Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba

Metalliferous mineralization, disseminated and in hydraulic breccias, in connection with a mining group composed of three swarm systems of quartz veinlets, veins and sills striking NNW, WNW and N, is exposed in the geological setting related to the Cerro Aspero granitic intrusion located in the east...

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Autores principales:	Mutti, D., González Chiozza, S.
Formato:	JOUR
Materias:	Basament Sierras Pampeanas Structural control Wolframiferous deposits
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00044822_v60_n1_p159_Mutti
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00044822_v60_n1_p159_Mutti
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spelling	todo:paper_00044822_v60_n1_p159_Mutti2023-10-03T13:58:03Z Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba Mutti, D. González Chiozza, S. Basament Sierras Pampeanas Structural control Wolframiferous deposits Metalliferous mineralization, disseminated and in hydraulic breccias, in connection with a mining group composed of three swarm systems of quartz veinlets, veins and sills striking NNW, WNW and N, is exposed in the geological setting related to the Cerro Aspero granitic intrusion located in the eastern part of the Sierra de Comechingones. The region was affected by polimetamorphism during the Pampean and Famatinian cycles. At least two events of simple shearing (D3 and D4) and penetrative structures (S2, S3 and S4) were developed, favouring the anorogenic intrusion of Cerro Aspero batholith since late Devonian. This magmatic event was followed by a reactivation of deformation structures and circulation of hydrothermal fluids through rocks underlying a massive amphibolite level belonging to La Aguada formation, which mainly acted as an impermeable barrier in the area. A maximum stress s1 directed 330° promoted the development of mineralized systems following the fracturing pattern of Riedel's model, and also the development of a principal mineralized path related to a simple dextral shear belt, 285° in direction (S5). During the evolution of the magmatic-hydrothermal system, a high number of stages of fracturing and opening along rocks were registered, with sealing of cavities by mechanism of crack seal and pressure dissolution. By these mechanisms, fibrous habit silica was precipitated and metallic elements were concentrated, under a traction regime and a pore fluid pressure estimated in 195 MPa. The age of one of the mineralizing stages was determined in 343,8 ± 10,8 Ma through K/Ar dating in muscovite. © 2005 Asociación Geológica Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v60_n1_p159_Mutti
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Basament Sierras Pampeanas Structural control Wolframiferous deposits
spellingShingle	Basament Sierras Pampeanas Structural control Wolframiferous deposits Mutti, D. González Chiozza, S. Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba
topic_facet	Basament Sierras Pampeanas Structural control Wolframiferous deposits
description	Metalliferous mineralization, disseminated and in hydraulic breccias, in connection with a mining group composed of three swarm systems of quartz veinlets, veins and sills striking NNW, WNW and N, is exposed in the geological setting related to the Cerro Aspero granitic intrusion located in the eastern part of the Sierra de Comechingones. The region was affected by polimetamorphism during the Pampean and Famatinian cycles. At least two events of simple shearing (D3 and D4) and penetrative structures (S2, S3 and S4) were developed, favouring the anorogenic intrusion of Cerro Aspero batholith since late Devonian. This magmatic event was followed by a reactivation of deformation structures and circulation of hydrothermal fluids through rocks underlying a massive amphibolite level belonging to La Aguada formation, which mainly acted as an impermeable barrier in the area. A maximum stress s1 directed 330° promoted the development of mineralized systems following the fracturing pattern of Riedel's model, and also the development of a principal mineralized path related to a simple dextral shear belt, 285° in direction (S5). During the evolution of the magmatic-hydrothermal system, a high number of stages of fracturing and opening along rocks were registered, with sealing of cavities by mechanism of crack seal and pressure dissolution. By these mechanisms, fibrous habit silica was precipitated and metallic elements were concentrated, under a traction regime and a pore fluid pressure estimated in 195 MPa. The age of one of the mineralizing stages was determined in 343,8 ± 10,8 Ma through K/Ar dating in muscovite. © 2005 Asociación Geológica Argentina.
format	JOUR
author	Mutti, D. González Chiozza, S.
author_facet	Mutti, D. González Chiozza, S.
author_sort	Mutti, D.
title	Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba
title_short	Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba
title_full	Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba
title_fullStr	Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba
title_full_unstemmed	Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba
title_sort	petrotectonic evolution of the cerro aspero mining district and emplacement model of the wolframiferous deposits, córdoba
url	http://hdl.handle.net/20.500.12110/paper_00044822_v60_n1_p159_Mutti
work_keys_str_mv	AT muttid petrotectonicevolutionofthecerroasperominingdistrictandemplacementmodelofthewolframiferousdepositscordoba AT gonzalezchiozzas petrotectonicevolutionofthecerroasperominingdistrictandemplacementmodelofthewolframiferousdepositscordoba
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Petrotectonic evolution of the Cerro Aspero mining district and emplacement model of the wolframiferous deposits, Córdoba

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