Platinum-group element and gold contents of arsenide and sulfarsenide minerals associated with Ni and Au deposits in Archean greenstone belts

Margaux Le Vaillant, Stephen J. Barnes, Marco L. Fiorentini, Sarah-Jane Barnes, Adam Bath, John Miller

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Post-magmatic alteration of certain magmatic Ni sulfide ores in Western Australia, the Miitel deposit and the Sarah's Find prospect, produced Ni-As-PGE haloes around massive sulfides. A study of the composition of arsenide grains from these hydrothermal haloes, along with arsenides from various magmatic and hydrothermal mineralized environments in other localities, was conducted in order to compare their composition, and assess their potential use as indicator minerals for exploration vectoring, as well as to gain knowledge on their crystallization history. Concentrations in trace elements such as platinum-group elements (PGEs), Au and other metals was obtained by laser ablation inductively coupled plasma mass spectroscopy analyses. Results show that variations in PGEs and Au compositions can be related to the magmatic vs. hydrothermal origin of the grains; and to their provenance from deposits enriched in either Ni. Au or both. Magmatic NiCoFe sulfarsenides have strongly correlated, high IPGE (Os, Ir, Ru, Rh) contents up to 100 ppm Ir, compared with maximum values in hydrothermal sulfarsenides of similar to 1 ppm. Gold in hydrothermal sulfarsenides from Au-mineralized ultramafic rocks extends up to 500 ppm, with typical values of 3-30 ppm; similar values are also found in nickeline (also called niccolite). These results suggest that nickel arsenides could potentially be used as indicator minerals for nickel and gold exploration. Trace-element contents of arsenide grains in shear zones could be used to deduce the presence of Ni or Au mineralization upstream in the fluid pathway.

Original languageEnglish
Pages (from-to)625-647
Number of pages23
JournalMineralogical Magazine
Volume82
Issue number3
DOIs
Publication statusPublished - Jun 2018

Cite this

@article{06d58b691ae04e64a3815735415782e0,
title = "Platinum-group element and gold contents of arsenide and sulfarsenide minerals associated with Ni and Au deposits in Archean greenstone belts",
abstract = "Post-magmatic alteration of certain magmatic Ni sulfide ores in Western Australia, the Miitel deposit and the Sarah's Find prospect, produced Ni-As-PGE haloes around massive sulfides. A study of the composition of arsenide grains from these hydrothermal haloes, along with arsenides from various magmatic and hydrothermal mineralized environments in other localities, was conducted in order to compare their composition, and assess their potential use as indicator minerals for exploration vectoring, as well as to gain knowledge on their crystallization history. Concentrations in trace elements such as platinum-group elements (PGEs), Au and other metals was obtained by laser ablation inductively coupled plasma mass spectroscopy analyses. Results show that variations in PGEs and Au compositions can be related to the magmatic vs. hydrothermal origin of the grains; and to their provenance from deposits enriched in either Ni. Au or both. Magmatic NiCoFe sulfarsenides have strongly correlated, high IPGE (Os, Ir, Ru, Rh) contents up to 100 ppm Ir, compared with maximum values in hydrothermal sulfarsenides of similar to 1 ppm. Gold in hydrothermal sulfarsenides from Au-mineralized ultramafic rocks extends up to 500 ppm, with typical values of 3-30 ppm; similar values are also found in nickeline (also called niccolite). These results suggest that nickel arsenides could potentially be used as indicator minerals for nickel and gold exploration. Trace-element contents of arsenide grains in shear zones could be used to deduce the presence of Ni or Au mineralization upstream in the fluid pathway.",
keywords = "platinum-group element, gold, nickel arsenide, sulfarsenide, Archean greenstone belts, NICKEL-SULFIDE DEPOSIT, WESTERN-AUSTRALIA, YILGARN CRATON, NI-CU-(PGE) DEPOSIT, WIDGIEMOOLTHA DOME, SARAHS FIND, CU DEPOSIT, BOU-AZZER, MINERALIZATION, PGE",
author = "{Le Vaillant}, Margaux and Barnes, {Stephen J.} and Fiorentini, {Marco L.} and Sarah-Jane Barnes and Adam Bath and John Miller",
year = "2018",
month = "6",
doi = "10.1180/minmag.2017.081.100",
language = "English",
volume = "82",
pages = "625--647",
journal = "Mineralogical Magazine",
issn = "0026-461X",
publisher = "MINERALOGICAL SOC AMER",
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Platinum-group element and gold contents of arsenide and sulfarsenide minerals associated with Ni and Au deposits in Archean greenstone belts. / Le Vaillant, Margaux; Barnes, Stephen J.; Fiorentini, Marco L.; Barnes, Sarah-Jane; Bath, Adam; Miller, John.

In: Mineralogical Magazine, Vol. 82, No. 3, 06.2018, p. 625-647.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Platinum-group element and gold contents of arsenide and sulfarsenide minerals associated with Ni and Au deposits in Archean greenstone belts

AU - Le Vaillant, Margaux

AU - Barnes, Stephen J.

AU - Fiorentini, Marco L.

AU - Barnes, Sarah-Jane

AU - Bath, Adam

AU - Miller, John

PY - 2018/6

Y1 - 2018/6

N2 - Post-magmatic alteration of certain magmatic Ni sulfide ores in Western Australia, the Miitel deposit and the Sarah's Find prospect, produced Ni-As-PGE haloes around massive sulfides. A study of the composition of arsenide grains from these hydrothermal haloes, along with arsenides from various magmatic and hydrothermal mineralized environments in other localities, was conducted in order to compare their composition, and assess their potential use as indicator minerals for exploration vectoring, as well as to gain knowledge on their crystallization history. Concentrations in trace elements such as platinum-group elements (PGEs), Au and other metals was obtained by laser ablation inductively coupled plasma mass spectroscopy analyses. Results show that variations in PGEs and Au compositions can be related to the magmatic vs. hydrothermal origin of the grains; and to their provenance from deposits enriched in either Ni. Au or both. Magmatic NiCoFe sulfarsenides have strongly correlated, high IPGE (Os, Ir, Ru, Rh) contents up to 100 ppm Ir, compared with maximum values in hydrothermal sulfarsenides of similar to 1 ppm. Gold in hydrothermal sulfarsenides from Au-mineralized ultramafic rocks extends up to 500 ppm, with typical values of 3-30 ppm; similar values are also found in nickeline (also called niccolite). These results suggest that nickel arsenides could potentially be used as indicator minerals for nickel and gold exploration. Trace-element contents of arsenide grains in shear zones could be used to deduce the presence of Ni or Au mineralization upstream in the fluid pathway.

AB - Post-magmatic alteration of certain magmatic Ni sulfide ores in Western Australia, the Miitel deposit and the Sarah's Find prospect, produced Ni-As-PGE haloes around massive sulfides. A study of the composition of arsenide grains from these hydrothermal haloes, along with arsenides from various magmatic and hydrothermal mineralized environments in other localities, was conducted in order to compare their composition, and assess their potential use as indicator minerals for exploration vectoring, as well as to gain knowledge on their crystallization history. Concentrations in trace elements such as platinum-group elements (PGEs), Au and other metals was obtained by laser ablation inductively coupled plasma mass spectroscopy analyses. Results show that variations in PGEs and Au compositions can be related to the magmatic vs. hydrothermal origin of the grains; and to their provenance from deposits enriched in either Ni. Au or both. Magmatic NiCoFe sulfarsenides have strongly correlated, high IPGE (Os, Ir, Ru, Rh) contents up to 100 ppm Ir, compared with maximum values in hydrothermal sulfarsenides of similar to 1 ppm. Gold in hydrothermal sulfarsenides from Au-mineralized ultramafic rocks extends up to 500 ppm, with typical values of 3-30 ppm; similar values are also found in nickeline (also called niccolite). These results suggest that nickel arsenides could potentially be used as indicator minerals for nickel and gold exploration. Trace-element contents of arsenide grains in shear zones could be used to deduce the presence of Ni or Au mineralization upstream in the fluid pathway.

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KW - gold

KW - nickel arsenide

KW - sulfarsenide

KW - Archean greenstone belts

KW - NICKEL-SULFIDE DEPOSIT

KW - WESTERN-AUSTRALIA

KW - YILGARN CRATON

KW - NI-CU-(PGE) DEPOSIT

KW - WIDGIEMOOLTHA DOME

KW - SARAHS FIND

KW - CU DEPOSIT

KW - BOU-AZZER

KW - MINERALIZATION

KW - PGE

U2 - 10.1180/minmag.2017.081.100

DO - 10.1180/minmag.2017.081.100

M3 - Article

VL - 82

SP - 625

EP - 647

JO - Mineralogical Magazine

JF - Mineralogical Magazine

SN - 0026-461X

IS - 3

ER -