|Latitude & Longitude (WGS84):||30° 44' 58'' South , 121° 50' 7'' East|
|Latitude & Longitude (decimal):||-30.74957,121.83534|
|Köppen climate type:||BSh : Hot semi-arid (steppe) climate|
Discovered by Robert Load Cecil Jones in 1938. 40 acres. GML 14Y. The deposit is a short distance from Magnesite Creek, and the Bulong magnesite deposits, on the edge of Lake Yindarlgooda.
It is an un-broken solid body, with calcite veins and asbestos rock, the latter two species of no commercial value. The vermiculite is soft, greenish, and bedded with mica lenses. It has a green chloritic appearance.
E.S. Simpson states bright green vermiculite fills two veins, one 2 feet wide, the other 5 feet, and 10 feet apart in talc-carbonate rock. The green colour varies, in places being greenish-white. There is also thin films of a brittle greenish grey mineral, Simpson suspects is saponite.
When heated the vermiculite at Bulong expands to 15 times its original size, having a metallic lustre and pinkish silver colour.
Jones applied for a reward claim over the original lease in 1946, but the warden refused stating too much time had elapsed, and he should have made the claim in 1938.
97 tonnes was mined across 1939 to 1940, and a small amount in 1941, all sent to the Eastern States. No mining took place during the war years.
75 tonnes was extracted in 1948, with 5 tonnes sent to London from a shaft at the mine. A further 50 tonnes was sent shortly after for use in building construction.
The vermiculite had been sold to Non Porite Ltd Melbourne who stated the bulk shipment was of only fair quality. Hannans Brewery took 60 tonnes for insulation, Lake View and Star mine to clad a boiler and South Kalgurli mine to mix with cement, all the companies in Kalgoorlie. Vermiculite was also sold to Re-Nu Synthetic Products Pty Ltd Melbourne, and Newbolds Sydney.
The Mindat co-ordinates mark Magnesite Creek only, at the magnesite deposit, and therefore the co-ordinates are approximate and only denote the general area.
3 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
|ultramafic and minor mafic rocks 74475|
Age: Archean (2500 - 4000 Ma)
Description: Tremolite-chlorite-talc amphibolite, metapyroxenite, pyroxenite, peridotite, serpentinite, ultramafic schists, komatiite, high-Mg basalt; also chalcedony, silica, jasper, silcrete, silica cap rock on ultramafic rocks
Comments: igneous ultramafic intrusive; meta-igneous ultramafic volcanic; synthesis of multiple published descriptions
Lithology: Igneous ultramafic intrusive; meta-igneous ultramafic 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).