Tuesday, May 25, 2021 8:53:47 AM
The World Gold Council defines a high-quality underground mine as having a gold ore density between 8 and 10 g/t, while a low-quality underground mine has a gold ore density of 1 to 4 g/t.5? Open-pit mines tend to have a lower grade, but they can be considered very valuable because of the lower average operating costs necessary to obtain them. 11
? The council recommends using cost per ounce, not gold ore grading, to evaluate a gold mine.
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