Chalcopyrite formation through the metathesis of pyrrhotite with aqueous copper

Elliot, A.; Watling, H.R.

doi:10.1016/j.gca.2011.01.033

Cited by 10 publications

(4 citation statements)

References 48 publications

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“…Additionally, we attempted to answer the question of how these slag materials behave under various pH conditions. Therefore, leaching tests intended to examine leachability of Cu, Zn and Pb as a function of pH (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13) were performed in order to establish the potential stability of slags at a given range of conditions.…”

Section: Introductionmentioning

confidence: 99%

Characterization and pH-dependent leaching behaviour of historical and modern copper slags

Potysz

Kierczak

Fuchs

et al. 2016

Journal of Geochemical Exploration

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Section: Introductionmentioning

confidence: 99%

Characterization and pH-dependent leaching behaviour of historical and modern copper slags

Potysz

Kierczak

Fuchs

et al. 2016

Journal of Geochemical Exploration

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“…Chalcopyrite forms zoned and gradational rims with pyrrhotite, indicating growth zones, or repeated fluid cycles. This possibly shows that chalcopyrite is formed due to replacement of the pyrrhotite in the presence of aqueous copper (Elliot and Watling, 2011). The morphology of the chalcopyrite in this mine suggests the presence of two generations or depositional episodes (massive and euhedral).…”

Section: Pyrrhotite and Chalcopyritementioning

confidence: 79%

Insights on Mineralogy and Chemistry of Fairview Gold Mine, Barberton Greenstone Belt, South Africa

Altigani

2021

Indonesian J. Geosci.

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Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and electron microprobe analysis (EMPA) techniques were used to determine the mineralogy and chemistry of dominant sulphide and associated gold deposits at the Fairview Gold Mine of the Barberton Greenstone Belt (BGB). The rocks and ore mineral associations at the Fairview Mine indicate mesothermal (orogenic) conditions for the gold deposit. The whole rock chemistry of the Fairview Mine reflects calc-alkaline affinities, and felsic provenance is revealed by high SiO 2 , K 2 O, Al 2 O 3 , and TiO 2 , and low Fe 2 O 3 , MgO, Ni, and Cr contents. The mineral assemblages of the Fairview Mine rocks and ores indicate three phases of metamorphisms; regional prograde, thermal, and retrograde metamorphism, which caused zonation and heterogeneity of the ore minerals. The principal ore minerals in this deposit are pyrite, arsenopyrite, pyrrhotite, chalcopyrite, and rare sphalerite, as well as minor gold. The obtained results revealed that sulphides of the Fairview Mine are divided into two types (generations) varying in their morphology, association, and elemental composition. The old type 1 is porous, anhedral, heterogeneous, contains inclusions and rich in As, Ni, Co, and Au compared to type 2. Trace-element distribution and occurrence mode of gold at Fairview mine reflect two phases of gold mineralization. The first stage is associated with sulphides (mainly pyrite and arsenopyrite), whilst the second phase is free-lode hosted by silicates (mainly quartz).

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“…By contrast, LL6 particles among the Itokawa sample set equilibrated at temperatures of~800°C with slow cooling to only~600°C 1,24 . The mottled troilite-cubanite-chalcopyrite grain with low amounts of copper present between the cubanite and 4C-pyrrhotite suggests the interaction of the pyrrhotite with a Cu-bearing fluid during lowtemperature aqueous alteration to form the cubanite 25,26 . Structural and petrologic evidence from CI chondrites show the cubanite in those meteorites formed at a later stage than the pyrrhotite as well 10,14 .…”

Section: Discussionmentioning

confidence: 99%

Exogenous copper sulfide in returned asteroid Itokawa regolith grains are likely relicts of prior impacting body

Burgess

Stroud

2021

Commun Earth Environ

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Samples from asteroid 25143 Itokawa returned by the Hayabusa mission have been identified as LL4-6 ordinary chondrite materials and have shown it to be a rubble pile that aggregated after break-up of a parent body. Here we investigate particle RB-CV-0038 from the Itokawa regolith using scanning and transmission electron microscopy and energy dispersive spectroscopy. We identify a cubanite-chalcopyrite-troilite-pyrrhotite assemblage, the phases and structure of which are indicative of low-temperature, aqueous alteration. Cubanite is stable only at temperatures below around 250 °C and has thus far only been identified in CI carbonaceous chondrites and the comet 81P/Wild2 sample suite. Chalcopyrite is also very rare in the meteorite record and is found mostly in R chondrites and some CK chondrites. Because the Itokawa parent body experienced significant thermal alteration with little evidence of low-temperature equilibration or aqueous alteration, we propose that the assemblage we identify is most likely exogenous and represents a component of an impacting body.

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Chalcopyrite formation through the metathesis of pyrrhotite with aqueous copper

Cited by 10 publications

References 48 publications

Characterization and pH-dependent leaching behaviour of historical and modern copper slags

Characterization and pH-dependent leaching behaviour of historical and modern copper slags

Insights on Mineralogy and Chemistry of Fairview Gold Mine, Barberton Greenstone Belt, South Africa

Exogenous copper sulfide in returned asteroid Itokawa regolith grains are likely relicts of prior impacting body

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