- Tawana’s 100%-owned Cowan Project covers a 26km strike of two rare earth pegmatite belts over 159km²
- Cowan is 50km south-east of Kambalda, Western Australia and 75km south-east of the Mt Marion Lithium Project
- Located adjacent to Bald Hill Mine which has a refurbished gravity plant and tantalum reserve in pegmatite
- Project is drill ready, allowing rapid understanding of resource potential
- Numerous lithium-rich pegmatites mapped, anomalous lithium in wide-spaced geochemistry and rock chip sampling
- Recent rock-chip sampling returned grades up to 3.99% Li2O from spodumene rich pegmatites
- Vast number of pegmatites have been discovered through limited exploration mapping and drilling, some of which are rich in spodumene (tantalum has been focus of prior exploration)
- Spodumene pegmatites contain low lithium mica content
- Potential for by-products credits and/or high grade
- <350km from port, mostly by sealed highway
The Cowan Lithium Project is located 50km south east of Kambalda in the Eastern Goldfields of Western Australia. It is 75km south east of the Mt Marion Lithium project, which hosts a JORC-compliant resource of 60.5Mt @ 1.36% Li2O, with six deposits all open along strike and at depth.
Known Pegmatite Belts within the Cowan Project Area
Tawana’s Cowan Project covers a 26km strike of two belts containing a large number of rare element pegmatites. A number of spodumene-rich pegmatites have been mapped, and a large number of drill-ready lithium geo-chemical anomalies identified in previous exploration data. Recent rock-chip sampling returned grades of up to 1.85% Li (3.99% Li2O) from spodumene-rich pegmatite. Drilling to test the known spodumene pegmatites and lithium geochemical anomalies commenced in September 2016.
The project area comprises Archaean quartz-biotite metasediments and amphibolites of the Eastern Goldfields Terrane of the Yilgarn Craton. These metasediments trend north-south and have been intruded by large numbers of pegmatites.
Two main belts of rare element Lithium-Caesium-Tantalum type (“LCT”) pegmatites are known in the project area. LCT type pegmatites are derived from highly siliceous, peraluminous (S-Type, ‘fertile’ granites) as highly fractionated granitic melts. These fractionated melts contain the rare elements (Be, Rb, Cs, Sn, Nb, Ta etc) and a high volatile content (H2O, F, B, P and Li). Petr Černý’s pegmatite classification (Černý 1991) is the accepted standard.
The two large LCT pegmatite belts defined within the project area are:
1. Mt Belches | Bald Hill (“MBBH Belt”)
This pegmatite belt striking north to northwest extends for at least 15km, however the pegmatite belt likely extends for at least 25km under transported cover. Albite-rich and LCT type albite-spodumene pegmatites occur over a width of about 4km. Previous exploration and exploitation has been focused on tantalum and tin. About 10km strike of the pegmatite belt is located on the Mount Belches tenements.
2. Claypan Dam | Madoonia (“CDM Belt”)
This less explored northeast-southwest oriented LCT pegmatite belt has a strike of at least 22km and width of at least 7km. The belt is known to contain LCT albite pegmatites with tantalite and tin, and potentially hosts LCT albite-spodumene pegmatites. A significant portion of the belt is covered by the Mount Belches tenements.