2019
DOI: 10.1038/s41598-019-50519-z
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The Alteration Mechanism of Copper-bearing Biotite and Leachable Property of Copper-bearing Minerals in Mulyashy Copper Mine, Zambia

Abstract: The XRF, XRD, polarizing microscopy and SEM-EDS were used to study the alteration mechanism of copper-bearing biotite and the leachable property of copper-bearing minerals in Mulyashy Copper Mine, Zambia. It was found that biotite can be divided into copper-bearing biotite and copper-free biotite. Some copper-bearing biotite existed in the form of monomer, and others aggregated with copper-bearing chlorite, malachite or copper-bearing limonite. The main reason for the occurrence of biotite aggregations was tha… Show more

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Cited by 7 publications
(3 citation statements)
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References 30 publications
(27 reference statements)
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“…Copper is a chalcophile element and it preferably resides in sulphide minerals, but in certain conditions copper can reside in muscovite and chlorite 42 , which are present in the 700 °C experiment products. In chlorite, Cu 2+ can substitute for Fe 2+ and Mg 2+ in the octahedral structural site 42 .…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Copper is a chalcophile element and it preferably resides in sulphide minerals, but in certain conditions copper can reside in muscovite and chlorite 42 , which are present in the 700 °C experiment products. In chlorite, Cu 2+ can substitute for Fe 2+ and Mg 2+ in the octahedral structural site 42 .…”
Section: Resultsmentioning
confidence: 99%
“…Copper is a chalcophile element and it preferably resides in sulphide minerals, but in certain conditions copper can reside in muscovite and chlorite 42 , which are present in the 700 °C experiment products. In chlorite, Cu 2+ can substitute for Fe 2+ and Mg 2+ in the octahedral structural site 42 . Limited heterovalent Fe 2+ and Mg 2+ substitution is known to take place in muscovite 43 , hence it might also incorporate Cu 2+ in its crystal structure.…”
Section: Resultsmentioning
confidence: 99%
“…All mentioned silicates were synthesized in systems with high oxygen fugacity and atmospheric pressure by sintering of oxide mixtures, with or without flux. Finds of Cu-bearing micas and amphiboles in nature are known (Wang et al 2019;Chukanov et al 2020;Varlamov et al 2021). Thus, the content of CuO in biotite from the Mulyashy copper mine (Zambia) is up to 6.0 wt.% and up to 1.4 wt.% in magnesio-riebeckite from metasomatic rocks of the Pelagonian Massif (Republic of North Macedonia), one of the rare example of sulfide-free endogenic ores with diverse oxygen-bearing minerals of Sb 5+ , Zn, Pb and Cu.…”
Section: Formation Conditions Of Cu-rich Anhydrous Silicatesmentioning
confidence: 99%