|Latitude & Longitude (WGS84):||31° 31' 57'' South , 119° 40' 21'' East|
|Latitude & Longitude (decimal):||-31.53257,119.67255|
|Köppen climate type:||BSk : Cold semi-arid (steppe) climate|
40km SE of Southern Cross
The Yilgarn Star Gold Mine is approximately 20 kilometres south-east of Marvel Loch, and 5 kilometres east of the Great Victoria Mine, opposite which is the access road. The mine is a large narrow west north-west to east south-east trending open pit, with apparently underground workings. The mullock plateau is directly north of the pit.
Located in the brittle-ductile Yilgarn Star Shear Zone, at the contact with mafic-ultramafic sequence, and a metasedimentary sequence on the south south-east flank of the Ghooli Dome. The Footwall contains high Mg basalts, and Hanging Wall argillic and arenitic metasedimentary rocks.
No old historic information could be found for the Yilgarn Star name, and it may have been a modern discovery. Open pit mining began in 1991 by Gascoyne Gold Mines NL. Underground mining commenced in 1995. The mine produced over 100 000 ounces of gold per annum. Sons of Gwalia Ltd took over Gascoyne in 1996. When this company folded, St Barbara took over the leases in the area, then in 2013 Hanking Mining Ltd. The mine has not been active for many years.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
7 valid minerals.
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
|Archean volcanic rocks|
Age: Archean (2500 - 3200 Ma)
Comments: Yilgarn Craton
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. 
2500 - 4000 Ma
|mafic extrusive rocks 74255|
Age: Archean (2500 - 4000 Ma)
Description: Metabasalt, high-Mg basalt, tholeiitic basalt, carbonated basalt, agglomerate, mafic schist, dolerite, amphibolite; porphyritic basalt and dolerite; komatiitic basalt; mafic pyroclastics; minor mafic schist with granite intercalations
Comments: igneous mafic volcanic; synthesis of multiple published descriptions
Lithology: Igneous mafic 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).