|Latitude & Longitude (WGS84):||31° 2' 43'' South , 122° 12' 47'' East|
|Latitude & Longitude (decimal):||-31.04535,122.21316|
|Köppen climate type:||BSh : Hot semi-arid (steppe) climate|
The Santa Gold Mine is 20 kilometres east of the Randall processing plant. It is an open pit, with a smaller adjoining pit to the south, and small adjoining pit to the north. The pits are called Santa, Craze and Cressfield. The Cock-Eyed Bob, Maxwells and Rumble mines are to the south-west.
Santa has an Indicated Resource of 3716.8 Mt at 2.2 g/t yielding 267 200 ounces; and an Inferred Resource of 1696.2 Mt at 2.5 g/t yielding 135 600 ounces of gold.
The deposit is located in metamorphosed banded iron formation, that forms a minor component of the Mount Belches greywacke. Two known banded iron formation members host all the known gold deposits in the area. The first is the upper outcropping Santa member, and second the poorly exposed Maxwell member, both present in the Santa area.
The Santa group is part of the most north-east antiformal structure. There is a light chevron folding pattern of banded iron formation across the entire Randall area. Rumble and Maxwells is in the central antiformal structure.
Santa is located in the core of the anticlinal fold nose, on the most easterly chevron fold in the area. The deposit is aligned with the north-west striking axial plane of the fold.
Mineralisation at Santa is hosted in multiple packages of interbedded magnetite and amphibole rich banded iron formation, with bedded greywacke. The mineral zone is magnetite and pyrrhotite rich banded iron formations, closely associated with coarse grained and locally massive arsenopyrite. Gold is very visible within the sulphide rich banded iron formation units.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
8 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
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
2500 - 4000 Ma
|sedimentary rocks 74322|
Age: Archean (2500 - 4000 Ma)
Description: Phyllitic schist, siltstone, sandstone, greywacke, pelite, conglomerate, quartzite, phyllite, shale, slate, claystone, chert, minor felsic volcanic and volcaniclastic rocks; arkose, para- and orthoamphibolites; rare banded iron formation
Comments: argillaceous detrital sediment; sedimentary siliciclastic; synthesis of multiple published descriptions
Lithology: Argillaceous detrital sediment; sedimentary siliciclastic
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). 
|Neoarchean - Mesoarchean|
2500 - 3200 Ma
|Archean sedimentary rocks|
Age: Archean (2500 - 3200 Ma)
Comments: Yilgarn Craton
Lithology: Sedimentary 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.