Magnetite-series and ilmenite-series granites

A classification of granites by oxidation state (Ishihara, 1977). Oxidised magnetite-series granites go with copper, molybdenum and gold; reduced ilmenite-series granites, often of crustal origin, go with tin and tungsten.

Composition

Magnetite series: 0.1 to 2 vol% magnetite; ilmenite series: less than 0.1%.

Sources

• Ishihara (1977), Mining Geology

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