Metallogeny of Granitoid-Related Ore Deposits
Summary
Granitoid-related ore deposits encompass a spectrum of mineral systems in which granitic magmatism plays a primary role in metal transport and concentration. These deposits range from intrusion-related gold–bismuth systems and porphyry copper–gold–molybdenum types to tin–tungsten and rare-metal greisen bodies. Their metallogeny is governed by the petrogenesis of granitoid magmas, the physicochemical evolution of magmatic–hydrothermal fluids and their structural trapping. Key factors include source composition (mantle, crustal or hybrid), magma differentiation and volatile content, redox state and fluid speciation. Tectonic setting directs magma ascent and emplacement, controlling pressure–temperature (P–T) paths and fluid release mechanisms. As magmas cool, exsolved aqueous and CO₂-rich fluids migrate along fractures to form ore shells or vein networks. Variation in oxygen fugacity, sulphur activity and ligand chemistry determines metal solubility and partitioning between melt, fluid and sulphide phases. Understanding these processes at multiple scales—from zircon U–Pb dating and geochemical fingerprints to fluid inclusion analysis and structural mapping—provides insight into deposit fertility, spatial distribution and exploration targeting in a global context.
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Metallogeny of Granitoid-Related Ore Deposits publication trend
The graph below shows the total number of articles in metallogeny of granitoid-related ore deposits across all publications each year (not limited to Nature Index journals).
Technical terms
Granitoid: A coarse-grained felsic intrusive rock family including granites, granodiorites and monzonites.
Intrusion-related deposit: An ore system spatially and genetically linked to a specific intrusive body, often gold–bismuth or porphyry type.
Redox state (oxygen fugacity): A measure of the availability of oxygen for chemical reactions in magmas or fluids, influencing metal solubility.
Fluid inclusion: Microscopic pockets of trapped fluid within minerals, used to reconstruct P–T–X conditions of ore-forming systems.
Arc-related: Pertaining to magmatism above a subduction zone, typically generating hydrous, metal-rich magmas.
Monzonite/Syenite: Intermediate intrusive rocks; monzonite has roughly equal plagioclase and alkali feldspar, syenite is alkali feldspar-rich.
References
- Granitoids of the Ergelyakh Intrusion-Related Gold–Bismuth Deposit (Kular-Nera Slate Belt, Northeast Russia): Petrology, Physicochemical Parameters of Formation, and Ore Potential. Minerals (2019).
- Petrography, Geochemical Features and Absolute Dating of the Mesozoic Igneous Rocks of Medvedev and Taezhniy Massifs (Southeast Russia, Aldan Shield). Minerals (2022).
- Ore-Bearing Magmatic Systems with Complex Sn–Au–Ag Mineralization in the North-Eastern Verkhoyansk–Kolyma Orogenic Belt, Russia. Minerals (2021).
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