Granite Petrogenesis and Mineralization Processes

Granite petrogenesis encompasses the origin, evolution and emplacement of silica-rich, coarse-grained igneous rocks derived from partial melting of the continental crust or recycled sediments. Melting may be induced by thermal input from mantle upwelling, crustal thickening or radiogenic heat production, yielding magmas that evolve through fractional crystallisation, magma mixing and assimilation of surrounding wall-rock. During these processes, incompatible trace elements such as Li, Cs, Sn, W and rare metals become progressively enriched in the evolved melts. Upon ascent and emplacement, granite magma chambers develop crystal-rich cupolas at shallower levels, where volatile saturation triggers exsolution of magmatic–hydrothermal fluids. These fluids migrate along fractures and form greisen, pegmatite and vein systems, depositing metals as temperature and pressure decline. Subsolidus alteration and late-stage metasomatism further redistribute elements, producing economically significant mineralisation. The interplay between magmatic differentiation, fluid phase separation, and external fluid influx dictates the style and grade of ore formation. Globally, granite-hosted mineral systems underpin critical supplies of tin, tungsten, lithium and rare earth elements, and represent targets for geothermal energy due to elevated heat production in certain plutons.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Granite Petrogenesis and Mineralization Processes publication trend

The graph below shows the total number of articles in granite petrogenesis and mineralization processes across all publications each year (not limited to Nature Index journals).

Technical terms

Petrogenesis: The processes of magma generation, evolution and solidification leading to rock formation.

Fractionation: The progressive removal of early-crystallising minerals from a melt, enriching the residual liquid in incompatible elements.

Hydrothermal fluid: Hot aqueous solution exsolved from magma or circulating in the crust, capable of transporting and depositing metals.

Autometasomatic: High-temperature alteration of primary minerals by fluids derived from the same igneous source.

Peraluminous: A magma or rock chemistry characterised by an aluminium excess relative to sodium, potassium and calcium, favouring minerals like muscovite.

Greisen: A highly altered granite cupola zone enriched in quartz, muscovite, topaz and fluorite, hosting tin-tungsten mineralisation.

References

1. Influence of magmatic and magmatic-hydrothermal processes on the lithium endowment of micas in the Cornubian Batholith (SW England). Mineralium Deposita (2024).
2. Unravelling the effects of magmatic fractionation, fluid phase separation and dilution on the composition of magmatic-hydrothermal fluids of the Cornubian Batholith (SW England). Chemical Geology (2024).
3. Fractionation of Li, Be, Ga, Nb, Ta, In, Sn, Sb, W and Bi in the peraluminous Early Permian Variscan granites of the Cornubian Batholith: Precursor processes to magmatic-hydrothermal mineralisation. Lithos (2017).