THE COMPOSITION OF Co-Ni-Fe SULFARSENIDES, DIARSENIDES AND TRIARSENIDES FROM THE SAN JUAN DE PLAN DEPOSIT, CENTRAL PYRENEES, SPAIN

Fanlo, Isabel; Pérez, Ignacio Subías; Gervilla, Fernando; Paniagua, A.; García, Belén Seral

doi:10.2113/gscanmin.42.4.1221

Cited by 31 publications

(6 citation statements)

References 14 publications

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“…pyrite, arsenopyrite, sphalerite, molybdenite and fahlores) [41][42][43]. Oscillatory zoning in gersdorffite was reported from the San Juan de Plan deposit, Spain [44], the high-grade Ni-Co-Fe-As hydrothermal vein ores from Dobšiná (Slovakia) [45], and from Pb-Ag-Zn deposits within the Rogozna ore field, Serbo-Macedonian metallogenic province [46]. The oscillatory variations in As, Ni, and Fe content of individual micro-zones observed within the Clemence gersdorffite suggest physical or chemical fluctuations within the bulk system and disequilibrium in the ore fluids [47].…”

Section: Discussionmentioning

confidence: 99%

The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece

et al. 2018

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Vein-type Pb-Ni-Bi-Au-Ag mineralization at the Clemence deposit in the Kamariza and “km3” in the Lavrion area, was synchronous with the intrusion of a Miocene granodiorite body and related felsic and mafic dikes and sills within marbles and schists in the footwall of (and within) the Western Cycladic detachment system. In the Serpieri deposit (Kamariza area), a porphyry-style pyrrhotite-arsenopyrite mineralized microgranitic dike is genetically related to a garnet-wollastonite bearing skarn characterized by a similar base metal and Ni (up to 219 ppm) enrichment. The Ni–Bi–Au association in the Clemence deposit consists of initial deposition of pyrite and arsenopyrite followed by an intergrowth of native gold-bismuthinite and oscillatory zoned gersdorffite. The zoning is related to variable As, Ni, and Fe contents, indicating fluctuations of arsenic and sulfur fugacity in the hydrothermal fluid. A late evolution towards higher sulfur fugacity in the mineralization is evident by the deposition of chalcopyrite, tennantite, enargite, and galena rimming gersdorffite. At the “km3” locality, Ni sulfides and sulfarsenides, vaesite, millerite, ullmannite, and polydymite, are enclosed in gersdorffite and/or galena. The gersdorffite is homogenous and contains less Fe (up to 2 wt.%) than that from the Clemence deposit (up to 9 wt.%). Bulk ore analyses of the Clemence ore reveal Au and Ag grades both exceeding 100 g/t, Pb and Zn > 1 wt.%, Ni up to 9700 ppm, Co up to 118 ppm, Sn > 100 ppm, and Bi > 2000 ppm. The “km3” mineralization is enriched in Mo (up to 36 ppm), Ni (>1 wt.%), and Co (up to 1290 ppm). Our data further support a magmatic contribution to the ore-forming fluids, although remobilization and leaching of metals from previous mineralization and/or host rocks, through the late involvement of non-magmatic fluid in the ore system, cannot be excluded.

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Section: Discussionmentioning

confidence: 99%

The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece

et al. 2018

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“…In various ore deposits, a wide range of temperatures have been proposed for the crystallization of cobaltite-gersdorffite solid solutions, extending from magmatic to low-temperature hydrothermal (e.g. Szentpéteri et al, 2002;Fanlo et al, 2004;Dare et al, 2010;Prichard et al, 2013;Nimis et al, 2014), which is consistent with experimental data (Klemm, 1965, Makovicky et al, 1990. The compositions of cobaltite at Rio Jacaré plot in a Co-rich part of the system CoAsS-NiAsS-FeAsS, similar to late zones (marginal) of zoned grains of PGE-bearing sulfarsenides from Mt.…”

Section: Crystal-chemical and Genetic Implicationsmentioning

confidence: 99%

Coupled substitutions in PGE-enriched cobaltite: new evidence from the Rio Jacaré layered complex, Bahia state, Brazil

Barkov

Fedortchouk

Campbell³

et al. 2015

Mineral. mag.

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Microcrystals of platinum-group element (PGE)-bearing cobaltite occur in the Gulcari A deposit of vanadiferous titanomagnetite in the lower zone of the Rio Jacaré mafic-ultramafic layered intrusion, Brazil. Aggregates of cobaltite and sperrylite are cluster-like and developed generally along the boundary of Fe-Ti oxide grains with deuteric silicates. Our observations of cryptic zoning, compositional variability and interelement correlations are based on 37 analytical points (wavelength-dispersion spectrometry mode) of cobaltite, and indicate that Ir and Rh behave uniformly with Ni and antipathetically with Co which, in turn, correlates directly with S content. Iridium, Rh and Ni apparently substitute for Co in the As-enriched grain core, and the substitution mechanism invokes solid solution with a cattierite-type molecule: (Ni + Ir + Rh) + (AsS) = Co + (S2). The PGE-bearing cobaltite probably crystallized as a primary phase at 500 to 300°C, from microvolumes of a late fluid phase. The observed enrichment in S and decrease in the As:S ratio at the cobaltite grain margins is a reflection of the increase in sulfur fugacity (fS2) with decrease in temperature of crystallization.

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“…Oscillatory zoning is common in sulfides (e.g., pyrite, arsenopyrite, sphalerite, molybdenite and fahlores; Plotinskaya et al [32], Deditius et al [33], Grabezhev and Voudouris [34]). Oscillatory zoning in gersdorffite has been reported from the San Juan de Plan deposit in Spain [35], the highgrade Ni-Co-Fe-As hydrothermal vein ores from Dobšiná (Slovakia) [36], and from Pb(Ag)-Zn deposits within the Rogozna ore field, Serbo-Macedonian metallogenic province [37].…”

Section: Discussionmentioning

confidence: 96%

<strong>The Ni-Bi-Au association at Kamariza and ‘km-3’, Lavrion ore district, Greece</strong>

Galanos

Voudouris

Rieck

et al. 2018

Proceedings of the 1st International Electronic Conference on Mineral Science

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Vein-type Pb-Ni-Bi-Au-Ag mineralization at Clemence mine in Kamariza and the Km 3 locality in the Lavrion area was synchronous with the intrusion of a Miocene granodiorite body and related felsic and mafic dykes and sills within marbles and schists that constitute the footwall of the Western Cycladic Detachment System. The Ni-Bi-Au association at Clemence mine consists of initial deposition of pyrite and arsenopyrite followed by an intergrowth of native gold-bismuthinite and oscillatory zoned gersdorffite. Oscillatory zoning in gersdorffite is related to variable As, Ni and Fe contents, indicating fluctuation of arsenic and sulfur fugacity in the hydrothermal fluid. A late evolution towards higher sulfur fugacity in the mineralization is evident by the deposition of chalcopyrite, tennantite, enargite and galena rimming gersdorffite. At the Km 3 locality, the observed Ni sulfides and sulfarsenides, vaesite, millerite, ullmannite and polydymite, are enclosed in gersdorffite and/or galena. The gersdorffite is homogenous and contain less Fe (up to 2 wt %) than that from the Clemence mine (up to 9 wt %). Bulk analyses for Clemence ore reveal Au and Ag grades exceeding both 100 g/t, Pb and Zn > 1 wt %, Ni up to 9700 ppm, Co up to 118 ppm, Sn > 100 ppm and Bi > 2000 ppm. The Km 3 mineralization is enriched in Mo (up to 36 ppm), Ni (>1 wt %) and Co (up to 1290 ppm). Despite local variations, both districts are characterized by a common fluid evolution similar to the broad Lavrion area.

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THE COMPOSITION OF Co-Ni-Fe SULFARSENIDES, DIARSENIDES AND TRIARSENIDES FROM THE SAN JUAN DE PLAN DEPOSIT, CENTRAL PYRENEES, SPAIN

Cited by 31 publications

References 14 publications

The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece

The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece

Coupled substitutions in PGE-enriched cobaltite: new evidence from the Rio Jacaré layered complex, Bahia state, Brazil

<strong>The Ni-Bi-Au association at Kamariza and ‘km-3’, Lavrion ore district, Greece</strong>

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THE COMPOSITION OF Co-Ni-Fe SULFARSENIDES, DIARSENIDES AND TRIARSENIDES FROM THE SAN JUAN DE PLAN DEPOSIT, CENTRAL PYRENEES, SPAIN

Cited by 31 publications

References 14 publications

The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece

The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece

Coupled substitutions in PGE-enriched cobaltite: new evidence from the Rio Jacaré layered complex, Bahia state, Brazil

<strong>The Ni-Bi-Au association at Kamariza and &lsquo;km-3&rsquo;, Lavrion ore district, Greece</strong>

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<strong>The Ni-Bi-Au association at Kamariza and ‘km-3’, Lavrion ore district, Greece</strong>