|Latitude & Longitude (WGS84):||31° 34' 50'' South , 121° 37' 1'' East|
|Latitude & Longitude (decimal):||-31.58083,121.61722|
|Köppen climate type:||BSk : Cold semi-arid (steppe) climate|
Located 11 kilometres south-east of Widgiemooltha.
Eardleyite (otherwise known as Takovite) occurs here in serpentinite as narrow fracture filling, and thin surface coatings. It is associated with glaukosphaerite, nickeloan magnesite, nickeloan glauconite, atacamite, paratacamite, malachite, azurite, chalcopyrite and lithiophorite.
Glaukosphaerite is intergrown with nickeloan celadonite in veinlets of goethite-quartz-tremolite rock.
The prospect was discovered in 1967 by Anaconda and CRA.
The ultramafic formation dips 45 degrees east, 300 metres thick, of picritic to peridotitic flow units, with increasing thickness with depth. It consists of talc, tremolite, chlorite rock, minor carbonate and serpentine. Thin phlogopite rich zones, and chlorite are abundant, with quartz-feldspar porphyry dykes. The Footwall is amphibolite.
There are two shoots, named A and B. A is larger at a length of 600 metres on the surface. It occupies an embayment at the ultramafic-Footwall contact, plunging gently south, although the dip steepens with depth.
The mineralised zone is up to 10 metres thick, but commonly 1-2 metres. Low grade disseminated ore of narrow veins, matrix to massive sulphide at or near the basal contact.
B shoot is 60 metres long, at 200 metres above A shoot, 2-4 metres thick, with a grade lower than A.
Primary mineralisation is pyrrhotite, pentlandite, minor chalcopyrite, gersdorffite, magnetite, chromite, and bismuthinite.
22 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
0 - 2.588 Ma
Age: Pleistocene (0 - 2.588 Ma)
Comments: regolith; synthesis of multiple published descriptions
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.