high grade gold ore from a quartz vein near alma colorado

high grade gold ore from a quartz vein near alma colorado

— Geologic Survey, and the Division of Reclamation and Safety, these ... issues were ranked as an “issue of priority” in the Coalition ... pyritically altered monzonites of the Oligocene-age Montezuma stock ... exploited pyrite-associated , hosted in a northwest-striking porphyry.

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