Artículo
Adakitic signal linked to Gondwanan porphyry type deposits from the Andean Frontal Cordillera of Argentina
Fecha de publicación:
05/2020
Editorial:
Elsevier Gmbh, Urban & Fischer Verlag
Revista:
Chemie Der Erde
ISSN:
0009-2819
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The Yalguaraz Cu - (Mo) porphyry deposit, genetically linked to the early Permian magmatism (279.9 ± 3.2 Ma), is located at the eastern margin of the Andean Frontal Cordillera of Argentina, 15 km north of the Permian San Jorge Cu porphyry deposit. The geochemistry of this Gondwanan metal-bearing magmatism reveals an arc affinity and an adakite-like signature. The petrogenetic analysis of these rocks also suggests assimilation of the continental crust in the source magmas and a change in the residual mineralogy from amphibole ± plagioclase in San Jorge magmas, to garnet in Yalguaraz magmas. This change to a higher-pressure residual mineralogy suggests increasing crustal thickness, which is consistent with regional geodynamic changes including progressive shallowing probably due to the subduction of an aseismic ridge south of 31°S in the Andes of Argentina during the lower Permian.
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Articulos(IGEBA)
Articulos de INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BS. AS
Articulos de INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BS. AS
Citación
Torres, Maria Gabriela; Rubinstein, Nora Alicia; Poole, Gregory; Hagemann, Steffen; Adakitic signal linked to Gondwanan porphyry type deposits from the Andean Frontal Cordillera of Argentina; Elsevier Gmbh, Urban & Fischer Verlag; Chemie Der Erde; 80; 2; 5-2020
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