite.

The intermediate host is a suite of green, fine grained quartz-chlorite schist, quartz-sericite,quartz-kaolin schist, quartz-eye schist, with scattered 1-10cm thick chert bands. The main orebody is a series of lenses and pods, fragmented by shearing, containing quartz-hematite-goethite gossan with an average width of 20 metres, 50-200 metres strike length and 50 metres thick. The gossan contains high gold, although below 100 metres chalcocite, digenite, and covellite is dominant, above the primary minerals of pyrite and lesser chalcopyrite. To the east and west are veins and blebs of chalcopyrite-pyrite in the footwall and hanging wall.

The ore body is an enriched gossanous zone, steep dipping, lens shaped series of shoots, with high gold grades at the centre of the body, decreasing towards the margins.



Mineral List


15 valid minerals.

Rock Types Recorded

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Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleoproterozoic
1600 - 2500 Ma



ID: 3184366
Paleoproterozoic sedimentary and volcanic rocks

Age: Proterozoic (1600 - 2500 Ma)

Stratigraphic Name: Glengarry Group

Comments: Naberru Basin

Lithology: Mafic volcanic rocks; basalt; greywacke,iron formation,shale,sandstone,conglomerate

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Paleoproterozoic
1600 - 2500 Ma



ID: 702879
Thaduna Formation

Age: Proterozoic (1600 - 2500 Ma)

Stratigraphic Name: Thaduna Formation

Description: Rift fill conglomerates, megabreccias and turbidites. Predominantly lithic sandstone, quartz wacke and intercalated siltstone and shale and subordinate dolomite.

Comments: sedimentary siliciclastic; argillaceous detrital sediment; synthesis of multiple published descriptions

Lithology: Sedimentary siliciclastic; argillaceous detrital sediment

Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia). [5]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page 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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mining Annual Review (1985): 41.
Mock, C., Elliott, B.G., Ewers, G.R. Lorenz, R.P. (1987) Gold Deposits of Western Australia, BMR, Datafile (MINDEP), Resource Deposit 3, Department of Primary Industries and Energy, Bureau of Mineral Resources Geology and Geophysics, Commonwealth Government of Australia, 1987.
Parker, T.W.H. and Brown, T. (1990) Horseshoe Gold-Silver Deposit, Geology of Mineral Deposits of Australia and Papua New Guinea, AusIMM (1990):14(1): 671-675.

 
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