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Artykuły w czasopismach na temat „Sulphide minerals”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 30 lipca 2024

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1

Mhonde, Ngoni, Mariette Smart, Kirsten Corin, and Nora Schreithofer. "Investigating the Electrochemical Interaction of a Thiol Collector with Chalcopyrite and Galena in the Presence of a Mixed Microbial Community." Minerals 10, no. 6 (June 19, 2020): 553. http://dx.doi.org/10.3390/min10060553.

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High microbial cell counts have been recorded in sewage waters employed as process water in mineral beneficiation plants across the world. The presence of these microbes can negatively impact flotation performance through mineral passivation, although some microbes improve flotation performance as investigated in various bio-flotation studies. The current study aims to understand the electrochemical behaviour of minerals in the presence of a sodium ethyl xanthate (SEX) collector and microbes originating from a sulphide ore processing plant in South Africa. The electrochemical response was corr

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2

Firstova, Anna, Tamara Stepanova, Anna Sukhanova, Georgy Cherkashov, and Irina Poroshina. "Au and Te Minerals in Seafloor Massive Sulphides from Semyenov-2 Hydrothermal Field, Mid-Atlantic Ridge." Minerals 9, no. 5 (May 15, 2019): 294. http://dx.doi.org/10.3390/min9050294.

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The Semyenov-2 hydrothermal field located at 13°31′N of the Mid-Atlantic Ridge (MAR) is associated with an oceanic core complex (OCC) and hosted by peridotites and basalts with minor amounts of gabbro and plagiogranites. Seafloor massive sulphides (SMS) are represented by chimneys with zonality, massive sulphides without zonality and sulphide breccia cemented by opal and aragonite. The mean value of Au (20.6 ppm) and Te (40 ppm) is much higher than average for the MAR SMS deposits (3.2 ppm and 8.0 ppm, respectively). Generally, these high concentrations reflect the presence of a wide diversity

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3

Nghipulile, T., T. E. Moongo, G. Dzinomwa, K. Maweja, B. Mapani, J. Kurasha, and M. Amwaama. "Effect of mineralogy on grindability -A case study of copper ores." Journal of the Southern African Institute of Mining and Metallurgy 123, no. 3 (April 14, 2023): 133–44. http://dx.doi.org/10.17159/2411-9717/1714/2023.

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The effect of mineralogy on the grindability was investigated using three copper ores - two sulphides and one oxide. The dominant copper minerals were identified by optical microscopy and mineral chemistry derived from SEM-EDS analysis. The sample designated sulphide 1 was bornite-rich, sulphide 2 ore was mainly chalcopyrite, and the oxide ore was predominantly malachite and minor azurite. The gangue minerals were identified using semi-qualitative XRD analysis. Sulphide 1 contained more than 80% (w/w) of quartz compared to about 70% in the other two ores. The Bond work indices were 13.8, 21.6,

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4

Belogub, E. V., C. A. Novoselov, B. Spiro, and B. A. Yakovleva. "Mineralogical and S isotopic features of the supergene profile of the Zapadno-Ozernoe massive sulphide and Au-bearing gossan deposit, South Urals." Mineralogical Magazine 67, no. 2 (April 2003): 339–54. http://dx.doi.org/10.1180/0026461036720105.

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The profile of the supergene zone of the Zapadno-Ozernoe massive sulphide Cu-Zn deposit differs from the classic model (Emmons, 1917) in that it includes a prominent dark sooty subzone rich in secondary sulphides. This subzone is situated above residual pyrite sands, which overlie the massive sulphide body and below quartz-baryte leached sands. It contains a diverse mineral assemblage which consists of secondary sulphides such as galena, sphalerite, metacinnabar, Se-bearing pyrite—dhzarkenite series, tiemannite, native Au, native S and native Se, and unidentified sulphosalts of Ag and Hg. The

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5

Wilton, Derek H. C., Benoit M. Saumur, Adrian Gordon, and Marie-Claude Williamson. "Enigmatic massive sulphide mineralization in the High Arctic Large Igneous Province, Nunavut, Canada." Canadian Journal of Earth Sciences 56, no. 7 (July 2019): 790–801. http://dx.doi.org/10.1139/cjes-2018-0156.

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Modern mineral exploration strategies should take into account nontraditional metallogenic models for a given geological environment. Here we document the first detailed study of a massive sulphide showing associated with the High Arctic Large Igneous Province (HALIP) and Sverdrup Basin and in fact, only the second example of mineralization described from Axel Heiberg Island, Queen Elizabeth Islands, Canadian Arctic Archipelago. The Between Lake showing (western Axel Heiberg Island) is a small massive sulphide occurrence within scree/talus below a large ridge of gabbro. It was originally descr

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6

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 (February 1, 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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7

Parnell, John, Sean McMahon, and Adrian Boyce. "Demonstrating deep biosphere activity in the geological record of lake sediments, on Earth and Mars." International Journal of Astrobiology 17, no. 4 (October 2, 2017): 380–85. http://dx.doi.org/10.1017/s1473550417000337.

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AbstractThe investigation of Gale Crater has highlighted the occurrence of lake sediments in the geological record of Mars. Lacustrine basins include a diversity of potential habitats for life. An analogue terrestrial lacustrine basin of Devonian age in Scotland contains sulphide minerals in several settings where subsurface microbial colonization can be envisaged. Sulphur isotope compositions for the sulphides imply that they were precipitated by microbial sulphate reduction. The data suggest that the search for life in martian lacustrine basins should include investigation of potential subsu

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8

Cook, Nigel J., Christopher Halls, and Alan P. Boyle. "Deformation and metamorphism of massive sulphides at Sulitjelma, Norway." Mineralogical Magazine 57, no. 386 (March 1993): 67–81. http://dx.doi.org/10.1180/minmag.1993.057.386.07.

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AbstractThe copper-bearing stratabound pyritic massive sulphide bodies contained in metamorphosed basic eruptives of Ordovician age at Sulitjelma in Nordland County, Norway, form one of the important fields of sulphide mineralisation within the Köli Nappe Complex. The sulphide bodies and their enclosing rocks were subject to successive stages of penetrative deformation and recrystallisation during the cycle of metamorphism and tectonic transport caused by the Scandian Orogeny. Textures within the ores and the immediate envelope of schists show that strain was focused along the mineralised hori

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9

Kim, Heekang, Frank Rosenblum, Ozan Kökkılıç, and Kristian Waters. "Role of Elemental Sulphur in Stage B Self-Heating of Sulphide Minerals, and the Potential Role of Polysulphides." Minerals 13, no. 7 (July 8, 2023): 923. http://dx.doi.org/10.3390/min13070923.

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Sulphide minerals undergo numerous stages of mineral processing to extract the desired metal. When they are exposed to certain environmental conditions, some sulphide minerals can spontaneously heat up, a process called self-heating (SH), which, if left unchecked, can be a major hazard. Self-heating occurs in three distinct temperature stages, termed Stage A (temperature below 100 °C), Stage B (temperature range of 100 °C–350 °C), and Stage C (above 350 °C). Historically, it was understood that elemental sulphur generated in Stage A fuels Stage B reactions; however, the full extent of this beh

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10

Dekov, Vesselin, Elena Mandova, and Vera Kazakova. "Mineralogical genetic groups of fine-psammitic and coarse-aleuritic fractions and some indicators of the submarine hydrothermal activity history (East Pacific Rise, 21°S)." Geologica Balcanica 24, no. 3 (June 30, 1994): 63–75. http://dx.doi.org/10.52321/geolbalc.24.3.63.

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The mineral composition of fine-psammitic (0.10-0.50 mm) and coarse-aleuritic (0.05-0.10 mm) fractions of metalliferous sediments from the East Pacific Rise axial zone (20°30'-22°00' S) is investigated in details by a complex of analytical methods. The mineral composition of the sediments of this region is controlled by the follow factors: remoteness from the landmasses; ocean depth; appurtenance of investigated area to the South arid zone and the axial part of the fast spreading centre with high hydrothermal activity. The sedimentary formation of the investigated spreading segment is polygene

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11

Mhonde, Ngoni, Nora Schreithofer, Kirsten Corin, and Mikko Mäkelä. "Assessing the Combined Effect of Water Temperature and Complex Water Matrices on Xanthate Adsorption Using Multiple Linear Regression." Minerals 10, no. 9 (August 19, 2020): 733. http://dx.doi.org/10.3390/min10090733.

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The combined effect of dissolved ions and water temperature on the adsorption of a xanthate collector on chalcopyrite and pentlandite was investigated using multiple linear regression. Cationic species improved the adsorption of the collector on sulphide minerals through xanthate adsorption activation. Thiosulphate ions generally had a negative effect on collector adsorption, and the interaction of thiosulphate ions and cations effectively reduced collector adsorption on the sulphide minerals. With regards to temperature variation caused by seasonal variation, this study suggests that temperat

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12

Zhao, Li Bing, and Yue Xin Han. "Study on Size Distribution of the Copper and Nickel Ore." Advanced Materials Research 92 (January 2010): 221–27. http://dx.doi.org/10.4028/www.scientific.net/amr.92.221.

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Mineralogy research of the copper and nickel ore from Jinchuan is completed in detail that shows the mineral compositions and their percentage and particle size distributions of the valuable minerals. The main valuable minerals are pyrite, violarite, chalcopyrite which are closely associated with other sulphide minerals. These results provide an important basis for the beneficiation tests.

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13

Mitchell, R. H., and F. Belton. "Niocalite-cuspidine solid solution and manganoan monticellite from natrocarbonatite, Oldoinyo Lengai, Tanzania." Mineralogical Magazine 68, no. 5 (October 2004): 787–99. http://dx.doi.org/10.1180/0026461046850219.

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AbstractLapilli and spatter of natrocarbonatite extruded from the T56B cone of Oldoinyo Lengai (Tanzania) in August 2003 are unusually rich in apatite, silicate, oxide and sulphide minerals. These minerals occur primarily within inclusions of quenched natrocarbonatite in gregoryite and fractures in nyerereite-gregoryite intergrowths. Silicates include members of the sodian cuspidine–niobian cuspidine–niocalite solid-solution series and manganoan monticellite. Oxides are represented by members of the magnesioferrite–jacobsite–magnetite solid-solution series. Sulphides occurring in decreasing or

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14

Jasiński, A. W. "Conditions of formation of the iron-containing minerals, Hällefors silver mines, Bergslagen, Sweden." Mineralogical Magazine 50, no. 355 (March 1986): 101–10. http://dx.doi.org/10.1180/minmag.1986.050.355.13.

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AbstractThe Hällefors silver deposit is regarded as a volcanogenic-exhalative iron ore deposit with dispersed amounts of Ag-Pb-Zn (±Cu) which has undergone secondary remobilization leading to the concentration of sulphides and sulphosalts. Based on data from the iron oxides and sulphides, the sulphide-sulphosalt mineralization is believed to have been formed in two stages. The first is characterized by the ranges 573-473 K and 2.25–1.5 kbar, higher gradient of changes of log aS2 with temperature and mostly sulphide precipitation; the second by the ranges 473–443 K, lower gradient of changes of

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15

HAYES, R. A., D. M. PRICE, J. RALSTON, and R. W. SMITH. "Collectorless Flotation of Sulphide Minerals." Mineral Processing and Extractive Metallurgy Review 2, no. 3 (March 1987): 203–34. http://dx.doi.org/10.1080/08827508708952606.

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16

Han, Kenneth N. "Flotation of sulphide minerals 1990." International Journal of Mineral Processing 36, no. 3-4 (October 1992): 295–96. http://dx.doi.org/10.1016/0301-7516(92)90051-w.

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17

Mielczarski, Jerzy. "Flotation of sulphide minerals 1990." International Journal of Mineral Processing 38, no. 1-2 (May 1993): 154–56. http://dx.doi.org/10.1016/0301-7516(93)90072-i.

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18

Cox, S. F. "Flow mechanisms in sulphide minerals." Ore Geology Reviews 2, no. 1-3 (May 1987): 133–71. http://dx.doi.org/10.1016/0169-1368(87)90026-6.

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19

Dunn, J. G. "The oxidation of sulphide minerals." Thermochimica Acta 300, no. 1-2 (October 1997): 127–39. http://dx.doi.org/10.1016/s0040-6031(96)03132-2.

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20

Vikentyev, Ilya, Olga Vikent’eva, Eugenia Tyukova, Maximilian Nikolsky, Julia Ivanova, Nina Sidorova, Dmitry Tonkacheev, et al. "Noble Metal Speciations in Hydrothermal Sulphides." Minerals 11, no. 5 (May 3, 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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21

Hutabarat, Imelda. "Thermal analysis of Indonesian copper sulphide." IOP Conference Series: Earth and Environmental Science 882, no. 1 (November 1, 2021): 012009. http://dx.doi.org/10.1088/1755-1315/882/1/012009.

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Abstract The development of extracting hydrometallurgical process for copper sulphide mineral becomes one of the promising fields, not only for the copper production but also for the production of metal by-products. The advantage of the thermal analysis is to get the phase form of the minerals on a certain temperature. With this result, the chosen metal can be selectively extracted. The goal of this study is to understand the thermal reaction of the copper sulphide as the basic data to develop a process flowsheet of extracting copper and other important metals from the copper concentrates by u

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22

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 (April 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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23

Tafirenyika, Tanaka P., Cyril T. O’Connor, and Kirsten C. Corin. "Investigating the Influence of the Electrochemical Environment on the Flotation of Bornite and Chalcocite." Minerals 12, no. 12 (November 28, 2022): 1527. http://dx.doi.org/10.3390/min12121527.

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Beneficiation of sulphide ores by flotation is ascribed to the natural electrochemical activity associated with sulphide minerals. Flotation is an electrochemical process comprising many interdependent conditions that are difficult to decouple in terms of controlling flotation performance. The extent of electrochemical activity is mineral dependent and can be measured against a reference cell to differentiate between minerals. This difference in activity is known as the rest potential. The rest potential can be exploited to preferentially float one mineral over another as these properties resu

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24

Sokić, Miroslav D., Vladislav Matković, Jovica Stojanović, Branislav Marković, and Vaso Manojlović. "Kinetics of barite reduction from refractory barite-sulphide ore." Metallurgical and Materials Engineering 22, no. 4 (December 31, 2016): 261–68. http://dx.doi.org/10.30544/237.

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Refractory sulphide–barite ore was reduced with carbon in order to release lead, zinc, and copper sulphide from barite-pyrite base. Mineralogical investigations showed that due to the complex structural-textural relationships of lead, copper and zinc minerals with gangue minerals, it is not possible to enrich the ore using the conventional methods of mineral processing. The influence of temperature and time was studied to optimize the conditions, and to determine the kinetics of the barite reduction. The maximum removal of barite from ore was 96.7% at 900oC after 180 min. Chemically controlled

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25

Rao, S. R., and J. A. Finch. "Galvanic Interaction Studies on Sulphide Minerals." Canadian Metallurgical Quarterly 27, no. 4 (October 1988): 253–59. http://dx.doi.org/10.1179/cmq.1988.27.4.253.

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Furukawa, Y. "Replacement Mechanisms Among Iron Sulphide Minerals." Mineralogical Magazine 58A, no. 1 (1994): 299–300. http://dx.doi.org/10.1180/minmag.1994.58a.1.157.

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Baláž, P., A. Aláčová, M. Achimovičová, J. Ficeriová, and E. Godočíková. "Mechanochemistry in hydrometallurgy of sulphide minerals." Hydrometallurgy 77, no. 1-2 (April 2005): 9–17. http://dx.doi.org/10.1016/j.hydromet.2004.09.009.

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SOROKA, Elena Industrovna, Lyubov’ Vladimirovna LEONOVA, and Mikhail Egorovich PRITCHIN. "Brockite in wallrock metasomatites of the Safyanovskoe copper-sulphide deposit (Middle Urals)." NEWS of the Ural State Mining University 59, no. 3 (September 15, 2020): 35–40. http://dx.doi.org/10.21440/2307-2091-2020-3-35-40.

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The relevance of the work is due to the need to study ore copper-sulphide deposits in the Urals. Purpose of the work: description of accessory brockite in metasomatites of the Safyanovskoe copper-sulphide deposit. Research methodology: the chemical composition of minerals was determined using the Jeol JSM-6390LV scanning electron microscope with an INCA Energy 450 X-Max 80 energy dispersive attachment from Oxford Instruments (Institute of Geology and Geochemistry of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg). Results and conclusions. For the first time for the Safyanovsk

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Gilbert, S. E., L. V. Danyushevsky, K. Goemann, and D. Death. "Fractionation of sulphur relative to iron during laser ablation-ICP-MS analyses of sulphide minerals: implications for quantification." J. Anal. At. Spectrom. 29, no. 6 (2014): 1024–33. http://dx.doi.org/10.1039/c4ja00012a.

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In this study we investigate the effect that the mineral composition has on the quantification of sulphur by Laser Ablation ICP-MS (LA-ICP-MS) between a range of sulphide minerals: pyrite, pyrrhotite, bornite, chalcopyrite, sphalerite, pentlandite and tetrahedrite.

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Raiswell, R., L. G. Benning, L. Davidson, and M. Tranter. "Nanoparticulate bioavailable iron minerals in icebergs and glaciers." Mineralogical Magazine 72, no. 1 (February 2008): 345–48. http://dx.doi.org/10.1180/minmag.2008.072.1.345.

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AbstractIce-hosted sediments in glaciers and icebergs from Antarctica and Svalbard contain authigenic nanoparticulates of schwertmannite, ferrihydrite and goethite that formed during sulphide oxidation. These phases indicate the existence of subglacial biogeochemical hotspots containing fluids of low pH (2—4), rich in dissolved Fe(III) and sulphate. Nanophase Fe is partially bioavailable and potentially important to global biogeochemical cycles, since the flux delivered by icebergs to the Southern Ocean is comparable to the flux of soluble, bioavailable Fe from aeolian dust.

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Khalid, Muhammad, Faïçal Larachi, and Alain Adnot. "Impact of silver sulphide on gold cyanidation with conductive sulphide minerals." Canadian Journal of Chemical Engineering 95, no. 10 (May 4, 2017): 1875–84. http://dx.doi.org/10.1002/cjce.22870.

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Artemiev, Grigory, and Alexey Safonov. "Authigenic Mineral Formation in Aquifers near the Uranium Sludge Storage Facility of Chepetsky Mechanical Plant during the Formation of a Biogeochemical Barrier in a Laboratory and Field Experiment." Minerals 13, no. 10 (October 12, 2023): 1319. http://dx.doi.org/10.3390/min13101319.

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In this work, authigenic microbial mineral formation in groundwater near the uranium sludge storage at SC Chepetsky Mechanical Plant (ChMP) (Glazov, Russia) was analysed in field and laboratory experiments using thermodynamic modelling when the microbial community was activated by a mixture of acetate, glucose and whey. It was found that the mineral basis of the barrier consisted of aggregated soil particles with freshly deposited phases of carbonate and sulphide minerals of different degrees of crystallinity. An important factor in the formation of calcium phases is microbial denitrification,

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Ball, T. K., J. R. Davies, R. A. Waters, and J. A. Zalasiewicz. "Geochemical discrimination of Silurian mudstones according to depositional process and provenance within the Southern Welsh Basin." Geological Magazine 129, no. 5 (September 1992): 567–72. http://dx.doi.org/10.1017/s0016756800021725.

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AbstractA preliminary geochemical investigation of Silurian (Llandovery) basinal mudstones (turbidites and hemipelagites) from the Southern Welsh Basin is described. Turbidite mudstones show higher concentrations of Fe2O3, MgO, TiO2, MnO, LOI, Zn and Zr than laminated hemipelagites. This is consistent with the observed higher concentrations of chlorite and Ti-bearing minerals in turbidite mudstones. Laminated hemipelagites show higher values of REEs (Ce and La), concentrated within authigenic monazites, and Ni, As, Cu and Pb within sulphide minerals (pyrite and galena) reflecting the influence

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Tijsseling, Laurens T., Quentin Dehaine, Gavyn K. Rollinson, and Hylke J. Glass. "Mineralogical Prediction of Flotation Performance for a Sediment-Hosted Copper–Cobalt Sulphide Ore." Minerals 10, no. 5 (May 23, 2020): 474. http://dx.doi.org/10.3390/min10050474.

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As part of a study investigating the influence of mineralogical variability in a sediment hosted copper–cobalt deposit in the Democratic Republic of Congo on flotation performance, the flotation of nine sulphide ore samples was investigated through laboratory batch kinetics tests and quantitative mineral analyses. Using a range of ore samples from the same deposit the influence of mineralogy on flotation performance was studied. Characterisation of the samples through QEMSCAN showed that bornite, chalcopyrite, chalcocite and carrollite are the main copper-bearing sulphide minerals while carrol

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Frater, Kenneth Maxwell. "Mineralization at the Golden Grove Cu – Zn deposit, Western Australia. II: Deformation textures of the opaque minerals." Canadian Journal of Earth Sciences 22, no. 1 (January 1, 1985): 15–26. http://dx.doi.org/10.1139/e85-002.

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Studies of the sulphide–magnetite fabric at Golden Grove. Western Australia, metamorphosed under conditions of lower to middle greenschist facies, indicate that pyrite and magnetite deformed in a brittle manner, whereas pyrrhotite, sphalerite, chalcopyrite, and galena deformed as ductile sulphides. In the accompanying silicate assemblage, pressure-solution deformation has been a significant deformation mechanism. An optical-microscope study of etched sphalerite reveals a wide range of microstructures indicative of ductile deformation, including lattice dislocations, subgrains and subboundaries

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Watling, H. R. "The bioleaching of sulphide minerals with emphasis on copper sulphides — A review." Hydrometallurgy 84, no. 1-2 (October 2006): 81–108. http://dx.doi.org/10.1016/j.hydromet.2006.05.001.

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Jaggar, S. R., and D. W. Emerson. "The effects of polarizable mineral type, amount, mix and grainsize in complex resistivity studies of synthetic mineralized sands." Exploration Geophysics 20, no. 2 (1989): 111. http://dx.doi.org/10.1071/eg989111.

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Controlled laboratory experiments were run using a computer controlled Solartron (1250A) Frequency Response Analyser coupled to very high impedance amplifiers at low current densities (2 � 10?2 Am?2) to obtain complex resistivity spectra in the 10 mHz to 10 kHz range from leached quartz sand (37?63 �m diam.) and granulated sulphide (63?1000 �m diam.) mixtures in four electrode cells saturated with brackish (80 Om, 20�C) and fresh 100 Om) chloride electrolyte. The sulphide particles and the silica background medium grains were angular in shape; the ratio of sulphide to sand size varied from 2:1

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Shen, Shuai Ping, Zhi Tao Yuan, Li Xia Li, and Shuo Zhu. "Flotation Behavior of Jinchuan High Grade Copper-Nickel Sulphide with the Action of Different Regulators." Advanced Materials Research 826 (November 2013): 61–67. http://dx.doi.org/10.4028/www.scientific.net/amr.826.61.

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The useful minerals of Jinchuan high-grade copper and nickel suphfide ores were mainly nickel and copper, whose grade were respectively 1.42% and 1.01%. The content of MgO and SiO2, main gangue components, reached 57.89%. The key to improve the separation indexes of flotation concentrate was to inhibit the gangue minerals effectively, therefore, the effects of different kinds of regulators on Jinchuan high grade copper-nickel ores by flotation were studied. Considering the grade and recovery of concentrate comprehensively, the optimal regulator of mineral flotation was determined to be the com

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Wang, Yan, Zhongwei Wu, Xiaoming Sun, Xiguang Deng, Yao Guan, Li Xu, Yi Huang, and Kaijun Cao. "He–Ar–S Isotopic Compositions of Polymetallic Sulphides from Hydrothermal Vent Fields along the Ultraslow-Spreading Southwest Indian Ridge and Their Geological Implications." Minerals 8, no. 11 (November 7, 2018): 512. http://dx.doi.org/10.3390/min8110512.

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Noble gases have become a powerful tool to constrain the origin and evolution of ore-forming fluids in seafloor hydrothermal systems. The aim of this study was to apply these tracers to understand the genesis of newly discovered polymetallic sulphide deposits along the ultraslow-spreading Southwest Indian Ridge (SWIR). The helium, argon, and sulphur isotope compositions of metal sulphide minerals were measured for a number of active/inactive vent fields in the Indian Ocean. The helium concentrations and isotopic ratios in these ore samples are variable (4He: 0.09–2.42 × 10−8 cm3STP∙g−1; 3He: 0

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Koomson, Bennetta, Shadrack Fosu, Blestmond Afrifa Brako, Elias Kwasi Asiam, and Ernest K. Yanful. "ASSESSING THE ACID MINE DRAINAGE POTENTIAL OF A STOCKPILED GOLD BEARING SULPHIDE ORE." Earth Science Malaysia 5, no. 1 (December 29, 2020): 58–64. http://dx.doi.org/10.26480/esmy.01.2021.58.64.

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This work seeks to assess the acid mine drainage (AMD) potential of stockpiled sulphidic gold bearing ore that was left untreated for a period of four (4) years. The mineralogical composition of the stockpiled sulphidic gold ore was determined using X-Ray Diffractometry (XRD) and Reflected Light Microscope. The AMD potential and kinetic studies on the ore sample were determined using Acid Base Accounting (ABA) and Humidity Cell (ASTMD 5744). The XRD and microscope analyses showed that the gold ore contain arsenopyrite and pyrite as the major sulphide minerals. The ABA confirmed that the gold s

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Africa, C. J., Robert P. van Hille, and Susan T. L. Harrison. "Investigation and Visualisation of Microbial Attachment Trends to Sulphide Minerals in a Bioleach Environment." Advanced Materials Research 71-73 (May 2009): 345–48. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.345.

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Two novel experimental approaches have been developed to investigate the attachment of microorganisms to sulphide minerals as a function of the mineral and microbial phase in a joint project with BHP Billiton, conceptualised in 2005 and initiated in 2006. In the first approach, selective attachment of pure cultures to minerals was studied in the “particle coated column reactor” using A. ferrooxidans and L. ferriphilum. The saturated reactor containing glass beads coated with fine mineral concentrates provided a quantifiable surface area of mineral concentrate and maintained good fluid flow. Re

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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 (October 26, 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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Duckworth, Rowena C., and David Rickard. "Sulphide mylonites from the Renström VMS deposit, Northern Sweden." Mineralogical Magazine 57, no. 386 (March 1993): 83–91. http://dx.doi.org/10.1180/minmag.1993.057.386.08.

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AbstractSulphide mylonites are fine-grained massive sulphides which have deformed in a plastic manner. In the Renström Zn-Pb-Cu-Ag-Au VMS deposit, one of several operating mines in the Early Proterozoic Skellefte District in Northern Sweden, shear-zone metamorphism has resulted in the development of mylonitic fabrics within the sulphides. The massive sulphide ore is hosted in a shallow submarine to subaerial volcano-sedimentary sequence which has been variably metamorphosed and deformed. Initially, the sequence underwent burial metamorphism which was followed by an amphibolite grade regional m

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Tribovillard, Nicolas, Olivier Averbuch, Anne Bialkowski, and Jean-François Deconinck. "Early diagenesis of marine organic-matter and magnetic properties of sedimentary rocks: the role of iron limitation and organic-matter source organisms." Bulletin de la Société Géologique de France 173, no. 4 (July 1, 2002): 295–306. http://dx.doi.org/10.2113/173.4.295.

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Abstract The magnetic parameters of sedimentary rocks can record accurately tectonic and climatic influences upon sedimentary processes, when they are not altered during diagenesis. This paper is focused on the possible alteration of the primary magnetic-susceptibility signal during early diagenesis of marine organic matter (OM). In the late Kimmeridgian-Tithonian Argiles de Châtillon Formation (Fm.) of the Boulonnais area (northern France – lateral time equivalent of the distal organic-rich sediments of the Kimmeridge Clay Fm. of Dorset), the organic content is dominated by amorphous OM (AOM

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Sokic, Miroslav, Jovica Stojanovic, Branislav Markovic, Mladen Bugarcic, Nada Strbac, Zeljko Kamberovic, and Vaso Manojlovic. "Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution." Chemical Industry 71, no. 6 (2017): 461–69. http://dx.doi.org/10.2298/hemind161130006s.

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In this paper, the influence of structural and textural characteristics of sulfide minerals on their leaching from a polymetallic concentrate by sulfuric acid and sodium nitrate solution is presented. The starting material was Pb?Zn?Cu sulphide polymetallic concentrate enriched during the flotation of a polymetallic ore in the "Rudnik" flotation plant (Rudnik ? Serbia). Leaching experiments were carried out in a closed glass reactor, which provides stable hermetic conditions and allows heating at constant temperature. Chemical, XRD, qualitative and quantitative microscopic and SEM/EDX analyses

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Harris, D. L., and B. G. Lottermoser. "Phosphate stabilization of polyminerallic mine wastes." Mineralogical Magazine 70, no. 1 (February 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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Laptash, N. M., S. A. Polyshchuk, T. A. Kalacheva, and E. I. Melnichenko. "Fluorination of sulphide minerals with ammonium bifluoride." Journal of Fluorine Chemistry 58, no. 2-3 (August 1992): 330. http://dx.doi.org/10.1016/s0022-1139(00)80795-2.

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Javadi Nooshabadi, Alireza, and Kota Hanumantha Rao. "Formation of hydrogen peroxide by sulphide minerals." Hydrometallurgy 141 (January 2014): 82–88. http://dx.doi.org/10.1016/j.hydromet.2013.10.011.

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Prestidge, C. A., and J. Ralston. "Contact angle studies of particulate sulphide minerals." Minerals Engineering 9, no. 1 (January 1996): 85–102. http://dx.doi.org/10.1016/0892-6875(95)00133-6.

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Tabatabaei, Reyhaneh H., D. R. Nagaraj, Sergio M. S. M. Vianna, Timothy J. Napier-Munn, and Barun Gorain. "The effect of non-sulphide gangue minerals on the flotation of sulphide minerals from Carlin-type gold ores." Minerals Engineering 60 (June 2014): 26–32. http://dx.doi.org/10.1016/j.mineng.2014.02.004.

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