 | | Book | | azurite et malachite massives Azurite (Chessy, Rhône) Tranche polie dans une stalactite d’azurite et...néphrite ») : (Ca,Fe)2Mg5Si8O22(OH)2 (trémoliteactinote) ; pyroxènes : Na(Al,Cr,Fe)Si2O6 (jadéite et...localité-type de l’azurite est celle de Chessy dans le Rhône dont les échantillons attirent toutes les convoitises...stalactiforme et rubanée sont en Oural et au Katanga. En France, hormis la célèbre mine de Chessy (localité-type...gisements dans les Vosges, en Auvergne, Var, Loire, Tarn, Savoie, Alpes-Maritimes, Corse, des Pyrénées |  | | Journal (article/letter/editorial) | | Nb-Ta-Ti-bearing oxide minerals (Nb-Ta-bearing rutile, columbite-group minerals) represent the most common Nb-Ta... Tungsten-bearing columbite-(Fe), W-bearing ixiolite, wodginite and tapiolite-(Fe) are extremely rare...represented mostly by columbite-(Fe) and rarely by columbite-(Mn), with Mn/(Mn+Fe) ratio ranging from 0...0.23 to 0.94. The exceptionally rare Fe-rich, W-bearing ixiolite occurs only as inclusions in Nb-Tabearing...Mn/(Mn+Fe) ratio is 0.42–0.51, whereas the coexisting tapiolite-(Fe) has a distinctly lower Mn/(Mn+Fe) ratio |  | | Journal (article/letter/editorial) | | minerals Article Occurrence and Composition of Columbite-(Fe) In the Reduced A-Type Desemborque Pluton, Graciosa...Published: 4 May 2020 Abstract: Columbite-(Fe) is a post-magmatic accessory mineral occurring...within both the rocks, named columbite-1 and columbite-2. The columbite-1 type is characterized by zoned...Nb-rich cores with low Ta/(Ta + Nb) and Mn/(Mn + Fe) ratios (0.02–0.08 and 0.17 to 0.21 apfu, respectively)...Mn/(Mn + Fe) ratios (from 0.14 to 0.22) relative to the former cores. On the other hand, the columbite-2 type |  | Breiter, Karel, Korbelová, Zuzana, Chládek, Štěpán, Uher, Pavel, Knesl, Ilja, Rambousek, Petr, Honig, Sven, Šešulka, Vojtěch (2017) Diversity of Ti–Sn–W–Nb–Ta oxide minerals in the classic granite-related magmatic–hydrothermal Cínovec/Zinnwald Sn–W–Li deposit (Czech Republic) European Journal of Mineralogy, 29 (4) 727-738 doi:10.1127/ejm/2017/0029-2650 | Journal (article/letter/editorial) | | Common Nb–Ta-rich rutile and rare cassiterite, columbite-(Fe) and -(Mn), and minerals of the pyrochlore-supergroup...in deeper parts of the pluton, whereas common columbite occurs with rare W-rich ixiolite, qitianlingite...Ta-poor cassiterite, which are accompanied by columbite-group minerals, rare W-rich ixiolite and qitianlingite...Throughout the pluton, the molar Mn/(Fe þ Mn) ratio in columbite increases from 0.15–0.40 in the deeper...the rims are always Ta-enriched, whereas the Mn/(Fe þ Mn) values in the rims are equal or lower. The |  | | Journal (article/letter/editorial) | | Abstract: Oxide minerals (Nb–Ta-rich rutile, columbite-group minerals and W-bearing ixiolite) represent...and also topaz- and Li-mica-bearing granite. Columbite group minerals occur usually as euhedral to subhedral...represented by columbite-(Fe) with Mn/(Mn + Fe) ratio ranging from 0.07 to 0.15. The rare Fe-rich W-bearing...needle-like crystals. The ixiolite is Fe-rich with relatively low Mn/(Mn + Fe) and Ta/(Ta + Nb) values (0.10–0...SnO2 ). Keywords: topaz granite; Nb–Ta rutile; columbite; ixiolite; Saxothuringian Zone 1. Introduction |  | | Journal (article/letter/editorial) | | Université de Lorraine, CNRS, CREGU, F-54000 Nancy, France; michel.cuney@univ-lorraine.fr ...district in central France, a well-known site, particularly for the occurrence of the Beauvoir rare-metal granite...the intrusion of the outcropping Colettes and Beauvoir granites. The last generation formed a smaller...to the greisen alteration developed within the Beauvoir granite. The contribution of Yang et al. [9] is...associated with the formation of the Damogutu Sn–Fe skarn deposit. The iron enrichment in the Damogutu |  | Xie, Lei, Wang, Ru-Cheng, Che, Xu-Dong, Huang, Fang-Fang, Erdmann, Saskia, Zhang, Wen-Lan (2016) Tracking magmatic and hydrothermal Nb–Ta–W–Sn fractionation using mineral textures and composition: A case study from the late Cretaceous Jiepailing ore district in the Nanling Range in South China. Ore Geology Reviews, 78. 300-321 doi:10.1016/j.oregeorev.2016.04.003 | Journal (article/letter/editorial) | | we have studied SC RI here, using mineral (columbite, rutile, wolframite, cassiterite, zircon, and...compositional data, mineral textures, and zircon and columbite U-Pb geochronology. Our age data shows that the...propose that: (1) subhedral-euhedral, low-Ta columbite crystallized from melt; (2) euhedral-subhedral...transition of the system; and (3) high-Ta PT columbite and subhedral cassiterite up to ~10 m in size...for any rigorous ore exploration. Key Words: Columbite; Cretaceous Nb-Ta mineralization; Jiepailing; |  | Petrik, I., Kubis, M., Konecny, P., Broska, I., Malachovsky, P. (2011) Rare phosphates from the Surovec topaz - Li-mica microgranite, Gemeric unit, Western Carpathians, Slovak Republic: role of the F/H2O of the melt. The Canadian Mineralogist, 49 (2) 521-540 doi:10.3749/canmin.49.2.521 | Journal (article/letter/editorial) | | apatite. In the absence of biotite, the increasing Fe and Mn stabilized arrojadite. Both types of granite...l’apatite. En l’absence de biotite, l’augmentation de Fe et Mn a stabilisé l’arrojadite. Les deux sortes de...with cassiterite, wolframite-group minerals and columbite–tantalite (Tischendorf 1977). Lithium may not...comprise apatite, fluorite and topaz, accompanied by Li–Fe micas (Breiter 2002, Dianiška et al. 2002, Lukkari...contain topaz, zinnwaldite and a variety of rare Fe–Mn phosphates (Breiter 2002). Volcanic equivalents |  | Harlaux, Matthieu, Marignac, Christian, Cuney, Michel, Mercadier, Julien, Magott, Rémi, Mouthier, Bernard (2015) Nb-Ti-Y-HREE-W-U Oxide Minerals With Uncommon Compositions Associated With the Tungsten Mineralization In the Puy-Les-Vignes Deposit (Massif Central, France): Evidence For Rare-Metal Mobilization By Late Hydrothermal Fluids With A Peralkaline Signature. The Canadian Mineralogist, 53 (4) 653-672 doi:10.3749/canmin.1400096 | Journal (article/letter/editorial) | | IN THE PUY-LES-VIGNES DEPOSIT (MASSIF CENTRAL, FRANCE): EVIDENCE FOR RARE-METAL MOBILIZATION BY LATE...CREGU GeoRessources, 54506 Vandœuvre-lès-Nancy, France RÉMI MAGOTT Université de Franche-Comté, CNRS...Besanc¸on, France BERNARD MOUTHIER 64, rue Jeanne d'Albret, 78100 Saint-Germain-en-Laye, France ABSTRACT...paragenesis composed of zircon, xenotime, monazite, Nb-Fe-W rutile, and Nb-Ti-YHREE-W-U oxide minerals (hereafter...group of anatase-columbite solid solution and a second group of euxenite-(Y)-columbite solid solution. |  | | Journal (article/letter/editorial) | | rare-element class. Moreover, abundant cassiterite and columbite-group minerals crystallized in the Cruz del Rayo...Complex. Cassiterite, rutile, ilmenite and tantalite-(Fe) occur disseminated in the border facies of the External...del Rayo: (i) granite-like pegmatites, with columbite-(Fe) I and II and cassiterite, in which the influence...tantalite-(Fe), and (ii) greisen-like bodies, which contain high amounts of columbite-(Fe), columbite(Mn),...crystallization of the secondary assemblage, richer in Fe and Ta, is interpreted mainly as a consequence of |  | | Journal (article/letter/editorial) | | due in part to historic influx of ‘conflict’ columbite-tantalite concentrate, or “Coltan,” that caused...significant deposits of Ta and Nb contain pyrochlore, columbite-tantalite, fersmite, loparite and strüverite....Rare-elements . Strategic metals . Pyrochlore . Columbite . Tantalite Introduction Tantalum (Ta) and niobium...Pyrochlore (Nb-rich variety) and columbite (Nb-rich end member of the columbite-tantalite series) are the main...metric tonnes of Cu content; Brininstool 2013) and Fe (2,950 million metric tonnes of metal; Tuck 2013) |  | Rao, C., Wang, R. C., Hu, H., Zhang, W. L. (2009) COMPLEX INTERNAL TEXTURES IN OXIDE MINERALS FROM THE NANPING No. 31 DYKE OF GRANITIC PEGMATITE, FUJIAN PROVINCE, SOUTHEASTERN CHINA. The Canadian Mineralogist, 47 (5) 1195-1212 doi:10.3749/canmin.47.5.1195 | Journal (article/letter/editorial) | | minerals show a sequence from columbite-(Fe) (zone I) through tantalite-(Fe) (zone II) to tantalite-(Mn)...but distinctly become columbite + wodginite in zone IV and, rarely, columbite in the zone V. Microscopic...Microscopic tapiolite-(Fe) is identified as a product of exsolution in cassiterite from the zones II–III, whereas...complex associations of wodginite, columbite–tantalite and tapiolite-(Fe) are characteristic of cassiterite...cassiterite in zone IV. The classic variation of the columbite-group minerals from the zones I to III seems to |  | Xie, Lei, Tao, Xiangyuan, Wang, Rucheng, Wu, Fuyuan, Liu, Chen, Liu, Xiaochi, Li, Xingkui, Zhang, Rongqing (2020) Highly fractionated leucogranites in the eastern Himalayan Cuonadong dome and related magmatic Be–Nb–Ta and hydrothermal Be–W–Sn mineralization. Lithos, 354. 105286 doi:10.1016/j.lithos.2019.105286 | Journal (article/letter/editorial) | | pegmatite are associated with 29 rare-metal 30 columbite-group minerals, tapiolite, Nb–Ta-bearing rutile...38 in the Cuonadong dome at ca. 20 and 17 Ma. Columbite U–Pb dating indicates two 39 stages of rare-metal...mineralization. 43 44 45 Keywords 46 beryl; columbite; tapiolite; U–(Th)–Pb dating; differentiation...resources (Liang et al., 2018). Beryl and 70 columbite-group minerals (CGMs) are hosted by the pegmatite...Na, and K for feldspar; Si, Al, Fe, K, and 163 F for mica; Si, Al, Fe, and Mn for garnet; Si, Al, and |  | | Journal (article/letter/editorial) | | 1515 COMPOSITIONAL AND STRUCTURAL VARIATIONS IN COLUMBITE-GROUP MINERALS FROM GRANITIC PEGMATITES OF THE...numerous rare-element granitic pegmatites that carry columbite-group minerals (CGM) as the principal (Nb,Ta)-bearing...fields. Columbite-group minerals from the Brunswick pegmatite field mainly consist of columbite-(Fe), commonly...pegmatites from the Oxford field carry columbite-(Fe), columbite-(Mn) and tantalite-(Mn) with low Ti and...field. Limited concurrent fractionation of Mn from Fe and Ta from Nb observed in the Brunswick pegmatite |  | | Journal (article/letter/editorial) | | of the main Nb–Ta oxide minerals (including columbite-(Fe), fersmite, fergusonite-(Y), and especially...different stages were identified. The euhedral columbite-(Fe), fersmite, and pyrochlores I and II minerals...dike; Panxi region; pyrochlore group minerals; columbite subgroup minerals with regard to jurisdictional...studies [22–30]. The veinlets of tantalite-(Fe) in the (Fe) in thepegmatite Nanping pegmatite inChina...compositions of main Nb–Ta oxide minerals (including columbite-(Fe), fersmite, fergusonite-(Y), and and pythe main |  | Zhu, Zeying, Wang, Rucheng, Marignac, Christian, Cuney, Michel, Mercadier, Julien, Che, Xudong, Lespinasse, Marc-Yves (2018) A new style of rare metal granite with Nb-rich mica: The Early Cretaceous Huangshan rare-metal granite suite, northeast Jiangxi Province, southeast China. American Mineralogist, 103 (10) 1530-1544 doi:10.2138/am-2018-6511 | Journal (article/letter/editorial) | | Vandoeuvre-lès-Nancy, France 3 Ecole Nationale Supérieure des Mines de Nancy, Parc de Saurupt, F-54042 Nancy, France 1 ...occurrence in which Nb is essentially hosted by Li–Fe micas. The Huangshan granites are part of the Early...resource. Contrasting with the great rarity of columbite, there is abundant Hf-rich zircon, Y-rich fluorite...and the rest from other oxide minerals such as columbite group minerals (Table 1; Linnen et al. 2014)....Major Nb-Ta-bearing minerals Mineral Pyrochlore Columbite Wodginite Ixiolite Microlite Nb-rich rutile Loparite |  | Zhu, Ze-Ying, Wang, Ru-Cheng, Che, Xu-Dong, Zhu, Jin-Chu, Wei, Xing-Lin, Huang, Xiao'e (2015) Magmatic–hydrothermal rare-element mineralization in the Songshugang granite (northeastern Jiangxi, China): Insights from an electron-microprobe study of Nb–Ta–Zr minerals. Ore Geology Reviews, 65. 749-760 doi:10.1016/j.oregeorev.2014.07.021 | Journal (article/letter/editorial) | | 30 July 2014 Available online xxxx Keywords: Columbite-group minerals Nb–Ta–Sn–W mineral assemblage Zircon...rare-element granites. Mn # [Mn/(Fe + Mn)] and Ta# [Ta/(Nb + Ta)] of columbite-group minerals and Hf# [Hf/(Zr...subhedral-shaped columbite-(Fe) (CGM-I) with low Mn# (0.16–0.37) and Ta# (0.05–0.29). Columbite-(Fe) is penetrated...Nb–Ta–Sn–W mineral assemblages, including tantalite-(Fe), wodginite (sl), cassiterite, and ferberite. Tantalite...Petrographic features indicate that the early-stage of columbite and zircon were formed in magmatic environment |  | | Journal (article/letter/editorial) | | contain high amounts of zircon, fergusonite-(Y), columbite-(Fe), allanite-(Ce), xenotime-(Y), monazite-(Ce...Nd), (0.5% by volume), with a small amount of columbite-(Fe), xenotime-(Y), thorite and gummite that form...contain many inclusions of fergusonite (figure 6f), columbite, xenotime and haematite (figure 6g). Allanite-(Ce)...length and 0.6 cm in width; figure 6k and l). Columbite crystals are locally found as large black prismatic...fergusonite-(Y), allanite-(Ce) monazite, xenotime, columbite, thorite and gummite occur as trace/accessory |  | Pršek, Jaroslav, Majka, Jaroslaw, Uher, Pavel, Chudík, Peter (2010) Niobium-tantalum minerals in the Skoddefjellet NYF granitic pegmatite, Svalbard Archipelago, Norway: Primary versus secondary assemblage. Neues Jahrbuch für Mineralogie - Abhandlungen, 187 (3) 235-248 doi:10.1127/0077-7757/2010/0172 | Journal (article/letter/editorial) | | Zr/Hf (~8–10), and (~8–12) Nb/Ta ratios. Columbite-(Fe) and columbite-(Mn) (locally enriched in Ti, Y, Sc...zoning of columbite group minerals is expressed by distinct rimward increase of the Mn/(Mn+Fe) ratio (0...alteration. Key words: Nb-Ta oxide minerals, columbite, Nb,Ta-rich titanite, Nb,Ta-rich rutile, ilmenite...and compositional variations in terms of Ta/Nb, Mn/Fe, Ti, W, Sn, REE, Sc, Sb, Bi, Ca, Na and other elements...family of rare-element pegmatites, especially columbite-tantalite, tapiolite, wodginite groups, has been |  | Bastos Neto, A. C., Pereira, V. P., Ronchi, L. H., de Lima, E. F., Frantz, J. C. (2009) THE WORLD-CLASS Sn, Nb, Ta, F (Y, REE, Li) DEPOSIT AND THE MASSIVE CRYOLITE ASSOCIATED WITH THE ALBITE-ENRICHED FACIES OF THE MADEIRA A-TYPE GRANITE, PITINGA MINING DISTRICT, AMAZONAS STATE, BRAZIL. The Canadian Mineralogist, 47 (6) 1329-1357 doi:10.3749/canmin.47.6.1329 | Journal (article/letter/editorial) | | rock matrix, (2) conversion of pyrochlore to a columbite-group mineral, characterized by gradual loss of...conversion du pyrochlore en un membre du groupe de la columbite, avec perte graduelle du Pb et enrichissement...(cassiterite). Niobium and Ta (pyrochlore and columbite) are exploited as by-products. Fluorine (cryolite...2006a, 2008, Weber et al. 2007), pyrochlore and columbite (Minuzzi et al. 2006b), and gagarinite-(Y) (Pires...of sodic pyroxene or amphibole, high Na2O + K2O, Fe, F, Nb, Zr, and REE contents, low Ta/Nb values, and |  | Ballouard, Christophe, Elburg, Marlina A., Tappe, Sebastian, Reinke, Christian, Ueckermann, Henriette, Doggart, Shane (2020) Magmatic-hydrothermal evolution of rare metal pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa) Ore Geology Reviews, 116. 103252 doi:10.1016/j.oregeorev.2019.103252 | Journal (article/letter/editorial) | | pegmatite. The rare metal contents of muscovite and columbite group minerals (CGM) increase from the weakly...zone refining likely induced a decrease of spodumene Fe contents and increase of CGM Ta contents toward the...fluorite, beryl, allanite, gadolinite, euxenite, columbite group minerals (CGM) and pyrochlore in addition...Norabees I pegmatite is exposed in a ~55 by 25 m quarry that is at maximum 30 m deep. Approximately 1100...anticorrelation, with a slope around -1 in an Al versus Fe diagram, likely reflecting the substitution between |  | Guowu, Li, Guangming, Yang, Fude, Lu, Ming, Xiong, Xiangkun, Ge, Baoming, Pan, de Fourestier, Jeffrey (2016) Fluorcalciopyrochlore, A New Mineral Species From Bayan Obo, Inner Mongolia, P.R. China. The Canadian Mineralogist, 54 (5) 1285-1291 doi:10.3749/canmin.1500042 | Journal (article/letter/editorial) | | species (IMA2013-055) occurring in the Bayan Obo Fe-Nb-REE deposit, Inner Mongolia, People’s Republic...bastnäsite-(Ce), zircon, magnetite, pyrite, fersmite, columbite-(Fe), monazite-(Ce), rutile, and others. Crystals...H8) (Wang Xibin 2002). Enrichment of REE, Nb, and Fe constituent minerals occurs in dolomite, alteration...deposit, but is a complex deposit which includes REE-Nb-Fe carbonate magmatic deposits, replacement alteration...bastnäsite-(Ce), zircon, magnetite, pyrite, fersmite, columbite-(Fe), monazite-(Ce), and rutile. APPEARANCE AND |  | Garate-Olave, Idoia, Roda-Robles, Encarnación, Gil-Crespo, Pedro Pablo, Pesquera, Alfonso, Errandonea-Martin, Jon (2020) The Tres Arroyos Granitic Aplite-Pegmatite Field (Central Iberian Zone, Spain): Petrogenetic Constraints from Evolution of Nb-Ta-Sn Oxides, Whole-Rock Geochemistry and U-Pb Geochronology. Minerals, 10 (11) 1008 doi:10.3390/min10111008 | Journal (article/letter/editorial) | | oxides from Tres Arroyos correspond to columbite-(Fe), columbite-(Mn) and cassiterite. Niobium-Ta oxides...oxides show a marked increase in the Mn/(Mn+Fe) ratio from the barren aplite-pegmatites up to the Li-rich...probable factors controlling fractionation of Mn/Fe and Ta/Nb reflected in Nb-Ta oxides may be attributed...9 Ma, determined by LA-ICP-MS U-Pb dating of columbite-tantalite oxides, reinforces the linkage of the...and the cited parental monzogranite. Keywords: columbite-tantalite group minerals; cassiterite; aplite-pegmatite; |  | Melleton, J., Gloaguen, E., Frei, D., Novak, M., Breiter, K. (2012) HOW ARE THE EMPLACEMENT OF RARE-ELEMENT PEGMATITES, REGIONAL METAMORPHISM AND MAGMATISM INTERRELATED IN THE MOLDANUBIAN DOMAIN OF THE VARISCAN BOHEMIAN MASSIF, CZECH REPUBLIC?. The Canadian Mineralogist, 50 (6) 1751-1773 doi:10.3749/canmin.50.6.1751 | Journal (article/letter/editorial) | | Université d'Orléans, ISTO, UMR 7327, F–45071 Orléans, France Dirk FREI¶ Stellenbosch University, Department...domain, 10 in situ U–Pb dates of minerals of the columbite–tantalite group from eight rare-element pegmatites...of radiogenic Pb is of minimal importance in columbite. Two ages of emplacement have been obtained. An...Keywords: LCT pegmatite, rare-element-enriched magma, columbite–tantalite, LA–SF–ICP–MS dating, Variscan orogeny...LA–SF–ICP–MS ont été réalisées sur des grains de columbite et de tantalite issus des différentes pegmatites |  | Roza Llera, Ana, Fuertes-Fuente, Mercedes, Cepedal, Antonia, Martin-Izard, Agustín (2019) Barren and Li–Sn–Ta Mineralized Pegmatites from NW Spain (Central Galicia): A Comparative Study of Their Mineralogy, Geochemistry, and Wallrock Metasomatism. Minerals, 9 (12) 739 doi:10.3390/min9120739 | Journal (article/letter/editorial) | | Presqueira body show a trend from columbite-(Fe) to tantalite-(Fe) and tapiolite-(Fe). In this body, the Li-aluminosilicate...Keywords: wallrock signature; Li–Sn–Ta pegmatite; columbite–tantalite; tantaliferous cassiterite; NW Spain...to the rare element class (beryl type, beryl–columbite–phosphate subtype, albite–spodumene type and albite...vanadinite (Cl), andradite (Ca), MnTi (Mn, Ti), magnetite (Fe), apatite (P,F), SnO2 (Sn), ZnS (Zn), AsGa (Ga),...almandine– spessartine solid solution with Mn/(Mn + Fe) ratios between 0.31 and 0.42. The most remarkable |
|
