Geochronological and geochemical constraints on the genesis of Cu-Au skarn deposits of the Santa María de la Paz district (Sierra del Fraile, Mexico)

Cu-Au skarn deposits of the mining district of Santa María de La Paz are located in the Sierra del Fraile, in the northern part of San Luis Potosí, Mexico. Samples of four different intrusions and their related skarn deposits were taken underground, in order to obtain whole-rock and mineral geochemi...

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Autor principal: Siesgesmund, S.
Otros Autores: López-Doncel, R., Sieck, P., Wilke, H., Wemmer, K., Frei, D., Oriolo, S.
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Publicado: Elsevier B.V. 2018
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100 1 |a Siesgesmund, S. 
245 1 0 |a Geochronological and geochemical constraints on the genesis of Cu-Au skarn deposits of the Santa María de la Paz district (Sierra del Fraile, Mexico) 
260 |b Elsevier B.V.  |c 2018 
270 1 0 |m Oriolo, S.; CONICET-Universidad de Buenos Aires. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA), Intendente Güiraldes 2160, Argentina; email: soriolo@gl.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a Cu-Au skarn deposits of the mining district of Santa María de La Paz are located in the Sierra del Fraile, in the northern part of San Luis Potosí, Mexico. Samples of four different intrusions and their related skarn deposits were taken underground, in order to obtain whole-rock and mineral geochemical data. U-Pb LA-ICP-MS zircon data indicate crystallization ages of ca. 37.6–35.0 Ma for skarn-related granitic and granodioritic stocks, which show dominant metaluminous to slightly peraluminous, high-K calc-alkaline compositions. These intrusions were emplaced in a post-Laramide continental arc setting under shallow conditions, as suggested by fast cooling inferred from K-Ar biotite ages of ca. 35–33 Ma. Skarn deposits were contemporaneous with emplacement and crystallization of stocks, as revealed by Re-Os molybdenite geochronological data of exoskarn rocks. Skarn rocks show a general depletion of LILE and REE and a slightly enrichment in HFSE in comparison with intrusive rocks. Pyroxene and garnet show dominant hedenbergite and andradite compositions, respectively. The association of hedenbergite, pyrite, chalcopyrite, native bismuth and pyrrhotite during skarn mineralization suggest reducing conditions, typical for Au but not for Cu skarns. Highest metal contents are concentrated in exoskarn rocks, including anomalies of Cu, Fe, Ni, Sn, Sb, Zn, W and Bi. Metal contents, ore minerals and environmental conditions of skarn rocks, together with whole-rock geochemical data of stocks and pyroxene-garnet compositions, reveal some singularities for the Sierra del Fraile deposits, as they exhibit characteristics of both Cu and Au skarn deposits but might be also compatible with Fe, W, and Zn skarns. Hence, skarn and associated vein deposits of the Sierra del Fraile might have a high potential not only for Cu-Au, but also for several base metals, as reported for comparable post-Laramide skarn and hydrothermal deposits of central and northern Mexico. © 2018 Elsevier B.V.  |l eng 
536 |a Detalles de la financiación: Consejo Nacional de Ciencia y Tecnología, CB 130282 
536 |a Detalles de la financiación: Observations of two anonymous reviewers as well as the editorial work of F. Pirajno and J. González-Jiménez are greatly acknowledged. The authors wish to thank A. Kronz for supervising microprobe analysis, K. Simon for ICP-MS geochemical data and M. Brauns for Re-Os molybdenite geochronological data. The authors are also grateful to the MSc Manuel González Ochoa and Negociación Minera de Santa Maria La Paz y Anexas for the logistical support and the facilities granted to work and take samples at the mine, and to the CONACyT (Project CB 130282) for the financial support. N. Rubinstein, A. Gómez and M. N. Maffini are acknowledged for fructiferous comments. Appendix A 
593 |a Geoscience Centre, Georg-August-Universität Göttingen, Goldschmidtstraße 3, Göttingen, 37077, Germany 
593 |a Instituto de Geología, Universidad Autónoma de San Luis Potosí, Av. Manuel Nava 5, San Luis Potosí, 78240, Mexico 
593 |a División de Geociencias Aplicadas, Instituto Potosino de Investigación Científica y Tecnológica (IPICyT), Camino a la Presa San José 2055, Lomas 4° Sección, San Luis Potosí, 78216, Mexico 
593 |a Department of Earth Sciences, University of the Western Cape, Private Bag X17, Bellville, 7530, South Africa 
593 |a Department of Earth Sciences, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa 
593 |a CONICET-Universidad de Buenos Aires. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA), Intendente Güiraldes 2160, C1428EHA Buenos Aires, Argentina 
690 1 0 |a ANDRADITE-HEDENBERGITE SKARN 
690 1 0 |a CU-AU MINERALIZATION 
690 1 0 |a EOCENE 
690 1 0 |a ORE DEPOSITS 
690 1 0 |a POST-LARAMIDE MAGMATISM 
690 1 0 |a RE-OS GEOCHRONOLOGY 
690 1 0 |a BINARY ALLOYS 
690 1 0 |a COPPER 
690 1 0 |a COPPER ALLOYS 
690 1 0 |a COPPER COMPOUNDS 
690 1 0 |a DEPOSITS 
690 1 0 |a GARNETS 
690 1 0 |a GEOCHEMISTRY 
690 1 0 |a GEOCHRONOLOGY 
690 1 0 |a GOLD 
690 1 0 |a GOLD ALLOYS 
690 1 0 |a GOLD DEPOSITS 
690 1 0 |a LEAD ALLOYS 
690 1 0 |a MINERALOGY 
690 1 0 |a ORE DEPOSITS 
690 1 0 |a OSMIUM ALLOYS 
690 1 0 |a PYRITES 
690 1 0 |a RHENIUM ALLOYS 
690 1 0 |a ROCKS 
690 1 0 |a SILICATE MINERALS 
690 1 0 |a ZIRCON 
690 1 0 |a CRYSTALLIZATION AGE 
690 1 0 |a ENVIRONMENTAL CONDITIONS 
690 1 0 |a EOCENE 
690 1 0 |a GEOCHEMICAL DATA 
690 1 0 |a HEDENBERGITE 
690 1 0 |a HYDROTHERMAL DEPOSITS 
690 1 0 |a MAGMATISMS 
690 1 0 |a REDUCING CONDITIONS 
690 1 0 |a POTASSIUM COMPOUNDS 
690 1 0 |a AGE DETERMINATION 
690 1 0 |a ANDRADITE 
690 1 0 |a COPPER 
690 1 0 |a CRYSTALLIZATION 
690 1 0 |a EMPLACEMENT 
690 1 0 |a EOCENE 
690 1 0 |a GEOCHEMISTRY 
690 1 0 |a GEOCHRONOLOGY 
690 1 0 |a GOLD 
690 1 0 |a HEDENBERGITE 
690 1 0 |a HYDROTHERMAL DEPOSIT 
690 1 0 |a MAGMATISM 
690 1 0 |a ORE DEPOSIT 
690 1 0 |a SKARN 
690 1 0 |a SIERRA DEL FRAILE 
690 1 0 |a POTOS 
650 1 7 |2 spines  |a MICA 
650 1 7 |2 spines  |a PETROGENESIS 
651 4 |a MEXICO [NORTH AMERICA] 
651 4 |a SAN LUIS POTOSI 
700 1 |a López-Doncel, R. 
700 1 |a Sieck, P. 
700 1 |a Wilke, H. 
700 1 |a Wemmer, K. 
700 1 |a Frei, D. 
700 1 |a Oriolo, S. 
773 0 |d Elsevier B.V., 2018  |g v. 94  |h pp. 310-325  |p Ore Geol. Rev.  |x 01691368  |w (AR-BaUEN)CENRE-342  |t Ore Geology Reviews 
856 4 1 |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-85044677730&doi=10.1016%2fj.oregeorev.2018.02.010&partnerID=40&md5=cdb084de2504da9c8582257f127a7025  |y Registro en Scopus 
856 4 0 |u https://doi.org/10.1016/j.oregeorev.2018.02.010  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_01691368_v94_n_p310_Siesgesmund  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01691368_v94_n_p310_Siesgesmund  |y Registro en la Biblioteca Digital 
961 |a paper_01691368_v94_n_p310_Siesgesmund  |b paper  |c PE 
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999 |c 86192