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Table T3. Styles of sulfide mineralization.

Style of alteration Diagnostic features
Massive sulfide Rocks containing >75% sulfide minerals.
Semimassive sulfide Rocks containing >25%–75% sulfide minerals, which form aggregates or intergrowths.
Disseminated sulfide Rocks containing 5%–25% disseminated sulfides.
Void fill Minerals partially or totally filling a void (vesicle, etc.).
Vein/Stringer sulfide Rocks containing sulfide in fractures.
Detrital sulfide Clastic sulfide fragments in sediment.

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