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Iron oxide copper-gold deposits are also often associated with other valuable trace elements such as uranium, bismuth and rare-earth metals, although these accessories are typically subordinate to copper and gold in economic terms. Some examples include the Olympic Dam, South Australia, and Candelaria, Chile deposits.
Troctolites are unusual olivine-rich pyroxene-poor gabbros common in layered mafic intrusions believed to have formed as cumulates in a magma chamber.Cumberlandite has light phenocrysts of labradorite in a dark, fine to medium-grained matrix of magnetite, ilmenite, olivine, and hercynite spinel.
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