Application of LA-ICP-MS trace-element analysis for precious metal deportment: a case study of the Kevitsa mine, Finland

Cabri, Louis J.; Kelvin, Michelle; Yang, Zhaoping; Jackson, Simon E.; Altun, Okan

doi:10.1127/ejm/2017/0029-2644

Cited by 16 publications

(4 citation statements)

References 10 publications

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“…Relatively few studies report data for the concentration of Pd and/or Pt in pyrite. In magmatic Ni-Cu-PGE deposits associated with mafic-ultramafic rocks, the earliest studies to recognize the PGE in pyrite used mass balance approaches, together with EMPA and PIXE to quantify these metals (e.g., Barkov et al, 1997;Oberthür et al, 1997;Cabri et al, 2002;Gervilla and Kojonen, 2002;Cabri et al, 2008;Cabri et al, 2010). Subsequent investigations using LA-ICP-MS to quantify PGE contents in the Great Dyke, Zimbabwe and at Aguablanca, Spain showed that Pt occurs in pyrite with elevated concentrations of Co, As and Se (Piña et al, 2011;Piña et al, 2016).…”

Section: Significance Of the Co-as-ni-se Association And Pge In Pyritementioning

confidence: 99%

Platinum-group elements (PGE) in the New Afton alkalic Cu-Au porphyry deposit, Canadian Cordillera, I: relationships between PGE, accessory metals and sulfur isotopes in pyrite

Boucher,

Robb,

Hanley

et al. 2023

Front. Earth Sci.

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The second part of this article can be found here: 10.3389/feart.2023.819109 (DOI). At the late Triassic New Afton alkalic porphyry Cu-Au deposit (British Columbia, Canada), pyrite is a widely distributed minor sulfide phase within hypogene ore where it predates Cu mineralization and hosts significant concentrations of Pd and Pt. Here we characterize pyrite major, minor and trace element composition by EPMA and LA-ICP-MS, and S isotopes (bulk pyrite and in situ SIMS in individual growth zones) to elucidate compositional variations at different stages of pyrite growth with respect to PGE deposition. At least two cycles of zoned Co-Ni-Pd-Pt-Se-As co-enrichment are recorded over two stages of pyrite growth at the New Afton deposit. Concentrations of Co (up to ∼5.5 wt%; highest observed in any reported ore-forming system) and Ni (up to 1 wt%) overlap with pyrite from mafic-ultramafic platinum-group element (PGE) deposits, iron oxide±apatite and iron oxide-copper-gold deposits (IOA-IOCG), and mantle peridotite-associated base metal exhalative deposits. In early hypogene (type I) pyrite, high Pt (up to ∼24 ppm) occurs in crystal cores that have high Co/Ni ratio (>∼7), high Co (>∼ 1 wt%) and are poor in Ni, Se, and As. With progressive growth, early hypogene pyrite rims and late hypogene (type II) cores record an initial Ni-Pd-As-Se (±Co) co-enrichment stage, followed by oscillations in composition (from “barren” to variably Co-Ni-Pd-Pt-As-Se-enriched). Pd in pyrite (up to ∼70 ppm) is inversely correlated to Co/Ni ratio, being enriched when Co/Ni < ∼7 and Ni > ∼1000 ppm. The highest levels of Pd enrichment occur in the most Ni- and Se-enriched growth zones. The transition from early, high Co/Ni (Pt-enriched) to later, low Co/Ni (Pd-enriched) growth zones is accompanied by a decrease in pyrite δ34SVCDT of up to ∼7‰ (4‰ range in single grains) with a total range in composition measured between −5.5‰ and +1.4‰. Subsequent to the shift to lower values, overgrowths of high Co/Ni pyrite formed with values of δ34SVCDT similar to the earliest Co-Pt-rich growth zones. Some combination of fluctuations in temperature and oxygen fugacity related to episodic cooling and hydrothermal recharge involving new pulses of metal-rich magmatic fluids is required to explain the observed metal enrichment patterns and variations in S isotope values. Co-Ni-rich pyrite may be a valuable exploration vector to PGE enrichment in porphyry deposits.

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Section: Significance Of the Co-as-ni-se Association And Pge In Pyritementioning

confidence: 99%

Platinum-group elements (PGE) in the New Afton alkalic Cu-Au porphyry deposit, Canadian Cordillera, I: relationships between PGE, accessory metals and sulfur isotopes in pyrite

Boucher,

Robb,

Hanley

et al. 2023

Front. Earth Sci.

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“…Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) is a method for analysing elements within a solid material in situ. It has been extensively applied in the geosciences since its development in 1985 and is commonly used in ore characterisation, geochronology, and provenance studies to analyse trace elements and isotopes [9,10]. LA-ICPMS possesses the capability to measure multiple elements simultaneously, either in a spot analysis or element compositional map, under low detection limits at the ppm to ppb level.…”

Section: Introductionmentioning

confidence: 99%

“…This unique in situ and rapid multi-element feature distinguishes LA-ICPMS from alternative methods such as secondary ion mass spectrometry (SIMS) and micro proton-induced X-ray emission (PIXE), as they involve specific operating conditions for each element, thereby reducing the efficiency and impeding the real-time observation of the corresponding elements [11][12][13]. Over the past decades, LA-ICPMS analysis has been preferred for trace element identification in the exploration and mineral processing industry due to its reliability, sensitivity, flexibility, efficient processing speed, and cost-effectiveness compared to alternative analytical method approaches [9,14].…”

Section: Introductionmentioning

confidence: 99%

Trace Element Analysis of Pyrite and Arsenopyrite Using the LA-ICPMS Technique in Pulai, Central Belt of Peninsular Malaysia

Ai Zamruddin,

Zainal Abidin,

Endut

et al. 2023

Minerals

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The Pulai gold deposit is one of the most promising gold prospects in the Central Belt of Peninsular Malaysia. It is found within the Permian-Triassic Gua Musang sequence of metasediments and metavolcanics and in a structurally controlled NE-SW major fault. Various ore minerals, including pyrite, arsenopyrite, chalcopyrite, sphalerite, pyrrhotite, and galena are typically associated with this deposit. Four types of pyrite (Pyrite 1, Pyrite 2, Pyrite 3, and Pyrite 4) and two types of arsenopyrite (Arsenopyrite 1 and Arsenopyrite 2) were characterised based on their morphological and textural differences. In this region, gold occurs as refractory gold in the nanoparticle form and in the state of Au+ within the structure of sulphides of variable concentrations. Through the detailed laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) trace element mapping analysis of pyrite and arsenopyrite, the main Au-bearing sulphides were found within vein-hosted Pyrite 4 and Arsenopyrite 2 during late phase mineralisation, while Pyrite 3 had the lowest Au concentration. Two phases of Au enrichment were recorded in Pyrite 4, mainly in the core (2 to 11.7 ppm; average 1.4 ppm) and margin of the grain (0.3 to 8.8 ppm; average 1.2 ppm), whereas the highest Au content was detected in the core of Arsenopyrite 2 (0.3 to 137.1 ppm; mean 31.9 ppm). The enrichment of Au is associated with As, forming a zoning elemental pattern distribution. Other trace elements, including Co, Ni, Sb, Pb, Bi, Cu, and Zn, show systematic variation in their composition between the various types of pyrite and arsenopyrite. For early-phase sulphides, the Au enrichment localised at the margin of Pyrite 2 and Arsenopyrite 1, together with Co–Ni, Pb–Bi–Sb, and Ag in the same oriented pattern, suggesting the remobilisation and redistribution of Au in sulfides. Meanwhile, the late crystallisation phase of vein-hosted sulphides formed a rich Au–As ore zoning pattern in the core of Arsenopyrite 2 and Pyrite 4. The second phase of Au enrichment continued at the margin of Pyrite 4 through the remobilisation and precipitation of Au together with Ni, Co, Sb, Pb, Bi, Ag, and Cu. Subsequent deformation then reactivated the late fluid system with the enrichment of Sr, Ba, Rb, Ag, and Zn along the fractures and outermost rim of Pyrite 4 and Rb–Sr–Ba–Pb–Bi along the rim of Arsenopyrite 2. The Pulai gold prospect is interpreted as an orogenic-style gold mineralisation where arsenic can be used as an indicator for proximity to ore mineralisation in exploration.

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“…In addition to Co, Ni, and As, many of these minerals show also the As-Sb substitution, for example in the gersdorffite-ullmanite (NiAsS-NiSbS) series (Števko a Sejkora 2020). Occasionally, minerals like gersdorffite may contain economically interesting concentrations of gold or platinum-group elements (e.g., Pašava et al 2013, Cabri et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Calorimetric study of skutterudite (CoAs2.92) and heazlewoodite (Ni3S2)

Majzlan

Kiefer

Lilova

et al. 2022

American Mineralogist

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Nickel and cobalt arsenides, sulfarsenides, and sulfides occur in many hydrothermal ore deposits but the thermodynamic properties of these phases are not well known, in some cases not known at all. In this work, we determined a full set of thermodynamic properties for heazlewoodite and skutterudite. Both phases were synthesized in evacuated silica tubes at elevated temperatures and electron microprobe analyses gave their composition as Ni3S2 and CoAs2.92, respectively. Enthalpies of formation were measured by high-temperature oxidemelt solution calorimetry. The reference phases were pure elements, thus eliminating any systematic errors related to such phases. The enthalpies of formation at T = 298.15 K and P = 10 5 Pa are -216.0±8.4(2) and -88.2±6.1 kJ•mol -1 for Ni3S2 and CoAs2.92, respectively. Entropies were calculated from low-temperature heat capacity (Cp) data from relaxation (PPMS) calorimetry and are 133.8±1.6 and 106.4±1.3 J•mol -1 •K -1 , respectively. The calculated Gibbs free energies of formation are -210.0±8.4 and -79.9±6.2 kJ•mol -1 for Ni3S2 and CoAs2.92, respectively. The PPMS Cp data, together with a set of differential scanning calorimetry This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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Application of LA-ICP-MS trace-element analysis for precious metal deportment: a case study of the Kevitsa mine, Finland

Cited by 16 publications

References 10 publications

Platinum-group elements (PGE) in the New Afton alkalic Cu-Au porphyry deposit, Canadian Cordillera, I: relationships between PGE, accessory metals and sulfur isotopes in pyrite

Platinum-group elements (PGE) in the New Afton alkalic Cu-Au porphyry deposit, Canadian Cordillera, I: relationships between PGE, accessory metals and sulfur isotopes in pyrite

Trace Element Analysis of Pyrite and Arsenopyrite Using the LA-ICPMS Technique in Pulai, Central Belt of Peninsular Malaysia

Calorimetric study of skutterudite (CoAs2.92) and heazlewoodite (Ni3S2)

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