Electronic Resource
Springer
International journal of earth sciences
89 (2000), S. 284-294
ISSN:
1437-3262
Keywords:
Key words Metallogeny
;
Ore deposits
;
Porphyry systems
;
Central Andes
;
Melt inclusions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s005310000085
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