TY - JOUR
T1 - Petrogenesis of the Miocene Morro del Cobre Cu (Mo)-porphyry deposit in the Frontal Cordillera over the Pampean flat-slab segment, Argentina
AU - Bastías Torres, María Verónica
AU - Rubinstein, Nora
AU - Previley, Lorena
AU - Poole, Gregory
PY - 2021/10
Y1 - 2021/10
N2 - 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 (<10 km) have hydrous and oxidant character, typical of fertile suites worldwide. The emplacement of Morro del Cobre coincides with the passage of the aseismic Juan Fernandez Ridge as many other Miocene productive porphyry deposits in this segment of the Andes.
AB - 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 (<10 km) have hydrous and oxidant character, typical of fertile suites worldwide. The emplacement of Morro del Cobre coincides with the passage of the aseismic Juan Fernandez Ridge as many other Miocene productive porphyry deposits in this segment of the Andes.
KW - Adakitic signature
KW - Central Andes
KW - Fertile character
KW - Subduction of Juan Fernandez ridge
KW - Thickened crust
KW - Upper mineralizing magmatism
UR - http://www.scopus.com/inward/record.url?scp=85106538713&partnerID=8YFLogxK
U2 - 10.1016/j.jsames.2021.103343
DO - 10.1016/j.jsames.2021.103343
M3 - Article
AN - SCOPUS:85106538713
SN - 0895-9811
VL - 110
JO - Journal of South American Earth Sciences
JF - Journal of South American Earth Sciences
M1 - 103343
ER -