Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.

A mineralogical and mineral chemistry study was carried out in the San Luis Alta telluriderich gold deposit, mid-south Peru, to contribute towards determining its formation and improving the ore processing. The San Luis mineralization is considered an intrusion-related gold deposit located in the Ar...

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Autores: Alfonso Abella, María Pura, Ccolqque, Elsa, Garcia Vallès, Maite, Martinez, Arnau, Yubero, Maria T., Anticoi, Hernan, Sidki-Rius, Nor
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/201882
Acesso em linha:https://hdl.handle.net/2445/201882
Access Level:acceso abierto
Palavra-chave:Mineralogia
Jaciments minerals
Química mineralògica
Perú
Mineralogy
Mineral deposits
Mineralogical chemistry
Peru
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spelling Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.Alfonso Abella, María PuraCcolqque, ElsaGarcia Vallès, MaiteMartinez, ArnauYubero, Maria T.Anticoi, HernanSidki-Rius, NorMineralogiaJaciments mineralsQuímica mineralògicaPerúMineralogyMineral depositsMineralogical chemistryPeruA mineralogical and mineral chemistry study was carried out in the San Luis Alta telluriderich gold deposit, mid-south Peru, to contribute towards determining its formation and improving the ore processing. The San Luis mineralization is considered an intrusion-related gold deposit located in the Arequipa segment of the Coastal Batholith. The mineralization occurs in quartz veins hosted in diorites and granodiorites from the Tiabaya Super-Unit. These veins are sulfide-rich in the deep areas and contain abundant iron oxides. Sulfides are mainly pyrite with minor chalcopyrite and galena. Native gold and telluride minerals are abundant. Mineral chemistry was determined using an electron microprobe. The mineralogy of veins was classified into four stages. Gold occurs in the three last stages either in large grains, visible to the naked eye, or, more frequently, in grains of less than 10 m. Gold appears as grains encapsulated in pyrite, Fe oxides, quartz and filling fractures. The first stage is characterized by the deposition of quartz and massive pyrite, which does not contain gold. During the second stage, hessite, calaverite, petzite and altaite are formed. Additionally, Bi-tellurides, mainly volynskite, rucklidgeite, kochkarite and tellurobusmuthine, are formed. Some of these minerals occur as blebs encapsulated in pyrite, suggesting that a Bi-Te-rich melt was formed from the ore-forming hydrothermal fluid and transported the Au and Ag elements. This stage was followed by a fracturing event and tellurobismuthite, tetradymite and montbrayite precipitated. In the last stage, a supergene replacement formed covellite, bornite and goethite. Te-Bi minerals do not appear in this stage, but selenium minerals occur in minor amounts. Chlorargyrite and iodargyrite occur and are associated with gold.MDPI2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/201882Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3390/min13040568Minerals, 2023, vol. 13, num. 4, p. 568https://doi.org/10.3390/min13040568cc-by (c) Alfonso Abella, María Pura et al., 2023https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2018822026-05-27T06:46:51Z
dc.title.none.fl_str_mv Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
title Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
spellingShingle Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
Alfonso Abella, María Pura
Mineralogia
Jaciments minerals
Química mineralògica
Perú
Mineralogy
Mineral deposits
Mineralogical chemistry
Peru
title_short Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
title_full Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
title_fullStr Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
title_full_unstemmed Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
title_sort Mineralogy and mineral chemistry of the Au-Ag-Te-(Bi-Se) San Luis Alta Deposit, Mid-South Peru.
dc.creator.none.fl_str_mv Alfonso Abella, María Pura
Ccolqque, Elsa
Garcia Vallès, Maite
Martinez, Arnau
Yubero, Maria T.
Anticoi, Hernan
Sidki-Rius, Nor
author Alfonso Abella, María Pura
author_facet Alfonso Abella, María Pura
Ccolqque, Elsa
Garcia Vallès, Maite
Martinez, Arnau
Yubero, Maria T.
Anticoi, Hernan
Sidki-Rius, Nor
author_role author
author2 Ccolqque, Elsa
Garcia Vallès, Maite
Martinez, Arnau
Yubero, Maria T.
Anticoi, Hernan
Sidki-Rius, Nor
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Mineralogia
Jaciments minerals
Química mineralògica
Perú
Mineralogy
Mineral deposits
Mineralogical chemistry
Peru
topic Mineralogia
Jaciments minerals
Química mineralògica
Perú
Mineralogy
Mineral deposits
Mineralogical chemistry
Peru
description A mineralogical and mineral chemistry study was carried out in the San Luis Alta telluriderich gold deposit, mid-south Peru, to contribute towards determining its formation and improving the ore processing. The San Luis mineralization is considered an intrusion-related gold deposit located in the Arequipa segment of the Coastal Batholith. The mineralization occurs in quartz veins hosted in diorites and granodiorites from the Tiabaya Super-Unit. These veins are sulfide-rich in the deep areas and contain abundant iron oxides. Sulfides are mainly pyrite with minor chalcopyrite and galena. Native gold and telluride minerals are abundant. Mineral chemistry was determined using an electron microprobe. The mineralogy of veins was classified into four stages. Gold occurs in the three last stages either in large grains, visible to the naked eye, or, more frequently, in grains of less than 10 m. Gold appears as grains encapsulated in pyrite, Fe oxides, quartz and filling fractures. The first stage is characterized by the deposition of quartz and massive pyrite, which does not contain gold. During the second stage, hessite, calaverite, petzite and altaite are formed. Additionally, Bi-tellurides, mainly volynskite, rucklidgeite, kochkarite and tellurobusmuthine, are formed. Some of these minerals occur as blebs encapsulated in pyrite, suggesting that a Bi-Te-rich melt was formed from the ore-forming hydrothermal fluid and transported the Au and Ag elements. This stage was followed by a fracturing event and tellurobismuthite, tetradymite and montbrayite precipitated. In the last stage, a supergene replacement formed covellite, bornite and goethite. Te-Bi minerals do not appear in this stage, but selenium minerals occur in minor amounts. Chlorargyrite and iodargyrite occur and are associated with gold.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/201882
url https://hdl.handle.net/2445/201882
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3390/min13040568
Minerals, 2023, vol. 13, num. 4, p. 568
https://doi.org/10.3390/min13040568
dc.rights.none.fl_str_mv cc-by (c) Alfonso Abella, María Pura et al., 2023
https://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Alfonso Abella, María Pura et al., 2023
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,223283

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