Look at the facts so far:
- first commercial minerals can be extracted some 60 metres from the surface, and
- its about 12 metres thick,
- then another 54 metres of commercial minerals at 160 metres below surface,
- so can use cheap open pit to extract it,
- cost of production is between $10 to $19 USD per kg of Nb (refer to Page 5 of press release).
- sale is circa $45 per kg of Nb (not including other minerals),
- the question is how big is this discovery.
Ann: West Arunta Project - High Grade Nb-Ta in Weathered Zone, page-97
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