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Wallaby Gold Mine (Just In Case), Mount Weld Station, Laverton Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 28° 51' 7'' South , 122° 18' 6'' East
Latitude & Longitude (decimal): -28.85189,122.30176
GeoHash:G#: qdygz59mt
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate


Open-pit gold mine.
Operated by Barrick Ltd.

The Granny Smith gold deposit was discovered by Ray Smith in 1979. An open pit was developed and processing plant erected. Once the Granny Smith Mine was abandoned, other nearby ore-bodies were developed to feed the processing plant. Wallaby is 23 kilometres south of Laverton, 11 kilometres west of Granny Smith, on the eastern edge of the Lake Carey saltpan. Just-in-Case is the southern extension of the mine. These started as an open-pit but this ceased in 2006, and has continued as an underground operation.

The mine lies in the Laverton Tectonic Zone, of major north-south shears and associated faults. Gold is associated with structurally controlled dilatant sites on a major north north-west trending, easterly dipping, brittle-ductile shear zone.

At Wallaby/Just-in-Case there are three lodes, which are sub-horizontal to flat, south-east dipping, and sub-parrallel. The ore body has a 400 metres strike length, and at least a 600 metres down dip. The main lode is surrounded by numerous less continuous sub-parrallel and cross link zones. There are two granitic intrusions in the mineralised zone. Gold is also found here where they are cut by the lodes, although it is disseminated and a lower grade. The ore zone is hosted by a 1200 metre series of Archaean matrix supported polymict conglomerates. This is covered by 15 to 70 metres of lake sediments.


Commodity List

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


Mineral List


29 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

Quaternary
0 - 2.588 Ma



ID: 898340
lunette dunes 72955

Age: Pleistocene (0 - 2.588 Ma)

Description: Quartz and gypsum dunes and mounds (kopi); may include minor silt, sand, gravel, and clay flats adjacent to playas; locally includes some playa sediments

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: 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)
Mueller, A.G., Hall, G.C., Nemchin, A.A., Stein, H.J., Creaser, R.A., and Mason, D.R. (2008): Archean High-Mg Monzodiorite–syenite, Epidote Skarn, and Biotite–sericite Gold Lodes in the Granny Smith–Wallaby District, Australia- U–Pb and Re–Os chronometry of two intrusion-related hydrothermal systems. Mineralium Deposita (2008):43: 337-362.

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