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Randalls, Mount Monger Goldfield, Kalgoorlie-Boulder Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 31° 5' 11'' South , 122° 5' 28'' East
Latitude & Longitude (decimal): -31.08654,122.09122
GeoHash:G#: qdqz4kb5g
Köppen climate type:BSh : Hot semi-arid (steppe) climate


The Randalls area is 36 kilometres east north-east of Kambalda, 60 kilometres east of Kalgoorlie, and 8 kilometres east of the Mount Monger pastoral station homestead. It is accessed by continuing east along the Mount Monger Road, which ends at the mines.

Randalls is a number of small open pits, underground mines and prospects with various names other than Randall. Integra began purchasing leases in the Aldiss area to the east from 2003, then Randalls from Solomon in 2005. Finally the Salt Creek lease was purchased in 2009.

A processing facility was constructed here, purchased from the New Celebration Gold Mine, and a small/deep open pit was opened at the Salt Creek deposit in 2010. Presently (2013) there are open pits at Salt Creek, Maxwells, and Majestic, with an underground mine at Cock-Eyed Bob. In 2013 Integra Mining, merged with Silver Lake Resources, which controlled the neighbouring Mount Monger leases.

The area is underlain to the east by mafic/ultramafic rocks of the Bulong Anticline, of fine grained chloritic basalt, and to the west by the Mount Belches Beds, an Archaean sequence of siltstone, mudstone, sandstone, greywackes and banded iron formations. The western section contains the major north-south trending Bare Hill Shear Zone.

Gold mineralisation within the Mount Belches Beds is restricted to the banded iron formations. These form a relatively narrow line trending east-west, however zigzagging wildly north-south along the route. Gold is hosted in magnetite-grunerite rich banded iron formation, often close to shallow south-west dipping quartz veins.

The banded iron formations show light chevron folding. The Santa mine is on the most north-east antiformal structure, Rumbles and Maxwell is on the central antiformal structure. In the Bare Hill Shear Zone, these north-west orientated, north-east dipping, overturned light folds change to north orientated, and east dipping overturned isoclinal folds.


Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

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!

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

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: 759016
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: 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]

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


Localities in this Region
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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)
Steadman, J. A., Large, R. R., Davidson, G. J., Bull, S. W., Thompson, J., Ireland, T. R., & Holden, P. (2014). Paragenesis and composition of ore minerals in the Randalls BIF-hosted gold deposits, Yilgarn Craton, Western Australia: Implications for the timing of deposit formation and constraints on gold sources. Precambrian Research, 243, 110-132.

External Links


 
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