|Latitude & Longitude (WGS84):||32° 38' 42'' South , 115° 58' 52'' East|
|Latitude & Longitude (decimal):||-32.64499,115.98112|
|Köppen climate type:||Csa : Hot-summer Mediterranean climate|
An aluminum mine with bauxite ore. Owned by Alcoa of Australia (51%) and local interests (49%).
Former bauxite mine operated by Alcoa, near Dwellingup. It is named after two roads in the area, and was opened in 1972 as Alcoa's second bauxite mine after the one at Jarrahdale. In its twenty years of operation, it produced 54 500 tonnes of bauxite.
In 1957, exploratory pits were dug at Plavins and Coach Road both east of Dwellingup, and Cobiac east of Jarrahdale. These tests proved an extensive and economical mineable bauxite resource, and a new company was formed called Alcoa. The first mine opened at Jarrahdale in 1963, sending ore by rail to the Kwinana Refinery.
Most Australian bauxite is lateritic, formed by intense weathering of various rock formations. The alumina in lateritic bauxite is mainly in the form of gibbsite, as aluminium oxide trihydrate.
Alcoa has refineries at Kwinana, Pinjarra and Worsley, and mines at Huntly and Willowdale. A separate company mines bauxite near Boddington, which is transported by converyor to its Worsley Refinery near Collie.
The region produces 16% of world demand for bauxite. Australia has huge reserves of bauxite which is mined at Weipa in northern Queensland and Gove in the Northern Territory. The Mitchell Pateau deposit in the Kimberley, Western Australia is un-developed. The mines produce no specimens.
Regions containing this locality
|Australian Plate (Australia Plate)||Tectonic Plate|
|West Australian Element, Western Australia, Australia||Craton|
|Yilgarn Craton, Western Australia, Australia||Craton|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
List of minerals for each chemical element
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 crystalline metamorphic 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
|felsic intrusives 74292|
Age: Archean (2500 - 4000 Ma)
Description: Undifferentiated felsic intrusive rocks, including monzogranite, granodiorite, granite, tonalite, quartz monzonite, syenogranite, diorite, monzodiorite, pegmatite. Locally metamorphosed, foliated, gneissic. Local abundant mafic and ultramafic inclusions
Comments: igneous felsic intrusive; igneous intermediate intrusive; synthesis of multiple published descriptions
Lithology: Igneous felsic intrusive; igneous intermediate intrusive
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).