Geochemical characterization of gualcamayo igneous complex, precordillera of san juan
The Gualcamayo Igneous Complex is formed by intrusives and dykes of riodacitic to andesitic composition, located in Gualcamayo Mining District, Central Precordillera of San Juan province, in the flat-slab segment of the Central Andes (28-33 ºS). Field data, petrographic studies and geochemical analy...
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2014
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paper:paper_00044822_v71_n3_p369_DAnnunzio2023-06-08T14:26:44Z Geochemical characterization of gualcamayo igneous complex, precordillera of san juan Central Precordillera Geochemistry Hydrothermal alteration Miocene magmatism Petrography andesite geochemistry hydrothermal activity hydrothermal alteration igneous rock magmatism Miocene petrography Andes Argentina Precordillera San Juan [Argentina] The Gualcamayo Igneous Complex is formed by intrusives and dykes of riodacitic to andesitic composition, located in Gualcamayo Mining District, Central Precordillera of San Juan province, in the flat-slab segment of the Central Andes (28-33 ºS). Field data, petrographic studies and geochemical analyses together with preexisting radiometric ages indicate that they are the product of a Late Miocene (~9 Ma) magmatic stage occurred in an arc tectonic setting with a normal to intermediate thickness crust (~45 km). Linked to this magmatic stage there is an important hydrothermal activity that produced mainly potassic (potassium feldspar-quartz-biotite-magnetite) and subordinate propylitic alteration probably produced by a porphyry copper system. The oxidizing character of this magmatism suggests mineralizing potential for generating porphyry copper type deposits. Moreover andesitic sills formed in a tectonic setting with a normal crust (~30 km). Field data and petrographic studies allow correlating these andesites with the andesitic facies of the Lower Miocene (17-18 Ma) del Aspero Group. © 2014, Asociacion Geologica Argentina. All rights reserved. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v71_n3_p369_DAnnunzio http://hdl.handle.net/20.500.12110/paper_00044822_v71_n3_p369_DAnnunzio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Central Precordillera Geochemistry Hydrothermal alteration Miocene magmatism Petrography andesite geochemistry hydrothermal activity hydrothermal alteration igneous rock magmatism Miocene petrography Andes Argentina Precordillera San Juan [Argentina] |
| spellingShingle |
Central Precordillera Geochemistry Hydrothermal alteration Miocene magmatism Petrography andesite geochemistry hydrothermal activity hydrothermal alteration igneous rock magmatism Miocene petrography Andes Argentina Precordillera San Juan [Argentina] Geochemical characterization of gualcamayo igneous complex, precordillera of san juan |
| topic_facet |
Central Precordillera Geochemistry Hydrothermal alteration Miocene magmatism Petrography andesite geochemistry hydrothermal activity hydrothermal alteration igneous rock magmatism Miocene petrography Andes Argentina Precordillera San Juan [Argentina] |
| description |
The Gualcamayo Igneous Complex is formed by intrusives and dykes of riodacitic to andesitic composition, located in Gualcamayo Mining District, Central Precordillera of San Juan province, in the flat-slab segment of the Central Andes (28-33 ºS). Field data, petrographic studies and geochemical analyses together with preexisting radiometric ages indicate that they are the product of a Late Miocene (~9 Ma) magmatic stage occurred in an arc tectonic setting with a normal to intermediate thickness crust (~45 km). Linked to this magmatic stage there is an important hydrothermal activity that produced mainly potassic (potassium feldspar-quartz-biotite-magnetite) and subordinate propylitic alteration probably produced by a porphyry copper system. The oxidizing character of this magmatism suggests mineralizing potential for generating porphyry copper type deposits. Moreover andesitic sills formed in a tectonic setting with a normal crust (~30 km). Field data and petrographic studies allow correlating these andesites with the andesitic facies of the Lower Miocene (17-18 Ma) del Aspero Group. © 2014, Asociacion Geologica Argentina. All rights reserved. |
| title |
Geochemical characterization of gualcamayo igneous complex, precordillera of san juan |
| title_short |
Geochemical characterization of gualcamayo igneous complex, precordillera of san juan |
| title_full |
Geochemical characterization of gualcamayo igneous complex, precordillera of san juan |
| title_fullStr |
Geochemical characterization of gualcamayo igneous complex, precordillera of san juan |
| title_full_unstemmed |
Geochemical characterization of gualcamayo igneous complex, precordillera of san juan |
| title_sort |
geochemical characterization of gualcamayo igneous complex, precordillera of san juan |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v71_n3_p369_DAnnunzio http://hdl.handle.net/20.500.12110/paper_00044822_v71_n3_p369_DAnnunzio |
| _version_ |
1768546139692335104 |