Relevant bibliographies by topics / Cassiterite

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Academic literature on the topic 'Cassiterite'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Cassiterite"

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Liu, Shiyu, Yuping Liu, Lin Ye, Chen Wei, Yi Cai, and Weihong Chen. "Genesis of Dulong Sn-Zn-In Polymetallic Deposit in Yunnan Province, South China: Insights from Cassiterite U-Pb Ages and Trace Element Compositions." Minerals 11, no. 2 (February 13, 2021): 199. http://dx.doi.org/10.3390/min11020199.

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The Dulong Sn-Zn-In polymetallic deposit in the Yunnan province, SW China, hosts a reserve of 5.0 Mt Zn, 0.4 Mt Sn, and 7 Kt In. It is one of the most important polymetallic tin ore districts in China. Granites at Dulong mining area include mainly the Laojunshan granite (third phase), which occurs as quartz porphyry or granite porphyry dikes in the Southern edge of the Laojunshan intrusive complex. Granites of phases one and two are intersected at drill holes at depth. There are three types of cassiterite mineralization developed in the deposit: cassiterite-magnetite ± sulfide ore (Cst I), cassiterite-sulfide ore (Cst II) within the proximal skarn in contact with the concealed granite (granites of phases one to two and three), and cassiterite-quartz vein ore (Cst III) near porphyritic granite. Field geology and petrographic studies indicate that acid neutralising muscovitization and pyroxene reactions were part of mechanisms for Sn precipitation resulting from fluid-rock interaction. In situ U–Pb dating of cassiterite samples from the ore stages of cassiterite-sulfide (Cst II) and Cassiterite-quartz vein (Cst III) yielded Tera-Wasserburg U–Pb lower intercept ages of 88.5 ± 2.1 Ma and 82.1 ± 6.3 Ma, respectively. The two mineralization ages are consistent with the emplacement age of the Laojunshan granite (75.9–92.9 Ma) within error, suggesting a close temporal link between Sn-Zn(-In) mineralization and granitic magmatism. LA-ICPMS trace element study of cassiterite indicates that tetravalent elements (such as Zr, Hf, Ti, U, W) are incorporated in cassiterite by direct substitution, and the trivalent element (Fe) is replaced by coupled substitution. CL image shows that the fluorescence signal of Cst I–II is greater than that of Cst III, which is caused by differences in contents of activating luminescence elements (Al, Ti, W, etc.) and quenching luminescence element (Fe). Elevated W and Fe but lowered Zr, Hf, Nb, and Ta concentrations of the three type cassiterites from the Dulong Sn-Zn-In polymetallic deposit are distinctly different from those of cassiterites in VMS/SEDEX tin deposits, but similar to those from granite-related tin deposits. From cassiterite-magnetite ± sulfide (Cst I), cassiterite-sulfide ore (Cst II), to cassiterite-quartz vein ore-stage (Cst III), high field strength elements (HFSEs: Zr, Nb, Ta, Hf) decrease. This fact combined with cassiterite crystallization ages, indicates that Cst I–II mainly related to concealed granite (Laojunshan granites of phases one and two) while Cst III is mainly related to porphyritic granite (Laojunshan granites of phase three).
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Belov, S. V. "About the monograph “Collection and jewelry cassiterite”." Proceedings of higher educational establishments. Geology and Exploration, no. 3 (February 28, 2021): 92–96. http://dx.doi.org/10.32454/0016-7762-2020-63-3-92-96.

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Specialists of the Sergo Ordzhonikidze Russian State University for Geological Prospecting (MGRI), which had been training gemologists for many years, conducted an interesting and substantial study devoted to a non-traditional use of cassiterite, a mineral known to man for millennia. The monograph2 under review discusses various aspects of the use of cassiterite, as well as its accompanying minerals, for producing jewelry, collection and ornamental materials. Given the increasing popularity of natural minerals in recent decades, there is a growth of interest among collectors and manufacturers in non-traditional semi-precious stone raw materials and their use in the jewelry industry. The world trade in this area is significant and continues to demonstrate an increasing trend. In this regard, the work of D.A. Petrochenkov devoted to jewelry and ornamental cassiterites seems to be highly relevant. For the first time in world practice, the monograph comprehensively covers questions concerning cassiterite and its application, thus contributing to popularization of cassiterite jewelry and craftsmanship and laying the foundation for a new direction in the semi-precious stone industry. The author of the monograph critically reviewed the results of previous studies on the mineral and chemical composition of cassiterite and added an extensive set of his own analytical methods. The gemological and technological characteristics of cassiterite minerals were given, along with recommendations on their rational search, use and quality improvement. In term of ecological parameters, it was shown that the content of carcinogenic and radioactive elements in jewelry cassiterites does not exceed the background values. The market conditions were described, and recommendations on the organization of mining and geological work in this sphere were presented.
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He, Xiaohu, Congfa Bao, Yongyan Lu, Nicole Leonard, Zheng Liu, and Shucheng Tan. "LA–ICP–MS U–Pb Dating, Elemental Mapping and In Situ Trace Element Analyses of Cassiterites from the Gejiu Tin Polymetallic Deposit, SW China: Constraints on the Timing of Mineralization and Precipitation Environment." Minerals 12, no. 3 (February 28, 2022): 313. http://dx.doi.org/10.3390/min12030313.

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As a major constituent in magmatic–hydrothermal ore deposits, cassiterites, with moderate amounts of U and low Pb, can be dated with U–Pb geochronology. The tetragonal lattice structure makes cassiterites capable of incorporating dozens of elements within its crystal lattice (e.g., Fe, Ti, W, Zr, Hf, Ta, Nb, Mn, Sc, V, and Sb). Variations of these elements record information of potential elemental substitution mechanisms and precipitation environments of cassiterites. In this study, we collected cassiterite grains from four different ore styles of the Gejiu tin polymetallic deposit to perform LA–ICP–MS U–Pb dating, multiple element mapping, and in situ trace element analysis on these cassiterites. Systematic U–Pb dating yielded Tera–Wasserburg lower intercepted ages at around 85 Ma, coinciding with zircon U–Pb ages of regional Late Yanshanian granitoids, within their respective analytical uncertainties. Such age coincidence, combined with the spatial association, suggests that tin mineralization may be genetically related to the Late Cretaceous granitic magmatism. Multielemental mapping shows that the distribution of Nb, Ta, and Ti in the cassiterite grains correlates well with the regular oscillatory zoning patterns in cathodoluminescence (CL) images. The relatively high Sb, Fe, W, Ga, and U concentrations control the dark luminescing domains in these cassiterite grains. The systematic variations in chemical compositions suggest that trace elements such as Sc, V, Fe, and Ga incorporate in cassiterites via coupled substitutions of Sc3+ + V5+ ↔ 2 (Sn, Ti)4+, Fe3+ + Ga5+ ↔ 2 (Sn, Ti)4+ and Fe3+ + OH– ↔ Sn4+ + O2– or Fe3+ + H+ ↔ Sn4+. The covariation of redox sensitive elements such as W, U, Fe, and Sb indicates that the ”tin-granite” type of cassiterites were formed under an oxidized state whereas cassiterites from skarn, massive sulfide, and oxidized ore styles were precipitated in a reducing environment.
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Zhao, Yuehua, Shouyu Chen, Yuqiang Huang, Jiangnan Zhao, Xiang Tong, and Xingshou Chen. "U-Pb Ages, O Isotope Compositions, Raman Spectrum, and Geochemistry of Cassiterites from the Xi’ao Copper-Tin Polymetallic Deposit in Gejiu District, Yunnan Province." Minerals 9, no. 4 (March 31, 2019): 212. http://dx.doi.org/10.3390/min9040212.

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: The Xi’ao Cu-Sn polymetallic deposit is located in the inner alteration zone of the Laoka granite. The ore bodies extend to 400 m in the granite rock and primarily occur with fluorite and potassic alterations. Two cassiterite samples of altered rock-type ore and one tourmaline vein-type ore in the Xi’ao Cu-Sn polymetallic deposit yielded U-Pb ages of 83.3 ± 2.1 Ma, 84.9 ± 1.7 Ma, and 84.0 ± 5.6 Ma, respectively. The Raman spectrum peak values of A1g were shifted to a lower frequency, possibly due to the substitution of Sn with Nb, Ta, Fe, and Mn. Measured δ18O values of cassiterite samples and calculated δ18OH2O values for the ore-forming fluid indicate that the latter was mostly derived from magma. The high Fe and Mn abundances for cassiterite are consistent with those of hydrothermal origin. The Nb, Ta, and Ti contents indicate that cassiterites in the Xi’ao deposit likely formed in a metallogenic environment that was largely affected by granitic magmatism. Therefore, we conclude that the Xi’ao deposit is a magmatic hydrothermal deposit.
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Chen, Li-Li, Pei Ni, Bao-Zhang Dai, Wen-Sheng Li, Zhe Chi, and Jun-Yi Pan. "The Genetic Association between Quartz Vein- and Greisen-Type Mineralization at the Maoping W–Sn Deposit, Southern Jiangxi, China: Insights from Zircon and Cassiterite U–Pb Ages and Cassiterite Trace Element Composition." Minerals 9, no. 7 (July 4, 2019): 411. http://dx.doi.org/10.3390/min9070411.

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The large-scale Maoping W–Sn deposit in the Gannan metallogenic belt of the eastern Nanling Range, South China, spatially associated with the Maoping granite pluton, hosts total ore reserves of 103,000 t WO3 and 50,000 t Sn. Two different types of mineralization developed in this deposit: Upper quartz vein-type mineralization, mostly within the Cambrian metamorphosed sandstone and slate, and underneath greisen-type mineralization within the Maoping granite. Cassiterites from both types of mineralization coexist with wolframite. Here we report for the first time in situ U–Pb data on cassiterite and zircon of the Maoping deposit obtained by LA-ICP-MS. Cassiterite from quartz vein and greisen yielded weighted average 206Pb/238U ages of 156.8 ± 1.5 Ma and 156.9 ± 1.4 Ma, respectively, which indicates that the two types of mineralization formed roughly at the same time. In addition, the two mineralization ages are consistent with the emplacement age of the Maoping granite (159.0 ± 1.5 Ma) within error, suggesting a close temporal and genetic link between W–Sn mineralization and granitic magmatism. The two types of mineralization formed at the same magmatic-hydrothermal event. Cassiterite from both types of mineralization shows high Fe, Ta, and Zr contents with a low Zr/Hf ratio, suggesting that the ore-forming fluid should be derived from the highly differentiated Maoping granite pluton. Cassiterite in greisen has higher contents of Nb and Ta but a lower concentration of Ti compared with that in quartz vein, indicating that the formation temperature of greisen-type mineralization is little higher than that of quartz-vein-type mineralization.
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Murciego, A., A. Garcla Sanchez, Y. Dusausoy, J. M. Martin Pozas, and R. Ruck. "Geochemistry and EPR of cassiterites from the Iberian Hercynian Massif." Mineralogical Magazine 61, no. 406 (June 1997): 357–65. http://dx.doi.org/10.1180/minmag.1997.061.406.03.

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AbstractThis paper is based on microprobe analysis (Ta, Nb, Fe, Mn, Ti, W, Sn) and Fe3+EPR spectra of cassiterite samples from 14 tin deposits from the Iberian Hercynian Massif. The interpretation of microprobe data, atomic ratios (Fe+Mn)/(Nb+Ta), and Fe3+EPR spectra reveal that the coupled substitution: 3Sn4+= (Fe,Mn)2++ 2(Nb,Ta)5+is dominant in cassiterites from pegmatites, and high-temperature quartz veins and in the dark zones of cassiterites.The mechanisms:2Sn4+= Fe3++ (Nb,Ta)5+andSn4++ O2−= Fe3++ OH−are dominant in those from medium-low temperature quartz veins and in the light zones of cassiterites.
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Liu, Si Qing, Min Zhang, Wan Ping Wang, and Bao Xu Song. "A Review on Reagents and Processes of Fine-Grained Cassiterite Flotation in Mining Engineering." Advanced Materials Research 577 (October 2012): 151–54. http://dx.doi.org/10.4028/www.scientific.net/amr.577.151.

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Tin resources are abundant and complicated in China. Most of tin resources come from cassiterite. Normally the main beneficiation method of coarse cassiterite ore is gravity separation. However, as for the fine-grained cassiterite, flotation and joint processing techniques are generally selected to improve the low recovery from gravity separation. This paper outlines different kinds of cassiterite, collectors and depressants for cassiterite flotation and their using conditions and some reinforced methods in beneficiation of the fine-grained cassiterite for reference in mining industry.
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Wu, Shipeng, Zhongming Wang, Fang Liu, Chen Zhao, and Yangge Zhu. "Selective Separation Behavior and Study on the Interaction Mechanism of 2-Hydroxy-3-Naphthylmethyl Hydroxamic Acid and Cassiterite." Minerals 14, no. 1 (December 28, 2023): 29. http://dx.doi.org/10.3390/min14010029.

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In this study, the performance of 2-hydroxy-3-naphthylmethyl hydroxamic acid (NHA) in cassiterite flotation was investigated. The aim was to understand the mechanism of action of NHA for the first time. The effect of NHA as a collector in the flotation separation of cassiterite, calcite, and quartz was investigated via microbubble flotation experiments. The experimental results showed that the maximum recovery of cassiterite in the presence of NHA was 91.76%. This was attributed to the selective adsorption of NHA on the cassiterite surface. NHA showed a stronger collection performance for cassiterite than calcite and quartz. Therefore, the mechanism of NHA-cassiterite interaction was investigated using zeta potential, the logarithmic solubility plot (LSD), Fourier Transform Infrared (FT-IR), X-ray Photoelectron Spectroscopy (XPS), and Scanning Electron Microscope (SEM) analyses. This study introduces a new adsorption process and mechanism for the NHA-based adsorption of cassiterite. The results show that, under neutral conditions, the solute components of cassiterite surface lattice ions mainly exist in the form of Sn–OH complexes. Chemisorption occurs between cassiterite and NHA which is adsorbed onto the cassiterite surfaces through interaction with O sites, rather than Sn sites as is traditionally expected. Further, the hydroxyl and hydroxyl groups of NHA are chemically coordinated with Sn–OH on the surface of cassiterite to form a six-membered chelate ring. This proposed mechanism can be extended to most systems in which metal ions interact with hydroxamic acids bearing hydroxyl groups. This contributes to a better understanding of the activation mechanism of hydroxamic acid collectors in cassiterite flotation.
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Zhu, Yi Min, Yan Ping Yang, Wen Dan Wang, Yan Feng Li, Duo Zhen Ren, and Zhi Dong Tang. "Application of a Novel Collector DXS in Cassiterite Flotation." Advanced Materials Research 826 (November 2013): 14–19. http://dx.doi.org/10.4028/www.scientific.net/amr.826.14.

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A comparative study on the collecting effect to cassiterite was studied using a new carboxylic acid modified collector DXS and traditional collector salicylaldehyde hydroxamic acid as collectors, respectively. In addition, the relationship between floatability of DXS and crystal structure of cassiterite was investigated. By means of infrared spectroscopy analysis of the cassiterite surface before and after adsorbing DXS molecules, the adsorption mechanisms of DXS on the surface of cassiterite were analyzed.Keywords: carboxylic acid modified collector DXS; cassiterite; flotation mechanism
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Chen, Yumeng, Xiong Tong, Dongxia Feng, and Xian Xie. "Effect of Al (III) Ions on the Separation of Cassiterite and Clinochlore Through Reverse Flotation." Minerals 8, no. 8 (August 11, 2018): 347. http://dx.doi.org/10.3390/min8080347.

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Most hydrophobic clay minerals, such as clinochlore, are known to cause problems in the recovery of cassiterite. In this study, a new reagent scheme, i.e., sodium oleate (NaOL) as a collector and Al (III) ions as a depressant, for reverse flotation separation of cassiterite and clinochlore was investigated. The flotation performance and interaction mechanism were studied by microflotation tests, adsorption tests, contact angle measurements, and X-ray photoelectron spectroscopy (XPS) analysis. Results of single mineral flotation experiments showed that NaOL had a different flotation performance on cassiterite and clinochlore, and the addition of Al (III) ions could selectively inhibit the floatability of cassiterite. Reverse flotation tests performed on mixed minerals indicated that the separation of cassiterite and clinochlore could be achieved in the presence of NaOL and Al (III) ions. Adsorption experiments demonstrated that Al (III) ions hindered the adsorption of NaOL on cassiterite surfaces but exerted little influence on the adsorption of NaOL on clinochlore surfaces. Results of contact angle measurements indicated that Al (III) ions could impede the hydrophobization process of cassiterite in NaOL solution. XPS results showed that aluminum species were adsorbed onto the cassiterite surfaces through the interaction with O sites.
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Dissertations / Theses on the topic "Cassiterite"

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Bilgen, Sedat. "Shear flocculation of fine cassiterite." Thesis, University of Exeter, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304300.

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Meechumna, P. "Recovery of rarer minerals from Thai cassiterite concentrates." Thesis, University of Leeds, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355473.

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Farias, Vanderlei de. "Geologia e petrologia do plúton Saubinha e os depósitos de estanho associados, Rondônia /." Rio Claro, 2020. http://hdl.handle.net/11449/192608.

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Orientador: Washington Barbosa Leite Júnior
Resumo: O plúton Saubinha (1.316 ± 16 Ma.) compõe uma das intrusões graníticas do maciço São Lourenço que em conjunto com outros maciços (Caripunas, Abunã e São Simão) representam as áreas de exposição de rochas graníticas, com ou sem depósitos de estanho associados, pertencentes a Suíte Intrusiva São Lourenço-Caripunas (1.32 – 1.30 Ga.). O núcleo de ocorrência dos depósitos primários de estanho ocorre na forma de um stock granítico alongado NW – SE. Constitui-se por biotita-álcali feldspato granitos, cartografados em duas unidades mapeáveis, 1:10.000, e em contatos, aparentemente, transicionais entre si. A Unidade A (UA) que integra tipos heterogranulares a equigranulares de granulação média e, subordinamente porfiríticos de matriz fina; e a Unidade B (UB), restrita a borda leste do plúton, com tipos equigranulares a porfiríticos de matriz fina. Adiciona-se ainda uma lente delgada e não contínua de granito miarolítico a sudeste do plúton e diques de microgranito e aplito que seccionam preferencialmente as rochas da UB. Geoquimicamente são granitos ferrosos, pós-colisionais, tipo A (subtipo A2), de caráter metaluminoso que permeia entre os campos peralcalino e peraluminoso com alcalinidade álcali-cálcica a cálcio-alcalina. Apresentam características de magmas oriundos de anatexia de protólitos quartzo-feldspáticos, de mais alta temperatura (~827,0ºC), pouco hidratados e que se posicionaram em níveis crustais rasos. A variação dos elementos maiores e traços por SiO2 sugere um trend ev... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Saubinha pluton (1.316 ± 16 Ma.) composes one of granitic intrusions of São Lourenço massif, which together with other massifs (Caripunas, Abunã and São Simão) represent the areas of exposure granitic rocks, with or without associated tin deposits, belonging to the evolution of São Lourenço-Caripunas Intrusive Suite (1.32 – 1.30 Ga.). The core of occurrence of primary tin deposits occurs as an NW – SE elongated granitic stock. It consists of biotite-alkali feldspar granites, mapped in two mappable units, in scale 1:10.000, and in apparently transitional contacts. Unit A (UA) that integrates heterogranular to equigranular medium grain types and subordinately porphyritic of fine matrix; and Unit B (UB), restricted to the eastern edge of the pluton, with equigranular to porphyritic fine grain types. In addition, a thin non-continuous lens of miarolitic granite to the southeast of the pluton and dykes of microgranite and aplite that preferentially crosscut the rocks of UB. Geochemically, they are ferrous granites, post-collisional, A-type (subtype A2), of a metaluminous character that permeates between the peralkaline to peraluminous fields with alkali-calcic to calcic-alkali alkalinity. The granites have characteristics of magmas originated from anatexy of quartz-feldspar protoliths, of higher temperature (~827,0ºC), poorly hydrated and positioned in shallow crustal levels. Variation of major and traces elements by SiO2 suggests an evolutionary trend from porphyritic types (UB) ... (Complete abstract click electronic access below)
Mestre
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Gudyanga, Francis Pedzana. "Electrohydrometallurgical reduction of cassiterite (SnO2) associated with sulphide minerals." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47090.

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Silva, Marly Aparecida da. "Prospecção geofísica em ocorrência de estanho associada ao Granito São Sepé (RS)." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154460.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho apresenta e discute os resultados gerados através de levantamentos geofísicos terrestres de Eletrorresistividade e da Polarização Induzida (IP) utilizados na investigação de uma ocorrência de estanho (cassiterita) associada a hidrotermalito do tipo greisen, localizada na borda oeste do Granito São Sepé. A área de estudo está localizada na porção central do Escudo Sul-Riograndense, município de São Sepé (RS). A ocorrência mineral está associada a veios de quartzo inseridos nos quartzos xistos do Complexo Metamórfico Vacacaí. Foram realizadas 6 linhas de caminhamento elétrico dispostas paralelamente na direção N30W. Os dados foram processados para elaboração dos modelos de inversão 2D gerados para os parâmetros de resistividade e cargabilidade. Os modelos de inversão 2D indicaram áreas de alta cargabilidade interpretadas como as prováveis zonas de concentração da cassiterita. Os dados de resistividade não foram suficientes para a definição das zonas mineralizadas, uma vez que a encaixante (quartzo-xistos) e os veios mineralizados apresentam valores de resistividade parecidos. Desse modo, os dados de cargabilidade foram utilizados para gerar os modelos de visualização 3D, os quais permitiram determinar a morfologia e a continuidade da provável zona de ocorrência da cassiterita. Os resultados dos modelos de visualização 3D mostraram que na área investigada ocorrem dois conjuntos de veios de quartzo e que os sulfetos ocorrem disseminados, provavelmente, nos veios com direção N30W.
This work presents and discusses the results generated by terrestrial geophysical surveys of DC resitivity and Induced Polarization (IP) used to investigate an occurrence of tin (cassiterite) associated with greisen type hydrothermalite, located on the western border of São Sepé Granite. The study area is located in the central portion of the Shield Sul-Riograndense, municipality of São Sepé (RS). The mineral occurrence is associated with quartz veins inserted in the schist quartz of the Vacacaí Metamorphic Complex. Six electric path lines were arranged parallel in the N30W direction. The data were processed to elaborate the 2D inversion models generated for the resistivity and chargeability parameters. The 2D inversion models indicated areas of high chargeability interpreted as the probable zones of concentration of cassiterite. The resistivity data were not sufficient for the definition of the mineralized zones, since the nesting agent (quartz-schists) and the mineralized veins presented similar resistivity values. Thus, the chargeability data were used to generate the 3D visualization models, which allowed to determine the morphology and continuity of the probable cassiterite occurrence zone. The results of the 3D visualization models showed that in the investigated area two sets of quartz veins occur and that the sulphides occur probably in the veins with direction N30W.
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Senior, Geoffrey David. "The role of dissolved metal ionic species in the phosphonic acid flotation of cassiterite." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27527.

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The techniques of X-ray photoelectron spectroscopy (XPS), secondary ionization mass spectroscopy, chemical abstraction analysis and microelectrophoresis were used to confirm the existence of iron films on cassiterite grains recovered from the tin concentrator of Renison Limited (Australia). All analyses indicated the level of surface iron contamination to be far in excess of that characteristic of the bulk mineral lattice. No evidence was found in XPS analyses to support the contention that this iron represented lattice iron that had accumulated on the surface due to migration through the lattice, as has been suggested to be the case for certain sulphide minerals. Instead, all of the experimental data supported the hypothesis that the surface film was the result of previous adsorption of hydrous ferric oxide sols onto the cassiterite surface in the plant environment but which had undergone fundamental structural changes when the sample was dried. Specifically, the presence of the iron film did not change significantly the electrokinetic properties of cassiterite, as is known to be the case for other insoluble oxide minerals in the presence of freshly precipitated hydrolyzed metal ionic species. To reconcile these observations, it was shown independently that drying, both thermally and under vacuum, caused the charge reversal phenomena related to hydrolyzed metal ion adsorption either to diminish or disappear. In the presence of styryl phosphonic acid, the iron contaminated cassiterite exhibited a microflotation response that corresponded remarkably with the actual flotation observed in the plant from which it was taken. A critical examination of the literature revealed that this behaviour was indicative of that reported for other cassiterites in both batch and plant flotation of ores. Most notably the mineral floated strongly between pH 4.0 and 7.5. However, after acid leaching, the pH of maximum recovery moved to more acidic values around pH 2.0 and the mineral floated much less strongly in the slightly acidic to alkaline range. This latter behaviour correlated with a large body of published data for which it was known that the cassiterite used was either a high purity sample, not exposed to solutions containing dissolved metal ionic species, or had been acid cleaned prior to test work. Conversely, results from fundamental studies, where this was known not to be the case, exhibited remarkable consistency with the data obtained for the untreated cassiterite sample. The principal influence of the iron species adsorbed onto the surface of cassiterite was shown to be flotation activation in the pH range where the adsorbed species were not extensively solubilized. In the acidic range below pH 4.0, solubilization of the surface iron entities occurred which caused a severe flotation depressant effect. This solubilization was promoted in the presence of sodium fluoride, a known complexing agent for iron in acidic solutions, and the phosphonic acid. In the latter case, evidence was found for the formation of a soluble iron phosphonate complex. Independent confirmation was also sought and obtained from light scattering photometry to verify the strong affinity of phosphonic acids for hydrous ferric oxide species. Other ionic entities, such as those of magnesium and calcium were found to interact far less strongly. On the basis of this research, it has proven possible to provide a rational interpretation of all previously existing data pertaining to cassiterite flotation with phosphonic acids, for which reasonable sample description and preparation information exist. Such a reconciliation has not previously been provided, either through studies on the effects of cassiterite mineral lattice impurities or other work with dissolved metal ionic species. Furthermore, a significant link has been established between the results of fundamental analyses and industrial related observations. In particular, commercially successful practices, such as fluoride pretreatment of ore slurries prior to cassiterite flotation, now can be interpreted successfully in terms of fundamental ion solution chemistry. The evidence is that such processes involve the solubilization under acidic conditions of adsorbed iron hydroxy sols from the surface of minerals prior to cassiterite flotation. A bulk rejection of the complexed metal ionic species is then made in the water split of the desliming circuit that precedes flotation. The solution chemical evidence obtained supporting such a mechanism is considerable and no finding, in this work or elsewhere, refutes it.
Applied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
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Goldmann, Simon [Verfasser]. "Mineralogical-geochemical characterisation of cassiterite and wolframite ores for an analytical fingerprint / Simon Goldmann." Hannover : Technische Informationsbibliothek (TIB), 2016. http://d-nb.info/1170364144/34.

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GONZALES, LORGIO GILBERTO VALDIVIEZO. "ELECTROFLOTATION OF CASSITERITE AND QUARTZ FINES USING A RHODOCOCCUS OPACUS STRAIN AS A BIOREAGENT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=22109@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
Neste trabalho foi realizado o estudou da eletroflotação de finos de cassiterita e quartzo, utilizando o microrganismo Rhodococcus opacus como biorreagente. Os ensaios de eletroflotação foram realizados em tubo de Hallimond modificado, usando aço inox como cátodo e uma tela de Ti/RuO2 como ânodo. As características da superfície do microrganismo e os possíveis mecanismos de interação envolvidos na bioadesão foram avaliados com base em medições de potencial zeta, análises por espectrometria no infravermelho e análises de micrografias obtidas no microscópio eletrônico de varredura (MEV). Após a interação foi observado um caráter hidrofóbico nas partículas de ambos os minerais, e verificado pelas medidas de ângulo de contato. Através de ensaios de adesão foi observada uma maior afinidade do microrganismo pela cassiterita. Estes ensaios também indicaram o pH da solução como o parâmetro de maior influencia, sendo que, maiores quantidades de bactéria aderida foram obtida em valores de pH em torno de 3,0; com 5 min de interação. O tamanho médio da bolha Sauter, obtido pelo método de difração laser, foi de 26 micrometros, usando 50 mg/L de microrganismo e 51,4 mA/cm2 de densidade de corrente. A densidade de corrente e concentração de bactérias mostraram-se os parâmetros de maior influencia no tamanho das bolhas. Assim, bolhas de tamanho menor foram obtidas quando os valores destes parâmetros foram incrementados. A melhor flotabilidade para a cassiterita foi observada em pH 5,0, sendo 64.5 por cento com uma concentração de bactérias de 50 mg/L. Para o quartzo a porcentagem foi em torno de 30 por cento em toda a faixa de pH e concentração da bactéria. Os ensaios de microflotação mostraram que R. opacus contribuiu para uma elevada flotação da cassiterita e uma limitada flotação do quartzo. Ensaios de flotabilidade para uma mistura sintética de cassiterita-quartzo (1:1) foram também realizados, sendo obtidas recuperações médias de cassiterita de 67,8 por cento com um teor no concentrado de 64,4 por cento, partindo de um teor de alimentação igual a 42,9 por cento de SnO2.
In this work, the electroflotation of quartz and cassiterite fine was carried out using Rhodococcus opacus as bioreagent. The electroflotation cell was Hallimond tube modified, with stainless steel as cathode and Ti/RuO2 mesh as anode. The characteristics of the microorganism surface and the corresponding interaction mechanisms in the bioadhesion were evaluated based on the zeta potential, infrared spectroscopy, scanning electron microscopy and contact angle measurements. After the interaction the resulting particles exhibited hydrophobic character, as verified by the increase of the contact angle. The results, also, showed that the microorganism has a higher affinity for cassiterite particles. It was observed a strong influence of pH on adhesion. The higher adhesion values were obtained around pH 3 and the time required to reach equilibrium was 5 min for both minerals. Current density and bacterial concentration seem to be the main parameters affecting the mean diameter of bubbles. Fine bubbles were obtained when the values of these parameters increased. The mean bubble size obtained (Sauter) by the laser diffraction method was 26 micrometers with an organism concentration of 50 mg/L and current density of 51.4 mA/cm2. The best flotability of cassiterite (64.5 per cent) was observed at pH 5.0 with a R. opacus concentration of 50 mg/L. For quartz the maximum flotability achieved was 30 per cent throughout the all pH range and bacteria concentration tested. It is shown through microflotation tests that R. opacus is able to float cassiterite very well and quartz limitedly. Also, the flotability of cassiterite was evaluated in tests by using a synthetic mineral mixture. An average recovery of 67.8 per cent of cassiterite was obtained with a concentrated grade of 64.4 per cent, starting from 42,9 per cent in the feed grade (SnO2).
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Halter, Werner E. "Physicochemical controls of greisen formation and cassiterite deposition at the East Kemptville tin deposit, Nova Scotia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ29955.pdf.

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Halter, Werner E. "Physicochemical controls of greisen formation and cassiterite deposition at the East Kemptville tin deposit, Nova Scotia." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=42050.

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Prior to complete crystallization of leucogranitic magma at East Kemptville, tectonic fracturing induced a pressure drop, allowing a NaCl-HCl-HF-rich fluid phase to separate. This fluid caused pervasive sericitization and extracted the ore metals from the melt. It was then channeled into the fractures and caused greisenization in the apical part of the intrusion. During greisenization, the leucogranite was converted into quartz-sericite greisen through sequential replacement of K-feldspar and albite. Muscovite was replaced by topaz to form quartz-topaz greisen, host to sulphide and cassiterite mineralization. In this greisen, the OH$ sp-$ of muscovite is replaced by H$ sb2$O and O$ sp{2-},$ which leads to its dehydration during microprobe analyses. Close to veins, suphides and cassiterite were re-dissolved in quartz greisen. The altering fluid had a pH of 3.0 and contained 4.8m Cl, 3.7m Na, 0.53m Fe and minor F, K, S and Sn as determined from fluid inclusions and mineral equilibria. The temperature of greisenization was determined to be $480 pm 15 sp circ rm C$ using a F-OH exchange geothermometer between topaz and muscovite and oxygen isotopic data on cassiterite and quartz; the pressure was estimated to be 4.1 $ pm$ 1.0 kbars using fluid inclusion isochores. Alteration occurred though a process of compensated infiltration in which small aliquots of fluid were exchanged between the rock and the vein, while the bulk flow was parallel to the vein. This created a distribution of the components controlled by chemical potential gradients; Fe, Sn, S and F were transported away from the vein and Na towards it. Changes in physicochemical parameters of the fluid were quantified using computer simulation, which, in conjunction with fluid inclusion data, indicates that cassiterite precipitated in response to a pH increase. Changes in a$ sb{ rm Cl-}$ and $f rm O sb2$ were insufficient to account for cassiterite precipitation or acted against it. Modeling further showed that
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Books on the topic "Cassiterite"

1

D'Agostino, John P. Cassiterite occurrences in the Shelby area, North and South Carolina. Washington, D.C: U.S. G.P.O., 1985.

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Andrade, Manuel Correia de Oliveira. A cassiterita nas regiões norte e nordeste do Brasil. [Rio de Janeiro, RJ, Brasil?]: CNPq, CETEM, 1991.

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Manuel Correia de Oliveira Andrade. A cassiterita nas regiões norte e nordeste do Brasil. [Rio de Janeiro, RJ, Brasil?]: CNPq, CETEM, 1991.

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(Organization), Global Witness, ed. La paix sous tension: Dangereux et illicite commerce de la cassitérite dans l'est de la RDC. : un rapport du Global Witness, juin 2005. Washington DC: Global Witness Pub. Inc., 2005.

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Andrews, P. R. A. Review of developments in cassiterite flotation in respect of physico-chemical considerations. S.l: s.n, 1990.

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V, Eales H., Ehlers Dirk Leonardus, and Council for Geoscience (South Africa), eds. The flurorite, cassiterite and sulphide deposits associated with the acid rocks of the Bushveld Complex. Pretoria: Council for Geoscience, Geological Survey of South Africa, 2001.

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Nourhussen, Seada. Bloedmobieltjes: Coltan in Congo. Amsterdam: KIT, 2011.

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Bray, E. A. Du. Geology of the Silsilah ring complex and associated tin mineralization, Kingdom of Saudi Arabia. Washington: U.S. G.P.O., 1988.

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Bray, E. A. Du. Geology of the Silsilah ring complex and associated tin mineralization, Kingdom of Saudi Arabia. Washington, DC: Dept. of the Interior, 1988.

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Book chapters on the topic "Cassiterite"

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Castroviejo, Ricardo. "Cassiterite (cst)." In A Practical Guide to Ore Microscopy—Volume 1, 159–63. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-12654-3_26.

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Leuprecht, G., and P. Paschen. "Hydrogen reduction of cassiterite concentrates." In EMC ’91: Non-Ferrous Metallurgy—Present and Future, 57–62. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3684-6_6.

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Mingsheng, Peng, Lu Wenhua, and Zou Zhengguang. "Spectroscopic Analysis and Genesis of Cassiterite." In Geology of Tin Deposits in Asia and the Pacific, 319–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-72765-8_22.

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Vdovina, I. "Crystallomorphology of Cassiterite and Its Practical Importance." In Springer Proceedings in Earth and Environmental Sciences, 157–61. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22974-0_37.

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Onyedika, Gerald, Tochi Onwumere, and Martin Ogwuegbu. "Kinetic Study of Recovery of Iron from Cassiterite Ore." In EPD Congress 2013, 269–76. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118658468.ch31.

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Baba, Alafara A., Abdulrasheed O. Yusuf, Mustapha A. Raji, Kuranga I. Ayinla, Abdullah S. Ibrahim, Folahan A. Adekola, Abdul G. F. Alabi, et al. "Potential of a Nigerian Cassiterite Ore for Industrial Steel Coatings." In Rare Metal Technology 2020, 201–8. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36758-9_19.

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Jun, Ye, Zhou Huaiyang, and Chen Zhugi. "On the Ore-Forming Mechanism of Some Cassiterite-Sulphide Deposits in South China." In Geology of Tin Deposits in Asia and the Pacific, 278–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-72765-8_19.

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Gerald, Onyedika, Ogwuegbu Martin, Ejike Emmanue, Asuwaji, Ayuk, and Nwoye Chukwuka. "Recovery of High Grade SnO2from Cassiterite Ore by Microwave Pretreatment, Leaching and Precipitation." In Characterization of Minerals, Metals, and Materials 2013, 407–14. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118659045.ch47.

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Abdulfattah, Furqan, Ibrahim Rafukka, Markus Bwala, Muhammad Muzzammil Abduljalal, and Kabir Isa. "Petrographic and SEM-EDS Analysis of Riruwai Cassiterite Ore in North Western Nigeria." In Characterization of Minerals, Metals, and Materials 2021, 95–100. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65493-1_9.

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Zhang, Yuanbo, Zijian Su, Zhixiong You, Bingbing Liu, Guang Yang, Guanghui Li, and Tao Jiang. "Sodium Stannate Preparation from Cassiterite Concentrate and Sodium Carbonate by Roasting under a CO/CO2Atmosphere." In Rare Metal Technology 2014, 163–69. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888551.ch30.

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Conference papers on the topic "Cassiterite"

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Neymark, Leonid, Richard Moscati, Anatoly Larin, and John Slack. "How Robust is the Cassiterite U-Pb Geochronometer?" In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1917.

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Karolová, Lucie, Jakub Trojan, and Miroslav Trojan. "Synthesis and colour properties of the blue-violet cassiterite pigments." In The 4th Electronic International Interdisciplinary Conference. Publishing Society, 2015. http://dx.doi.org/10.18638/eiic.2015.4.1.474.

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WA kalenga, Michel Kalenga. "Review on key parameters during carbothermic reduction of Tin from cassiterite." In METAL 2021. TANGER Ltd., 2021. http://dx.doi.org/10.37904/metal.2021.4246.

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Drivenes, Kristian, Bjorn Eske Sorensen, William Brownscombe, Morten Peder Raanes, Reimar Seltmann, and John Spratt. "ZONED CASSITERITE FROM SW ENGLAND – AN EXAMPLE OF ORTHOROMBIC OR MONOCLINIC SNO2?" In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-323742.

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Lalasari, Latifa Hanum, F. Firdiyono, Lia Andriyah, Ariyo Suharyanto, Tri Arini, Aga Ridhova, and Nadia Chrisayu Natasha. "The dissolution of cassiterite Indonesia using hydrometallurgical process in the aerated reactor." In PROCEEDINGS OF THE 3RD INTERNATIONAL SEMINAR ON METALLURGY AND MATERIALS (ISMM2019): Exploring New Innovation in Metallurgy and Materials. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0002208.

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Borchert, Manuela, Pilar Valsera Moreno, Max Wilke, Stephan Klemme, Maria Kokh, Christian Schmidt, Wolfgang Morgenroth, and Denis Testemale. "Tin transport in ore fluids - in-situ insight from cassiterite dissolution experiments." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.10072.

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Wang, Qinxia, Renzhi Zhu, and Huaiwei Ni. "Highly soluble cassiterite in alkaline silicate-rich fluids: implication for tin mineralization." In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.16079.

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Jeong, Youn-Joong, Sook Ju Kim, Hyojin Kim, Giun Han, and Yeongmin KIM. "Sn isotope analysis of cassiterite from South Korea using MC-ICP-MS." In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.17247.

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Goodey, Matthew, Simon Tapster, Nick M. W. Roberts, Nicholas Gardiner, Laurence Robb, Robin Shail, and Diksha Bista. "Turning advances in high-precision cassiterite U-Pb geochronology into improved mineral system models." In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.19346.

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He, Sheng, Dongfa Guo, Jianyong Cui, Ruiping Liu, and Zengwei Fan. "Possible High U Effect on Secondary Ion Mass Spectrometry (SIMS) of Cassiterite U-Pb Dating." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.996.

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Reports on the topic "Cassiterite"

1

McClenaghan, M. B., D. M. Brushett, C. E. Beckett-Brown, R. C. Paulen, J. M. Rice, A. Haji Egeh, and A. Nissen. Indicator mineral studies at the Brazil Lake LCT Pegmatites, southwest Nova Scotia. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331686.

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Indicator mineral research is currently being undertaken in partnership with the Nova Scotia Department of Natural Resources and Renewables at the Brazil Lake lithium-cesium-tantalum (LCT) pegmatites in southwest Nova Scotia as part of the Geological Survey of Canada's Targeted Geoscience Initiative(TGI) program. The pegmatites, discovered in 1960, are well known from previous detailed bedrock mapping and surficial studies, and are informally named based on their relative geographic positions as the South and North pegmatites. The South pegmatite naturally outcrops, and both pegmatites are surrounded by spodumene-rich boulders on the surface of the thin-till covered (<4 m) drumlinized glacial landscape. For these reasons, the pegmatites are excellent sites to test indicator mineral exploration methods for Li and associated critical elements (e.g. Ce, Ta). Five pegmatite samples were collected for detailed study and analysis of potential indicator minerals. Close to the pegmatite and up to 13 km down ice (south-southeast), 87 bulk (10-14 kg), till sediment samples were collected for indicator mineral analysis. A total of 105 till samples were collected around the pegmatite and across the region for matrix geochemistry. A preliminary list of indicator minerals includes mid-density (e.g., spodumene, tourmaline, blue apatite) and high-density mineral species (e.g., columbite-tantalite, cassiterite) and this list is expected to expand as the detailed studies progress. Trenches dug in the Fall 2022 to collect till samples on the proximal down ice (south) sides of both pegmatites revealed abundant spodumene pebbles and small cobbles in the till, indicating that the local till should display strong indicator mineral and matrix geochemical signatures derived from the pegmatites.
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Cassiterite occurrences in the Shelby area, North and South Carolina. US Geological Survey, 1985. http://dx.doi.org/10.3133/b1569.

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