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14. Distribution of hypogene alteration and fluid evolution in the Los Humeros Geothermal Field (Puebla, Mexico): Multiple sourced fluids, interrelations, and processes in a superhot system

Author

González-Partida, Eduardo, Camprubí, Antoni, López-Hernández, Aída, Santoyo, Edgar, Izquierdo-Montalvo, Georgina, Pandarinath, Kailasa, Yáñez-Dávila, David, González-Ruiz, Luis E., González-Ruiz, Daniel, Díaz-Carreño, Erik, and Juárez-Hilarios, Elidee

Published
2022
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26. The Trans-Crustal Evolution of Miocene Magmatism Parental to Epithermal Mineralization in the Sierra Madre del Sur, Southern Mexico.

Author

Cano, Néstor, Martiny, Barbara M, Camprubí, Antoni, González-Partida, Eduardo, Schaaf, Peter, Ortega-Obregón, Carlos, and Solís-Pichardo, Gabriela

Subjects
ANDESITE, FELSIC rocks, METALLOGENY, MAGMATISM, MIOCENE Epoch, PLAGIOCLASE
Abstract

Arc-related volcanism results from the interplay of magmatic processes occurring in trans-crustal systems that consolidate over time in a given location. Trans-crustal systems comprise extensive networks of magma reservoirs and conduits at different depths, wherein melts cyclically differentiate and segregate before reaching the surface. The study of these systems provides valuable insights into crustal-scale phenomena, such as the evolution of the continental crust and the formation of metallogenic regions. In this study, we address the trans-crustal magmatic evolution of lower Miocene magmatism parental to several intermediate-sulfidation epithermal deposits in the eastern Sierra Madre del Sur igneous province, southern Mexico. Using a multi-methodological approach, we document changes over ca. 1.1 Myr in the magmatic system that fed andesitic-to-felsic volcanism in this region. We employ whole-rock REE ratios and λ parameters—which are used to quantify the shape of a REE pattern—to track the involvement of pressure-sensitive minerals in the deep-crustal magmatic evolution. The andesitic rocks consist of lava flows, porphyries, and dikes that collectively show REE patterns suggestive of control by fractionated or residual (i.e. in crustal melting) amphibole and/or clinopyroxene. In contrast, the felsic rocks consist of rhyolitic–dacitic ignimbrites, domes, and dikes that show contrasting REE patterns suggestive of control by plagioclase, clinopyroxene, amphibole, and/or garnet. The distinct pressure-sensitive mineral assemblages in the andesitic and felsic rocks indicate that the locus of deep-crustal magma evolution varied within the middle–lower crust. These magmas were episodically injected into ephemeral shallow crustal reservoirs (shortly?) before being erupted, inducing a progressive thermomechanical maturation of the middle–upper crust. Meanwhile, low degrees of crustal assimilation occurred as recorded by Mesozoic inherited zircon ages and Sr–Nd–Pb radiogenic isotopes. An extensive middle–lower crustal magma evolution has been linked to the formation of porphyry Cu deposits (i.e. 'fertile' magmatism). Given that intermediate-sulfidation epithermal deposits may be genetically linked with porphyry Cu deposits, the documented processes could have contributed to the formation of epithermal deposits in the region. However, magmatic fertility proxies resemble those from infertile magmas worldwide. Since these proxies have been exclusively applied to porphyry-type deposits, our results highlight the importance of developing new geochemical exploration tools applicable to a wider range of ore deposits. [ABSTRACT FROM AUTHOR]

Published
2024
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34. The Tatatila–Las Minas IOCG skarn (Veracruz, Mexico): Mineralogical, fluid inclusion and stable isotope constraints

Author

Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. RIIS - Grup de Recerca en Recursos i Indústries Intel·ligents i Sostenibles, Fuentes Guzmán, Edith, Camprubí Cano, Antoni, González Partida, Eduardo, Hernández Avilés, Geovanny, Alfonso Abella, María Pura, Cienfuegos Alvarado, Edith, Mesino Hernández, Juan Carlos, Ortega Obregón, Carlos, Otero Trujano, Francisco Javier, Vázquez Ramírez, Juan Tomás, Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. RIIS - Grup de Recerca en Recursos i Indústries Intel·ligents i Sostenibles, Fuentes Guzmán, Edith, Camprubí Cano, Antoni, González Partida, Eduardo, Hernández Avilés, Geovanny, Alfonso Abella, María Pura, Cienfuegos Alvarado, Edith, Mesino Hernández, Juan Carlos, Ortega Obregón, Carlos, Otero Trujano, Francisco Javier, and Vázquez Ramírez, Juan Tomás

Abstract

This paper stems from the dissertations of E.F.G., G.H.A. and, partly, J.C.M.H., who acknowledge the support of CONACyT through their respective PhD (E.F.G.) and MSc grants (G.H.A. and J.C.M.H.). Funding for this work was provided by CONACyT through the research grants 155662 to A.C. and “GEMex: Cooperación México-Europa para la investigación de sistemas geotérmicos mejorados y sistemas geotérmicos supercalientes”, Peer Reviewed, Objectius de Desenvolupament Sostenible::12 - Producció i Consum Responsables, Postprint (author's final draft)

Published
2023

35. Metallogenic model of the Eocene Santa María and Antares Zn-Pb(-Ag) skarn deposits, Velardeña Mining District, Durango, Mexico

Author

Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. RIIS - Grup de Recerca en Recursos i Indústries Intel·ligents i Sostenibles, Cano, Néstor Alfredo, Camprubí Cano, Antoni, González Partida, Eduardo, González-Ambrocio, Ana Karen, Alfonso Abella, María Pura, Miggins, Daniel, Fuentes Guzmán, Edith, Cienfuegos Alvarado, Edith, Iriondo, Alexander, Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. RIIS - Grup de Recerca en Recursos i Indústries Intel·ligents i Sostenibles, Cano, Néstor Alfredo, Camprubí Cano, Antoni, González Partida, Eduardo, González-Ambrocio, Ana Karen, Alfonso Abella, María Pura, Miggins, Daniel, Fuentes Guzmán, Edith, Cienfuegos Alvarado, Edith, and Iriondo, Alexander

Abstract

The Santa María and Antares Zn-Pb(-Ag) skarn deposits in the Velardeña Mining District are located in central–NW Mexico. They lie 470 m apart along the contact between Oligocene felsic intrusions and Cretaceous limestones, and were developed during prograde, retrograde, post-ore (Santa María), and late stages. Firstly, the prograde stage was formed by fluids at¿~¿600 °C and 15 wt% NaCl equiv., and consists of garnet¿+¿wollastonite¿±¿clinopyroxene and biotite¿±¿K-feldspar assemblages. Secondly, the retrograde/ore stage was formed by fluids at 300–500 °C with salinities of 20–30 wt% CaCl2 (Santa María) and¿>¿40 wt% NaCl equiv. (Antares). It comprises assemblages of chlorite, amphibole, epidote, calcite, scapolite, quartz, sericite, adularia, fluorite, and muscovite associated with sphalerite, pyrite, galena, pyrrhotite, arsenopyrite, chalcopyrite, and Pb-Bi-Sb sulfosalts. Thirdly, the post-ore stage was formed by fluids at¿~¿400 °C and 20–30 wt.% CaCl2 and comprises poorly mineralized calcite veins. Fourthly, the late stage was formed by fluids at¿<¿300 °C and 20–30 wt.% CaCl2 (Santa María) and¿~¿15 wt% NaCl equiv. (Antares), and crystallized tetrahedrite-group minerals and pyrite¿+¿marcasite. d18Ofluid between¿~¿14‰ and 23‰ at Santa María and between¿~¿12‰ and 17‰ at Antares show a less-modified magmatic affinity for mineralizing fluids at Antares; d13Cfluid between 0‰ and –6‰ register recycling of sedimentary C. Moreover, sulfides with d34SVCDT between –3‰ and 2‰ reveal a magmatic source for S. Altogether, these data suggest that, at Santa María, magmatic-derived fluids actively interacted with the wall rocks, whereas at Antares the fluid-rock interaction was milder. In both deposits, metal deposition was triggered by the cooling and neutralization of ore-bearing fluids with carbonate rocks. Our 40Ar/39Ar dates for adularia of ca. 37.5 Ma place the deposits within the Eocene–early Miocene metallogenetic epoch of central–NW Mexico, during which other world-class skar, The Consejo Nacional de Humanidades, Ciencia y Teconología (CONAHCyT) supported N.C. with a grant during his M.Sc. studies, and this paper constitutes a substantial part of his associated research. This study was financially supported by means of personal allocations to UNAM academicians. Additional funding was provided by the CONACyT-SENER PT. 4.1 Gemex-EU research grant to E.G.P., and CONACyT-Ciencia Básica A1-S-14574 and PAPIIT IA-101419 research grants to Vanessa Colás Ginés (Departamento de Ciencias de la Tierra, University of Zaragoza)., Peer Reviewed, Postprint (published version)

Published
2023

38. Tiempos de acumulación de carbón en México con especial énfasis en la Cuenca de Sabinas México, donde se proporcionan nuevos datos geocronológicos

Author

González-Partida, Eduardo, primary, González-Betancourt, Aurea Yahaira, primary, Camprubí, Antoni, primary, Carrillo-Chávez, Alejandro, primary, Iriondo, Alexander, primary, Enciso-Cárdenas, Juan Josué, primary, González Carrillo, Fabiola, primary, and Vázquez Ramírez, Juan Tomás, primary

Published
2022
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44. El depósito de oro supracretácico La Felipeña en el extremo oriental del batolito de las Sierras Peninsulares (Baja California, México): Estudio preliminar.

Author

Lazcano, Javier, Camprubí, Antoni, González-Partida, Eduardo, Iriondo, Alexander, and Miggins, Daniel P.

Subjects
MUSCOVITE, OROGENIC belts, GEOLOGICAL time scales, VEINS (Geology), METALLOGENY, BATHOLITHS, RADIOACTIVE dating, FLUID inclusions
Abstract

Copyright of Boletín de la Sociedad Geológica Mexicana is the property of Sociedad Geologica Mexicana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023
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