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Tower Hill Gold Mine, Leonora, Leonora Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 28° 54' 14'' South , 121° 19' 32'' East
Latitude & Longitude (decimal): -28.90396,121.32542
GeoHash:G#: qdy78f4qp
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate


A gold-silver mine started in 1984. Produced 1 million tons of ore at 3.24 grams/ton Au (1984)(13,671 ounces Au & 2,068 oz. Ag).

The mine is on the south-west outskirts of the Leonora town site. It was operational intermittently from 1897 onwards, with peak production from 1905 to 1911. A local Leonora syndicate worked it from 1979 to 1982. Late 1982, Forrest Gold Pty Ltd (a subsidiary of CRA) took out an option, with mining commencing in November 1983, and a new plant erected in early 1984. CRA sold the mine in 1987, with ownership eventually passing to Dominion Mining Ltd in 1989.

Active open pit mining occurred between 1986 to 1992, Plutonic Resources purchased the mine from Dominion Mining Ltd, then Sons of Gwalia purchased the mine in 1995.

The Tower Hill mine is located in the Sons of Gwalia Shear Zone. At Tower Hill from the base up is granitoid; ultramafic schist with minor molybdenite and porphyry inclusions; mafic schist after dolerite and basalt with minor sediments and quartz-chlorite-fuchsite-sericite; same as prior zone with additional minor andalusite-rich zones and shale; and lastly felsic schist.

The ore body strikes for 150 metres Gold at Tower Hill is found in milky quartz veins, associated with tetrahedrite. The gold is rarely visible. Other species found at the site include pyrite, chalcopyrite, molybdenite, bismuthinite, argentian gold and arsenopyrite. The gold is found in several sub-parallel quartz veins with a strike length of 600 metres and 45 degrees easterly dip.


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


16 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

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

Archean
2500 - 4000 Ma



ID: 904373
ultramafic and minor mafic rocks 74475

Age: Archean (2500 - 4000 Ma)

Description: Tremolite-chlorite-talc amphibolite, metapyroxenite, pyroxenite, peridotite, serpentinite, ultramafic schists, komatiite, high-Mg basalt; also chalcedony, silica, jasper, silcrete, silica cap rock on ultramafic rocks

Comments: igneous ultramafic intrusive; meta-igneous ultramafic volcanic; synthesis of multiple published descriptions

Lithology: Igneous ultramafic intrusive; meta-igneous ultramafic 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]

Neoarchean - Mesoarchean
2500 - 3200 Ma



ID: 3188638
Archean volcanic and intrusive 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]

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):367, 373
Vearncombe, J.R. (1992), Archaean Gold Mineralisation in a Normal Motion Shear Zone at Harbour Lights Leonora Western Australia, Mineralium Deposita, Vol 27 (3), pp 182-191, June 1992
Layman, L., Fitzgerald, C. (2011), 110 Degrees in the Waterbag: a history of life work and leisure in Leonora Gwalia and the northern goldfields, W.A. Museum/ Leonora Historical Research Project, 2011

External Links


 
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