That low-hanging fruit — where did it all go?

Using gold deposits as an example, these two graphs show that, over time as mineral exploration and mining depleted discovered grassroots ore bodies, the average ore grades of new discoveries weakened while average size of these new discoveries  decreased.  This means the number of grassroots ore bodies is finite and earlier mining ‘cherry-picked’ the better-sized and grade shallow deposits.

Getting SmallerGetting Weaker

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