The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza

Autores
Mugas Lobos, Ana Cecilia; Marquez Zavalia, Maria Florencia; Galliski, Miguel Angel; Wälle, Markus
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Don Sixto is a 252.7±1.3 Ma, low sulfidation epithermal Au deposit located in Mendoza, Argentina. The mineralization in this area (~4 km2) reaches a gold resource of 1,258,000 ounces, occurring as Au-quartz veins and Au-dissemination in volcanic-pyroclastic units closely related to the Choiyoi magmatism. Seven stages of mineralization were recognized, where quartz is the major gangue mineral with lesser adularia and fluorite (± calcite). The most representative vein textures are massive, crustiform and comb. Bladed quartz together with adularia (± calcite) were recognized in the stages 2 and 4. Abundant pyrite and lesser arsenopyrite, chalcopyrite and sphalerite were recognized in most stages. Gold has variable fineness and occurs mainly in the stage 4, together with scarce uytenbogaardtite, acanthite and Se- and Te-bearing minerals. Microthermometry data indicate that mineralizing fluids were diluted (<5.16 wt. %ClNaequiv) with average homogenization temperatures reaching <316.0 ºC. LA-ICP-MS results indicate that the highest values of Na, K and S were reached in the stage 4 and 5, closely related to boiling conditions in the former. In general, a limited data set was obtained due to the small size of the fluid inclusions and the low signals that prevented analysis, which are common characteristics of low sulfidation deposits. The stable isotope data δ18OH2O indicate a major meteoric water source for the oxygen in the fluids. Regarding δ34S, the preliminary value does not define a unique source; instead a mixed one is feasible between magmatic source and a possible contribution from the sedimentary Agua Escondida Formation.
Fil: Mugas Lobos, Ana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Marquez Zavalia, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Galliski, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Wälle, Markus. ETH Zurich; Suiza
Materia
Mineralogy
quartz veins
fluid inclusions
LA-ICP-MS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/87320
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, MendozaDon Sixto, un depósito de Au de baja sulfuración del Pérmico-Triásico, MendozaMugas Lobos, Ana CeciliaMarquez Zavalia, Maria FlorenciaGalliski, Miguel AngelWälle, MarkusMineralogyquartz veinsfluid inclusionsLA-ICP-MShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Don Sixto is a 252.7±1.3 Ma, low sulfidation epithermal Au deposit located in Mendoza, Argentina. The mineralization in this area (~4 km2) reaches a gold resource of 1,258,000 ounces, occurring as Au-quartz veins and Au-dissemination in volcanic-pyroclastic units closely related to the Choiyoi magmatism. Seven stages of mineralization were recognized, where quartz is the major gangue mineral with lesser adularia and fluorite (± calcite). The most representative vein textures are massive, crustiform and comb. Bladed quartz together with adularia (± calcite) were recognized in the stages 2 and 4. Abundant pyrite and lesser arsenopyrite, chalcopyrite and sphalerite were recognized in most stages. Gold has variable fineness and occurs mainly in the stage 4, together with scarce uytenbogaardtite, acanthite and Se- and Te-bearing minerals. Microthermometry data indicate that mineralizing fluids were diluted (<5.16 wt. %ClNaequiv) with average homogenization temperatures reaching <316.0 ºC. LA-ICP-MS results indicate that the highest values of Na, K and S were reached in the stage 4 and 5, closely related to boiling conditions in the former. In general, a limited data set was obtained due to the small size of the fluid inclusions and the low signals that prevented analysis, which are common characteristics of low sulfidation deposits. The stable isotope data δ18OH2O indicate a major meteoric water source for the oxygen in the fluids. Regarding δ34S, the preliminary value does not define a unique source; instead a mixed one is feasible between magmatic source and a possible contribution from the sedimentary Agua Escondida Formation.Fil: Mugas Lobos, Ana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Marquez Zavalia, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Galliski, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Wälle, Markus. ETH Zurich; SuizaAsociación Geológica Argentina2018-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/87320Mugas Lobos, Ana Cecilia; Marquez Zavalia, Maria Florencia; Galliski, Miguel Angel; Wälle, Markus; The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza; Asociación Geológica Argentina; Revista de la Asociación Geológica Argentina; 75; 3; 7-2018; 441-4530004-4822CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://ppct.caicyt.gov.ar/index.php/raga/article/view/11202/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:53Zoai:ri.conicet.gov.ar:11336/87320instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:06:53.799CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
Don Sixto, un depósito de Au de baja sulfuración del Pérmico-Triásico, Mendoza
title The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
spellingShingle The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
Mugas Lobos, Ana Cecilia
Mineralogy
quartz veins
fluid inclusions
LA-ICP-MS
title_short The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
title_full The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
title_fullStr The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
title_full_unstemmed The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
title_sort The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza
dc.creator.none.fl_str_mv Mugas Lobos, Ana Cecilia
Marquez Zavalia, Maria Florencia
Galliski, Miguel Angel
Wälle, Markus
author Mugas Lobos, Ana Cecilia
author_facet Mugas Lobos, Ana Cecilia
Marquez Zavalia, Maria Florencia
Galliski, Miguel Angel
Wälle, Markus
author_role author
author2 Marquez Zavalia, Maria Florencia
Galliski, Miguel Angel
Wälle, Markus
author2_role author
author
author
dc.subject.none.fl_str_mv Mineralogy
quartz veins
fluid inclusions
LA-ICP-MS
topic Mineralogy
quartz veins
fluid inclusions
LA-ICP-MS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Don Sixto is a 252.7±1.3 Ma, low sulfidation epithermal Au deposit located in Mendoza, Argentina. The mineralization in this area (~4 km2) reaches a gold resource of 1,258,000 ounces, occurring as Au-quartz veins and Au-dissemination in volcanic-pyroclastic units closely related to the Choiyoi magmatism. Seven stages of mineralization were recognized, where quartz is the major gangue mineral with lesser adularia and fluorite (± calcite). The most representative vein textures are massive, crustiform and comb. Bladed quartz together with adularia (± calcite) were recognized in the stages 2 and 4. Abundant pyrite and lesser arsenopyrite, chalcopyrite and sphalerite were recognized in most stages. Gold has variable fineness and occurs mainly in the stage 4, together with scarce uytenbogaardtite, acanthite and Se- and Te-bearing minerals. Microthermometry data indicate that mineralizing fluids were diluted (<5.16 wt. %ClNaequiv) with average homogenization temperatures reaching <316.0 ºC. LA-ICP-MS results indicate that the highest values of Na, K and S were reached in the stage 4 and 5, closely related to boiling conditions in the former. In general, a limited data set was obtained due to the small size of the fluid inclusions and the low signals that prevented analysis, which are common characteristics of low sulfidation deposits. The stable isotope data δ18OH2O indicate a major meteoric water source for the oxygen in the fluids. Regarding δ34S, the preliminary value does not define a unique source; instead a mixed one is feasible between magmatic source and a possible contribution from the sedimentary Agua Escondida Formation.
Fil: Mugas Lobos, Ana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Marquez Zavalia, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Galliski, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Wälle, Markus. ETH Zurich; Suiza
description Don Sixto is a 252.7±1.3 Ma, low sulfidation epithermal Au deposit located in Mendoza, Argentina. The mineralization in this area (~4 km2) reaches a gold resource of 1,258,000 ounces, occurring as Au-quartz veins and Au-dissemination in volcanic-pyroclastic units closely related to the Choiyoi magmatism. Seven stages of mineralization were recognized, where quartz is the major gangue mineral with lesser adularia and fluorite (± calcite). The most representative vein textures are massive, crustiform and comb. Bladed quartz together with adularia (± calcite) were recognized in the stages 2 and 4. Abundant pyrite and lesser arsenopyrite, chalcopyrite and sphalerite were recognized in most stages. Gold has variable fineness and occurs mainly in the stage 4, together with scarce uytenbogaardtite, acanthite and Se- and Te-bearing minerals. Microthermometry data indicate that mineralizing fluids were diluted (<5.16 wt. %ClNaequiv) with average homogenization temperatures reaching <316.0 ºC. LA-ICP-MS results indicate that the highest values of Na, K and S were reached in the stage 4 and 5, closely related to boiling conditions in the former. In general, a limited data set was obtained due to the small size of the fluid inclusions and the low signals that prevented analysis, which are common characteristics of low sulfidation deposits. The stable isotope data δ18OH2O indicate a major meteoric water source for the oxygen in the fluids. Regarding δ34S, the preliminary value does not define a unique source; instead a mixed one is feasible between magmatic source and a possible contribution from the sedimentary Agua Escondida Formation.
publishDate 2018
dc.date.none.fl_str_mv 2018-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/87320
Mugas Lobos, Ana Cecilia; Marquez Zavalia, Maria Florencia; Galliski, Miguel Angel; Wälle, Markus; The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza; Asociación Geológica Argentina; Revista de la Asociación Geológica Argentina; 75; 3; 7-2018; 441-453
0004-4822
CONICET Digital
CONICET
url http://hdl.handle.net/11336/87320
identifier_str_mv Mugas Lobos, Ana Cecilia; Marquez Zavalia, Maria Florencia; Galliski, Miguel Angel; Wälle, Markus; The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza; Asociación Geológica Argentina; Revista de la Asociación Geológica Argentina; 75; 3; 7-2018; 441-453
0004-4822
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://ppct.caicyt.gov.ar/index.php/raga/article/view/11202/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Asociación Geológica Argentina
publisher.none.fl_str_mv Asociación Geológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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