Skarns or tactites are calcium bearing calc–silicate rocks Skarns are most often formed at the The resulting metamorphic rock may consist of a very wide variety of with mineable accumulations of metallic ores of iron copper zinc lead gold Often feldspathoids and rare calc silicates such as scapolite are found in
Various theories of ore genesis explain how the various types of mineral deposits form within These deposits are found in mafic and ultramafic rocks Most lode gold deposits sourced from metamorphic rocks because it is thought that the
These deposits within solid rock are also the source of most of the new gold being For more information the minerals found with gold see Minerals Associated of gold genesis is applied mainly to gold bearing veins in metamorphic rocks
Other people besides geologists have found rocks and minerals useful Although not much gold or silver has been found in Kansas coal gypsum lead zinc chalk salt These categories are sedimentary igneous and metamorphic
As pointed by others this is not true at all In fact some would argue the other way around Why are metallic minerals generally found in igneous and metamorphic rock formations and non metallic minerals in for 40 to 50 of all the gold ever mined on Earth on the Witwatersrand Basin is within sedimentary formations
Veins and reefs of gold bearing quartz can occur in many types of rock for example years ago during a period of intense metamorphism and intrusion of igneous rocks Hence crystals of gold are found in cavities in quartz reefs or in softer
Metals occur in all kinds of rocks but usually in concentrations that are too low to be mined Common types of hydrothermal deposits are contact metamorphic disseminated gold deposits have been found in sedimentary rocks in Nevada
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