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isoferroplatinum

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Journal Article

Inclusions in an isoferroplatinum nugget from the Freetown Layered Complex, Sierra Leone Available to Purchase

John F. W. Bowles, Saioa Suárez, Hazel M. Prichard, Peter C. Fisher
Published: 01 June 2018
Mineralogical Magazine (2018) 82 (3): 577–592.
DOI: https://doi.org/10.1180/mgm.2018.85
...John F. W. Bowles; Saioa Suárez; Hazel M. Prichard; Peter C. Fisher ABSTRACT Inclusions of platinum-group minerals (PGM) within alluvial isoferroplatinum nuggets from the Freetown Peninsula, Sierra Leone, are aligned with their shape determined by the structure of their host. The edges...
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View PDF for article title, Inclusions in an <span class="search-highlight">isoferroplatinum</span> nugget from the Freetown Layered Complex, Sierra Leone
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Isoferroplatinum-pyrrhotite-troilite intergrowth as evidence of desulfurization in the Merensky Reef at Rustenburg (western Bushveld Complex, South Africa) Available to Purchase

Alexander Kawohl, Hartwig E. Frimmel
Published: 01 October 2016
Mineralogical Magazine (2016) 80 (6): 1041–1053.
DOI: https://doi.org/10.1180/minmag.2016.080.055
...Alexander Kawohl; Hartwig E. Frimmel Abstract Petrographic and mineralogical studies of samples of the Normal (or undisturbed) Merensky Reef from Frank Shaft No.1 at Rustenburg Platinum Mine revealed the presence of a Pt-Fe-alloy, probably isoferroplatinum (58 vol.% of total precious metal minerals...
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View PDF for article title, <span class="search-highlight">Isoferroplatinum</span>-pyrrhotite-troilite intergrowth as evidence of desulfurization in the Merensky Reef at Rustenburg (western Bushveld Complex, South Africa)
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Journal Article

Atom probe tomography of isoferroplatinum Available to Purchase

Stephen W. Parman, David R. Diercks, Brian P. Gorman, Reid F. Cooper
Published: 01 April 2015
American Mineralogist (2015) 100 (4): 852–860.
DOI: https://doi.org/10.2138/am-2015-4998
...Stephen W. Parman; David R. Diercks; Brian P. Gorman; Reid F. Cooper Abstract Here we apply the relatively new analytical technique of atom probe tomography (APT) to a naturally occurring isoferroplatinum grain (Pt 3 Fe) from northern California to constrain its origin and the nanoscale...
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View PDF for article title, Atom probe tomography of <span class="search-highlight">isoferroplatinum</span>
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Journal Article

INCLUSIONS OF RUTHENIAN RUTILE AND TITANIAN RuO 2 IN ISOFERROPLATINUM NUGGETS FROM FINNISH LAPLAND Available to Purchase

Pekka Tuisku
Published: 01 April 2012
The Canadian Mineralogist (2012) 50 (2): 511–521.
DOI: https://doi.org/10.3749/canmin.50.2.511
...Pekka Tuisku Abstract Rutile, ruthenian rutile and titanian ruthenium dioxide inclusions were found in isoferroplatinum nuggets obtained as by-products of gold sluicing in the historical gold-rush area of Finnish Lapland. Analytical data suggest that an extensive solid-solution exists between...
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View PDF for article title, INCLUSIONS OF RUTHENIAN RUTILE AND TITANIAN RuO 2 IN <span class="search-highlight">ISOFERROPLATINUM</span> NUGGETS FROM FINNISH LAPLAND
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Journal Article

Isoferroplatinum mineral assemblage from the Burgastain Gol placer ( Western Mongolia ) Available to Purchase

T. Oyunchimeg, A.E. Izokh, A.V. Vishnevsky, V.M. Kalugin
Published: 01 October 2009
Russ. Geol. Geophys. (2009) 50 (10): 863–872.
DOI: https://doi.org/10.1016/j.rgg.2009.09.004
...T. Oyunchimeg; A.E. Izokh; A.V. Vishnevsky; V.M. Kalugin Abstract Platinum group element (PGE) mineral assemblage has been discovered in the gold placers along the Burgastain Gol and Iljgen Gol (Western Mongolia). It includes isoferroplatinum (Pt 3 Fe) grains with inclusions of cooperite (PtS...
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View PDF for article title, <span class="search-highlight">Isoferroplatinum</span> mineral assemblage from the Burgastain Gol placer ( Western Mongolia )
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Journal Article

Isoferroplatinum mineral assemblage in the northwestern Salair gold placer Available to Purchase

M.Yu. Podlipsky, G.V. Nesterenko, A.P. Krivenko
Published: 01 March 2007
Russ. Geol. Geophys. (2007) 48 (3): 291–298.
DOI: https://doi.org/10.1016/j.rgg.2005.11.001
...M.Yu. Podlipsky; G.V. Nesterenko; A.P. Krivenko Abstract Isoferroplatinum mineral assemblage has been first discovered in the Simonovsky Brook gold placer localized in the Egor’evskoe gold-bearing district (Salair Range). It includes isoferroplatinum (Pt 3 Fe) grains with inclusions...
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View PDF for article title, <span class="search-highlight">Isoferroplatinum</span> mineral assemblage in the northwestern Salair gold placer
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Features of chromite-isoferroplatinum aggrerages and silicate multiphase inclusions. (A) – EBSD misorientation map of a chromite-isoferroplatinum intergrowth (chromite shaded) revealing anhedral shape and deformations of isoferroplatinum (Veresovy Bor); (B) – inclusion of isoferroplatinum with attached minor phlogopite and clinopyroxene in chromite (Konder) (BSE-photo), (C) – secondary chromite-hosted inclusions with associated cooperite crystals (Konder) (BSE-photo); (D) – primary chromite-hosted multiphase silicate inclusion (Konder) (BSE-photo); (E) – primary isoferroplatinum-hosted multiphase silicate inclusion (Konder) (BSE-photo); (F) – isoferroplatinum-hosted multiphase silicate inclusion (Veresovy Bor) (BSE-photo).

Features of chromite-isoferroplatinum aggrerages and silicate multiphase in... Available to Purchase

Published: 28 December 2023
Fig. 2. Features of chromite-isoferroplatinum aggrerages and silicate multiphase inclusions. (A) – EBSD misorientation map of a chromite-isoferroplatinum intergrowth (chromite shaded) revealing anhedral shape and deformations of isoferroplatinum (Veresovy Bor); (B) – inclusion of isoferroplatinum
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Back-scattered electron images of PGE minerals from the placer deposit of the Levtyrinyvayam River. A. Osmium crystals with hollingworthite, which is rimmed by tulameenite in a grain of isoferroplatinum. B. Osarsite and hollingworthite occurring at the margin of osmium crystals in a grain of isoferroplatinum. C. Osarsite and erlichmanite associated with tetraferroplatinum occuring at the margin of a grain of isoferroplatinum. D. Osmium is intergrown with a erlichmanite in isoferroplatinum. Tetraferroplatinum rims the host isoferroplatinum. E. Platarsite with tetraferroplatinum replaces isoferroplatinum along the periphery. F. Isoferroplatinum grain with erlichmanite inclusion rimmed by tulameenite.

Back-scattered electron images of PGE minerals from the placer deposit of t... Available to Purchase

Published: 01 April 2004
F ig . 5. Back-scattered electron images of PGE minerals from the placer deposit of the Levtyrinyvayam River. A. Osmium crystals with hollingworthite, which is rimmed by tulameenite in a grain of isoferroplatinum. B. Osarsite and hollingworthite occurring at the margin of osmium crystals
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PGE mineral association from the Filippa massif placer (electron scanning photomicrographs). a — Inclusions of idiomorphic osmium crystals in isoferroplatinum grain; b — replacement of isoferroplatinum by cooperite-sperrylite aggregate; c — concentric zoning of reaction rims: inner (cooperite PtS) and outer (sperrylite PtAs2); d — isoferroplatinum relics in sperrylite grains; e — replacement of isoferroplatinum by cooperite; f — isometric inclusion of cuproiridsite Cu(Ir,Rh)2S4 in isoferroplatinum grain; g — isometric and irregular-shaped cuproiridsite segregations intergrown with cooperite in isoferroplatinum grain; h — irregular-shaped cuproiridsite segregations and rounded inclusion of kashinite Ir2S3 in isoferroplatinum grain; i — replacement of isoferroplatinum by heterogeneous aggregate composed mainly of sperrylite; j — cooperite (Pt,Pd)S that completely replaced isoferroplatinum with later formed reaction rims of Co-malanite (thin inner rim) and sperrylite (outer rim).

PGE mineral association from the Filippa massif placer (electron scanning p... Available to Purchase

Published: 01 September 2004
Fig. 5. PGE mineral association from the Filippa massif placer (electron scanning photomicrographs). a — Inclusions of idiomorphic osmium crystals in isoferroplatinum grain; b — replacement of isoferroplatinum by cooperite-sperrylite aggregate; c — concentric zoning of reaction rims: inner
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Platinum-group minerals extracted from the fine-grained dunite. A. Native Os (1) with isoferroplatinum 2), tetraferroplatinum (3) from allotriomorphic dunite. B. Native Os (1) and isoferroplatinum (2) with a margin of tetraferroplatinum (3). C. Idiomorphic grains of isoferroplatinum from allotriomorphic dunite. D. Idiomorphic grain of isoferroplatinum from cumulus dunite.

Platinum-group minerals extracted from the fine-grained dunite. A. Native O... Available to Purchase

Published: 01 December 2011
Fig. 7 Platinum-group minerals extracted from the fine-grained dunite. A. Native Os (1) with isoferroplatinum 2), tetraferroplatinum (3) from allotriomorphic dunite. B. Native Os (1) and isoferroplatinum (2) with a margin of tetraferroplatinum (3). C. Idiomorphic grains of isoferroplatinum from
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(a) Normalized Fe K-edge XANES spectra of sample grains, isoferroplatinum, magnetite, hematite, goethite, and ferrihydrite. Note that Pt-Fe “oxide” grains have similar spectra as isoferroplatinum, but that isoferroplatinum has higher peak at 7122 eV than at 7128 eV. (b) The curve “mix” is a hypothetical spectrum of a 10:90 mixture of isoferroplatinum and ferrihydrite and the contribution of the two components to the mixture are shown as thin lines. The spectrum of the mixture fits well with the observed spectrum of Grain 4. For the clarity of the diagram, another mixture is not shown, but the spectrum of Grain 3 fits well with an 11:89 mixture of isoferroplatinum and ferrihydrite.

( a ) Normalized Fe K -edge XANES spectra of sample grains, isoferroplatin... Available to Purchase

Published: 01 April 2010
F igure 8. ( a ) Normalized Fe K -edge XANES spectra of sample grains, isoferroplatinum, magnetite, hematite, goethite, and ferrihydrite. Note that Pt-Fe “oxide” grains have similar spectra as isoferroplatinum, but that isoferroplatinum has higher peak at 7122 eV than at 7128 eV. ( b
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Back-scattered electron images of PGM intergrowths from the Inagli placer. a) Platy grains of native osmium (Os) in isoferroplatinum (Pt3Fe); b) symplectitic intergrowths of native iridium (Ir) in isoferroplatinum; c) three-phase aggregate composed of isoferroplatinum, native iridium and native osmium; d) inclusions of native osmium, laurite (RuS2) and malanite (PtIrCuS4) in isoferroplatinum.

Back-scattered electron images of PGM intergrowths from the Inagli placer. ... Available to Purchase

Published: 01 December 2011
Fig. 6 Back-scattered electron images of PGM intergrowths from the Inagli placer. a) Platy grains of native osmium (Os) in isoferroplatinum (Pt 3 Fe); b) symplectitic intergrowths of native iridium (Ir) in isoferroplatinum; c) three-phase aggregate composed of isoferroplatinum, native iridium
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(a) Elongated and (b) isometric aggregates of Pt–Fe alloys; (c) osmium plates in isoferroplatinum; (d) large osmium grain; (e) bowieite and osmium inclusions in isoferroplatinum; and (f) laurite inclusions in isoferroplatinum. (BSE images) Bou = boweite; Chr = chromite; Lau = laurite.

( a ) Elongated and ( b ) isometric aggregates of Pt–Fe alloys; (c) osmium ... Available to Purchase

Published: 03 November 2020
Fig. 3. ( a ) Elongated and ( b ) isometric aggregates of Pt–Fe alloys; (c) osmium plates in isoferroplatinum; ( d ) large osmium grain; ( e ) bowieite and osmium inclusions in isoferroplatinum; and ( f ) laurite inclusions in isoferroplatinum. (BSE images) Bou = boweite; Chr = chromite; Lau
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PGM grains extracted from clinopyroxenite and gabbro. A. Isoferroplatinum from clinopyroxenite. B. Skeletal grain of isoferroplatinum (light-colored) with tetraferroplatinum (grey), from clinopyroxenite. C. Isoferroplatinum with a margin of tetraferroplatinum, from gabbro. D. Sperrylite from gabbro.

PGM grains extracted from clinopyroxenite and gabbro. A. Isoferroplatinum f... Available to Purchase

Published: 01 December 2011
Fig. 8 PGM grains extracted from clinopyroxenite and gabbro. A. Isoferroplatinum from clinopyroxenite. B. Skeletal grain of isoferroplatinum (light-colored) with tetraferroplatinum (grey), from clinopyroxenite. C. Isoferroplatinum with a margin of tetraferroplatinum, from gabbro. D. Sperrylite
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Reflected-light photomicrographs from lode deposits of the Gal’moenan complex. A. Anhedral grains of Pt–Fe alloy in chromite developing at the borders of olivine. B. Impregnation of chromite by anhedral grains of platinum. C. A grain of isoferroplatinum in intergranular space among grains of chromite. D. Pt–Fe alloy in fractures of chromite grains. E, F. Euhedral grains of isoferroplatinum in chromite (E) and olivine matrix (F). G. Laurite crystal is intergrown with isoferroplatinum. H. The replacement of isoferroplatinum by an irregular rim of tulameenite.

Reflected-light photomicrographs from lode deposits of the Gal’moenan compl... Available to Purchase

Published: 01 April 2004
F ig . 2. Reflected-light photomicrographs from lode deposits of the Gal’moenan complex. A. Anhedral grains of Pt–Fe alloy in chromite developing at the borders of olivine. B. Impregnation of chromite by anhedral grains of platinum. C. A grain of isoferroplatinum in intergranular space among
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BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO2 (red and lilac) as inclusion in laurite inclusion almost 0.1 mm long (green and yellow) in the isoferroplatinum nugget Vuijemi 28. Note that laurite is more ruthenium-rich near the oxide phase (yellower). C. BSE image of complex inclusion of osmium (light), ruthenian rutile (dark grey marked with analysis spots), and laurite (grey) in the isoferroplatinum nugget Vuijemi 32. D. Complex inclusion of ruthenium (orange red, Ru), laurite (yellow, L), ruthenian rutile (lilac, RR) and rutile (blue, Rt) in the isoferroplatinum nugget Vuijemi 32.

BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nug... Available to Purchase

Published: 01 April 2012
Fig. 5 BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO 2 (red and lilac
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BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO2 (red and lilac) as inclusion in laurite inclusion almost 0.1 mm long (green and yellow) in the isoferroplatinum nugget Vuijemi 28. Note that laurite is more ruthenium-rich near the oxide phase (yellower). C. BSE image of complex inclusion of osmium (light), ruthenian rutile (dark grey marked with analysis spots), and laurite (grey) in the isoferroplatinum nugget Vuijemi 32. D. Complex inclusion of ruthenium (orange red, Ru), laurite (yellow, L), ruthenian rutile (lilac, RR) and rutile (blue, Rt) in the isoferroplatinum nugget Vuijemi 32.

BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nug... Available to Purchase

Published: 01 April 2012
Fig. 5 BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO 2 (red and lilac
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BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO2 (red and lilac) as inclusion in laurite inclusion almost 0.1 mm long (green and yellow) in the isoferroplatinum nugget Vuijemi 28. Note that laurite is more ruthenium-rich near the oxide phase (yellower). C. BSE image of complex inclusion of osmium (light), ruthenian rutile (dark grey marked with analysis spots), and laurite (grey) in the isoferroplatinum nugget Vuijemi 32. D. Complex inclusion of ruthenium (orange red, Ru), laurite (yellow, L), ruthenian rutile (lilac, RR) and rutile (blue, Rt) in the isoferroplatinum nugget Vuijemi 32.

BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nug... Available to Purchase

Published: 01 April 2012
Fig. 5 BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO 2 (red and lilac
Image
BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO2 (red and lilac) as inclusion in laurite inclusion almost 0.1 mm long (green and yellow) in the isoferroplatinum nugget Vuijemi 28. Note that laurite is more ruthenium-rich near the oxide phase (yellower). C. BSE image of complex inclusion of osmium (light), ruthenian rutile (dark grey marked with analysis spots), and laurite (grey) in the isoferroplatinum nugget Vuijemi 32. D. Complex inclusion of ruthenium (orange red, Ru), laurite (yellow, L), ruthenian rutile (lilac, RR) and rutile (blue, Rt) in the isoferroplatinum nugget Vuijemi 32.

BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nug... Available to Purchase

Published: 01 April 2012
Fig. 5 BSE images and X-ray maps of Ti–Ru oxide inclusions in isoferroplatinum nuggets from Vuijemi. A. Ruthenian rutile (lilac) partly zonally surrounded by rutile (blue) in the nugget Vuijemi 6. Isoferroplatinum is shown in green, and silicates are very dark. B. Titanian RuO 2 (red and lilac
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Alteration of PGE alloys; all BSE images. Cited analyses are in Table 5. (A) One-stage alteration of tetraferroplatinum (analysis A-1); alteration increased Fe and Ni with a decrease in PGE except Ir (analysis A-2). (B) Two-stage alteration of isoferroplatinum (analysis B-1). Intermediate zone is tetraferroplatinum with an increase in Fe, Cu, and Ni and a decrease in Pt and Pd (analysis B-2); the rim has increased Ni and Fe with less PGE and nil Cu (analysis B-3). (C) Alteration of isoferroplatinum (analysis C-1) to tulameenite (analysis C-2) and tetraferroplatinum (analysis C-3) compositions. (D) Alteration of Pd-rich isoferroplatinum (analysis D-1) to isoferroplatinum with increased Pd (analysis D-2). (E) Broken and fractured euhedral tulameenite (pt. C, Fig. 5); rectangle enlarged in Figure 8F. (F) Enlargement showing fractured tulameenite (analysis F-1) filled with Cu-rich veins (analysis F-2). (G) Isoferroplatinum altered to tulameenite; rectangle enlarged in Figure 8H. (H) Isoferroplatinum (analysis H-1) bordered by a fractured rim of tulameenite (analysis H-2; pt. D, Fig. 5) filled with Cu-rich veins (analysis H-3). Two arrows show the initial stage of separation by the Cu-rich veins.

Alteration of PGE alloys; all BSE images. Cited analyses are in Table 5 . ... Available to Purchase

Published: 13 September 2021
Fig. 8. Alteration of PGE alloys; all BSE images. Cited analyses are in Table 5 . (A) One-stage alteration of tetraferroplatinum (analysis A-1); alteration increased Fe and Ni with a decrease in PGE except Ir (analysis A-2). (B) Two-stage alteration of isoferroplatinum (analysis B-1