Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province

Autores
Tassara, Santiago; Rooney, Alan D.; Ague, Jay. J.; Guido, Diego Martin; Reich, Martin; Barra, Fernando; Navarrete Granzotto, César Rodrigo
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The formation of crustal blocks enriched with gold (Au) deposits above subduction zones is intimately bound to the genesis and evolution of magmatic-hydrothermal systems. A longstanding question, however, is whether the metal fertility of these systems stems from distinct sources that are anomalously enriched in Au or from subsequent processes occurring during crustal magma emplacement and hydrothermal activity. The Deseado Massif auriferous province in southern Patagonia (Argentina) is a unique place to test these contrasting hypotheses because Au-bearing mantle xenoliths indicate the presence of an underlying Au-rich lithospheric mantle reservoir. However, direct geochemical links between the Au-rich mantle source and the formation of the Deseado Massif auriferous province in the overlying crust remain to be established. To address this prominent gap in knowledge, we used sulfide Re-Os geochronology to identify the source of Au at Cerro Vanguardia, the largest low-sulfidation epithermal Au-Ag deposit in the Deseado Massif. Pyrite from high-grade Au quartz veins yielded an isochron age of 147.4 ± 2.9 Ma (mean square of weighted deviates = 1.04, n = 8) and an initial 187Os/188Os ratio of 0.26 ± 0.01, fingerprinting a dominant mantle control for the source of Os and, by inference, the source of Au. Our data provide a unique geochemical linkage between an Au-rich subcontinental lithospheric mantle source and the genesis of epithermal Au deposits, supporting the hypothesis that pre-enriched mantle domains may be a critical factor underpinning the global-scale localization of Au provinces.
Fil: Tassara, Santiago. University of Yale; Estados Unidos
Fil: Rooney, Alan D.. University of Yale; Estados Unidos
Fil: Ague, Jay. J.. University of Yale; Estados Unidos
Fil: Guido, Diego Martin. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Recursos Minerales. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Recursos Minerales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Reich, Martin. Universidad de Chile; Chile
Fil: Barra, Fernando. Universidad de Chile; Chile
Fil: Navarrete Granzotto, César Rodrigo. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Epithermal
Jurassic
Osmium
Metalogeny
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:11336/223729
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/223729
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold provinceTassara, SantiagoRooney, Alan D.Ague, Jay. J.Guido, Diego MartinReich, MartinBarra, FernandoNavarrete Granzotto, César RodrigoEpithermalJurassicOsmiumMetalogenyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The formation of crustal blocks enriched with gold (Au) deposits above subduction zones is intimately bound to the genesis and evolution of magmatic-hydrothermal systems. A longstanding question, however, is whether the metal fertility of these systems stems from distinct sources that are anomalously enriched in Au or from subsequent processes occurring during crustal magma emplacement and hydrothermal activity. The Deseado Massif auriferous province in southern Patagonia (Argentina) is a unique place to test these contrasting hypotheses because Au-bearing mantle xenoliths indicate the presence of an underlying Au-rich lithospheric mantle reservoir. However, direct geochemical links between the Au-rich mantle source and the formation of the Deseado Massif auriferous province in the overlying crust remain to be established. To address this prominent gap in knowledge, we used sulfide Re-Os geochronology to identify the source of Au at Cerro Vanguardia, the largest low-sulfidation epithermal Au-Ag deposit in the Deseado Massif. Pyrite from high-grade Au quartz veins yielded an isochron age of 147.4 ± 2.9 Ma (mean square of weighted deviates = 1.04, n = 8) and an initial 187Os/188Os ratio of 0.26 ± 0.01, fingerprinting a dominant mantle control for the source of Os and, by inference, the source of Au. Our data provide a unique geochemical linkage between an Au-rich subcontinental lithospheric mantle source and the genesis of epithermal Au deposits, supporting the hypothesis that pre-enriched mantle domains may be a critical factor underpinning the global-scale localization of Au provinces.Fil: Tassara, Santiago. University of Yale; Estados UnidosFil: Rooney, Alan D.. University of Yale; Estados UnidosFil: Ague, Jay. J.. University of Yale; Estados UnidosFil: Guido, Diego Martin. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Recursos Minerales. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Recursos Minerales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Reich, Martin. Universidad de Chile; ChileFil: Barra, Fernando. Universidad de Chile; ChileFil: Navarrete Granzotto, César Rodrigo. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaGeological Society of America2022-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/223729Tassara, Santiago; Rooney, Alan D.; Ague, Jay. J.; Guido, Diego Martin; Reich, Martin; et al.; Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province; Geological Society of America; Geology; 50; 11; 9-2022; 1291-12950091-7613CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/geology/article/doi/10.1130/G50045.1/616599/Osmium-isotopes-fingerprint-mantle-controls-on-theinfo:eu-repo/semantics/altIdentifier/doi/10.1130/G50045.1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-17T11:03:49Zoai:ri.conicet.gov.ar:11336/223729instacron: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:34982025-09-17 11:03:50.096CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
title Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
spellingShingle Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
Tassara, Santiago
Epithermal
Jurassic
Osmium
Metalogeny
title_short Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
title_full Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
title_fullStr Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
title_full_unstemmed Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
title_sort Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province
dc.creator.none.fl_str_mv Tassara, Santiago
Rooney, Alan D.
Ague, Jay. J.
Guido, Diego Martin
Reich, Martin
Barra, Fernando
Navarrete Granzotto, César Rodrigo
author Tassara, Santiago
author_facet Tassara, Santiago
Rooney, Alan D.
Ague, Jay. J.
Guido, Diego Martin
Reich, Martin
Barra, Fernando
Navarrete Granzotto, César Rodrigo
author_role author
author2 Rooney, Alan D.
Ague, Jay. J.
Guido, Diego Martin
Reich, Martin
Barra, Fernando
Navarrete Granzotto, César Rodrigo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Epithermal
Jurassic
Osmium
Metalogeny
topic Epithermal
Jurassic
Osmium
Metalogeny
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The formation of crustal blocks enriched with gold (Au) deposits above subduction zones is intimately bound to the genesis and evolution of magmatic-hydrothermal systems. A longstanding question, however, is whether the metal fertility of these systems stems from distinct sources that are anomalously enriched in Au or from subsequent processes occurring during crustal magma emplacement and hydrothermal activity. The Deseado Massif auriferous province in southern Patagonia (Argentina) is a unique place to test these contrasting hypotheses because Au-bearing mantle xenoliths indicate the presence of an underlying Au-rich lithospheric mantle reservoir. However, direct geochemical links between the Au-rich mantle source and the formation of the Deseado Massif auriferous province in the overlying crust remain to be established. To address this prominent gap in knowledge, we used sulfide Re-Os geochronology to identify the source of Au at Cerro Vanguardia, the largest low-sulfidation epithermal Au-Ag deposit in the Deseado Massif. Pyrite from high-grade Au quartz veins yielded an isochron age of 147.4 ± 2.9 Ma (mean square of weighted deviates = 1.04, n = 8) and an initial 187Os/188Os ratio of 0.26 ± 0.01, fingerprinting a dominant mantle control for the source of Os and, by inference, the source of Au. Our data provide a unique geochemical linkage between an Au-rich subcontinental lithospheric mantle source and the genesis of epithermal Au deposits, supporting the hypothesis that pre-enriched mantle domains may be a critical factor underpinning the global-scale localization of Au provinces.
Fil: Tassara, Santiago. University of Yale; Estados Unidos
Fil: Rooney, Alan D.. University of Yale; Estados Unidos
Fil: Ague, Jay. J.. University of Yale; Estados Unidos
Fil: Guido, Diego Martin. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Recursos Minerales. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Recursos Minerales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Reich, Martin. Universidad de Chile; Chile
Fil: Barra, Fernando. Universidad de Chile; Chile
Fil: Navarrete Granzotto, César Rodrigo. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The formation of crustal blocks enriched with gold (Au) deposits above subduction zones is intimately bound to the genesis and evolution of magmatic-hydrothermal systems. A longstanding question, however, is whether the metal fertility of these systems stems from distinct sources that are anomalously enriched in Au or from subsequent processes occurring during crustal magma emplacement and hydrothermal activity. The Deseado Massif auriferous province in southern Patagonia (Argentina) is a unique place to test these contrasting hypotheses because Au-bearing mantle xenoliths indicate the presence of an underlying Au-rich lithospheric mantle reservoir. However, direct geochemical links between the Au-rich mantle source and the formation of the Deseado Massif auriferous province in the overlying crust remain to be established. To address this prominent gap in knowledge, we used sulfide Re-Os geochronology to identify the source of Au at Cerro Vanguardia, the largest low-sulfidation epithermal Au-Ag deposit in the Deseado Massif. Pyrite from high-grade Au quartz veins yielded an isochron age of 147.4 ± 2.9 Ma (mean square of weighted deviates = 1.04, n = 8) and an initial 187Os/188Os ratio of 0.26 ± 0.01, fingerprinting a dominant mantle control for the source of Os and, by inference, the source of Au. Our data provide a unique geochemical linkage between an Au-rich subcontinental lithospheric mantle source and the genesis of epithermal Au deposits, supporting the hypothesis that pre-enriched mantle domains may be a critical factor underpinning the global-scale localization of Au provinces.
publishDate 2022
dc.date.none.fl_str_mv 2022-09
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/11336/223729
Tassara, Santiago; Rooney, Alan D.; Ague, Jay. J.; Guido, Diego Martin; Reich, Martin; et al.; Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province; Geological Society of America; Geology; 50; 11; 9-2022; 1291-1295
0091-7613
CONICET Digital
CONICET
url http://hdl.handle.net/11336/223729
identifier_str_mv Tassara, Santiago; Rooney, Alan D.; Ague, Jay. J.; Guido, Diego Martin; Reich, Martin; et al.; Osmium isotopes fingerprint mantle controls on the genesis of an epithermal gold province; Geological Society of America; Geology; 50; 11; 9-2022; 1291-1295
0091-7613
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/geology/article/doi/10.1130/G50045.1/616599/Osmium-isotopes-fingerprint-mantle-controls-on-the
info:eu-repo/semantics/altIdentifier/doi/10.1130/G50045.1
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
application/pdf
dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
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 13.000565

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