The Charrarruca porphyry-type alteration zone: New evidence of mineralizing Late Cretaceous-Eocene magmatism in the Southern Central Andes of Argentina

The Charrarruca porphyry-type alteration zone is located in the northern part of the Andacollo Mining District (AMD), placed in the northern Neuquén Precordillera, (Argentina). Potassic, chloritic-carbonatic, sericitic, and propylitic alteration halo of ∼1.5 km2 affects an andesitic/dacitic subvolcanic body. These rocks, with arc affinity and Upper Cretaceous-Paleogene age (65 ± 2.5 Ma), derived from a magma evolved under normal crust thickness conditions, allowing the correlation with the intrusive facies of the Naunauco Group. The petrogenetic characteristics of these rocks attest to indications of the fertility of this magmatism, turning into a prospective guide for the unexplored Upper Cretaceous–Eocene Neuquén porphyry copper metallogenic belt.

Palabras clave: MAGMA FERTILITY , MINERALIZING MAGMATISM , NAUNAUCO GROUP , NEUQUÉN PRECORDILLERA

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)

Identificadores

URI: http://hdl.handle.net/11336/228185

URL: https://linkinghub.elsevier.com/retrieve/pii/S0895981123001098

DOI: https://doi.org/10.1016/j.jsames.2023.104298

Colecciones

Articulos(IGEBA)
Articulos de INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BS. AS

Articulos(INGEOSUR)
Articulos de INST.GEOLOGICO DEL SUR

Citación

D'annunzio, María Celeste; Strazzere, Leonardo; Rubinstein, Nora Alicia; Cócola, María Agustina; Pavon Pivetta, Cecilia Mariana; et al.; The Charrarruca porphyry-type alteration zone: New evidence of mineralizing Late Cretaceous-Eocene magmatism in the Southern Central Andes of Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 125; 5-2023; 1-16

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