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- Title
From rocks to ore.
- Authors
Lehmann, B.; Dietrich, A.; Wallianos, A.
- Abstract
Metal enrichment to ore grade is the ultimate outgrowth of large-scale and long-term fractionation processes of the thermally driven and unique water-cooled geological evolution of the Earth. Silicic magmatism along convergent margins is the most important lithospheric fractionation process for the formation of the continental crust and porphyry/intrusion-related ore deposits. Reconnaissance microanalysis of melt inclusions from Central Andean porphyry systems refines a metallogenic model for copper–gold and tin porphyry mineralization. Magmatic mixing and early exsolution of a fluid phase are important ingredients for porphyry Cu–Au systems in association with silicic rocks of moderate levels of fractionation (such as diorites and monzonites), whereas extended magmatic fractionation with late-stage fluid evolution characterize lithophile-element-enriched tin porphyry systems.
- Publication
International Journal of Earth Sciences, 2000, Vol 89, Issue 2, p284
- ISSN
1437-3254
- Publication type
Article
- DOI
10.1007/s005310000085