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Mount Shea gold prospect, Woolibar Station (Hampton Plains Goldfield), Kalgoorlie-Boulder Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 30° 55' 10'' South , 121° 35' 2'' East
Latitude & Longitude (decimal): -30.91968,121.58399
GeoHash:G#: qdw2nenzb
Locality type:Prospect
Köppen climate type:BSh : Hot semi-arid (steppe) climate


Mount Shea is approximately 15 kilometres south of Kalgoorlie and 3 kilometres east of the Kalgoorlie-Kambalda Road. The deposit is similar to Hannans South, which is further north, listed under the Kalgoorlie Mindat heading. The Mount Shea area also includes the Rogan Josh and Dalray prospects which will be listed separately. Some historic gold mines are mentioned under the Feysville Mindat heading.

The reference studied five skarns associated with the Mount Shea intrusive complex. They are oxidised endoskarns, replacing faulted and fractured quartz monzodiorite-granodiorite. The ore bodies are up to 140 metres long and 40 metres thick.

The Mount Shea prospect consists of massive, net textured, and breccia skarns, showing multistage epidote, actinolite, albite, magnetite (5%), with minor biotite, calcite and quartz. Gangue and magnetite are in equilibrium with Co-Ni pyrite and chalcopyrite.

The Mount Shea stock-dyke-sill complex post dates the regional D1 folding, and metamorphism, and D2 strike slip faulting. The suite is calc-alkaline, consisting of hornblende-plagioclase monzodiorite, quartz monzodiorite, granodiorite and quartz plagioclase tonalite porphyry.

The Cu-Au epidote skarns are cut by biotite-albite-dolomite schist, and by red biotite-albite replacement bands. Post skarn alteration includes 20 metre thick zones of sericite-chlorite-ankerite schist, confined to two D3 reverse faults. The schists are mineralised with magnetite, pyrite and chalcopyrite, with up to 0.62 Cu and 1.6 g/t Au.

Red sericite alteration is marked by magnetite, hematite and pyrite in fractured porphyry. The biotite-sericite alteration, and oxidised mineral assemblage is linked to the magnetite-hematite bearing gold lode.





Mineral List

Mineral list contains entries from the region specified including sub-localities

13 valid minerals.

Rock Types Recorded

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Rock list contains entries from the region specified including sub-localities

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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

Neoarchean - Mesoarchean
2500 - 3200 Ma



ID: 3187518
Archean volcanic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: Greenstone belt; mafic-ultramafic volcanic rocks

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]

Archean
2500 - 4000 Ma



ID: 723862
felsic volcanic and volcaniclastic rocks 74288

Age: Archean (2500 - 4000 Ma)

Description: Quartz-feldspar (meta-) porphyry, porphyritic microgranite; rhyolite, dacite, rhyodacite, andesite; agglomerate, breccia tuff; felsic schist; felsic volcanic and volcaniclastic rocks; dacite and rhyodacite tuff; dacite porphyry;

Comments: igneous volcanic; igneous felsic volcanic; synthesis of multiple published descriptions

Lithology: Igneous volcanic; igneous felsic volcanic

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


Localities in this Region
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Australia

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

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Mueller, A.G. (2007), Copper-Gold Endoskarns and High Mg Monzodiorite and Tonalite Intrusions at Mt Shea Kalgoorlie Australia : implications for the origin of gold-pyrite-tennantite mineralization in the Golden Mile, Mineralium Deposita, October 2007

 
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