Article
Multidisciplinary Sciences
Sneha Raghuvanshi, N. V. Chalapathi Rao, Ajit K. Sahoo, Debojit Talukdar
Summary: In this study, sulphide mineralization in a spinel-bearing orthopyroxene hornblendite from the Halaguru area, Eastern Dharwar Craton, southern India was investigated. The sulphides were found in the form of a disseminated assemblage of pyrrhotite-pentlandite-chalcopyrite, which is believed to have formed through the cooling and crystallization of immiscible sulphide globules.
Article
Engineering, Chemical
Song Zou, Shuai Wang, Xin Ma, Jia Yang, Hong Zhong
Summary: Efficient and selective flotation separation of chalcopyrite and pyrite in copper-sulfur ores was achieved by using a newly-synthesized organic compound MDPE as a flotation collector. MDPE showed superior flotation selectivity for chalcopyrite against pyrite at low alkalinity (pH = 8.5), and had a stronger adsorption affinity towards chalcopyrite. The formation of Cu-MDPE complexes with C-S-Cu structure was confirmed to be responsible for the chemical absorption of MDPE on chalcopyrite surfaces.
MINERALS ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Devin L. Schrader, Jemma Davidson, Timothy J. McCoy, Thomas J. Zega, Sara S. Russell, Kenneth J. Domanik, Ashley J. King
Summary: Determining the compositional trends of Fe-sulfides is crucial for understanding the thermodynamic conditions under which they formed and were altered, as well as for maximizing the scientific value of small extraterrestrial samples. The study reveals universal trends between the Fe/S ratio and oxidation levels, with variations in different meteorite groups due to thermal and aqueous alterations. The presence of specific sulfides in chondrites can provide insights into the conditions of formation and alteration, aiding in estimating the oxygen and sulfur fugacities of the samples.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Valeriya Brovchenko, Margarita Merkulova, Jonathan Sittner, Vladimir Shilovskih, Camelia Borca, Thomas Huthwelker, Sergey F. Sluzhenikin, Veerle Cnudde
Summary: This study provides the first evidence for the incorporation of palladium into the structure of pentlandite from Norilsk ores through the use of various analytical techniques. The presence of divalent palladium in the lattice of pentlandite suggests a substitution of nickel by palladium. The combination of methods used in this study demonstrates the potential of these techniques for understanding noble metal incorporation into ore minerals.
AMERICAN MINERALOGIST
(2023)
Article
Chemistry, Multidisciplinary
Peace P. Mkhonto, Phuti E. Ngoepe
Summary: In this study, the crystal structure and surface stability of Cooperite (PtS) were investigated using computational modeling methods. The results revealed the reconstruction mechanisms and stability differences of different surfaces, providing an explanation for its specific crystal morphology.
Article
Engineering, Chemical
Zhixian Xiao, Andre R. Laplante, Yue Hua Tan, James A. Finch
Summary: This paper introduces a methodology to determine the gravity-recoverable platinum group minerals (GRPGMs) in a stream and behavior of platinum group minerals (PGMs) in a ball mill-cyclone circuit. The example study showed that around 80% of platinum (Pt) in the ball mill-cyclone circulating load was GRPGM, with more than 90% of Pt and palladium (Pd) above ca 50 ?m reported to the cyclone underflow. The partition curves showed different behaviors of Pt and Pd in size fractions above and below 212 ?m, which provided opportunities for gravity recovery.
MINERALS ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Sergey Yu. Stepanov, Roman S. Palamarchuk, Anton V. Kutyrev, Vladimir V. Shilovskikh, Sergey V. Petrov
Summary: Three styles of platinum-group element mineralization (chromite-platinum, noble metal, and noble metal-copper) are observed in the Uralian Platinum belt. The different rock types associated with these mineralizations include dunite and chromitite, pyroxenite, and gabbro. The distribution patterns of platinum group elements in dunite and chromitite exhibit three common patterns, while pyroxenite and gabbro are enriched in palladium and gold. The presence of different platinum group minerals and their ratios can be attributed to the variations in magma compositions and controls over PGE concentration.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2023)
Review
Chemistry, Multidisciplinary
Constantinos Varotsis, Charalampos Tselios, Konstantinos A. Yiannakkos, Charalampos Andreou, Marios Papageorgiou, Antonis Nicolaides
Summary: The combination of Fourier transform infrared mu-spectroscopy and Raman microscopy with various laser-induced breakdown spectroscopy approaches has been used to characterize whole ore copper-sulfide minerals. Among the different LIBS methods, the two-color double pulse LIBS shows the highest sensitivity in detecting Fe and Cu metals in the whole ore samples.
Article
Geochemistry & Geophysics
Ling Tan, Thomas Jones, Jianping Xie, Xinxing Liu, Gordon Southam
Summary: It was found in experiments that Fe-and S-oxidizing bacteria enhanced the weathering of the Merensky reef, and the secondary minerals formed through weathering can become targets for platinum group metal exploration. This study reveals the importance of biogeochemical acid weathering in the active release of intact PGM grains.
Review
Geochemistry & Geophysics
Federica Zaccarini, Maria Economou-Eliopoulos, Olga Kiseleva, Giorgio Garuti, Basilios Tsikouras, Evgenii Pushkarev, Arifudin Idrus
Summary: This contribution provides an overview of platinum group elements (PGE) distribution and mineralogy in ophiolitic chromitites, which are unusually enriched in the low melting-point Rh, Pt and Pd (PPGE) compared with most chromite deposits associated with ophiolites. The PPGE-rich chromitites examined in this paper have a PPGE/IPGE ratio equal to or higher than 1 and represent about 7% of the ophiolitic chromitite population.
Article
Geochemistry & Geophysics
Qing-Lin Liang, Xie-Yan Song, Ting-Mao Long, Richard Wirth, Zhi-Hui Dai
Summary: Platinum-group minerals (PGM) play an important role in the enrichment and differentiation of platinum-group elements (PGE) in magmatic sulfide deposits. This study investigates the effect of PGM particles on PGE enrichment in the Yangliuping and Zhengziyanwo deposits, revealing their significance in understanding the formation process of Cu-Ni-PGE deposits and potential for exploring Pt-rich sulfide ores.
Article
Geology
O. N. Filimonova, N. N. Akinfiev, V. D. Abramova, E. V. Kovalchuk, D. A. Chareev, B. R. Tagirov
Summary: This study summarizes the solubility of Pt in pyrite and pyrrhotite and presents a model to describe its solubility at different temperatures and S-2 fugacity. It is found that under conditions typical of ore formation, the solubility of Pt in pyrite and pyrrhotite is several ppm and several hundreds of ppm, respectively.
GEOLOGY OF ORE DEPOSITS
(2022)
Article
Geosciences, Multidisciplinary
Hadi Omrani, Christina Guenter, Gholam Hossein Shamanian, Mehdi Omrani
Summary: Shanderman lamprophyre is a type of rock found in the western part of the Alborz Mountains. It is composed of camptonites with minerals such as olivine, Ti-rich diopside, biotite, and plagioclase. The rocks also contain secondary minerals like analcime-wairakite, serpentines, and prehnite. Geochemical analysis indicates that these rocks were formed through low-grade melting of a metasomatized mantle source.
Article
Geochemistry & Geophysics
Jennifer Smith, Riccardo Graziani, Duane C. Petts, Daniele Regis
Summary: Magmatic sulfide liquids are effective at concentrating metals, and crystallography plays a strong role in controlling metal distributions and sulfide textures. Hexagonal pyrrhotite dominates in the Crystal Lake Intrusion ore and other magmatic sulfide deposits, which has implications for flotation strategies.
Article
Chemistry, Physical
Oleg Dizer, Kirill Karimov, Aleksei Kritskii, Denis Rogozhnikov
Summary: This study investigated the dissolution properties of tennantite, chalcopyrite and sphalerite in nitric acid and studied the effects of temperature, nitric acid concentration, Fe3+ concentration, reaction time and pyrite additive on the conversion of the minerals. The results showed that under optimal conditions, the dissolution rate of the mixture can exceed 90%. The study also analyzed the kinetics of the conversion processes and the roles of Fe(III) and FeS2 as catalysts. The findings are useful in developing a hydrometallurgical process for polymetallic sulfide raw materials treatment.
Article
Geochemistry & Geophysics
Charley J. Duran, Hugo Dube-Loubert, Philippe Page, Sarah-Jane Barnes, Martin Roy, Dany Savard, Ben J. Cave, Jean-Philippe Arguin, Eduardo T. Mansur
JOURNAL OF GEOCHEMICAL EXPLORATION
(2019)
Article
Geochemistry & Geophysics
Sheng-Hong Yang, Wolfgang D. Maier, Belinda Godel, Sarah-Jane Barnes, Eero Hanski, Hugh O'Brien
JOURNAL OF PETROLOGY
(2019)
Article
Geology
Eduardo T. Mansur, Sarah-Jane Barnes, Charley J. Duran
Article
Geochemistry & Geophysics
Sarah-Jane Barnes, Philippe Page, Michael Zientek
MINERALIUM DEPOSITA
(2020)
Article
Geochemistry & Geophysics
Eduardo Teixeira Mansur, Sarah-Jane Barnes, Dany Savard, Peter C. Webb
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2020)
Article
Geochemistry & Geophysics
Eduardo T. Mansur, Sarah-Jane Barnes, Charley J. Duran, Sergey F. Sluzhenikin
MINERALIUM DEPOSITA
(2020)
Article
Geochemistry & Geophysics
Eduardo T. Mansur, Sarah-Jane Barnes
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Geochemistry & Geophysics
Eduardo T. Mansur, Sarah-Jane Barnes
Article
Geochemistry & Geophysics
Charley J. Duran, Sarah-Jane Barnes, Eduardo T. Mansur, Sarah A. S. Dare, L. Paul Bedard, Sergey F. Sluzhenikin
Article
Geochemistry & Geophysics
Eduardo T. Mansur, Sarah-Jane Barnes, Charley J. Duran
Summary: The study compiled trace element concentrations in pyrrhotite, pentlandite, chalcopyrite, and pyrite from world-class Ni-Cu and PGE-dominated deposits to understand their petrogenesis and indicator mineral potential. Significant differences in trace element chemistry of sulfide minerals were found between different types of deposits, suggesting the potential for using these data to discriminate between different rock sources.
MINERALIUM DEPOSITA
(2021)
Article
Mineralogy
Eduardo Mansur, Sarah-Jane Barnes, Cesar F. Ferreira Filho
Summary: The article discusses the formation mechanisms of platinum-group element ore deposits, including those containing chromite or base-metal sulfides and low-S-high platinum-group element deposits. By studying two different styles of platinum-group element deposits in the Luanga Complex in South America, comparisons were made between the two to understand their formation processes.
CANADIAN MINERALOGIST
(2021)
Article
Geochemistry & Geophysics
Sarah-Jane Barnes, Eduardo T. Mansur
Summary: In magmatic nickel-copper-platinum-group element (PGE) deposits, PGEs are found in both solid solution and platinum group minerals. The most common elements that combine with PGEs to form PGMs are Te, As, Bi, Sb, and Sn. However, the concentrations of these elements in magmas and their role in controlling PGEs are still unclear.
Article
Geochemistry & Geophysics
Sarah-Jane Barnes, Eduardo T. Mansur, Philippe Page
Summary: Chromite is an important mineral in major ore deposits of Cr and Pt, and its composition can provide insights into petrogenetic conditions during mantle melting, magma crystallization, and the formation of Pt and Cr ore deposits. However, post-crystallization processes could alter the composition of chromite in mafic rocks, which usually contain very little chromite.
Article
Geosciences, Multidisciplinary
Sarah-Jane Barnes, Eduardo T. Mansur, Wolfgang D. Maier, Stephen A. Prevec
Summary: By examining the minor and trace element contents of chromites from three intrusions and comparing their compositions with those of magmas, the study concludes that the model of magma mixing leading to chromite-only crystallization is not supported. It suggests that some chromites could have formed from contaminated magmas. The chromite compositions vary among different intrusions, and chromites from the western limb of the Bushveld Complex have higher V contents.
CANADIAN JOURNAL OF EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
W. D. Maier, B. Wade, Sarah-Jane Barnes, R. Dutch
Summary: The magmatic ore potential of the Kalka, Gosse Pile, and Ewarara layered intrusions in South Australia were studied. The results show that Ewarara and Gosse Pile have relatively low potential for platinum-group element (PGE) reefs and magmatic Ni-Cu, while Kalka has the potential for discovering PGE reefs.
AUSTRALIAN JOURNAL OF EARTH SCIENCES
(2023)