Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids

The Pinguino deposit, located in the low sulfidation epithermal metallogenetical province of the Deseado Massif, Patagonia, Argentina, represents a distinct deposit type in the region. It evolved through two different mineralization events: an early In-bearing polymetallic event that introduced In,...

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Autores principales: Jovic, Sebastián Miguel, Guido, Diego Martín, Schalamuk, Isidoro Bernardo Abel, Rios, Francisco Javier, Tassinari Colombo, Celso Gaeta, Recio, Clemente
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Naturales
Polymetallic mineralization
Fluid characterization
Indium
Deseado Massif
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/146514
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-146514
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Polymetallic mineralization
Fluid characterization
Indium
Deseado Massif
Argentina
spellingShingle Ciencias Naturales
Polymetallic mineralization
Fluid characterization
Indium
Deseado Massif
Argentina
Jovic, Sebastián Miguel
Guido, Diego Martín
Schalamuk, Isidoro Bernardo Abel
Rios, Francisco Javier
Tassinari Colombo, Celso Gaeta
Recio, Clemente
Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids
topic_facet Ciencias Naturales
Polymetallic mineralization
Fluid characterization
Indium
Deseado Massif
Argentina
description The Pinguino deposit, located in the low sulfidation epithermal metallogenetical province of the Deseado Massif, Patagonia, Argentina, represents a distinct deposit type in the region. It evolved through two different mineralization events: an early In-bearing polymetallic event that introduced In, Zn, Pb, Ag, Cd, Au, As, Cu, Sn, W and Bi represented by complex sulfide mineralogy, and a late Ag–Au quartz-rich vein type that crosscut and overprints the early polymetallic mineralization. The indium-bearing polymetallic mineralization developed in three stages: an early Cu–Au–In–As–Sn–W–Bi stage (Ps1), a Zn–Pb–Ag–In–Cd–Sb stage (Ps2) and a late Zn–In–Cd (Ps3). Indium concentrations in the polymetallic veins show a wide range (3.4 to 1,184 ppm In). The highest indium values (up to 1,184 ppm) relate to the Ps2 mineralization stage, and are associated with Fe-rich sphalerites, although significant In enrichment (up to 159 ppm) is also present in the Ps1 paragenesis associated with Sn-minerals (ferrokesterite and cassiterite). The hydrothermal alteration associated with the polymetallic mineralization is characterized by advanced argillic alteration within the immediate vein zone, and sericitic alteration enveloping the vein zone. Fluid inclusion studies indicate homogenisation temperatures of 308.2–327°C for Ps1 and 255–312.4°C for Ps2, and low to moderate salinities (2 to 5 eq.wt.% NaCl and 4 to 9 eq.wt.% NaCl, respectively). δ34S values of sulfide minerals (+0.76‰ to +3.61‰) indicate a possible magmatic source for the sulfur in the polymetallic mineralization while Pb isotope ratios for the sulfides and magmatic rocks (206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb ratios of 17.379 to 18.502; 15.588 to 15.730 and 38.234 to 38.756, respectively) are consistent with the possibility that the Pb reservoirs for both had the same crustal source. Spatial relationships, hydrothermal alteration styles, S and Pb isotopic data suggest a probable genetic relation between the polymetallic mineralization and dioritic intrusions that could have been the source of metals and hydrothermal fluids. Mineralization paragenesis, alteration mineralogy, geochemical signatures, fluid inclusion data and isotopic data, confirm that the In-bearing polymetallic mineralization from Pinguino deposit is a distinct type, in comparison with the well-known epithermal low sulfidation mineralization from the Deseado Massif.
format Articulo
Articulo
author Jovic, Sebastián Miguel
Guido, Diego Martín
Schalamuk, Isidoro Bernardo Abel
Rios, Francisco Javier
Tassinari Colombo, Celso Gaeta
Recio, Clemente
author_facet Jovic, Sebastián Miguel
Guido, Diego Martín
Schalamuk, Isidoro Bernardo Abel
Rios, Francisco Javier
Tassinari Colombo, Celso Gaeta
Recio, Clemente
author_sort Jovic, Sebastián Miguel
title Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids
title_short Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids
title_full Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids
title_fullStr Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids
title_full_unstemmed Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids
title_sort pingüino in-bearing polymetallic vein deposit, deseado massif, patagonia, argentina: characteristics of mineralization and ore-forming fluids
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/146514
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