Skarn

Ore deposit

Where a granite intrudes limestone or dolostone, hot fluids replace the carbonate rock with calcium, iron and magnesium silicates, garnet and pyroxene above all, and can leave ores of iron, copper, tin, tungsten, zinc, lead or gold. The word is an old Swedish miners' term for the waste rock of the iron mines of Persberg.

Rocks

Limestone, Dolostone, Marble, Granite

Minerals

Garnet, Vesuvianite, Wollastonite, Actinolite, Epidote, Scapolite, Magnetite, Hematite, Chalcopyrite, Spessartine, Apophyllite, Scheelite, Richterite, Diopside, Grossular, Axinite, Danburite, Taaffeite, Lazurite, Tetrahedrite, Bornite, Cobaltite, Molybdenite

Metals

Cobalt, Copper, Iron, Molybdenum, Silver, Tungsten

Worked

Before and since the industrial age

Examples

Persberg mining district, Värmland, Sweden

Sources

• Skarn. Wikipedia.

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