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Dolomites are the favored host rocks for low-temperature lead /zinc ore deposits, probably because many dolomites have formed in evaporitic environments. Association with a local sulfur source probably enhanced the chances of ore formation. Reduction of sulfate in the presence of organic matter such as gas or oil is the most likely intermediate step. If so, the presence of sulfide ores in apparently sulfate-free dolomites may indicate a former sulfate abundance. Ore bodies are commonly associated with solution-collapse breccias, which are often attributed to evaporite solution. The nearly complete subsequent removal of the evaporites makes this difficult to prove,...

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