Carbonate-hosted lead-zinc ore deposits and pyrite thus form. Commonly MVT deposits form by the combination of hydrocarbon pyrolysis liberating zinc-lead ions and sulfur to form an acidic solution which dissolves the host carbonate formation and replaces it with massive sulfide accumulations. This may also take the morphology of fault-hosted stockworks, massive tabular replacements and so forth. Porous limestones may form disseminated ores, however most MVT deposits are massive sulfides with knife-like margins between carbonate and sulfide mineralogies. Ore minerals in carbonate replacement deposits are typically lead sulfide, galena, and zinc sulfide sphalerite. Weathered equivalents form anglesite, cerussite, smithsonite, hydrozincite and secondary galena and sphalerite
Galena, South Dakota Galena, South Dakota Galena (also Galena City) is an unincorporated community in Lawrence County, South Dakota, United States. It is often considered to be a ghost town, even though a few families still live in the area. It is not tracked by the U.S. Census Bureau. The town was named after the galena found in the ore in the surrounding mines. In 1875, gold was discovered in the Black Hills and drew settlers to the area. The mines in the area were originally intended to be gold mines, but other metals were more plentiful in the hills. Most of the