Maucherite from metamorphic-hydrothermal assemblages of the Noril’sk ore field

Gritsenko, Yu. D.; Spiridonov, E. M.

doi:10.1134/s1075701508070106

Cited by 9 publications

(7 citation statements)

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“…The small segregations of this mineral are frequently observed in the metamorphosed sulfide ore with abundant bornite and in association with parkerite. The chemical composition of this mineral is as follows, wt %: 8 Pd-bearing breithauptite. Small segregations of this mineral replace geversite and froodite at the contact with pentlandite adjacent to parkerite.…”

Section: Analyses 3 and 4)mentioning

confidence: 99%

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Metamorphic-hydrothermal parkerite and associated minerals in the Noril’sk ore field

2008

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Magmatic mineralization.Fe-Cu-Ni-Co sulfides are disseminated near the bottom and in other portions of the ore-bearing intrusions and make up massive orebodies, veins, and impregnations mainly in the lower contact zone of igneous rocks and in the adjacent wall rocks. The primary sulfide ore is composed of segregations of pyrrhotite-and chalcopyrite-group minerals; cubanite and pentlandite; products of solid-state modifications of the early hexagonal Mss = (Fe,Ni,Cu…)S and the late cubic Iss = (Fe,Cu,Ni…)S sulfide solid solutions crystallized from sulfide melts; and of magnetite. The mineral composition of the primary ore ranges from pentlandite-troilite-pyrrhotite through pentlandite-pyrrhotite-cubanite and pentlandite-cubanite to pentlandite-chalcopyrite; chalcopyrite-group minerals with excess metal (talnakhite, mooihoekite, and putoranite) are abundant in the central and upper parts of sulfide orebodies (Godlevsky, 1959;Kulagov, 1968;Filimonova et al., 1974;Filimonova and Evstigneeva, 1980;Genkin et al., 1981).Crosscutting veins composed of PbSss (galenaaltaite solid solution)-Iss graphic intergrowths, i.e., the products of crystallization of the late low-temperature Pb-Fe-Cu melts, are hosted in the primary sulfide orebodies and along their contacts with country hornfels and igneous rocks and are regarded as a characteristic feature of the Noril'sk ore field. Further, these sulfide solid solutions underwent exsolution with formation of galena containing lamellae of altaite and chalcopyrite, talnakhite, or mooihoekite with lamellae and other exsolution bodies of cubanite, pentlandite, and pyrrhoAbstract -In the Noril'sk ore field, parkerite is a characteristic mineral of sulfide ore that metamorphosed under conditions of zeolite and prehnite-pumpellyite facies and of arsenide-calcite veins. The mineral occurs in ores containing bornite, anhydrite, magnetite, mackinawite (3-5 wt % Ni), valleriite, calcite, ankerite, native silver, native bismuth, violarite, Te-rich bismutohauchecornite, cupropentlandite enriched in Fe, Pd-rich breithauptite (1.5-2.5 wt % Pd), galena enriched in Cu (3.8 wt % Cu), and Ni arsenides and antimonides. Parkerite occurs in those place, where the primary ores have contained pockets and veins of graphic galena and chalcopyrite aggregates with associated Pt-Pd-Au-Ag minerals. Parkerite metacrysts in galena and Fe-Cu-Ni sulfides contain 6-16 and up to 5 wt % Pb, respectively. Parkerite rims replacing PGM aggregates and galena contain 1-3 wt % Pb. In calcite veins hosted in metamorphosed sulfide ores, parkerite is associated with native silver and bismuth, maucherite, cobaltite, chalcocite, and uraninite. Parkerite from these veins contains up to 0.5 wt % Pb. Thus, the Pb and Bi contents in parkerite basically depend on those of replaced minerals. Rare bismutohauchecornite is associated with parkerite.

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Section: Analyses 3 and 4)mentioning

confidence: 99%

“…The Rb/Sr age of apophyllite coeval with Table 1. Chemical composition of parkerite from metamorphosed sulfide ores (1-6) and anhydrite-calcite veins (7)(8) in the Noril'sk ore field, wt % Component …”

Section: Introductionmentioning

confidence: 99%

Metamorphic-hydrothermal parkerite and associated minerals in the Noril’sk ore field

2008

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“…At more than 9 wt.% Co, or roughly 2 apfu Co, this composition far surpasses what is normally encountered: ≤1.2 wt.% Co (e.g. Fleet, 1973 a ; Wagner and Lorenz, 2002; Makovicky and Merlino, 2009) and, occasionally, up to 3.1–3.9 wt.% Co (Petruk et al , 1971; Gritsenko and Spiridonov, 2008; Raič et al , 2015).…”

Section: Introductionmentioning

confidence: 79%

“…In experiments, the extent of Pd-enrichment increases with decreasing temperature, to attain 5.5 at.% Pd at 450°C (Gervilla et al , 1994). Elevated contents, up to 1.5–1.8 wt.% Pd, are known in grains of maucherite from the Sudbury, Canada and Noril'sk, Russia complexes (Cabri and Laflamme, 1976; Gritsenko and Spiridonov, 2008). In addition, maucherite is one of the principal arsenides deposited from melts rich in As under experimental and natural conditions (Prichard et al , 2013).…”

Section: Background Informationmentioning

confidence: 99%

“…Arsenic-rich melts segregated experimentally via immiscibility from sulfide melts are capable of efficiently scavenging the initially dissolved PGE, especially Pd (Fleet et al ., 1993; Makovicky et al , 1992). Elevated contents of Cu (and S), up to ~5 wt.% each, were documented in grains of maucherite from metamorphosed Cu–Ni ores of the Noril'sk complex, Russia (Gritsenko and Spiridonov, 2008).…”

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confidence: 99%

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Ognitite, NiBiTe, a new mineral species, and Co-rich maucherite from the Ognit ultramafic complex, Eastern Sayans, Russia

Barkov

Bindi

Tamura

et al. 2019

MinMag

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We describe the new species ognitite, NiBiTe, and a Co-rich variety of maucherite, hitherto unreported; both were discovered in the Ognit ultramafic complex of Neoproterozoic age in Eastern Sayans, Russia. The mean composition of ognitite (n = 7) is: Ni 17.05, Fe 0.07, Cu 0.14, Pd 0.14, Te 32.53, Bi 49.64, total 99.57 wt.%, corresponding to: (Ni1.11Cu0.008Fe0.005Pd0.005)Σ1.13Bi0.90Te0.97 (Σ atoms = 3 apfu). Ognitite is trigonal, space group P3m1 [R1 = 0.0276 for 81 reflections with Fo > 4σ(Fo)]. The unit-cell parameters derived from the single-crystal X-ray diffraction data are: a = 3.928(1) Å, c = 5.385(1) Å and V = 71.95(4) Å3, with Z = 1. The c:a ratio is 1.37. The powder X-ray diffraction data obtained on the same fragment used for the single-crystal study are: a = 3.9332(4) Å, c = 5.3920(6) Å and V = 72.24(1) Å3. Ognitite exhibits the brucite-type structure with edge-sharing NiTe3Bi3 octahedra forming sheets parallel to (0001). It is related to melonite, but is distinct compositionally by the extreme Bi-enrichment (melonite and its synthetic analogue contain <0.4 Bi apfu), and structurally as Bi and Te are ordered at two distinct sites, leading to the loss of the centre of symmetry in ognitite.At more than 9 wt.% Co, or ~2 apfu Co, the core of Co-rich maucherite [(Ni,Co)11As8] in a zoned crystal, which is surrounded by Co-depleted orcelite, far surpasses the norm (≤1 and up to 3.9 wt.% Co). The unit-cell parameters of the Co-rich maucherite are: a = 6.85(2) and c = 21.83(5) Å, which are based on results of synchrotron micro-Laue diffraction.The host rock consists of serpentine, clinochlore (Mg# 95–97) and skeletal chromite. We favour the metastable crystallisation of fluid-saturated globules of a sulfide–arsenide melt to explain the anomalous compositions of ore minerals at Ognit. These anomalies seem consistent with rapid cooling in a fluid-enriched system, possibly related to late-stage degassing of the magma, as reflected in a prominent metasomatic aureole at the contact with the enclosing gneissic rocks.

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Fractionation of platinum, palladium, nickel, and copper in sulfide–arsenide systems at magmatic temperature

Helmy

Ballhaus

Fonseca

et al. 2013

Contrib Mineral Petrol

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Maucherite from metamorphic-hydrothermal assemblages of the Noril’sk ore field

Cited by 9 publications

References 1 publication

Metamorphic-hydrothermal parkerite and associated minerals in the Noril’sk ore field

Metamorphic-hydrothermal parkerite and associated minerals in the Noril’sk ore field

Ognitite, NiBiTe, a new mineral species, and Co-rich maucherite from the Ognit ultramafic complex, Eastern Sayans, Russia

Fractionation of platinum, palladium, nickel, and copper in sulfide–arsenide systems at magmatic temperature

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