Mount Weld Mine, Mount Weld Station, Laverton Shire, Western Australia, Australia
|Latitude & Longitude (WGS84):||28° 51' 36'' South , 122° 32' 52'' East|
|Latitude & Longitude (decimal):||-28.86000,122.54778|
Carbonatitic REE deposit with additional Nb, Ta, Zr, Ti contents ('Crown deposit' - apparently a separate part of the carbonatite).
Discovered in 1988; owned by Lynas Corp.
Located about 30 km south of Laverton and 120 km east of Leonora.
Rare earths are contained in secondary phosphates and aluminophosphates, presumably derived from weathering of the Proterozoic Mount Weld carbonatite, an intrusive pipe approximately three kilometers in diameter.
One of the references describes churchite as a fragile secondary mineral of microcrystalline acicular radiating crystals. It is found as void filling in crandallite group minerals, and as encrustations on limonite aggregates, weathered magnetite, on crandallite group grains, and sometimes as fine grained intergrowths with limonite
9 valid minerals. 1 erroneous literature entry.
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). 
Lottermoser, B. (1990): Rare-earth Element Mineralisation Within the Mt. Weld Carbonatite Laterite, Western Australia. Lithos (1990):24: 151–167.
Lottermoser, B.(1987):Churchite from the Mt Weld Carbonatite Laterite Western Australia, Mineralogical Magazine(1987):51: 468-469