History

Located on Federal (Bureau of Land Management) land at an altitude of approximately 1,800m, the project area is uninhabited semi-arid desert with annual rainfall averaging 10mm.

From the 1850’s through the 1890’s, boron was extracted from several small mines in the area. Small-scale historical boron mining took place in the South Basin at Rhyolite Ridge.

In 1966, Albemarle’s Silver Peak Mine began extracting lithium from brines in Clayton Valley. Located approximately 25km east of Rhyolite Ridge, Silver Peak is currently the only producing lithium mine in the USA.

Two campaigns of modern lithium-boron exploration are known to have been undertaken within the project area. 

In the 1980's US Borax (subsidiary of Rio Tinto Group) surface sampled and drilled a basin of lithium and boron-rich sediments over a 6km by 4km area. The area was known as the North Borate Hill project and US Borax completed 46 drill holes totalling about 17,000m. The work focussed on exploring for boron and the lithium mineralisation was largely ignored.

In addition to the exploration completed at North Borate Hill, US Borax also drilled 12 holes at South Borate Hill where higher lithium values were noted.

In 2010 to 2011 American Lithium Minerals Inc and Japan Oil, Gas and Metals National Corporation (“JOGMEC”) conducted exploration for lithium in the South Basin area. The exploration included surface samples and 36 drill holes. 

Global Geoscience announced the acquisition of an option over Rhyolite Ridge in June 2016 and completed the purchase of a 100% interest in the project in July 2017. 

Global now owns 100% interest in 359 unpatented mining claims covering an area of 29.5 km2. Global also has an option over unpatented mining claims covering a further 7 km2 in the North Basin area.
 

Rhyolite Ridge

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