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moncheite

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Backscattered electron images of PGMs in the Viol-Py-Ccp assemblage (Style 1). (A) Euhedral rounded moncheite at boundary of violarite and magnetite, (B) small lath-shaped irarsite grains occurring as clusters in silicate, (C) euhedral rounded sperrylite and moncheite in magnetite, (D) atokite intergrown with other Au-Ag alloy and moncheite, (E) Pt-Fe alloy surrounded by moncheite in chalcopyrite, (F) framboidal platinum alloy in a secondary electron image. Abbreviations: Py – pyrite; Vio – violarite; Cp – chalcopyrite; Mgt – magnetite; Sil – silicate; Cal – calcite.

Backscattered electron images of PGMs in the Viol-Py-Ccp assemblage (Style ... Available to Purchase

Published: 13 December 2021
Fig. 8. Backscattered electron images of PGMs in the Viol-Py-Ccp assemblage (Style 1). (A) Euhedral rounded moncheite at boundary of violarite and magnetite, (B) small lath-shaped irarsite grains occurring as clusters in silicate, (C) euhedral rounded sperrylite and moncheite in magnetite, (D
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BSE images of the PGE minerals in sulfide-bearing troctolite from the upper part of the Konnikov Zone (the 13DV554-1-3 and -12 samples) obtained using an ultra-high resolution Hitachi SU-70 FESEM field-emission electron microscope. a, The chains of composite grains composed mainly of moncheite (white) and kotulskite (light gray); b, splicing of moncheite and pentlandite as crystallization products of the iss solution; c, the needle (the cross section of the plate?) of moncheite with inclusions of telargpalite; d, the composite grain of moncheite and kotulskite with inclusions of telargpalite and a fragment of tetraferroplatinum; e, the large moncheite grain with two rims: a submicron rim of nonstoichiometric (probably heterogeneous) Pd-Ag-Pt-Te-Pb-Hg phase along the boundary with a silicate matrix and a two-phase rim comprised of inter-growths of kotulskite and telargpalite at the contact with the Pn-Cub aggregate. Indexation of the of PGE minerals: 1, moncheite Pt(Te, Bi, Pb, Hg)2, 2, kotulskite Pd(Te, Bi, Pb), 3, telargpalite (Pd, Ag)3(Te, Hg), 4, potarite PdHg, and 5, tetraferroplatinum Pt(Fe, Cu).

BSE images of the PGE minerals in sulfide-bearing troctolite from the upper... Available to Purchase

Published: 01 May 2020
of moncheite (white) and kotulskite (light gray); b , splicing of moncheite and pentlandite as crystallization products of the iss solution; c , the needle (the cross section of the plate?) of moncheite with inclusions of telargpalite; d , the composite grain of moncheite and kotulskite with inclusions
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Backscattered electron images of PGMs in Vio-Py-Cp assemblage (Style 2). (A) Oval moncheite at the boundary of violarite and magnetite. (B) Irarsite grains occurring as clusters in silicate. (C) Anhedral lath-shaped irarsite grain in magnetite. (D) Subhedral sperrylite and moncheite in magnetite. (E) Atokite intergrown with other electrum and moncheite. (F) Atokite intergrown with electrum in magnetite. (G) Secondary framboidal native platinum in a secondary electron image. (H) Pt alloy surrounded by moncheite in chalcopyrite. (I) Elongated merenskyite in supergene violarite and magnetite. Abbreviations: Py – pyrite; Vio – violarite; Cp – chalcopyrite; Mgt – magnetite; Sil – silicate; Cal – calcite.

Backscattered electron images of PGMs in Vio-Py-Cp assemblage (Style 2). (A... Available to Purchase

Published: 19 May 2022
Fig. 8. Backscattered electron images of PGMs in Vio-Py-Cp assemblage (Style 2). (A) Oval moncheite at the boundary of violarite and magnetite. (B) Irarsite grains occurring as clusters in silicate. (C) Anhedral lath-shaped irarsite grain in magnetite. (D) Subhedral sperrylite and moncheite
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Compilation of GXMAP, BSE, and SPL images depicting different PGM aggregates in samples 09MOS8011, 10MOS8025_2, and 09MOS8018_1. The locations of the PGM aggregates in the polished sections/GXMAP images are indicated with letters in brackets matching their depicted BSE/SPL images. Note: A legend of the GXMAP/SPL false colors is provided in Table 2. Amp-Px = amphiboles/pyroxenes, Bra = “bravoite”, Cb = carbonates, Cp = chalcopyrite, Ol = olivine, Pn = pentlandite, Py = pyrite (a) Solitary melonite (NiTe2) grain at the grain boundary between quartz and chalcopyrite. (b) Solitary melonite grain within chalcopyrite groundmass. (c) Melonite intergrown with the mixed “merenskyite/moncheite” (Pt,Pd)(Te,Bi)2 phase and Ag minerals at the aggregate boundary within chalcopyrite. (d) PGM aggregate consisting predominantly of merenskyite (PdTe2) and intergrown with melonite and Ag minerals in a chalcopyrite groundmass. (e) Composite PGM aggregate consisting of “merenskyite/moncheite”, melonite, and Ag minerals within a chalcopyrite groundmass. (f) Solitary moncheite (PtTe2) PGM grain at grain boundary of chalcopyrite and amphibole-pyroxene. (g) Large composite PGM aggregate with a core zone of “merenskyite/moncheite” with minute-scale melonite inclusions and a rim including merenskyite and Ag minerals. Same aggregate as in Figure 7a. (h) Large composite PGM aggregate consisting of “merenskyite/moncheite” in the core zone with a rim of merenskyite. (i) Large composite PGM aggregate consisting of “merenskyite/moncheite” with a thick rim of Ag minerals and melonite along the edges.

Compilation of GXMAP, BSE, and SPL images depicting different PGM aggregate... Available to Purchase

Published: 13 December 2021
melonite grain within chalcopyrite groundmass. (c) Melonite intergrown with the mixed “merenskyite/moncheite” (Pt,Pd)(Te,Bi) 2 phase and Ag minerals at the aggregate boundary within chalcopyrite. (d) PGM aggregate consisting predominantly of merenskyite (PdTe 2 ) and intergrown with melonite and Ag
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Backscattered-electron and X-ray images of the compositional zoning of a moncheite grain (a) and a composite grain consisting of moncheite and kotulskite (b).

Backscattered-electron and X-ray images of the compositional zoning of a mo... Available to Purchase

Published: 01 November 2015
Fig. 2. Backscattered-electron and X-ray images of the compositional zoning of a moncheite grain (a) and a composite grain consisting of moncheite and kotulskite (b).
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Pt(+Pd, Ni)–Te–Bi diagram showing the compositional variation (in at.%) of moncheite from the upper part of the Keivitsansarvi deposit. The fields of the reported composition of moncheite and insizwaite [taken from Harney & Merkle (1990)] are drawn for comparison. Symbols: dots: samples from drill core R–695, crosses: samples from drill core R–713, and squares: stoichiometric composition of moncheite and insizwaite.

Pt(+Pd, Ni)–Te–Bi diagram showing the compositional variation (in at.%) of ... Available to Purchase

Published: 01 April 2002
F ig . 4. Pt(+Pd, Ni)–Te–Bi diagram showing the compositional variation (in at.%) of moncheite from the upper part of the Keivitsansarvi deposit. The fields of the reported composition of moncheite and insizwaite [taken from Harney & Merkle (1990) ] are drawn for comparison. Symbols: dots
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MICROPROBE COMPOSITIONS OF MONCHEITE FROM THE SAMAPLEU DEPOSITS (BRGM ORLÉA... Available to Purchase

Published: 13 September 2021
TABLE 9. MICROPROBE COMPOSITIONS OF MONCHEITE FROM THE SAMAPLEU DEPOSITS (BRGM ORLÉANS)
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BSE and element distribution maps: (A) to (E) ‘submarine’-shaped moncheite crystal cutting through pyrrhotite. Note the chlorite alteration along plagioclase-BMS-PGM boundaries as seen in (A). In (C) bismuth is enriched more along the centre of the PGM whereas in (D) the Pt distribution is more homogeneous. (F) and (I) unnamed phase, possibly Fe enriched laurite found at the edge or within pentlandite. Note the zonation of PGM, the inner phase is depleted in Ir (G) and Pt (H). (J) and (K) moncheite found in pyrrhotite, where (J) shows a “worm” shaped moncheite which has flowed/intruded into the pyrrhotite. (L) irarsite found at the borders of chalcopyrite.

BSE and element distribution maps: (A) to (E) ‘submarine’-shaped monche... Available to Purchase

Published: 01 March 2016
Figure 8. BSE and element distribution maps: (A) to (E) ‘submarine’-shaped moncheite crystal cutting through pyrrhotite. Note the chlorite alteration along plagioclase-BMS-PGM boundaries as seen in (A). In (C) bismuth is enriched more along the centre of the PGM whereas in (D) the Pt
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BSE and element distribution maps: (A) to (E) ‘submarine’-shaped moncheite crystal cutting through pyrrhotite. Note the chlorite alteration along plagioclase-BMS-PGM boundaries as seen in (A). In (C) bismuth is enriched more along the centre of the PGM whereas in (D) the Pt distribution is more homogeneous. (F) and (I) unnamed phase, possibly Fe enriched laurite found at the edge or within pentlandite. Note the zonation of PGM, the inner phase is depleted in Ir (G) and Pt (H). (J) and (K) moncheite found in pyrrhotite, where (J) shows a “worm” shaped moncheite which has flowed/intruded into the pyrrhotite. (L) irarsite found at the borders of chalcopyrite.

BSE and element distribution maps: (A) to (E) ‘submarine’-shaped monche... Available to Purchase

Published: 01 March 2016
Figure 8. BSE and element distribution maps: (A) to (E) ‘submarine’-shaped moncheite crystal cutting through pyrrhotite. Note the chlorite alteration along plagioclase-BMS-PGM boundaries as seen in (A). In (C) bismuth is enriched more along the centre of the PGM whereas in (D) the Pt
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SELECTED ANALYSES OF MERENSKYITE, MONCHEITE, AND MELONITE GRAINS FROM THE S... Available to Purchase

Published: 01 March 2016
TABLE 3. SELECTED ANALYSES OF MERENSKYITE, MONCHEITE, AND MELONITE GRAINS FROM THE SULFIDE BLEBS OF THE RUDNIY ULTRAMAFIC-MAFIC INTRUSION (NW MONGOLIA) OBTAINED BY TWO METHODS, wt.%
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(a) Reflected light image (oil immersion) of braggite and moncheite grains (labelled in image) in the MSZ ore of the Great Dyke. (b) Backscatter electron micrograph of euhedral laurite grain intergrown with base-metal sulfides (chalcopyrite and pyrrhotite) from the MSZ. A grain of moncheite (labelled) also occurs. (c) Ternary (PtS–PdS–NiS mol.%) diagram illustrating the range of compositions of cooperite and braggite from pristine and altered (oxidized) MSZ base-metal sulfide ores. Panels (a) and (b) are reproduced from Figures 5a and 5e of Oberthür et al. (2003) and (c) is a reproduction of Figure 7 of that paper. All panels are reproduced with the permission of the author and of Mineralium Deposita.

(a) Reflected light image (oil immersion) of braggite and moncheite grains ... Open Access

Published: 01 January 2016
Figure 7 (a) Reflected light image (oil immersion) of braggite and moncheite grains (labelled in image) in the MSZ ore of the Great Dyke. (b) Backscatter electron micrograph of euhedral laurite grain intergrown with base-metal sulfides (chalcopyrite and pyrrhotite) from the MSZ. A grain
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Edge of large moncheite plate (gray) overgrown by altaite (light gray) and zoned insizwaite (white)–geversite–maslovite. Mooihoekite (black). Oktyabr’skii Mine. BSE image.

Edge of large moncheite plate (gray) overgrown by altaite (light gray) and ... Available to Purchase

Published: 01 September 2010
Fig. 12. Edge of large moncheite plate (gray) overgrown by altaite (light gray) and zoned insizwaite (white)–geversite–maslovite. Mooihoekite (black). Oktyabr’skii Mine. BSE image.
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Photo and X-ray maps of the tabular micro-inclusion of moncheite with an overgrowth of kotulskite(?). Sample PR2–10 (Table 2). The host mineral is pyrrhotite.

Photo and X-ray maps of the tabular micro-inclusion of moncheite with an ov... Available to Purchase

Published: 01 August 2010
F ig . 2. Photo and X-ray maps of the tabular micro-inclusion of moncheite with an overgrowth of kotulskite(?). Sample PR2–10 ( Table 2 ). The host mineral is pyrrhotite.
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Photo and X-ray maps of the acicular complex growth of moncheite (nos. 2, 4 and 6) and kotulskite (nos. 1, 3 and 5). Sample PR1–4 (Table 2).

Photo and X-ray maps of the acicular complex growth of moncheite (nos. 2, 4... Available to Purchase

Published: 01 August 2010
F ig . 5. Photo and X-ray maps of the acicular complex growth of moncheite (nos. 2, 4 and 6) and kotulskite (nos. 1, 3 and 5). Sample PR1–4 ( Table 2 ).
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Photo and X-ray maps of the simple growth of moncheite (no. 1–3) and kotulskite (nos. 5, 6). Sample PR2–1 (Table 2). The host mineral is pyrrhotite.

Photo and X-ray maps of the simple growth of moncheite (no. 1–3) and kotuls... Available to Purchase

Published: 01 August 2010
F ig . 4. Photo and X-ray maps of the simple growth of moncheite (no. 1–3) and kotulskite (nos. 5, 6). Sample PR2–1 ( Table 2 ). The host mineral is pyrrhotite.
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REPRESENTATIVE COMPOSITIONS OF SOBOLEVSKITE, MICHENERITE, MONCHEITE, SOPCHE... Available to Purchase

Published: 01 August 2007
TABLE 2. REPRESENTATIVE COMPOSITIONS OF SOBOLEVSKITE, MICHENERITE, MONCHEITE, SOPCHE1TE, FROODITE AND KOTULSKITE
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Ni–Pd–Pt diagram (atom proportions) for merenskyite and moncheite from the Elatsite deposit.

Ni–Pd–Pt diagram (atom proportions) for merenskyite and moncheite from the ... Available to Purchase

Published: 01 August 2005
F ig . 4. Ni–Pd–Pt diagram (atom proportions) for merenskyite and moncheite from the Elatsite deposit.
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REPRESENTATIVE RESULTS OF ELECTRON-MICROPROBE ANALYSES OF MONCHEITE FROM DR... Available to Purchase

Published: 01 April 2002
TABLE 3. REPRESENTATIVE RESULTS OF ELECTRON-MICROPROBE ANALYSES OF MONCHEITE FROM DRILL CORES R695 AND R713, KEIVITSANSARVI Ni–Cu–PGE DEPOSIT
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Molar proportions of moncheite, merenskyite and melonite from upper part of the Keivitsansarvi deposit plotted in the PtTe2–PdTe2–NiTe2 diagram. Symbols: dots, samples from drill core R–695; crosses, samples from drill core R–713.

Molar proportions of moncheite, merenskyite and melonite from upper part of... Available to Purchase

Published: 01 April 2002
F ig . 3. Molar proportions of moncheite, merenskyite and melonite from upper part of the Keivitsansarvi deposit plotted in the PtTe 2 –PdTe 2 –NiTe 2 diagram. Symbols: dots, samples from drill core R–695; crosses, samples from drill core R–713.
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COMPOSITION OF MELONITE – (MERENSKYITE – MONCHEITE) FROM THE WELLGREEN Ni–C... Available to Purchase

Published: 01 April 2002
TABLE 6. COMPOSITION OF MELONITE – (MERENSKYITE – MONCHEITE) FROM THE WELLGREEN Ni–Cu–PGE DEPOSIT