Chemical-structural modularity in the tetradymite group: A HRTEM study

Ciobanu, Cristiana L.; Pring, Allan; Cook, Nigel J.; Self, Peter; Jefferson, D. A.; Dima, Gabriel I.; Melnikov, Volodymir

doi:10.2138/am.2009.2906

Cited by 38 publications

(109 citation statements)

References 11 publications

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“…conside ration of Bi-Pb modules approach), similar to those described by Ciobanu et al (2009b) could also explain the composition of unnamed phases A and B.…”

Section: Identification Of Tetradymite Group Speciessupporting

confidence: 57%

Bi-sulphotellurides associated with Pb – Bi – (Sb ± Ag, Cu, Fe) sulphosalts: an example from the Stan Terg deposit in Kosovo

Kołodziejczyk¹,

Pršek²,

Voudouris³

et al. 2017

Geologica Carpathica

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New mineralogical and mineral-chemical data from the Stan Terg deposit, Kosovo, revealed the presence of abundant Bi-sulphotellurides associated with Bi-and Sb-sulphosalts and galena in pyrite-pyrrhotite-rich skarn-free ore bodies (ores without skarn minerals). The Bi-bearing association comprises Bi-sulphotellurides (joséite-A, joséite-B, unnamed phase A with a chemical formula close to (Bi,Pb) 2 (TeS) 2 , unnamed phase B with a chemical composition close to (Bi,Pb) 2.5 Te 1.5 S 1.5 ), ikunolite, cosalite, Sb-lillianite, members of the kobellite series and Bi-jamesonite. Compositional trends of the Bi-sulphotellurides suggest lattice-scale incorporation of Bi-(Pb)-rich module and/or admixture with submicroscopic PbS layers in modulated structures, or complicated Bi-Te substitution. Cosalite is characterized by high Sb (max. 3.94 apfu), and low Cu and Ag (up to 0.72 apfu of Cu+Ag). Jamesonite from this mineralization has elevated Bi content, from 0.85 to 2.30 apfu. The negligible content of Au and Ag in the Bi-sulphotellurides, the low content of Ag in Bi-sulphosalts, together with the lack of Au-Ag bearing phases in the mineralization, indicate either ore deposition from fluid(s) depleted in precious metals, or physico-chemical conditions of ore formation preventing Au and Ag precipitation at the deposit site. The temperature of initial mineralization may have exceeded 400 ºC as suggested by the lamellar exsolution textures observed in lillianite, which indicate breakdown textures from decomposition of hightemperature initial crystals. Non-stoichiometric phases among the Bi-sulphosalts and sulphotellurides studied at Stan Terg reflect modulated growth processes in a metasomatic environment.

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“…conside ration of Bi-Pb modules approach), similar to those described by Ciobanu et al (2009b) could also explain the composition of unnamed phases A and B.…”

Section: Identification Of Tetradymite Group Speciessupporting

confidence: 57%

Bi-sulphotellurides associated with Pb – Bi – (Sb ± Ag, Cu, Fe) sulphosalts: an example from the Stan Terg deposit in Kosovo

Kołodziejczyk¹,

Pršek²,

Voudouris³

et al. 2017

Geologica Carpathica

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“…In the Beregove deposit Bі-sulfosalts occur as the inclusions in galenite grains found in fine-grained quartz and adularia-quartz aggregates [2]. The same genesis is observed in the ores of the Banska Shtiavnitsa-Hodrusha deposits [5].…”

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confidence: 89%

“…The behavior of bismuth in gold mineralization process is similar to the behaviour of gold itself, that's why when mineralogical and geochemical investigations are carried special attention is commonly paid to this element. Gold, silver, bismuth and tellurium prove to be genetically related due to their spatial affinity and common features of crystallisation during hydrothermal process [2]. Similarly, bismuth minerals are indicative of gold-bearing paragenesises, and are found in, virtually, all gold-bearing deposits discovered on the territory of the Ukrainian trans-Carpathians and Slovakia [8; 11].…”

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confidence: 99%

“…Despite the fact that in most cases bismuth minerals form submicroscopic segregations, they can serve as indicators of physical and chemical conditions of ore formation because their composition is highly sensitive to slight variations in temperature, Eh-pH, fTe 2 , fS 2 , fSe 2 , fO 2 , and some other parameters.…”

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confidence: 99%

“…the Ag-Bі-Pb sulphosalts represented by matilditeAgBі 2 3. the Cu-Pb-Bі sulphosalts represented by the intermediary aikinite CuPbBі 3 -bismuthite Bі 2 S 3 series. They are widespread in the aggregates of the Banska ShtiavnitsaHodrusha deposits [4] in the form of intergrowths with AgPb-Bі sulphosalts, chalcopyrite and bismutite.…”

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confidence: 99%

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Bismuth Mineralization in Neogene Volcanites of Ukrainian Carpathians and Slovakia

Elen¹,

Skakun²,

Grinchenko³

et al. 2014

VKNUGEOL

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(Рекомендовано членом редакційної колегії доктором геол. наук, доц. С.Є. Шнюковим) The paper discusses distributional features of bismuth mineralization in the Neogene volcanites covering Ukraine and Slovakia. Bismuth is a typical element of many gold, polymetallic, and copper-porphyry Neogene deposits of the Ukrainian trans-Carpathians and Slovakia. Due to its intrinsic minerability, bismuth produces sundry minerals that are sensitive to certain physical and chemical environment. Therefore, studying bismuth features reveals principles of ore formation. Despite the fact that bismuth minerals mostly form submicroscopic aggregates, they can be indicators of the physical and chemical environment essential to form ore systems, for their composition is highly sensitive to minor variations in such parameters as temperature, Eh-pH, fTe 2 , fS 2 , fSe 2 , fO 2 , and others.Both within the trans-Carpathian region of Ukraine and on the territory of Slovakia there are distinctly traced two stages of bismuth mineralization, both being synchronous with volcanic eruptions of the Miocene and Pliocene ages, accordingly. Each stage of volcanic ejection reveals a certain typo-morph of bismuth minerals and a different degree of bismuth mineralization manifestation. It has been established that bismuth sulphosalts are the products of the Miocene volcanites and the associated epithermal deposits, while manifestations of bismuth-tellurium mineralization are widespread in the metasomatically altered volcanites of the Pliocene age.Miocene epithermal deposits are characterized by native gold-Bi-sulphosalts-bismutite-chalcopyrite-quartz paragenesis formed from neutral solutions persisting adularia due to the replacement of the earlier formed sulphides, mostly galenite. This stage shows the reduction of Ag/Cu ratio in time. Minerals going through a number of phases during mineralization is put down to the fact that most of them form metastable and intermediate links during metasomatic replacements caused by spatial and time variations in hydrothermal solutions.Bismuth-tellurium-selenic mineralization is distributed in the metasomatically altered Pliocene volcanites of the Vyhorlat-Ghuta ridge. Bismuth-tellurium ore manifestations are associated with high-temperature pneumatolytic-hydrothermal systems, with acid solutions being predominant, which is proved by a wide distribution of kaolinite-hydromica metasomatites. Broad distribution of Bi-Te-Se mineralization in the Pliocene volcanites of the Vyhorlat-Ghuta ridge provides evidence to considering this structure a unique metallogenic province on the European continent.

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Switching of the Natural Nanostructure in Bi₂Te₃ Materials by Ion Irradiation

2012

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Chemical-structural modularity in the tetradymite group: A HRTEM study

Cited by 38 publications

References 11 publications

Bi-sulphotellurides associated with Pb – Bi – (Sb ± Ag, Cu, Fe) sulphosalts: an example from the Stan Terg deposit in Kosovo

Bi-sulphotellurides associated with Pb – Bi – (Sb ± Ag, Cu, Fe) sulphosalts: an example from the Stan Terg deposit in Kosovo

Bismuth Mineralization in Neogene Volcanites of Ukrainian Carpathians and Slovakia

Switching of the Natural Nanostructure in Bi₂Te₃ Materials by Ion Irradiation

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Chemical-structural modularity in the tetradymite group: A HRTEM study

Cited by 38 publications

References 11 publications

Bi-sulphotellurides associated with Pb – Bi – (Sb ± Ag, Cu, Fe) sulphosalts: an example from the Stan Terg deposit in Kosovo

Bi-sulphotellurides associated with Pb – Bi – (Sb ± Ag, Cu, Fe) sulphosalts: an example from the Stan Terg deposit in Kosovo

Bismuth Mineralization in Neogene Volcanites of Ukrainian Carpathians and Slovakia

Switching of the Natural Nanostructure in Bi2Te3 Materials by Ion Irradiation

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Switching of the Natural Nanostructure in Bi₂Te₃ Materials by Ion Irradiation