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Global Geoscience evaluates options at Rhyolite Ridge lithium-boron project

Global Geoscience Ltd. said Dec. 19 that the initial mining study at its Rhyolite Ridge lithium-boron deposit in Nevada confirmed the potential for low-cost open pit mining at rates of 2 million to 4 million tonnes per annum, with 1 million tonnes of mineralization containing about 8,700 tonnes of lithium carbonate and 77,200 tonnes of boric acid.

The two scenarios evaluated were a smaller constrained starter pit shell comprising 26 million tonnes at 0.74% lithium carbonate and 1.24% boron, which will support a 2 million-tonne-per-annum operation for over 10 years, and a larger unconstrained pit shell comprising 87 million tonnes at 0.87% lithium carbonate and 1.35% boron, which will support a 4 million-tonne-per-annum operation for over 20 years.

The indicated and inferred lithium-boron resource at the Rhyolite Ridge project was doubled in a recent estimate, totaling 459.5 million tonnes grading 0.9% lithium carbonate, 2.6% boric acid and 1.7% potassium sulfate. The high-grade component is estimated at 137.1 million tonnes at 0.9% lithium carbonate, 7.2% boric acid and 2.0% potassium sulfate, with 75% of the resource in the indicated category.