A native nickel-heazlewoodite-ferroan trevorite assemblage from Mount Clifford, Western Australia

Hudson, D. R.; Travis, G. A.

doi:10.2113/gsecongeo.76.6.1686

Cited by 19 publications

(9 citation statements)

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“…4f). Millerite in these veinlets is fibrous in habit and appears to follow structural directions in the replaced godlevskite (Hudson and Travis, 1981). The completely steatized rocks contain rounded and irregular grains of millerite (Fig.…”

Section: Replacement Textures Of Ni-rich Phasesmentioning

confidence: 97%

“…native nickel has been reported at various localities in association with heazlewoodite (Augé et al, 1999) and Ni-rich magnetite (Hudson and Travis, 1981). Some of these Ni-rich awaruite (native Ni) grains might have crystallized from Ni-rich hydrothermal fluids if fS 2 approaches zero and stabilize at sufficiently high fO 2 (Dekov, 2006), or formed by desulfurization (sulfurloss) of magmatic pentlandite under a strongly reducing conditions (Ramdohr, 1980;Hudson and Travis 1981;Marques de Sá et al, 2018).…”

Section: Partial Dehydration Of Serpentinites and Ni-rich Awaruite Fo...mentioning

confidence: 99%

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Hydrothermal alteration of Ni-rich sulfides in peridotites of Abu Dahr, Eastern Desert, Egypt: Relationships among minerals in the Fe-Ni-Co-O-S system,fO2 andfS2

Abdel-Halim

2023

American Mineralogist

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The Neoproterozoic peridotites of Abu Dahr, Eastern Desert of Egypt, consist mainly of highly depleted harzburgites that have experienced multiple stages of serpentinization (lizarditization and antigoritization) and carbonation/listvenitization in a forearc environment.The Abu Dahr forearc harzburgites are more oxidized than oceanic mantle, with the oxygen fugacity (fO 2 ) values ranging from FMQ +0.41 to FMQ +1.20 (average = +0.60 FMQ), and were equilibrated at temperatures of 910-1217°C and pressures of 4.1-7.8 kbar. This study has documented for the first time the presence of a variety of Ni-rich Ni-Fe (-Co) sulfide and metal phases along with Fe-oxides/oxyhydroxides in serpentinized-carbonated peridotites of the Abu Dahr forearc. Here I concentrate on the relationship between redox state and Fe-Ni-Co-O-S minerals with emphasis on the role of hydrothermal processes in upgrading magmatic sulfide tenors, desulfurization (sulfur-loss) of magmatic pentlandite and hydrothermal upgrading of the sulfide phases in Abu Dahr forearc environment. The minerals involved are high-Ni pentlandite (Fe 4 Ni 5 S 8 ), cobaltian pentlandite (Fe 3.47 Ni 4.78 Co 0.75 S 8 ), heazlewoodite (Fe 0.07 Ni 2.93 S 2 ), godlevskite (Fe 0.26 Ni 8.73 Co 0.01 S 8 ), millerite (Fe 0.01 Ni 0.98 Cu 0.01 S), awaruite (Ni 75 Fe 21 ) and native Ni (Ni 93 Fe 5 ), and nickeliferous magnetite and goethite. Chalcopyrite is a rare mineral; other Cuphases, Fe-sulfides and Ni-arsenides/phosphides are not present. Texturally, Ni-sulfide and alloy

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Section: Replacement Textures Of Ni-rich Phasesmentioning

confidence: 97%

Section: Partial Dehydration Of Serpentinites and Ni-rich Awaruite Fo...mentioning

confidence: 99%

Hydrothermal alteration of Ni-rich sulfides in peridotites of Abu Dahr, Eastern Desert, Egypt: Relationships among minerals in the Fe-Ni-Co-O-S system,fO2 andfS2

Abdel-Halim

2023

American Mineralogist

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“…Trevorite is a nickel-iron oxide spinel that can occur in ultramafic rocks and has been identified in this area of the Klamath Mountains (Bird and Weathers, 1975;Hudson and Travis, 1981). Pargasite is in the amphibole group, and thus is an inosilicate mineral.…”

Section: Physicochemical and Mineralogical Analysismentioning

confidence: 99%

Nickel speciation in several serpentine (ultramafic) topsoils via bulk synchrotron-based techniques

2017

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Serpentine soils have elevated concentrations of trace metals including nickel, cobalt, and chromium compared to non-serpentine soils. Identifying the nickel bearing minerals allows for prediction of potential mobility of nickel. Synchrotron-based techniques can identify the solidphase chemical forms of nickel with minimal sample treatment. Element concentrations are known to vary among soil particle sizes in serpentine soils. Sonication is a useful method to physically disperse sand, silt and clay particles in soils. Synchrotron-based techniques and sonication were employed to identify nickel species in discrete particle size fractions in several serpentine (ultramafic) topsoils to better understand solid-phase nickel geochemistry. Nickel commonly resided in primary serpentine parent material such as layered-phyllosilicate and chain-inosilicate minerals and was associated with iron oxides. In the clay fractions, nickel was associated with iron oxides and primary serpentine minerals, such as lizardite. Linear

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“…Kambalda, Western Australia) in some respects, the presence of the trevorite ore body means that there are interesting differences. The Marriotts Ni-sulfide occurrence at Mount Clifford (Hudson and Travis, 1981) has previously been shown to contain trevorite as a result of alteration of the primary sulfide assemblage, but only in minor quantities as a disseminated mineral phase. The comparatively massive trevorite ore body at Bon Accord may have formed via oxidation and desulfurization of Ni-sulfide ore, but it is difficult to speculate on the nature and timing of the purported oxidation event.…”

Section: Local and Regional Lithological Constraints On The Origin Ofmentioning

confidence: 99%

“…heazlewoodite) and in association with native metals and alloys (Ni-Fe alloys) in disseminated and massive sulfide deposits (e.g. Eckstrand, 1975;Hudson and Travis, 1981). Trevorite has also been reported in impact melt veins associated with the~1 44 Ma Morokweng crater (South Africa), in a paragenesis that also contains unusual Ni-rich silicates (liebenbergite and willemseite) and sulfides (millerite and bornite).…”

Section: Introductionmentioning

confidence: 99%

Trevorite: Ni-rich spinel formed by metasomatism and desulfurization processes at Bon Accord, South Africa?

et al. 2014

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The 3.5 Ga Bon Accord Ni deposit occurs within the lowest serpentinized mafic ultramafic lavas of the Barberton Greenstone Belt (South Africa). Though now completely mined out, it comprised a suite of rare Ni-rich minerals that led to its interpretation as either an extraterrestrial body or as an oxidized fragment of Fe-Ni alloy originating from the terrestrial core. In this study, we draw on detailed petrographic observation and mineral chemical data, as well as previous work, to re-evaluate these ideas. The balance of evidence, from thin section (<1 mm) to regional (∼10s of km) scales, appears to support an alternative origin for Bon Accord, possibly as an oxidized Ni-sulfide deposit formed in association with ocean floor komatiite eruptions

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A native nickel-heazlewoodite-ferroan trevorite assemblage from Mount Clifford, Western Australia

Cited by 19 publications

References 0 publications

Hydrothermal alteration of Ni-rich sulfides in peridotites of Abu Dahr, Eastern Desert, Egypt: Relationships among minerals in the Fe-Ni-Co-O-S system,fO2 andfS2

Hydrothermal alteration of Ni-rich sulfides in peridotites of Abu Dahr, Eastern Desert, Egypt: Relationships among minerals in the Fe-Ni-Co-O-S system,fO2 andfS2

Nickel speciation in several serpentine (ultramafic) topsoils via bulk synchrotron-based techniques

Trevorite: Ni-rich spinel formed by metasomatism and desulfurization processes at Bon Accord, South Africa?

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