Supergene (geology)
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In ore deposit geology, supergene processes or enrichment are those that occur relatively near the surface as opposed to deep hypogene processes. Supergene processes include the predominance of meteor
Idealized mineral vein
Azurite and malachite on limonite from Bisbee, Arizona
Chalcocite pseudomorph after covellite from Butte, Montana
Malachite
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Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO32. This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous,
Supergene (geology)
…that are commonly found in the oxidized zone include lead precipitates like anglesite (PbSO4) and pyromorphite (Pb5(PO4)3Cl); copper precipitates like malachite (Cu2(CO3(OH)2), azurite (Cu3(CO3)2(OH)2), and cuprite (Cu2O); and smithsonite (ZnCO3). At the water table the environment changes from an oxidizing…
The entrance to the Neolithic era malachite mine complex on the Great Orme, Wales
Malachite in the walls of Outokumpu's old mine
The funerary mask of the Red Queen of Palenque is made from a mosaic of malachite.