Petrogenesis of the Miocene Morro del Cobre Cu (Mo)-porphyry deposit in the Frontal Cordillera over the Pampean flat-slab segment, Argentina

Petrogenesis of the Miocene Morro del Cobre Cu (Mo)-porphyry deposit in the Frontal Cordillera over the Pampean flat-slab segment, Argentina

The Morro del Cobre porphyry (Cu-Mo-Au) deposit, genetically linked to the upper Miocene magmatism (~9–10 Ma), is located at the eastern margin of the Andean Frontal Cordillera of San Juan, Argentina, over the Pampean flat-slab segment (28–33°S) of the Central Andes. The petrogenetic analysis of the...

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Veröffentlicht in:Journal of South American earth sciences 2021-10, Vol.110, p.103343, Article 103343
Hauptverfasser: Bastías Torres, María Verónica, Rubinstein, Nora, Previley, Lorena, Poole, Gregory
Format: Artikel
Sprache:eng
Schlagworte:
Adakitic signature
Central Andes
Fertile character
Subduction of Juan Fernandez ridge
Thickened crust
Upper mineralizing magmatism
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Zusammenfassung:The Morro del Cobre porphyry (Cu-Mo-Au) deposit, genetically linked to the upper Miocene magmatism (~9–10 Ma), is located at the eastern margin of the Andean Frontal Cordillera of San Juan, Argentina, over the Pampean flat-slab segment (28–33°S) of the Central Andes. The petrogenetic analysis of these rocks reveals an arc affinity and an adakite-like signature with the source magmas evolving under thickened crust conditions which resulted in a high pressure (amphibole ± garnet) residual mineralogy. These mineralizing magmas, that evolved towards shallower magma chambers (
ISSN:0895-9811
1873-0647
DOI:10.1016/j.jsames.2021.103343