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Evanston Gold Mine, Diemals Station, Menzies Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 29° 44' 39'' South , 119° 28' 50'' East
Latitude & Longitude (decimal): -29.74419,119.48067
GeoHash:G#: qdsyyc5pt
Locality type:Mine
KΓΆppen climate type:BSh : Hot semi-arid (steppe) climate


Evanston was only discovered in 1937, by prospector Arthur Charles Evans. The remote location, lack of water, and overlying alluvium cover hid the deposit for a period of forty years after many of the other locations in the Eastern Goldfields were discovered.

The Evanston mine has an estimated JORC resource remaining of 735 000 tonnes of ore at 3.6 g/t yielding 85 000 ounces of gold.

Soon after the discovery the deposit was acquired by the three Ridge brothers of Kalgoorlie. In two years they had extracted over 100 000 pounds worth of gold. Up to 65 men were employed. A five head battery, ball mill, engine, cyanide plant and concentrating table were all erected. The lode dips gently then remains flat at the 100 foot level. Much of the early mining was at the Hanging Wall, which later in the 1940's caved in.

The total the brothers produced to 1943 was 48 125 tonnes of ore for 25 848 ounces of gold. Western Mining Corporation had drilling options on the leases early on.

The mine was then taken over by the Commonwealth government in 1943. During the war years the Australian government took over several mines it viewed as important for national security, however it is unclear how a gold mine could fit into this category, unless they were selling the metal to the enemy. Between 1943 to 1945 the mine was on care and maintenance.

Evanston Gold NL was floated in Adelaide in 1945 to take over the leases, 18 in total amounting to 200 acres. The leases contained several shafts down to 100 metres, and a sand dump of 50 000 tonnes worth 6 dwt. The main lode was rich in parts, but parallel reefs found were generally of low value to sub-economic. The ore has a high arsenic content. Gold is found in lenses, covering a length of over 1 kilometre.
Free gold is found in ironstone, with the country rock being sedimentary strata overlaying fine grained greenstone, the shear striking north-west to south-east, 8 to 10 feet wide.

The company entered the realm in a blaze of publicity, everyone keen to see life return to normal after the war. The company lasted until 1948, when the receivers were called in.

A collection of 1987 photographs in the State library shows a small processing plant at the mine, prospectors shack, old shafts, various building ruins, old machinery, and a sand pile which appeared to be in the process of re-treating.

Sometime after this three shallow pits were developed on the oxide ore. The mine is about 5 kilometres south of the Evanston-Bullfinch, and Evanston-Menzies road junction, and borders the first road on its east.


Commodity List

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


Mineral List


10 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

Quaternary
0 - 2.588 Ma



ID: 703599
colluvium 38491

Age: Pleistocene (0 - 2.588 Ma)

Description: Colluvium and/or residual deposits, sheetwash, talus, scree; boulder, gravel, sand; may include minor alluvial or sand plain deposits, local calcrete and reworked laterite

Comments: regolith; synthesis of multiple published descriptions

Lithology: Regolith

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: 3187519
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]

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)
Fisher, N.H., Olive, L.C. (1945), Report on Maintenance Evanston Gold Mine, Department of National Development/Bureau of Geology and Geophysics, Record 1945/051, Commonwealth of Australia, 1945
Coolgardie Miner newspaper (1946), Evanston Gold Mine Developing Well, 02/08/1946
The Argus newspaper (Melbourne) (1946), Evanston Gold Mine Interests W.A., 14/06/1946
Kalgoorlie Miner newspaper (1948), Evanston Gold, 05/10/1948
Kalgoorlie Miner newspaper (1940), Evanston Yields 100 000 pounds Worth of Gold, 17/09/1940
The Southern Cross Times newspaper (1938), Mt. Jackson. Evanston Leases, 19/03/1938

External Links

http://www.bullseyemining .com.au/irm/content/johnston-range-iron-gold.aspx

 
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