In-Ground Mineral Reserves Lenders (Commercial/ABL/Mezz/etc)

Does anyone have Lender contacts who have experience lending on In-Ground Minerals (Commercial/ABL/Mezz/etc) ?

The minerals in-ground are SILICA material with "PROVEN" reserves of $730M+ and "inferred" $6.4B valuation.

Mine Reserve Valuation report in-hand. redacted