Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin

14 Figuras, Material Suplementaro

Detalles Bibliográficos
Autores: Schettino, Erwin, González-Jiménez, José María, Saunders, Edward, Hidas, Károly, Gervilla, Fernando, Garrido, Carlos J., Marchesi, Claudio
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/310734
Acceso en línea:http://hdl.handle.net/10261/310734
https://api.elsevier.com/content/abstract/scopus_id/85125420433
Access Level:acceso abierto
Palabra clave:Mediterranean Sea
Feldspar
Metal nanoparticles
Melting
Precipitation (chemical)
Lithospheric mantle
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dc.title.none.fl_str_mv Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
title Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
spellingShingle Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
Schettino, Erwin
Mediterranean Sea
Feldspar
Metal nanoparticles
Melting
Precipitation (chemical)
Lithospheric mantle
title_short Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
title_full Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
title_fullStr Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
title_full_unstemmed Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
title_sort Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basin
dc.creator.none.fl_str_mv Schettino, Erwin
González-Jiménez, José María
Saunders, Edward
Hidas, Károly
Gervilla, Fernando
Garrido, Carlos J.
Marchesi, Claudio
author Schettino, Erwin
author_facet Schettino, Erwin
González-Jiménez, José María
Saunders, Edward
Hidas, Károly
Gervilla, Fernando
Garrido, Carlos J.
Marchesi, Claudio
author_role author
author2 González-Jiménez, José María
Saunders, Edward
Hidas, Károly
Gervilla, Fernando
Garrido, Carlos J.
Marchesi, Claudio
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Junta de Andalucía
European Commission
Ministerio de Ciencia, Innovación y Universidades (España)
Schettino, Erwin [0000-0002-3606-8854]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Mediterranean Sea
Feldspar
Metal nanoparticles
Melting
Precipitation (chemical)
Lithospheric mantle
topic Mediterranean Sea
Feldspar
Metal nanoparticles
Melting
Precipitation (chemical)
Lithospheric mantle
description 14 Figuras, Material Suplementaro
publishDate 2022
dc.date.none.fl_str_mv 2022
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/310734
https://api.elsevier.com/content/abstract/scopus_id/85125420433
url http://hdl.handle.net/10261/310734
https://api.elsevier.com/content/abstract/scopus_id/85125420433
dc.language.none.fl_str_mv Inglés
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099157-A-I00
http://doi.org/10.1130/B36065.1
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dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
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reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
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spelling Metallogenic fingerprint of a metasomatized lithospheric mantle feeding gold endowment in the western Mediterranean basinSchettino, ErwinGonzález-Jiménez, José MaríaSaunders, EdwardHidas, KárolyGervilla, FernandoGarrido, Carlos J.Marchesi, ClaudioMediterranean SeaFeldsparMetal nanoparticlesMeltingPrecipitation (chemical)Lithospheric mantle14 Figuras, Material Suplementaro[EN] Spinel peridotite xenoliths (one plagioclase-bearing) hosted in alkaline basalts from Tallante (southeast Spain) record the mineralogical and geochemical fingerprint of the subcontinental lithospheric mantle (SCLM) evolution beneath the southern Iberian margin. Mantle metasomatism in fertile lherzolites caused the crystallization of clinopyroxene + orthopyroxene + spinel clusters through the percolation of Miocene subalkaline melts during the westward migration of the subduction front in the western Mediterranean. In the Pliocene, heat and volatiles provided by alkaline host-magmas triggered very low melting degrees of metasomatic pyroxene-spinel assemblages, producing melt quenched to silicate glass and reactive spongy coronae around clinopyroxene and spinel. Refertilization of the Tallante peridotites induced the precipitation of base-metal sulfides (BMS) included in metasomatic clino and orthopyroxene. These sulfides consist of pentlandite ± chalcopyrite ± bornite aggregates with homogeneous composition in terms of major elements (Ni, Fe, Cu) and semi-metals (Se, As, Te, Sb, Bi), but with wide variability of platinum-group elements (PGE) fractionation (0.14 < PdN/IrN < 30.74). Heterogeneous PGE signatures, as well as the presence of euhedral Pt-Pd-Sn-rich platinum-group minerals (PGM) and/or Auparticles within BMS, cannot be explained by conventional models of chalcophile partitioning from sulfide melt. Alternatively, we suggest that they reflect the incorporation of distinct populations of BMS, PGM, and metal nanoparticles (especially of Pt, Pd, and Au) during mantle melting and/or melt percolation. Therefore, we conclude that Miocene subalkaline melts released by asthenosphere upwelling upon slab tearing of the Iberian continental margin effectively stored metals in metasomatized domains of this sector of the SCLM. Remarkably high Au concentrations in Tallante BMS (median 1.78 ppm) support that these metasomatized domains provided a fertile source of metals, especially gold, for the ore-productive Miocene magmatism of the westernmost MediterraneanThis research was supported by the BES-2017-079949 Ph.D. fellowship to ES. The Spanish projects PID2019-111715GB-I00/AEI/10.13039/501100011033 and RTI2018-099157-A-I00 provided funding for field emission gun–environmental scanning electron microscopy (FEG-ESEM) and electron microprobe microanalyses (EMPA)/laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) analyses of sulfides, respectively, while the Junta de Andalucía project FUMESA B-RNM-189-UGR18 financed LA-ICP-MS analyses of silicates. Research grants, infrastructures, and human resources leading to this research have benefited from funding by the European Social Fund and the European Regional Development Fund.Peer reviewedGeological Society of AmericaAgencia Estatal de Investigación (España)Junta de AndalucíaEuropean CommissionMinisterio de Ciencia, Innovación y Universidades (España)Schettino, Erwin [0000-0002-3606-8854]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/310734https://api.elsevier.com/content/abstract/scopus_id/85125420433reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement///CGL2016-81085-Rinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-111715GB-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099157-A-I00http://doi.org/10.1130/B36065.1Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3107342026-05-22T06:33:51Z
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