BECAS
COCOLA Maria Agustina
artículos
Título:
The Charrarruca porphyry-type alteration zone: New evidence of mineralizing Late Cretaceous-Eocene magmatism in the Southern Central Andes of Argentina
Autor/es:
D'ANNUNZIO, MARÍA CELESTE; STRAZZERE, LEONARDO; RUBINSTEIN, NORA; CÓCOLA, MARÍA AGUSTINA; PAVÓN PIVETTA, CECILIA; GERALDES, MAURO CESAR
Revista:
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2023 vol. 125
ISSN:
0895-9811
Resumen:
The Charrarruca porphyry-type alteration zone is located in the northern part of the Andacollo Mining District (AMD), placed in the northern Neuqu´en 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 CretaceousEocene Neuquén porphyry copper metallogenic belt.