BazTech - Yadda

1

Hydrothermal ore mineralization from the Polish part of the Tatra Mts., Central Western Carpathians

Sitarz Magdalena, Gołębiowska Bożena, Nejbert Krzysztof, Dimitrova Dimitrina, Milovský Ratislav

Geology, Geophysics and Environment

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2021

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Vol. 47, no. 3

159--179

EN

Several areas with hydrothermal ore mineralization are present in the Polish part of the Western Tatra Mts. Massive and disseminated sulfides, mainly minerals from the tetrahedrite group and chalcopyrite, fill quartz veins accompanied by siderite, dolomite and baryte – many of these were mined between the 16th and 18th century. This paper presents information on the mineralogy of the common sulfides and the preliminary studies of both the isotopic composition of sulfur in tetrahedrite as well as the origin of hydrothermal fluids. The most common primary sulfide minerals in the ores are tetrahedrite-(Zn) and tetrahedrite-(Fe) corresponding to Zn ranges from 1.83 to 5.87 wt.% (0.47–1.44 apfu), and Fe from 1.63 to 5.05 wt.% (0.48–1.52 apfu). The substitution of As for Sb shows maximum As content of 7.25 wt.% (1.588 apfu) which corresponds to the Sb/(Sb+As) = 0.60. Both varieties show substitutions of Bi and Hg, up 0.6 wt.% (0.049 apfu) and 0.96 wt.% (0.081 apfu), respectively, and content of trace elements: Co (max. 976 ppm), Cd (max. 735 ppm), In (max. 14 ppm). Chalcopyrite, pyrite, and galena show compositions close to the ideal formula. Differences in the content of trace elements in the studied tetrahedrite and chalcopyrite were explained by element partitioning between these minerals. The distributions of In, Ga and Sn in the studied minerals indicate that the mineralization was formed at low temperature and pressure. The homogenization temperature of the primary inclusions in quartz in the range of 120–174°C indicate the origin of mineralization in low temperature stage from low salinity fluids (up to 17.92 wt.% NaCl eq.). Stable δ34S isotopes in minerals of the tetrahedrite group suggest that the igneous fluids might be one of the sources from which ores were crystallized.

2

The influence of self-doping of stibnite ore with impurities on the preparation, heat capacity, magnetic and transport properties of tetrahedrite Cu12Sb4S13

Chen Yuqi, Li Liang, Zhang Qianjun, Zhang Congzheng, Hirai Shinji

Materials Science Poland

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2020

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Vol. 38, No. 3

484-492

EN

Stibnite mineral (mainly Sb2S3) has been employed for the synthesis of tetrahedrite Cu12Sb4S13 bulk material by spark plasma sintering. High purity Cu12Sb4S13 can be quickly obtained by two sintering procedures at temperatures from the range of 420 °C to 440 °C for 1 h. Appropriate reduction of Cu content (Cu12+xSb4S13, x ⩽ –0.05) or CuS content (Cu12−ySb4S13−y, y = 0.1 or 0.3) was beneficial to fabricate Cu12Sb4S13. The secondary resintering improved the purity of Cu12Sb4S13 material. The first-order magnetic phase transformation with magnetic hysteresis effect was confirmed by the behavior of susceptibility, heat capacity and resistivity. The magnetization showed a linear increase with increasing field (up to 7 T) and non-saturation behavior was observed. The impurities in stibnite mineral Sb2S3 had a weak influence on the transformation temperature but affected the low-temperature magnetization value (~0.15, close to natural tetrahedrite). Similar transformation was observed by the analysis of heat capacity. The properties such as electrical resistivity, Seebeck coefficient and thermal conductivity were also measured for Cu11.9Sb4S13 and Cu11.9Sb4S12.9. The maximum figure of merit ZT of Cu11.9Sb4S12.9 was 0.22 at 367 K.

3

Study of Chemical Pollutants and the Methods of Economic Reconstruction of the Rovinar Basin

Matei Raluca, Dunca Emilia-Cornelia, Matei Aronel

Inżynieria Mineralna

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2020

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no. 1, vol. 2

109--113

EN

Soil being considered as a resource at anyone's disposal in quantities at its discretion, so there is currently no interest from economic agents to recover and use it efficiently. At the global level, both law and NGOs increasingly require ongoing land use monitoring for the purpose of soil conservation, requiring studies, field and laboratory investigations, prevention, prevention and control projects, methods and techniques. The paper will focus on the analysis of chemical parameters and pollutants (pH, humus, SB, T, total content of N. P, K, Ca, Mg, total Fe, Mn, Cu, Co, Ni, Pb, sulphites, nitrites, pesticides, complex hydrocarbons), the concentration of heavy metals (Cd, Hg, Zn, Pb) of the objectives in the Rovinari basin.

PL

Gleba jest uważana za zasób do dyspozycji każdego w ilościach według własnego uznania, więc podmioty gospodarcze nie są obecnie zainteresowane odzyskaniem i efektywnym wykorzystaniem. Na poziomie globalnym zarówno prawo, jak i organizacje pozarządowe coraz częściej wymagają ciągłego monitorowania użytkowania gruntów w celu ochrony gleby, wymagając badań, badań terenowych i laboratoryjnych, projektów, metod i technik zapobiegania, zapobiegania i kontroli. Artykuł koncentruje się na analizie parametrów chemicznych i zanieczyszczeń (pH, próchnicy, SB, T, całkowitej zawartości N, P, K, Ca, Mg, całkowitej Fe, Mn, Cu, Co, Ni, Pb, siarczynów, azotynów, pestycydy, złożone węglowodory), stężenie metali ciężkich (Cd, Hg, Zn, Pb) terenów w dorzeczu Rovinari.

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Possibilities of Tetrahedrite Separation from Polymetallic Ore

Marcin Michal, Sisol Martin, Varga Peter, Brezani Ivan, Matasovsky Michal, Oravcova Andrea

Inżynieria Mineralna

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2020

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no. 1, vol. 2

105--108

EN

Using the separation methods, the tetrahedrite concentrate, which contains multiple elements, was obtained from the tetrahedrite ore. We focused mainly on copper, but also on iron and antimony. Ore also contains undesirable elements such as arsenic or mercury. The aim of this paper is an efficient separation of the utility components. Gravity separation and flotation was used. The first processing step was gravity separation on shaking table the second step was froth flotation in flotation column.

PL

Stosując metody separacji otrzymano z tetraedrytu koncentrat który zawiera wiele pierwiastków, Autorzy skupili się głównie na miedzi, żelazie i antymonie. Ruda zawiera również niepożądane pierwiastki, takie jak arsen lub rtęć. Celem przedstawionej pracy jest efektywne oddzielenie składników użytecznych. Zastosowano separację grawitacyjną i flotację. Pierwszym etapem przetwarzania było oddzielenie grawitacyjne na stole wytrząsającym, drugim etapem była flotacja pianowa w kolumnie flotacyjnej.

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Geochemistry of tetrahedrite group minerals and associated silver paragenesis in the Boguszów baryte deposit, Poland

Mederski Sławomir, Pršek Jaroslav, Niemasz Żaneta

Geological Quarterly

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2020

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Vol. 64, No. 4

958--968

EN

Primary ore mineralization in the abandoned Boguszów baryte-polymetallic deposit, located in the Intra-Sudetic Depression, was studied by reflected light microscopy and electron microprobe. Ore minerals, occurring as veinlets, irregular aggregates and lenses in baryte veins are hosted by the Upper Carboniferous Chełmiec rhyodacite laccolith. They are dominated by galena, sphalerite (with Cd up to 0.04 apfu) and tetrahedrite group minerals (TGM). Four generations of the TGM were distinguished according to textural features and Ag content: (1) low-Ag tetrahedrite-(Zn) (Ag: 0.22-0.6 apfu), (2) Ag-enriched tetrahedrite-(Zn) and Ag-enriched tetrahedrite-(Fe) (Ag: 0.71-1.45 apfu), (3) members of the freibergite series: “freibergite-(Fe)” and “freibergite-(Zn)” (Ag: 3.21-3.48 apfu; Hg: up to 0.75 apfu), (4) member of the “freibergite-(Fe)” series (Ag: 5.32-5.78 apfu). Several elongated inclusions of Ag-bearing sulphosalts within galena crystals were observed (members of the series “freibergite-(Fe)” and “freibergite-(Zn)”, pyrargyrite and polybasite). These polymetallic silver-bearing ores were mined in Boguszów from the 15th to the 19th century. Additionally, small grains of cobalt-enriched löllingite and gersdorffite were observed, which were formed from fluids sourced from the ultramafic basement. The textural characteristics of the ore, the mineral paragenesis and the chemical composition of individual ore minerals indicate low-temperature crystallization conditions.

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Structural and thermal properties of tetrahedrites prepared by FAST method

Chetty R., Wojciechowski K.

Mechanik

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2016

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R. 89, nr 5-6

510--511

EN

In this investigation, a parent compound Cu12Sb4S13 and doped compound Cu11ZnSb4S13 is prepared by solid state synthesis followed by the Field Assisted Sintering Technique. XRD reveals tetrahedrite as a main phase and trace amount of impurity phases. Effect of doping on thermal conductivity of tetrahedrite is discussed.

PL

Przeprowadzono badania czystego tetraedrytu o skła-dzie Cu12Sb4S13 oraz domieszkowanego Cu11ZnSb4S13 otrzymanego na drodze syntezy w stanie stałym, a następnie prasowanego techniką FAST. Badania XRD potwierdziły obecność głównej fazy o strukturze tetraedrytu oraz śladową ilość zanieczyszczeń. Omówiono wpływ domieszkowania na przewodność cieplną tetraedrytu.