Skarn Zones

The most important skarn zones are the best source of iron, zinc, and scheelite. They also include gold, silver, lead, and molybdenum ores. Skarn Zones are exposed to metasomatism and metamorphism processes.

Skarn zones grow up with pressure, temperature, fluids, and wall rock combinations.Skarn Zones have important metals just as W,Fe,Zn,Pb,Mo,Ag,Bi and Sn.There is a difference between deep and shallow skarn zones. The skarn zone is very severe in deep but neither in shallow.Skarn zone is exposed to high alteration in shallow.

The most known skarn minerals are pyroxenes, garnet, and amphiboles.But amphiboles aren't using in the graphically models because of structural and compositional differences.Skarn types like Sn and W occur at very high temperatures (700 degree)On the other hand, Cu and Zn occur almost 300 degrees.For this reason, we can conclude that skarns like Cu and Zn occur in shallow depth. We can classify skarn types as far as economic metal composition:

1.Fe - 2.Cu - 3.Au - 4.Zn-Pb-Ag - 5.W-Cu - 6.Sn - 7.Mo

Russia, the USA, and some European countries have big skarn mines. These mines usually occurred in the Cenozoic-Mesozoic orogenic belt.