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Artículos de revistas sobre el tema "Metal sulphides"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Barnes, Sarah-Jane, M. L. Zientek, and M. J. Severson. "Ni, Cu, Au, and platinum-group element contents of sulphides associated with intraplate magmatism: a synthesis." Canadian Journal of Earth Sciences 34, no. 4 (1997): 337–51. http://dx.doi.org/10.1139/e17-030.

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The tectonic setting of intraplate magmas, typically a plume intersecting a rift, is ideal for the development of Ni – Cu – platinum-group element-bearing sulphides. The plume transports metal-rich magmas close to the mantle–crust boundary. The interaction of the rift and plume permits rapid transport of the magma into the crust, thus ensuring that no sulphides are lost from the magma en route to the crust. The rift may contain sediments which could provide the sulphur necessary to bring about sulphide saturation in the magmas. The plume provides large volumes of mafic magma; thus any sulphide

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2

Eman, M. Ismael, M. Abdellah Islam, E. M. Bakheet Momtaz, and R. Eletmany Mohamed. "Mini Review on Nano Materials Synthesis and Applications in Metal Sulphides." Mini Review on Nano Materials Synthesis and Applications in Metal Sulphides 8, no. 12 (2023): 13. https://doi.org/10.5281/zenodo.10301800.

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Nanotechnology has attracted considerable interest due to its ability to manipulate matter at the atomic and molecular levels.This comprehensive review focuses on nanomaterials, specifically emphasizing metal sulphides, elucidating their distinctive properties and applications. Nanoparticles, integral components of nanostructures, manifest unique physical and chemical traits divergent from bulk materials, rendering them appealing for diverse industrial uses. The review provides a detailed categorization of nanomaterials based on dimensions, encompassing 1D (surface films), 2D (monolayer materi

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3

Vikentyev, Ilya, Olga Vikent’eva, Eugenia Tyukova, et al. "Noble Metal Speciations in Hydrothermal Sulphides." Minerals 11, no. 5 (2021): 488. http://dx.doi.org/10.3390/min11050488.

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A significant part of the primary gold reserves in the world is contained in sulphide ores, many types of which are refractory in gold processing. The deposits of refractory sulphide ores will be the main potential source of gold production in the future. The refractory gold and silver in sulphide ores can be associated with micro- and nano-sized inclusions of Au and Ag minerals as well as isomorphous, adsorbed and other species of noble metals (NM) not thoroughly investigated. For gold and gold-bearing deposits of the Urals, distribution and forms of NM were studied in base metal sulphides by

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4

Smyk, Mark C., and David H. Watkinson. "Sulphide remobilization in Archean volcano-sedimentary rocks and its significance in Proterozoic silver vein genesis, Cobalt, Ontario." Canadian Journal of Earth Sciences 27, no. 9 (1990): 1170–81. http://dx.doi.org/10.1139/e90-124.

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The Archean volcano-sedimentary succession at Cobalt, Ontario, consists mainly of submarine andesitic flows and turbiditic interflow sedimentary rocks. Steeply dipping faults and large-scale, tight to isoclinar folds have developed in these basement rocks. The faults commonly host silver-vein-bearing structures that extend upward into overlying Proterozoic units. Synvolcanic and synsedimentary base metal sulphide deposits are ubiquitous in the Archean rocks. Epigenetic sulphide mineralization consists of remobilized and replacement sulphides and minor sulpharsenides. Epigenetic sulphides occur

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5

Prokkola, Hanna, Emma-Tuulia Nurmesniemi, and Ulla Lassi. "Removal of Metals by Sulphide Precipitation Using Na2S and HS−-Solution." ChemEngineering 4, no. 3 (2020): 51. http://dx.doi.org/10.3390/chemengineering4030051.

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Precipitation of metals as metal sulphides is a practical way to recover metals from mine water. Sulphide precipitation is useful since many metals are very sparingly soluble as sulphides. Precipitation is also pH dependent. This article investigates the precipitation of metals individually as sulphides and assesses which metals are precipitated as metal hydroxides by adjustment of the pH. The precipitation of different metals as sulphides was studied to determine the conditions under which the HS− solution from the sulphate reduction reaction could be used for precipitation. H2S gas and ionic

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6

Ofori-Sarpong, G., D. K. Adjei, and R. K. Amankwah. "Fungal-Transformation of Surrogate Sulphides and Carbonaceous Matter in Refractory Gold Ores: Revisited." Ghana Mining Journal 17, no. 2 (2017): 56–65. http://dx.doi.org/10.4314/gm.v17i2.8.

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In the recovery of gold from refractory gold ores, pretreatment is required to decompose sulphides and liberate occluded gold before cyanidation, and to deactivate carbonaceous matter and prevent it from adsorbing dissolved gold. Until the past three decades, most commercial pretreatment processes had been by abiotic means. Biological pretreatment methods on commercial basis is therefore a recent phenomenon, and several researches are underway to assess the ability of different biological agents in the breakdown of sulphur and carbonaceous matter (CM) in gold ores. This paper, which is a revis

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7

Merkle, Roland K. W. "Platinum-group minerals in the middle group of chromitite layers at Marikana, western Bushveld Complex: indications for collection mechanisms and postmagmatic modification." Canadian Journal of Earth Sciences 29, no. 2 (1992): 209–21. http://dx.doi.org/10.1139/e92-020.

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The platinum-group minerals in a drill core taken through the middle group of chromitite layers in the Critical Zone at Marikana in the western Bushveld Complex were found to consist mainly of laurite as inclusions in chromite grains. The platinum-group minerals containing Pt, Pd, and Rh are concentrated in the intercumulus silicates and frequently associated with base-metal sulphides. Up to about 20% of all platinum-group minerals in the investigated chromitite layers contain sub stantial amounts of As. The base-metal sulphides are strongly modified in the postmagmatic stage, which led to a s

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8

Pieczonka, Jadwiga. "Polymetallic mineralization in Triassic strata of the NW part of the Kraków-Częstochowa Monocline." Mineralogia 41, no. 1-2 (2010): 35–53. http://dx.doi.org/10.2478/v10002-010-0004-1.

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Polymetallic mineralization in Triassic strata of the NW part of the Kraków-Częstochowa MonoclineA new association of ore minerals has been found in the Lower and Middle Triassic rocks in the vicinity of the village of Woźniki in the NW part of the Upper Silesian district. In addition to the typical Zn-Pb-Fe association in dolomites, copper sulphides have been detected in the sandstones and conglomerates of the Lower Bunter. Copper mineralization occurs in the sandstone matrix and is represented by bornite, chalcopyrite, chalcocite, tetrahedrite and covellite. High admixtures of zinc in Cu sul

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9

Eliopoulos, Demetrios G., Maria Economou-Eliopoulos, George Economou, and Vassilis Skounakis. "Mineralogical and Geochemical Constraints on the Origin of Mafic–Ultramafic-Hosted Sulphides: The Pindos Ophiolite Complex." Minerals 10, no. 5 (2020): 454. http://dx.doi.org/10.3390/min10050454.

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Sulphide ores hosted in deeper parts of ophiolite complexes may be related to either primary magmatic processes or links to hydrothermal alteration and metal remobilization into hydrothermal systems. The Pindos ophiolite complex was selected for the present study because it hosts both Cyprus-type sulphides (Kondro Hill) and Fe–Cu–Co–Zn sulphides associated with magnetite (Perivoli-Tsoumes) within gabbro, close to its tectonic contact with serpentinized harzburgite, and thus offers the opportunity to delineate constraints controlling their origin. Massive Cyprus-type sulphides characterized by

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10

Harris, D. L., and B. G. Lottermoser. "Phosphate stabilization of polyminerallic mine wastes." Mineralogical Magazine 70, no. 1 (2006): 1–13. http://dx.doi.org/10.1180/0026461067010309.

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AbstractPolyminerallic, sulphidic mine wastes were treated with KH2PO4-H2O2 solutions to determine whether the formation of solid phosphate coatings inhibits sulphide oxidation and metal and metalloid mobility. The waste rocks were metal (PbZnCu) and metalloid (AsSb) rich and consisted of major quartz, dickite, illite and sulphide minerals (e.g. galena, chalcopyrite, tetrahedrite, sphalerite, pyrite, arsenopyrite) as well as minor to trace amounts of pre- and post-mining oxidation products (e.g. oxides, hydroxides, arsenates and sulphates). Scanning electron microscopy observations of the wast

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11

Zhang, YiRan, Nawoong Yoon, and Maria E. Holuszko. "Assessment of Sortability Using a Dual-Energy X-ray Transmission System for Studied Sulphide Ore." Minerals 11, no. 5 (2021): 490. http://dx.doi.org/10.3390/min11050490.

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In hard rock mining, sensor-based sorting can be applied as a pre-concentration method before the material enters the mill. X-ray transmission sensors have been explored in mining since 1972. Sorting ore of acceptable grade and waste material before processing at the mill can reduce the amount of tailings per unit of valuable metal in the mining operation and have many economic benefits. Ore samples used in this paper are from a polymetallic carbonate replacement deposit (gold-silver-lead-zinc sulphide) in Southeast Europe. This paper focuses on how the Dual-Energy X-ray Transmission (DE-XRT)

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12

Oszczepalski, Sławomir, and Andrzej Chmielewski. "Mineralization of the Zechstein Lower Anhydrite in the Fore-Sudetic Monocline." Biuletyn Państwowego Instytutu Geologicznego 472, no. 472 (2018): 135–54. http://dx.doi.org/10.5604/01.3001.0012.7116.

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The paper presents the characteristics of ore mineralization of the Lower Anhydrite in the Fore-Sudetic Monocline. Both reduced and oxidized (Rote Fäule) rocks have been investigated. Reduced anhydrites are characterized by significant variability of metal concentrations and sulphide minerals. The most intensely mineralized anhydrites occur above the oxidized bottom part of the Lower Anhydrite. Mineralization in this part is dominated by copper sulphides (chalcocite, digenite, covellite, bornite and chalcopyrite) which are accompanied by galena and sphalerite. Further away from the oxidized zo

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13

Meyer, Edson, Asanda Bede, Nyengerai Zingwe, and Raymond Taziwa. "Metal Sulphides and Their Carbon Supported Composites as Platinum-Free Counter Electrodes in Dye-Sensitized Solar Cells: A Review." Materials 12, no. 12 (2019): 1980. http://dx.doi.org/10.3390/ma12121980.

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Energy sufficiency is a critical requirement for the economic prosperity of modern countries. Efficient harnessing of solar energy using technologies such as the dye-sensitized solar cell could solve the energy problem which persistently plagues developing countries. Despite having a simple operational procedure and modest power conversion efficiency of 13.8%, the dye-sensitized solar cell consists of an expensive platinum counter electrode which makes commercial success futile. Thus, this review intends to establish the progress researchers have attained in the development of sulphide based c

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14

Al-Tarazi, Mousa, A. Bert M. Heesink, and Geert F. Versteeg. "Precipitation of metal sulphides using gaseous hydrogen sulphide: mathematical modelling." Chemical Engineering Science 59, no. 3 (2004): 567–79. http://dx.doi.org/10.1016/j.ces.2003.11.006.

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15

Labaj, Ivan, Darina Ondrušová, Andrej Dubec, Mariana Pajtášová, Marcel Kohutiar, and Beata Pecušová. "Study of new rubber to steel adhesive systems based on Co(II) and Cu(II) sulphides coats." MATEC Web of Conferences 157 (2018): 07004. http://dx.doi.org/10.1051/matecconf/201815707004.

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The presented paper deals with the preparation of new rubber to steel adhesive systems using the steel surface treatment with deposition of adhesive coats based on Co(II) and Cu(II) sulphides. Efficiency of new prepared adhesive systems containing Co(II) and Cu(II) sulphides has been compared with the efficiency of double layer adhesive system commonly used in industry. The chemical composition of prepared adhesive systems was determined using the EDX analysis. Scanning Electron Microscopy (SEM) was used for study of topography and microstructure of prepared rubber to steel adhesive systems (C

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16

Semenov, Victor N., and Alexander V. Naumov. "Interaction of metal sulphides in films deposited from solutions of thiourea coordination compounds. Review." Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 23, no. 3 (2021): 337–52. http://dx.doi.org/10.17308/kcmf.2021.23/3525.

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Metal sulphides are highly important for the technology of semiconductor film materials. The potential of these compounds has not been exhausted yet when it comes to creating optoelectronic devices, solar cells, and luminescent devices based on them. The goal of this work was to determine the nature of interaction of sulphides in polycrystalline layers of CdS–MemSn, where Me are metals of groups I–VII of the periodic table. Cadmium sulphide was chosen as the common component of all studied systems due to the great photoelectric and luminescent properties of this well-studied material.It was sh

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17

Glukhov, A. N. "Base metal mineralization of the Kolyma terrain in Northeast Russia: Overview and genetic classification." LITHOSPHERE (Russia) 19, no. 5 (2019): 717–30. http://dx.doi.org/10.24930/1681-9004-2019-19-5-717-730.

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Research subject. The Prikolyma terrain located in the Northeastern part ofRussia constitutes a long-lived Precambrian thrust-faulted structure hosting numerous Cu, Pb and Zn deposits of different types.Materials and methods. The mineralization of the terrain was examined during a course of research and exploration works over the 2007–2012. The rock geochemistry was studied using ICP-OES analysis at the Stuart Geochemistry and Essay laboratory (Moscow). The microprobe analysis of minerals was carried out at the facilities of the Far Eastern Branch of the Russian Academy of Sciences (Magadan) u

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18

Veeken, A. H. M., and W. H. Rulkens. "Innovative developments in the selective removal and reuse of heavy metals from wastewaters." Water Science and Technology 47, no. 10 (2003): 9–16. http://dx.doi.org/10.2166/wst.2003.0525.

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Sulphide precipitation of heavy metal containing wastewaters results in low effluent concentrations. However, sulphide precipitation is not widely applied in practice because the dosing of sulphide cannot adequately be controlled. A new process was developed where the combination of a sulphide-selective electrode (pS-electrode) and pH electrode controls the sulphide addition. Precipitation experiments were performed on a laboratory-scale in batch and continuous reactor systems with synthetic wastewaters containing Cd, Cu, Ni, Pb or Zn. The response of the pS-electrode during precipitation was

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19

Danielewski, Marek. "Diffusion in Transition Metal Sulphides." Defect and Diffusion Forum 66-69 (January 1991): 257–58. http://dx.doi.org/10.4028/www.scientific.net/ddf.66-69.257.

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20

Van Dover, Cindy Lee. "Mining seafloor massive sulphides and biodiversity: what is at risk?" ICES Journal of Marine Science 68, no. 2 (2010): 341–48. http://dx.doi.org/10.1093/icesjms/fsq086.

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Abstract Van Dover, C. L. 2011. Mining seafloor massive sulphides and biodiversity: what is at risk? – ICES Journal of Marine Science, 68: 341–348. Scientific exploration of the deep sea in the late 1970s led to the discovery of seafloor massive sulphides at hydrothermal vents. More recently, sulphide deposits containing high grades of ore have been discovered in the southwest Pacific. In addition to metal-rich ores, hydrothermal vents host ecosystems based on microbial chemoautotrophic primary production, with endemic invertebrate species adapted in special ways to the vent environment. Altho

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21

Mikulski, Stanisław Z., Katarzyna Sadłowska, Janina Wiszniewska, and Rafał Małek. "Vanadium and Cobalt Occurrence in the Fe-Ti-V Oxide Deposits Related to Mesoproterozoic AMCG Complex in NE Poland." Applied Sciences 12, no. 12 (2022): 6277. http://dx.doi.org/10.3390/app12126277.

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On the basis of geochemical whole-rock and mineralogical point analyses, the concentrations of V and Co were determined in magnetite-ilmenite oxide ores, associated with sulphides, at the Krzemianka and Udryn deposits in the Mesoproterozoic Suwałki Anorthosite Massif (SAM) in NE Poland. EPMA analyses showed that the main carrier of vanadium was magnetite (mean = 0.42 wt%) and, to a lesser extent, ilmenite (mean = 0.14 wt%) and minor Al-spinels (mean = 0.04 wt%). In turn, cobalt was found mainly in the form of isomorphic substitutions in magmatic sulphides such as pentlandite (mean = 4.41 wt% C

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22

Kotzé, E., and C. Gauert. "PGE distribution in the chromitite layers at Eastern Chrome Mine, Eastern Bushveld Complex, South Africa: A descriptive study with comparison of EPMA and LA-ICP-MS methods for detection of trace PGE in base metal sulphides." South African Journal of Geology 123, no. 4 (2020): 551–72. http://dx.doi.org/10.25131/sajg.123.0033.

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Abstract A descriptive petrographic study was carried out on the chromitites (LG-6 to UG-3a) of a single borehole from the Winterveld Chrome Mine, Eastern BC, along with analysis by both EPMA and LA-ICP-MS of the PGE contents of base metal sulphides (BMS) found within these layers. EPMA measurements were optimized to measure trace amounts of PGE by increased probe current and counting time, yielding very low detection limits for this method (12 to 38 ppm). However, analytical error proved to be very high (over ~30%) in samples that showed PGE values below 100 ppm. Also, the possibility of inte

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23

Salman, Nadher Ali, and Kafa Khalaf Hammud. "Phy-X/PSD and NGCAL Models of Several Metal Sulphides: Theoretical Prediction of Gamma Shielding Efficiency." Iraqi Journal of Industrial Research 11, no. 3 (2024): 94–118. https://doi.org/10.53523/ijoirvol11i3id480.

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Various metal sulphides were selected for gamma and neutron shielding prediction by (Phy-X and NGCAL). The gamma parameters calculated by both software programs in the studied energy range were found to be identical, with differences (Δ% less than 1%) between both models. The Mass Attenuation Coefficient (MAC), Mean Free Path (MFP), Half Value Layer (HVL), Tenth Value Layer (TVL), and Effective Atomic Number (Zeff) were calculated. Ag2S was a superior neutron and photon attenuator because it contains two silver ions with the highest density, mean atomic number, and metal composition in additio

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24

Vokes, F. M., and J. R. Craig. "Post-recrystallisation mobilisation phenomena in metamorphosed stratabound sulphide ores." Mineralogical Magazine 57, no. 386 (1993): 19–28. http://dx.doi.org/10.1180/minmag.1993.057.386.03.

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AbstractMetamorphosed stratabound iron- and base-metal sulphide deposits often exhibit microtextures in which fractures in cataclastically-deformed pyrite porphyroblasts are filled with matrix sulphides; chalcopyrite, sphalerite, pyrrhotite or galena. Discussions of such textures have mostly centred on whether solid-phase or fluid-phase mechanisms were responsible for the movement of the matrix sulphides.The small Zn-Cu sulphide body at Gressli, in the central Norwegian Caledonides, shows these textural features to an extreme degree. Both chalcopyrite and sphalerite show heavy replacive relati

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25

Luptáková, Alena, Stefano Ubaldini, Eva Mačingová, and Ingrida Kotuličová. "Study of Precipitating Methods for Elimination of Heavy Metals from Acid Mine Drainage." Nova Biotechnologica et Chimica 11, no. 2 (2012): 133–38. http://dx.doi.org/10.2478/v10296-012-0015-y.

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Abstract The submitted paper deals with the study of combination of chemical and biological-chemical methods for the heavy metals elimination from the acid mine drainage. The experiments were carried out at the laboratory scale using a synthetic solution with similar properties to the real sample of acid mine drainage, originating from the zinc mine located in Tùnel Kingsmill outflow of the Rio Yaulì (district of Yauli - Perù). The successive repetition of the metal precipitations as hydroxides (chemical method) and sulphides (biological-chemical method) at the various acid mine drainage pH wa

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26

Vandentop, G. J., M. A. Karolewski, and Ronald G. Cavell. "Secondary ion mass spectra of metal sulphides." International Journal of Mass Spectrometry and Ion Processes 89, no. 2-3 (1989): 319–42. http://dx.doi.org/10.1016/0168-1176(89)83067-8.

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27

Lacroix, M., N. Boutarfa, C. Guillard, M. Vrinat, and M. Breysse. "Hydrogenating properties of unsupported transition metal sulphides." Journal of Catalysis 120, no. 2 (1989): 473–77. http://dx.doi.org/10.1016/0021-9517(89)90287-x.

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28

Mrowec, S., and K. Hashimoto. "Chemical diffusion in non-stoichiometric metal sulphides." Journal of Materials Science 30, no. 19 (1995): 4801–16. http://dx.doi.org/10.1007/bf01154488.

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29

Bacsó, Zoltán. "The Brehov volcanogenic and stratabound base metal and gold deposit (Eastern Slovakia): Position and genetic relations in the Internal Carpathian–Alpine Cenozoic metallogenetic belt." Mineralia Slovaca 55, no. 1 (2023): 27–52. http://dx.doi.org/10.56623/ms.2023.55.1.3.

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The Brehov ore deposit, near the village of Brehov, is located in the East Slovakian Basin 15 km south-east of the Trebišov town. A progressive development of Middle Badenian to Middle Sarmatian sedimentation and volcanism in the Brehov hydrothermally mineralized area is manifested in the article. The volcanogenic, stratabound, polymetallic (Zn, Pb, Cu) and gold sulphide deposit within the Brehov–Sirník interpreted resurgent caldera occurs in the volcanosedimentary sequence. Mineralization in the deposit, consisting of the fine-grained aggregate of sulphides, is interpreted to be of shallow wa

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30

Biegger, Felix, Christoph Rameshan, Alexander K. Opitz, et al. "Thioether functionalised gallium and indium alkoxides in materials synthesis." New Journal of Chemistry 40, no. 8 (2016): 6962–69. http://dx.doi.org/10.1039/c6nj00402d.

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31

van den Berg, Gerard A., J. P. Gustav Loch, John J. G. Zwolsman, and Lambertus M. van der Heijdt. "Non-steady state behaviour of heavy metals in contaminated freshwater sediments." Water Science and Technology 37, no. 6-7 (1998): 39–46. http://dx.doi.org/10.2166/wst.1998.0733.

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The behaviour of heavy metals has been investigated in contaminated sediments of the river Meuse, The Netherlands. Due to temporal changes in temperature and degradability of organic matter, the depths of the redox boundaries fluctuate. This contributes to a non-steady state. As a result of oxidation processes, a distinct peak in heavy metal concentrations in pore water is measured at the sediment-water interface. Because the studied anoxic sediments contain low levels of sulphide, other solid phases are expected to be of importance in the binding of heavy metals. Furthermore, heterogeneity of

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32

Porzionato, Natalia, Mariangeles Mellota, Roberto Candal, and Gustavo Curutchet. "Acid Drainage and Metal Bioleaching by Redox Potencial Changes in Heavy Polluted Fluvial Sediments." Advanced Materials Research 825 (October 2013): 496–99. http://dx.doi.org/10.4028/www.scientific.net/amr.825.496.

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Sediments from polluted urban streams act as a sink of contaminants. The high content of organic matter and sulphides makes the system appropriate for binding heavy metals. However, changes in the redox potential leads to processes in which sediments acts like a low sulphidic ore in an oxidizing environment, and could generate acid drainages. Human and not human disturbances of the sediments could derive in its oxidation catalyzed by sulphur oxidizing bacteria (SOB). This process leads to acidification and metal release. In this study we analyze the acidification potential of anaerobic sedimen

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33

Kadu, Rahul, Vineeta Pillai, Amrit V. та Vinay K. Singh. "Synthesis and spectral characterization of bimetallic metallomacrocyclic structures [MII2-μ2-bis-{(κ2S,S-S2CN(R)C6H4)2O}] (M = Ni/Zn/Cd): density functional theory and host–guest reactivity studies". RSC Advances 5, № 129 (2015): 106688–99. http://dx.doi.org/10.1039/c5ra22175g.

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34

Powell, Anthony V., T. Erinc Engin, Paz Vaqueiro, and Steve Hull. "Simultaneous diffraction and resistance measurements of metal sulphides." Journal of Physics and Chemistry of Solids 68, no. 5-6 (2007): 1052–56. http://dx.doi.org/10.1016/j.jpcs.2006.12.018.

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35

Talapatra, A. K., R. C. Talukdar, and P. K. De. "Electrochemical technique for exploration of base metal sulphides." Journal of Geochemical Exploration 25, no. 3 (1986): 389–96. http://dx.doi.org/10.1016/0375-6742(86)90086-5.

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36

Divigalpitiya, W. M. R., R. F. Frindt, and S. R. Morrison. "Spread films of single molecular transition-metal sulphides." Applied Surface Science 48-49 (January 1991): 572–75. http://dx.doi.org/10.1016/0169-4332(91)90392-w.

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37

Jowett, E. Craig, Andrzej Rydzewsk, and Robin J. Jowett. "The Kupferschiefer Cu–Ag ore deposits in Poland: a re-appraisal of the evidence of their origin and presentation of a new genetic model." Canadian Journal of Earth Sciences 24, no. 10 (1987): 2016–37. http://dx.doi.org/10.1139/e87-192.

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The Kupferschiefer stratiform copper deposits in central Europe have long been considered a classic example of syngenetic mineralization. However, metal zoning and host-rock relationships determined during exploration around the recently discovered Lubin district orebodies in southwest Poland suggest that the ore may instead be late diagenetic. The mineralization occurs as thin, extensive blankets of sulphides in the pyritic, organic-rich basal units of the Late Permian Zechstein restricted marine sequence and in the eolian Weissliegendes sandstone at the top of the Early Permian Rotliegendes

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38

Zheng, G. D., T. B. Chen, D. Gao, and W. Luo. "Dynamic of lead speciation in sewage sludge composting." Water Science and Technology 50, no. 9 (2004): 75–82. http://dx.doi.org/10.2166/wst.2004.0539.

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A large-scale sewage sludge composting experiment was conducted to develop an understanding of changes that occur to Pb chemical speciation, distribution and bio-availability during the course of composting. The four-stage Tessier sequential extraction method was employed to investigate the dynamics of heavy metal Pb speciation (exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter and sulphides, residual) during the course of sewage sludge composting. The concentrations of the total Pb and the five Pb fractions concentrations were increased during the whole stage o

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Abraitis, P. K., R. A. D. Pattrick, G. H. Kelsall, and D. J. Vaughan. "Acid leaching and dissolution of major sulphide ore minerals: processes and galvanic effects in complex systems." Mineralogical Magazine 68, no. 2 (2004): 343–51. http://dx.doi.org/10.1180/0026461046820191.

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AbstractThe kinetics and mechanisms of dissolution of the major base metal sulphide minerals, pyrite, chalcopyrite, galena and sphalerite in acidic (chloride) media have been investigated. Minerals were ground in air, then dissolved in air-equilibrated solutions at pH 2.5, while monitoring the redox potential. Solution samples were analysed by ICP-AES and HPLC, and surfaces of residual sulphides analysed using XPS. Dissolution of aerial oxidation products on pyrite particles in the first 15 min apparently led to a sulphur-rich surface, and was followed by slower dissolution of pyrite itself, d

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40

Coghill, Bronwen M., and Allan H. Wilson. "Platinum-group minerals in the Selukwe Subchamber, Great Dyke, Zimbabwe: implications for PGE collection mechanisms and post-formational redistribution." Mineralogical Magazine 57, no. 389 (1993): 613–33. http://dx.doi.org/10.1180/minmag.1993.057.389.06.

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AbstractThis paper presents the results of microprobe investigations of the Platinum-Group Elements (PGE) of the Selukwe Subchamber, Great Dyke, Zimbabwe. The PGE are associated with base metal sulphides in the uppermost pyroxenites of the Ultramafic Sequence of the Great Dyke. The following minerals have been indentified: bismuthotellurides (moncheite, maslovite, michenerite, kotulskite and polarite); arsenides (sperrylite); and sulphides and sulpharsenides (cooperite, laurite, braggite and hollingworthite). Platinum Group Minerals (PGM) occur in three distinct textural environments: (1) at t

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41

Cwalina, Beata, Weronika Dec, Wojciech Simka, Joanna Michalska, and Marzena Jaworska-Kik. "Biofilm Formation on NiTi Surface by Different Strains of Sulphate Reducing Bacteria (Desulfovibrio desulfuricans)." Solid State Phenomena 227 (January 2015): 302–5. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.302.

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Bacteria of Desulfovibrio genus belong to group of widespread sulphate-reducing bacteria (SRB). D. desulfuricans is considered one among many bacterial species involved in microbiologically influenced corrosion (MIC) of metals, mainly of stainless steels and other alloys. SRB can produce gaseous hydrogen sulphide. This gas is released into the environment leading to formation of metal sulphides that significantly influence electrochemical processes and ultimately enhance the corrosion of materials. Biofilms formed by these bacteria are especially harmful for highly alloyed steels and many allo

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42

McGlynn, Shawn E., Isik Kanik, and Michael J. Russell. "Peptide and RNA contributions to iron–sulphur chemical gardens as life's first inorganic compartments, catalysts, capacitors and condensers." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1969 (2012): 3007–22. http://dx.doi.org/10.1098/rsta.2011.0211.

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Hydrothermal chimneys and compartments comprising transition metal sulphides and associated minerals have been proposed as likely locations for the beginnings of life. In laboratory simulations of off-axis alkaline springs, it is shown that the interaction of a simulated alkaline sulphide-bearing submarine vent solution with a primeval anoxic iron-bearing ocean leads to the formation of chimney structures reminiscent of chemical gardens. These chimneys display periodicity in their deposition and exhibit diverse morphologies and mineralogies, affording the possibilities of catalysis and molecul

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43

Thorpe, R. I., M. D. Goodz, I. R. Jonasson, and J. Blenkinsop. "Lead-isotope study of mineralization in the Cobalt district, Ontario." Canadian Journal of Earth Sciences 23, no. 10 (1986): 1568–75. http://dx.doi.org/10.1139/e86-147.

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Twenty-seven lead-isotope analyses for galena specimens from 14 localities in the Cobalt district represent sulphide-rich interflow sedimentary units in the Archean volcanic sequence, mineralized zones, fracture fillings, and local sulphide concentrations in the Cobalt Group (Proterozoic) sedimentary rocks, and vein-filling and breccia-cementing sulphides from within and near silver–arsenide veins. The analyses define a very homogeneous composition, averaging 206Pb/204Pb = 14.732, 2O7Pb/204Pb = 15.114, and 208Pb/204Pb = 34.301, for lead from these different geological settings. This result is

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44

Dovorogwa, Hamlton, and Kevin Harding. "Exploring the Use of Tobacco Waste as a Metal Ion Adsorbent and Substrate for Sulphate-Reducing Bacteria during the Treatment of Acid Mine Drainage." Sustainability 14, no. 21 (2022): 14333. http://dx.doi.org/10.3390/su142114333.

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Treatment of acid mine drainage (AMD) was successfully demonstrated using tobacco waste (dust and stem) as a metal cation adsorbent, pH modifier and carbon source for sulphate-reducing bacteria (SRB). Synthetic and industrial AMD wastewaters were used in batch adsorption and SRB facilitated bioremediation experiments. Up to absorbent loading of 80 g/L, metal removal increased. However, increases above 160 g/L did not offer a proportional increase. At an adsorbent loading of 80 g/L, the highest metal removals of 38, 41, 31 and 43% for iron, nickel, copper and zinc respectively were achieved. Th

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45

Pan, Yuanming, and Michael E. Fleet. "Mineralogy and genesis of calc-silicates associated with Archean volcanogenic massive sulphide deposits at the Manitouwadge mining camp, Ontario." Canadian Journal of Earth Sciences 29, no. 7 (1992): 1375–88. http://dx.doi.org/10.1139/e92-111.

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Skarn-like calc-silicate rocks are reported in spatial association with the Archean Cu–Zn–Ag massive sulphide deposits at the Manitouwadge mining camp, Ontario. Calc-silicates in the footwall of the Willroy mine occur as matrix to breccia fragments of garnetiferous quartzo-feldspathic gneiss and as lenses within garnetiferous quartzo-feldspathic gneiss and are composed of clinopyroxene, garnet, calcic amphiboles, wollastonite, plagioclase, K-feldspar, epidote, quartz, calcite, magnetite, and minor sulphides. Calc-silicates within the main orebody of the Geco mine are characterized by clinopyro

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46

Hobbs, D., and J. Hafner. "Magnetism and magneto-structural effects in transition-metal sulphides." Journal of Physics: Condensed Matter 11, no. 42 (1999): 8197–222. http://dx.doi.org/10.1088/0953-8984/11/42/303.

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47

Kolb, M. A., W. F. Maier, and K. Stöwe. "High-throughput syntheses of nano-scaled mixed metal sulphides." Catalysis Today 159, no. 1 (2011): 64–73. http://dx.doi.org/10.1016/j.cattod.2010.07.010.

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48

Krysin, Mikhail Y., Victor N. Semenov, Tatyana V. Samofalova, and Nadezhda M. Ovechkina. "Mass spectrometry of complex compound of bis-thiourea-lead (II) chloride." Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 25, no. 3 (2023): 462–66. http://dx.doi.org/10.17308/kcmf.2023.25/11268.

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Complex compounds of lead salts and thiourea are of interest due to the possibility of their practical application as precursors in the deposition of metal sulphide films. It is relevant to establish the relationship between the composition and structure of the initial complex compounds and the structure of the sulphides formed as a result of their thermal destruction. This paper presents the results of studying the complex compounds formed in an aqueous solution of lead chloride and thiourea. The structure of the complex compounds was determined by matrix-assisted laser desorption/ionisation

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49

Genge, M. J., and M. M. Grady. "Unequilibrated assemblages of sulphide, metal and oxide in the fusion crusts of the enstatite chondrite meteorites." Mineralogical Magazine 63, no. 4 (1999): 473–88. http://dx.doi.org/10.1180/002646199548655.

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AbstractThe fusion crusts of meteorites form due to heating during atmospheric entry and have mineralogies which are strongly influenced by changes in oxidation state. We have studied the fusion crusts of the most reduced primitive meteorite group, the enstatite chondrites, since they should demonstrate pronounced changes on oxidation. The fusion crusts are dominated by highly unequilibrated assemblages of sulphide, metal and oxide with compositions indicative of progressive oxidation by the reaction with atmospheric oxygen. Troilite becomes depleted in Ti, Cr and Mn, and enriched in Ni with i

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50

Nair, R. S., and M. Suresh Chandran. "Gold Mineralisation in Kappil Prospect, Malappuram District, Kerala." Journal Geological Society of India 43, no. 5 (1994): 573–83. http://dx.doi.org/10.17491/jgsi/1994/430508.

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Abstract A preliminary appraisal of gold mineralisation at Kappil indicates its association with quartz veins traversing the Archaean metamorphic complex comprising biotite-hornblende gneiss, quartz-magnetite granulite (QMG) and amphibolite. Gold mineralisation is confined to the highly sheared and fractured quartz veins/QMG carrying stringers and rich disseminations of pyrrhotite, pyrite, chalcopyrite and arsenopyrite. The visible native gold is distributed along fracture planes in quartzose portion and also as fine disseminations in pyrrhotite, pyrite and arsenopyrite indicating its introduc

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