QUANTITATIVE MASS BALANCE OF PLATINUM GROUP ELEMENTS IN THE KELLY LAKE Ni-Cu-PGE DEPOSIT, COPPER CLIFF OFFSET, SUDBURY

Huminicki, M. A. E.; Sylvester, Paul J.; Cabri, Louis J.; Lesher, C. Michael; Tubrett, Michael

doi:10.2113/gsecongeo.100.8.1631

Cited by 37 publications

(8 citation statements)

References 6 publications

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“…Note that this calculation assumes that the sulfide mineral assemblage contains a negligible concentration of platinum-group elements relative to the PGM, which are assumed to contain the bulk of the PGE (Cabri & Laflamme 1984, Cabri 1988). This assumption has been verified by Huminicki et al (2005), who found that ~98% of the platinum and ~90% of the palladium are hosted in the PGM of the Kelly Lake deposit in the Copper Cliff offset. Recent results from laser ablation -inductively coupled plasma -mass spectrometry (LA-ICP-MS) of base-metal sulfides in blended Sudbury feed obtained by NCT Mineral Consulting Inc. for Vale are consistent with the Huminicki et al (2005) results.…”

Section: Resultsmentioning

confidence: 72%

Predicting Process Outcomes for Sudbury Platinum-Group Minerals Using Grade-Recovery Modeling From Mineral Liberation Analyzer (Mla) Data

Ford¹,

Wercholaz²,

Lee³

2011

The Canadian Mineralogist

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Platinum-group minerals (PGM) typically occur in such low concentrations that quantitative mineralogical evaluation is difficult or impossible. The FEI Mineral Liberation Analyzer (MLA) system used by Vale Base Metals Technology Development has been successfully employed to produce large PGM datasets that are statistically robust. The MLA Sparse Phase Liberation mapping routine produces false-color images that accurately document mineral textures, including intergrowths between various platinum-group minerals and between PGM and other tellurides and sulfides. The MLA PGM search results can be used in conjunction with mineral compositions to calculate the distribution of platinum-group elements among minerals; the MLA PGM images can be used to produce model grade-recovery curves that can predict platinum and palladium recovery in mineral concentrator circuits.

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Section: Resultsmentioning

confidence: 72%

Predicting Process Outcomes for Sudbury Platinum-Group Minerals Using Grade-Recovery Modeling From Mineral Liberation Analyzer (Mla) Data

Ford¹,

Wercholaz²,

Lee³

2011

The Canadian Mineralogist

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“…By recalculating the bulk rock PGE and Au abundances of xenolith LR80 (from the analyses of a 5 g aliquot of powder from the unaltered core of the xenolith; Hughes et al, 2014) to 100% sulphide (assuming a mean sulphide abundance of 0.07% for LR80, Table 4; using the method outlined by Huminicki et al, 2005) and comparing this to the mean PGE and Au normalised patterns for Group A and B BMS, we observe that the bulk rock PGE abundances are controlled by BMS (Fig. 12).…”

Section: Tellurium and Gold In Loch Roag Bmsmentioning

confidence: 99%

Paradoxical co-existing base metal sulphides in the mantle: The multi-event record preserved in Loch Roag peridotite xenoliths, North Atlantic Craton

Hughes

McDonald

Loocke

et al. 2017

Lithos

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT AbstractThe role of the subcontinental lithospheric mantle as a source of precious metals for mafic magmas is contentious and, given the chalcophile (and siderophile) character of metals such as the platinumgroup elements (PGE), Se, Te, Re, Cu and Au, the mobility of these metals is intimately linked with that of sulphur. Hence the nature of the host phase(s), and their age and stability in the subcontinental lithospheric mantle may be of critical importance. We investigate the sulphide mineralogy and sulphide in situ trace element compositions in base metal sulphides (BMS) in a suite of spinel lherzolite mantle xenoliths from northwest Scotland (Loch Roag, Isle of Lewis). This area is situated on the margin of the North Atlantic Craton which has been overprinted by a Palaeoproterozoic orogenic belt, and occurs in a region which has undergone magmatic events from the Palaeoproterozoic to the Eocene.We identify two populations of co-existing BMS within a single spinel lherzolite xenolith (LR80) and which can also be recognised in the peridotite xenolith suite as a whole. Both populations consist of a mixture of Fe-Ni-Cu sulphide minerals, and we distinguished between these according to BMS texture, petrographic setting (i.e., location within the xenolith in terms of 'interstitial' or within feldspar-spinel symplectites, as demonstrated by X-ray Computed Microtomography) and in situ trace element composition. Group A BMS are coarse, metasomatic, have low concentrations of total PGE (< 40 ppm) and high (Re/Os) N (ranging 1 to 400). Group B BMS strictly occur within symplectites of spinel and feldspar, are finer-grained rounded droplets, with micron-scale PtS (cooperite), high overall total PGE concentrations (15-800 ppm) and low (Re/Os) N ranging 0.04 to 2. Group B BMS sometimes coexist with apatite, and both the Group B BMS and apatite can preserve rounded micron-scale Ca-carbonate inclusions indicative of sulphide-carbonate-phosphate immiscibility. This carbonate-phosphate metasomatic association appears to be important in forming PGE-rich sulphide liquids, although the precise mechanism for this remains obscure. As a consequence of their position within the symplectites, Group B BMS are particularly vulnerable to being incorporated in ascending A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTmantle-derived magmas (either by melting or physical entrainment). Based on the cross-cutting relationships of the symplectites, it is possible to in...

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“…Also shown in Fig. 6 are the compositions of mss that was equilibrated with sulfide melt at geologically reasonable fO 2 and fS 2 , iss from a single experiment by Fleet and Pan (1994), and the compositions of chalcopyrite, pentlandite and pyrrhotite from magmatic sulfide ores of the Kelly Lake deposit at Sudbury that have reached chemical equilibrium at temperatures well below magmatic temperatures (Huminicki et al, 2005). The point for cubanite is taken from our recent unpublished data.…”

Section: Comparison To Natural Sulfide Compositionsmentioning

confidence: 99%

Crystallization of magmatic sulfides: An empirical model and application to Sudbury ores

Mungall

2007

Geochimica et Cosmochimica Acta

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QUANTITATIVE MASS BALANCE OF PLATINUM GROUP ELEMENTS IN THE KELLY LAKE Ni-Cu-PGE DEPOSIT, COPPER CLIFF OFFSET, SUDBURY

Cited by 37 publications

References 6 publications

Predicting Process Outcomes for Sudbury Platinum-Group Minerals Using Grade-Recovery Modeling From Mineral Liberation Analyzer (Mla) Data

Predicting Process Outcomes for Sudbury Platinum-Group Minerals Using Grade-Recovery Modeling From Mineral Liberation Analyzer (Mla) Data

Paradoxical co-existing base metal sulphides in the mantle: The multi-event record preserved in Loch Roag peridotite xenoliths, North Atlantic Craton

Crystallization of magmatic sulfides: An empirical model and application to Sudbury ores

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