Skarn is an old Swedish mining term originally used to describe a type of silicate gangue, or waste rock, associated with iron-ore bearing sulfide deposits apparently replacing Palaeoproterozoic age limestones in Sweden's Persberg mining district.

2007年11月2日 · Near the historic Carmody mine (Klepper et al. 1971), skarn associated with the East Butte Diorite occurs as a single stratabound layer in the Wolsey Formation. Skarn is presumed to have replaced a carbonate layer and is surrounded by biotite hornfels in the originally more argillaceous lithologies.

La Colorada Skarn is a large silver-bearing polymetallic deposit discovered in 2018 by Pan American through brownfield exploration. The Preliminary Economic Assessment (“PEA”) currently envisions a 50,000 tonnes per day sub-level underground cave mining method, a conventional selective zinc and lead flotation processing plan and a dry-stack ...

2023年4月23日 · Skarn deposits are a type of ore deposit formed by metasomatic replacement in carbonate rocks, typically limestone or dolomite. They are characterized by their association with skarn, a coarse-grained, silicate-rich metamorphic rock that is formed by the interaction of hot, magmatic fluids with carbonate rocks.

2023年4月23日 · Skarn is coarse-grained metamorphic rocks that forms by a metasomatism. Also called tactites. Skarn tend to be rich in calcium-magnesium-iron-manganese-aluminium silicate minerals that also regerred to calc-silicate minerals.

2005年1月1日 · Skarn deposits are one of the more abundant ore types in the earth’s crust and form in rocks of almost all ages. Skarn is a relatively simple rock type defined by a mineralogy usually dominated by calcsilicate minerals such as garnet and pyroxene.

An old Swedish mining term for silicate gangue (amphibole, pyroxene, garnet, etc.) of certain iron ore and sulfide deposits of Archean age, particularly those that have replaced limestone and dolostone.

2012年5月1日 · Gold in the Geodo Mine occurs in a retrograde alteration stage within a garnet-rich proximal zone. Skarn minerals associated with gold ore include Fe-rich garnet (Ad 57–95 Gr 1–41) and a wide range of clinopyroxene (Hd 20–100 Di 0–79) compositions, broadly similar to those of typical gold-bearing skarn deposits. The paragenetic stages ...

Skarns have been mined for Fe, W, Sn, Cu, Pb, Zn, Mo, Ag, Au, U, REE, F, and B. Skarns are classified descriptively based on predominant ore metal. Metal endowments, calc-silicate assemblages, tectonic settings, and igneous associations are discussed in …

Skarns are commonly associated with sulphide ore bodies containing Fe, Cu, Ag, Au, Mo, and W, among other commercially valuable elements (B, Be, rare earth elements). Indeed, the term ‘skarn‘ is an old Swedish mining term that was used to describe the sterile ‘wasterock’ associated with such deposits.