Hydrothermal Alteration and Mineralization in the Neves-Corvo Volcanic-Hosted Massive Sulfide Deposit, Portugal. II. Oxygen, Hydrogen, and Carbon Isotopes

Relvas, Jorge M. R. S.; Barriga, Fernando J.A.S.; Longstaffe, Fred J.

doi:10.2113/gsecongeo.101.4.791

Cited by 41 publications

(7 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Auclair and Fouquet, 1987; Huston et al ., 1995 b ; Hannington et al ., 1999; Schwarz-Shampera, 2000; Layton-Matthews et al ., 2013), In and Se are mainly associated with Cu-rich ores in the Neves-Corvo deposit, which is consistent with joint transport and co-precipitation of In and Se from high-temperature, acidic, reduced, saline and Cu-rich ore fluids ( cf . Relvas et al ., 2006 a , b ; Huston et al ., 2011). Sphalerite and chalcopyrite are the most important In carriers at Neves-Corvo deposit, their relative importance being a function of the ore types considered.…”

Section: Discussionmentioning

confidence: 99%

“…The footwall hydrothermal alteration zonation recognized at the Neves-Corvo deposit comprises a chlorite (±donbassite)-dominated core (alteration zone I) that is surrounded by a sericite-dominated zone (alteration zone IIa), which becomes richer in sodium towards its peripheral envelope (alteration zone IIb) (Relvas et al ., 2006 a ). The alteration mineralogy, geochemistry and stable isotopes indicate that ore fluids at the Neves-Corvo deposit were hotter and more acidic than typical IPB ore-forming fluids (Relvas et al ., 2006 a , b ).…”

Section: The Neves-corvo Depositmentioning

confidence: 99%

“…The exceptional ore geochemistry and stable isotope signatures, and the uniqueness of some of the radiogenic isotope signatures of the Neves-Corvo ores are consistent with a magmatic-hydrothermal model for the deposit (Relvas et al ., 2001, 2002, 2006 a , b ; Huston et al ., 2011). Furthermore, recent, IPB-like, Sr, Nd and Pb isotope data from the Lombador orebody highlight the equally relevant role of footwall leaching for the metal budget of the deposit (Carvalho, 2016).…”

Section: The Neves-corvo Depositmentioning

confidence: 99%

“…A large, focused, long-lived, multi-sourced magmatic-hydrothermal ore-forming system is thought to have been responsible for this outstanding mineralization. In addition to a major derivation of metals leached from the IPB footwall sequence, which include contributions from an evolved, deep-seated, seawater-derived, metal-rich brine equilibrated with the PQ metasediments, a direct magmatic contribution is envisaged to have been added to the Neves-Corvo metal budget and to have contributed, in different moments of the ore-forming process, to the Sn contents of the deposit, as well as to part of its Cu, In and Se contents (Relvas et al ., 2001, 2006 a , b ; Munhá et al ., 2005; Jorge et al ., 2007; Huston et al ., 2011; Carvalho, 2016).…”

Section: The Neves-corvo Depositmentioning

confidence: 99%

See 3 more Smart Citations

Indium and selenium distribution in the Neves-Corvo deposit, Iberian Pyrite Belt, Portugal

et al. 2018

View full text Add to dashboard Cite

High concentrations of indium (In) and selenium (Se) have been reported in the Neves-Corvo volcanic-hosted massive sulfide deposit, Portugal. The distribution of these ore metals in the deposit is complex as a result of the combined effects of early ore-forming processes and late tectonometamorphic remobilization. The In and Se contents are higher in Cu-rich ore types, and lower in Zn-rich ore types. At the deposit scale, both In and Se correlate positively with Cu, whereas their correlations with Zn are close to zero. This argues for a genetic connection between Cu, In and Se in terms of metal sourcing and precipitation. However, re-distribution and re-concentration of In and Se associated with tectonometamorphic deformation are also processes of major importance for the actual distribution of these metals throughout the whole deposit. Although minor roquesite and other In-bearing phases were recognized, it is clear that most In within the deposit is found incorporated within sphalerite and chalcopyrite. When chalcopyrite and sphalerite coexist, the In content in sphalerite (avg. 1400 ppm) is, on average, 2–3 times higher than in chalcopyrite (avg. 660 ppm). The In content in stannite (avg. 1.3 wt.%) is even higher than in sphalerite, but the overall abundance of stannite is subordinate to either sphalerite or chalcopyrite. Selenium is dispersed widely between many different ore minerals, but galena is the main Se-carrier. On average, the Se content in galena is ~50 times greater than in either chalcopyrite (avg. 610 ppm) or sphalerite (avg. 590 ppm). The copper concentrate produced at Neves-Corvo contains very significant In (+Se) content, well above economic values if the copper smelters recovered it. Moreover, the high In content of sphalerite from some Cu-Zn ores, or associated with shear structures, could possibly justify, in the future, a selective exploitation strategy for the production of an In-rich zinc concentrate.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: The Neves-corvo Depositmentioning

confidence: 99%

Section: The Neves-corvo Depositmentioning

confidence: 99%

Section: The Neves-corvo Depositmentioning

confidence: 99%

See 2 more Smart Citations

Indium and selenium distribution in the Neves-Corvo deposit, Iberian Pyrite Belt, Portugal

et al. 2018

View full text Add to dashboard Cite

show abstract

“…These data were acquired in various deposits of different metamorphic grade and the role of primary enrichment for these elements cannot be clearly established. In Neves-Corvos (Iberian Pyrite Belt, Carvalho et al 2018), indium is primarily incorporated in high-temperature sphalerite and chalcopyrite, but was not lost during recrystallization associated to hydrothermal re-working and/or low-grade tectonometamorphic overprints (Relvas et al 2006;Carvalho et al 2018). Nonetheless, roquesite (CuInS ) locally occurs at sulfide grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Behavior of critical metals in metamorphosed Pb-Zn ore deposits: example from the Pyrenean Axial Zone

et al. 2020

View full text Add to dashboard Cite

Rare metals (Ge, Ga, In, Cd) are key resources for the development of green technologies and are commonly found as trace elements in base-metal mineral deposits. Many of these deposits are in orogenic belts and the impact of recrystallization on rare metal content and distribution in sphalerite needs to be evaluated. Based on laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses, and micro-imaging techniques such as laser-induced breakdown spectroscopy (LIBS) and electron backscattered diffraction (EBSD), we investigate the minor and trace element composition related to sphalerite texture for three types of mineralization from the Pyrenean Axial Zone (PAZ). Vein mineralization (type 2b) appears significantly enriched in Ge and Ga compared to disseminated and stratabound mineralization (type 1 and type 2a, respectively). In vein mineralization, the partial recrystallization induced by deformation led to the remobilization of Ge, Ga, and Cu from the sphalerite crystal lattice into accessory minerals. We propose that the association of intragranular diffusion and fluid-rock reaction were likely responsible for the formation of patchy-oscillatory zoning in

show abstract

Structure and Texture of Pb‐Zn Mineralization

CUGERONE,

CENKI,

OLIOT

et al. 2024

Evolution of the Pyrenees During the Variscan and Alpine Cycles 1

View full text Add to dashboard Cite

Hydrothermal Alteration and Mineralization in the Neves-Corvo Volcanic-Hosted Massive Sulfide Deposit, Portugal. II. Oxygen, Hydrogen, and Carbon Isotopes

Cited by 41 publications

References 61 publications

Indium and selenium distribution in the Neves-Corvo deposit, Iberian Pyrite Belt, Portugal

Indium and selenium distribution in the Neves-Corvo deposit, Iberian Pyrite Belt, Portugal

Behavior of critical metals in metamorphosed Pb-Zn ore deposits: example from the Pyrenean Axial Zone

Structure and Texture of Pb‐Zn Mineralization

Contact Info

Product

Resources

About