Skarns or tactites are coarse-grained metamorphic rocks that form by replacement of carbonate-bearing rocks during regional or contact metamorphism and metasomatism.

Apr 23, 2023 · 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.

Apr 8, 2016 · Arguably, copper skarns are the world’s most abundant skarn type. They are particularly common along subduction zones— and are found in both oceanic and continental margins. The largest copper...

Nov 2, 2007 · The largest copper skarns are associated with mineralized porphyry copper plutons. These deposits can exceed 1 billion tons of combined porphyry and skarn ore with more than 5 million tons of copper recoverable from skarn.

Apr 23, 2023 · Skarn deposits are economically significant sources of metals such as copper, gold, silver, zinc, lead, tungsten, and iron, among others. They are important because they can be large and high-grade deposits, and can be mined using underground or open-pit methods.

Feb 9, 2024 · Most known copper (Cu) skarns are associated with oxidized intrusions. In this contribution, we report a Cu skarn associated with a reduced monzodioritic intrusion at Huanren, northeastern China, which contains 0.41 Mt of Cu accompanied by economic concentrations of Zn, Pb, Fe, Mo, and Ag.

Copper skarns are perhaps the worlds most abundant skarn type. They are particularly common in orogenic zones related to subduction, both in oceanic and continental settings. Major reviews of copper skarns include Einaudi et al. (1981) and Einaudi (1982a,b).

Skarns are coarse-grained metamorphic rocks composed of calcium-iron-magnesium-manganese-aluminum silicate minerals (commonly referred to as "calcsilicate" minerals) that form by replacement of carbonate-bearing rocks (in most cases) during contact or regional metamorphism and metasomatism.

Breccia pipe, cutting skarn at Victoria, is host for ore. Associated igneous rocks are commonly barren. Weathering Cu carbonates, silicates, Fe-rich gossan. Calc-silicate minerals in stream pebbles are a good guide to covered deposits.

Skarn commonly forms around the edges of a magma body that intrudes a nearby rock mass. Rocks formed or altered by the interaction of magma, country rock, reactive fluids, and heat are known as skarn. Other environments of metasomatic activity are also known to produce skarn.