Artículo
Torres, M.G.; Rubinstein, N.; Meissl, E. "Lithology, mineralization and alteration of the el Pachón deposit, San Juan province, Argentina " (2018) Revista de la Asociacion Geologica Argentina. 75(1):39-45
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Abstract:
El Pachón is a porphyry copper-molybdenum deposit located at southwest of San Juan province, near the border with Chile. This deposit is hosted by a volcanic sequence of andesites and rhyolites-rhyodacites (Pachón Formation) with a Late Cretaceous-early Miocene age. This volcanic sequence is intruded by Miocene diorite-tonalite intrusives (Diorita Pachón), which are genetically linked to the mineralization, and by late dacitic porphyries. Petro-mineralogical studies of surface and drilling samples allow us to define alteration assemblages of typical porphyry deposits. The hydrothermal system started with a potassic stage with an assemblage of K-feldspar-biotite (quartz) with a pervasive distribution and A, EB and B veinlets with an associated ore paragenesis consisting of chalcopyrite-pyrite ± (molybdenite-bornite). During this stage, a breccia consisting of a first stage pf brecciation with quartz cement and a second stage of brecciation with a tourmaline cement was formed (Breccia South). Later on there was a phyllic stage with an assemblage of quartz-sericite-pyrite-(chlorite) with a pervasive distribution and D veinlets. The hydrothermal processes continues and is evidenced by a barren tourmaline stage that developed a breccia body (Breccia North). A propylitic alteration with an assemblage of chlorite-epidote-calcite with pervasive and in veinlets distribution developed around the phyllic halo. © 2018, Taylor and Francis Ltd. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Lithology, mineralization and alteration of the el Pachón deposit, San Juan province, Argentina |
| Autor: | Torres, M.G.; Rubinstein, N.; Meissl, E. |
| Filiación: | CONICET-Universidad Nacional de San Juan, Departamento de Geología, San Juan, Argentina IGEBA (UBA-CONICET), Departamento de Ciencias Geológicas, Ciudad Autónoma de Buenos Aires, Argentina Departamento de Geología, Instituto de Geología (INGEO), Universidad Nacional de San Juan, San Juan, Argentina |
| Palabras clave: | Breccias; Cordillera Principal; Cu (Mo) porphyry deposit; Hydrothermal alteration; Ore paragenesis; breccia; copper; hydrothermal alteration; lithology; mineralization; molybdenum; ore deposit; paragenesis; porphyry; Argentina; San Juan [Argentina] |
| Año: | 2018 |
| Volumen: | 75 |
| Número: | 1 |
| Página de inicio: | 39 |
| Página de fin: | 45 |
| Título revista: | Revista de la Asociacion Geologica Argentina |
| Título revista abreviado: | Rev. Asoc. Geol. Argent. |
| ISSN: | 00044822 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p39_Torres |
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Citas:
---------- APA ----------
Torres, M.G., Rubinstein, N. & Meissl, E. (2018) . Lithology, mineralization and alteration of the el Pachón deposit, San Juan province, Argentina . Revista de la Asociacion Geologica Argentina, 75(1), 39-45.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p39_Torres [ ]
---------- CHICAGO ----------
Torres, M.G., Rubinstein, N., Meissl, E. "Lithology, mineralization and alteration of the el Pachón deposit, San Juan province, Argentina " . Revista de la Asociacion Geologica Argentina 75, no. 1 (2018) : 39-45.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p39_Torres [ ]
---------- MLA ----------
Torres, M.G., Rubinstein, N., Meissl, E. "Lithology, mineralization and alteration of the el Pachón deposit, San Juan province, Argentina " . Revista de la Asociacion Geologica Argentina, vol. 75, no. 1, 2018, pp. 39-45.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p39_Torres [ ]
---------- VANCOUVER ----------
Torres, M.G., Rubinstein, N., Meissl, E. Lithology, mineralization and alteration of the el Pachón deposit, San Juan province, Argentina . Rev. Asoc. Geol. Argent. 2018;75(1):39-45.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p39_Torres [ ]
