Mica and pyrite are minerals found in the ground and in rocks that are excavated from quarries and used in building blocks. These minerals cause defects in building blocks, which lead to cracks and ...
The ore zone is within a sulphidized iron formation with arsenopyrite, pyrrhotite and pyrite contents of 12.2%, 8.6% and 6.4% respectively. Precious metals occur as a gold/silver alloy freely within ...
An industrial resurrection seems afoot at a long-promising but snakebitten $2 billion-plus taconite project. On a crisp fall ...
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