The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization

This is a post-peer-review, pre-copyedit version of an article published in Mineralium deposita. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00126-014-0556-x.

Detalles Bibliográficos
Autores: Rajabi, Abdorrahman, Rastad, Ebrahim, Canet Miquel, Carles, Alfonso Abella, María Pura|||0000-0002-1515-4999
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/181148
Acceso en línea:https://hdl.handle.net/2117/181148
https://dx.doi.org/10.1007/s00126-014-0556-x
Access Level:acceso abierto
Palabra clave:Mineralogy -- Iran
Hydrothermal vents
Sulfur -- Isotopes
Sulfate reduction
Posht-e-Badam Block
Sulfur isotopes
Fluid inclusions
Pyrite framboids
Sedex
Western brooks range
Fluid inclusion
Mcarthur basin
Stable-isotope
Marine sulfate
Ag deposits
Australia
Pyrite
Mineralogia -- Iran
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Mineralogia
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spelling The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralizationRajabi, AbdorrahmanRastad, EbrahimCanet Miquel, CarlesAlfonso Abella, María Pura|||0000-0002-1515-4999Mineralogy -- IranHydrothermal ventsSulfur -- IsotopesSulfate reductionHydrothermal ventsPosht-e-Badam BlockSulfur isotopesFluid inclusionsPyrite framboidsSedexWestern brooks rangeSulfate reductionFluid inclusionSulfur isotopesMcarthur basinStable-isotopeMarine sulfateAg depositsAustraliaPyriteMineralogia -- IranÀrees temàtiques de la UPC::Enginyeria civil::Geologia::MineralogiaThis is a post-peer-review, pre-copyedit version of an article published in Mineralium deposita. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00126-014-0556-x.The Chahmir zinc-lead deposit (1.5 Mt @ 6 % Zn + 2 % Pb) in Central Iran is one among several sedimentary-exhalative Zn-Pb deposits in the Early Cambrian Zarigan-Chahmir basin (e.g., Koushk, Darreh-Dehu, and Zarigan). The deposit is hosted by carbonaceous, fine-grained black siltstones, and shales interlayered with volcaniclastic sandstone beds. It corresponds to the upper part of the Early Cambrian volcano-sedimentary sequence (ECVSS), which was deposited on the Posht-e-Badam Block during back-arc rifting of the continental margin of Central Iran. Based on crosscutting relationships, mineralogy, and texture of sulfide mineralization, four different facies can be distinguished: stockwork (feeder zone), massive ore, bedded ore, and distal facies (exhalites with barite). Silicification, carbonatization, sericitization, and chloritization are the main wall-rock alteration styles; alteration intensity increases toward the proximal feeder zone. Fluid inclusion microthermometry was carried out on quartz associated with sulfides of the massive ore. Homogenization temperatures are in the range of 170-226 A degrees C, and salinity is around 9 wt% NaCl eq. The size distribution of pyrite framboids of the bedded ore facies suggests anoxic to locally suboxic event for the host basin. delta S-34((V-CDT)) values of pyrite, sphalerite, and galena range from +10.9 to +29.8 aEuro degrees. The highest delta S-34 values correspond to the bedded ore (+28.6 to +29.8 aEuro degrees), and the lowest to the massive ore (+10.9 to +14.7 aEuro degrees) and the feeder zone (+11.3 and +12.1 aEuro degrees). The overall range of delta S-34 is consistent with a sedimentary environment where sulfide sulfur was derived from two sources. One of them was corresponding to early ore-stage sulfides in bedded ore and distal facies, consistent with bacterial reduction from coeval seawater sulfate in a closed or semiclosed basin. However, the delta S-34 values of late ore-stage sulfides, observed mainly in massive ore, interpreted as a hydrothermal sulfur component, leached from the lower part of the ECVSS. Sulfur isotopes, along with the sedimentological, textural, mineralogical, fluid inclusion, and geochemical characteristics of the Chahmir deposit are in agreement with a vent-proximal (Selwyn type) SEDEX ore deposit model.Peer Reviewed20152015-06-0120202020-03-24journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/181148https://dx.doi.org/10.1007/s00126-014-0556-xreponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1811482026-05-27T15:37:01Z
dc.title.none.fl_str_mv The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
title The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
spellingShingle The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
Rajabi, Abdorrahman
Mineralogy -- Iran
Hydrothermal vents
Sulfur -- Isotopes
Sulfate reduction
Hydrothermal vents
Posht-e-Badam Block
Sulfur isotopes
Fluid inclusions
Pyrite framboids
Sedex
Western brooks range
Sulfate reduction
Fluid inclusion
Sulfur isotopes
Mcarthur basin
Stable-isotope
Marine sulfate
Ag deposits
Australia
Pyrite
Mineralogia -- Iran
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Mineralogia
title_short The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
title_full The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
title_fullStr The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
title_full_unstemmed The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
title_sort The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization
dc.creator.none.fl_str_mv Rajabi, Abdorrahman
Rastad, Ebrahim
Canet Miquel, Carles
Alfonso Abella, María Pura|||0000-0002-1515-4999
author Rajabi, Abdorrahman
author_facet Rajabi, Abdorrahman
Rastad, Ebrahim
Canet Miquel, Carles
Alfonso Abella, María Pura|||0000-0002-1515-4999
author_role author
author2 Rastad, Ebrahim
Canet Miquel, Carles
Alfonso Abella, María Pura|||0000-0002-1515-4999
author2_role author
author
author
dc.subject.none.fl_str_mv Mineralogy -- Iran
Hydrothermal vents
Sulfur -- Isotopes
Sulfate reduction
Hydrothermal vents
Posht-e-Badam Block
Sulfur isotopes
Fluid inclusions
Pyrite framboids
Sedex
Western brooks range
Sulfate reduction
Fluid inclusion
Sulfur isotopes
Mcarthur basin
Stable-isotope
Marine sulfate
Ag deposits
Australia
Pyrite
Mineralogia -- Iran
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Mineralogia
topic Mineralogy -- Iran
Hydrothermal vents
Sulfur -- Isotopes
Sulfate reduction
Hydrothermal vents
Posht-e-Badam Block
Sulfur isotopes
Fluid inclusions
Pyrite framboids
Sedex
Western brooks range
Sulfate reduction
Fluid inclusion
Sulfur isotopes
Mcarthur basin
Stable-isotope
Marine sulfate
Ag deposits
Australia
Pyrite
Mineralogia -- Iran
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Mineralogia
description This is a post-peer-review, pre-copyedit version of an article published in Mineralium deposita. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00126-014-0556-x.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-06-01
2020
2020-03-24
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/181148
https://dx.doi.org/10.1007/s00126-014-0556-x
url https://hdl.handle.net/2117/181148
https://dx.doi.org/10.1007/s00126-014-0556-x
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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