 | Smith, M.P., Moore, K., KavecsĂĄnszki, D., Finch, A.A., Kynicky, J., Wall, F. (2016) From mantle to critical zone: A review of large and giant sized deposits of the rare earth elements. Geoscience Frontiers, 7 (3) 315-334 doi:10.1016/j.gsf.2015.12.006 | Journal (article/letter/editorial) | | importance of a deposit may be related to the grade for individual, or a limited group of, the elements...total REE resource, only one currently known deposit (Bayan Obo) would class as giant (>1.7Ă107 tonnes contained...unclassified resource estimates from the Olympic Dam IOCG deposit, all of these deposits M AN U are related to...of some of the largest deposits AC C (e.g. Bayan Obo). Hydrothermal activity involving fluids from...Rare earth elements; Carbonatite; Syenite; Giant deposit; Grade 1. Introduction The rare earth elements |  | Benaouda, Rachid, Kraemer, Dennis, Sitnikova, Maria, Goldmann, Simon, Schwarz-Schampera, Ulrich, Errami, Abdellatif, Mouttaqi, Abdellah, Bau, Michael (2020) Discovery of high-grade REE-Nb-Fe mineralization associated with calciocarbonatite in south Morocco. Ore Geology Reviews, 124. 103631pp. doi:10.1016/j.oregeorev.2020.103631 | Journal (article/letter/editorial) | | zones, which contain bastnaesite and 20 pyrochlore-group minerals as the main REE and Nb ore minerals...the associated Fe-oxide 23 mineralization, pyrochlore and monazite-(Ce) are the main ore minerals occurring...Bastnaesite commonly forms prismatic aggregates whereas pyrochlore and 28 ceriopyrochlore usually display subhedral...REE-Nb-Fe, IOA, hydrothermal, epigenetic 41 deposit 3 42 1 Introduction 43 Critical metals such...Woolley and Kjarsgaard, 2008a, 2008b). Moreover, China and Brazil dominate the 50 market for REE and |  | Nedosekova, Irina, Vladykin, Nikolay, Udoratina, Oksana, Belyatsky, Boris (2021) Ore and Geochemical Specialization and Substance Sources of the Ural and Timan Carbonatite Complexes (Russia): Insights from Trace Element, RbâSr, and SmâNd Isotope Data. Minerals, 11 (7) 711 doi:10.3390/min11070711 | Journal (article/letter/editorial) | | signatures and ore specialization: Nb-deposits of pyrochlore carbonatites are associated with the IVC, while...moderately depleted mantle source for rocks and pyrochlore mineralization. The Buldym complex has a higher...carbonatites; SrâNd isotopes; NbâREE deposits; pyrochlore; bastnĂ€site; Urals; Timan Received: 28 May 2021...with carbonatites: Mountain Pass (USA) and Bayun-Obo (China) provide more than half of the world production...production of rare earth elements of the cerium group. Carbonatites are usually cogenetic with alkaline rocks |  | Franchini, M., Lira, R., Meinert, L., Rios, F. J., Poklepovic, M. F., Impiccini, A., Millone, H. A. (2005) Na-Fe-Ca Alteration and LREE (Th-Nb) Mineralization in Marble andGranitoids of Sierra de Sumampa, Santiago del Estero, Argentina. Economic Geology, 100 (4) 733-764 doi:10.2113/gsecongeo.100.4.733 | Journal (article/letter/editorial) | | apatite and late Ca-Fe-Mn carbonates ± monazite ± pyrochlore overprint and crosscut granite and comendite...mineral and occurs with minor ferrocolumbite, pyrochlore, strontiopyrochlore, and apatite associated with...Fe-LREE-Nb deposit Bayan Obo and other hydrothermal LREE deposits hosted in carbonatites of China. Introduction...carbonatites, particularly the large Bayan Obo deposit in China (Mariano, 1989a). Two districts with...Argentina (Fig. 1A): (1) The Rodeo de los Molles deposit, located in the Oriental Pampean Ranges of San |  | Macdonald, R., BagiĆski, B., Kartashov, P., Zozulya, D., DzierĆŒanowski, P. (2012) Chevkinite-group minerals from Russia and Mongolia: new compositional data from metasomatites and ore deposits. Mineralogical Magazine, 76 (3) 535-549 doi:10.1180/minmag.2012.076.3.06 | Journal (article/letter/editorial) | | 76(3), pp. 535â549 Chevkinite-group minerals from Russia and Mongolia: new compositional data from metasomatites...Electron-microprobe analyses of Russian and Mongolian chevkinite-group minerals from little-known host lithologies, including...metasomatic rocks, quartzolites and an apatite deposit, are presented. The mineral species analysed include...Compositional variation in the Sr-rich members of the group is broadly represented by the exchange vector (Fe...hydrothermal alteration. K EY WORDS : chevkinite group, electron microprobe, intra-crystalline variations |  | | Journal (article/letter/editorial) | | industries. Currently, mining and processing of REE is strongly concentrated in China. A substantial growth...(high-temperature) and secondary (low-temperature) deposit types. The most important primary deposits with...from China, with 40%â50% of this production contributed by the giant Fe-REE-Nb deposit at Bayan Obo [3...tons of Nb2 O5 and 470 million tons of iron. The deposit also contains an estimated 130 million tons of...hosts a deeply weathered and unexploited phosphate deposit, which is enriched in niobium (Nb), tantalum (Ta) |  | | Journal (article/letter/editorial) | | Occurrences of Niobium and Tantalum Mineralization in Mongolia Jaroslav Dostal 1, * and Ochir Gerel 2 1 2 *...Occurrences of Niobium and Tantalum Mineralization in Mongolia. Minerals 2022, 12, 1529. https:// doi.org/10...Technology, Baga Toiruu 34, Ulaanbaatar 14191, Mongolia Correspondence: jarda.dostal@smu.ca Abstract:...columbite-tantalite and pyrochlore-microlite groups are the most common Ta- and Nb-bearing minerals. In Mongolia, primary...mainly mineralization of Sn, W, Ta, Li, and Nb. Mongolia hosts several promising occurrences of both types |  | Chakhmouradian, Anton R., Reguir, Ekaterina P., Kressall, Ryan D., Crozier, Jeremy, Pisiak, Laura K., Sidhu, Ravinder, Yang, Panseok (2015) Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada): Mineralogy, geochemistry and petrogenesis. Ore Geology Reviews, 64. 642-666 doi:10.1016/j.oregeorev.2014.04.020 | Journal (article/letter/editorial) | | com/locate/oregeorev Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada): Mineralogy...Aley niobium deposit Carbonatite Metasomatic rocks Pyrochlore-group minerals Columbite-group minerals Fersmite...Stable-isotope composition a b s t r a c t The Aley Nb deposit in northern British Columbia, Canada, is hosted...Devonian. Primary Nb mineralization consists of pyrochlore (commonly comprising a UâTa-rich and F-poor core)...discrete crystals and replacement products after the pyrochlore. These phases and associated heavy minerals (apatite |  | | Journal (article/letter/editorial) | | in steel making and industrial modernisation in China, Russia and India as the cause of price spikes in...considered for potential coproduction of Ta and Nb. Pyrochlore (NbâTa), columbitetantalite (NbâTa), wodginite...% from tin slag refining and 10 % from secondary mine concentrates. Due to rapid industrialisation and...use of Nb in steel making in countries such as China and India, demand for Nb is rising. Weathered crusts...hard rock carbonatite deposit in Canada account for about 92 and 7 % of Nb world mine production, respectively |  | Dill, H. G., Melcher, F., FĂŒĂl, M., Weber, B. (2007) The origin of rutile-ilmenite aggregates (ânigrineâ) in alluvial-fluvial placers of the Hagendorf pegmatite province, NE Bavaria, Germany. Mineralogy and Petrology, 89 (3) 133-158 doi:10.1007/s00710-006-0140-x | Journal (article/letter/editorial) | | additionally have inclusions of ferrocolumbite, pyrochlore, betafite, sphalerite, pyrrhotite and Fe oxides...16 1.37 0.03 74.13 0.05 2.27 0.40 0.30 0.18 pyrochlore 7134=2 PingermuÌhle (Zottbach) 9 B1 1.178 ...032 0.005 0.004 0.002 0.201 0.002 0.001 0.007 pyrochlore 7134=2 PingermuÌhle (Zottbach) 9 B1 7 3.510...Location: Pflaumbach near Pleystein. c Bed load deposit of subrounded grains of nigrine (black) disseminated...exsolutions and inclusions of ferrocolumbite and pyrochlore. In subtype B2, Nb-, Fe- and V-rich rutile exsolves |  | | Journal (article/letter/editorial) | | MINERAL PARAGENESES Compositional Variations of Pyrochlore Group Minerals in Ongonite and Zwitter of the Verkhneurmiysky...Pluton, Russian Far East V. I. Alekseeva, * and Yu. B. Marina aSaint Petersburg Mining University, Saint...2017; accepted August 15, 2017 AbstractâThe pyrochlore-group minerals in ongonite and zwitter of the Verkhneurmiysky...Verkhneurmiysky granite pluton in the Badzhal district, Russian Far East are reported. The composition, genesis...rare species of pyrochlore, pyrochlore-I and pyrochlore-II in ongonite, and pyrochlore-III in zwitter |  | | Journal (article/letter/editorial) | | less than 100000 tons of Nb2Đ5 (including past mining, if it took place). The number of such objects...authors (Tkachev and Rundquist, 2016a, 2016b). DEPOSIT TYPES All niobium resources corresponding to the...nephelineâsyenite (Zozulya et al., 2007). In the former, pyrochlore is only of mineralogical interest, GEOLOGY OF...Tanbreez; (11) Motzfeldt; (12) Seis Lagos; (13) Bayan Obo; (14) Nemegosenda; (15) Luesh; (16) Bingo; (17)...31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 Deposit Nechalacho Pitinga Brockman Katugin Mount Weld |  | | Report (issue) | | gov/images/periodictable.pdf. Cover. Left, centimeter-size pyrochlore crystals from Uganda. Photograph by Gunnar Ries/CC-BY-SA-3..............................................M6 Deposit Types........................................................................................M24 Mine Waste Characteristics ........................................................................M27 Mine Closure ............................................M4 M4. Photographs showing centimeter-size pyrochlore crystals from Uganda, and a tantalite crystal |  | Vrublevskii, V.V., Bukharova, O.V., Nebera, T.S., Sveshnikova, V.L. (2019) Composition and origin of rare-metal (NbâTa, REE) and sulfide mineralization in magnesiocarbonatites from the Yenisei Ridge, Central Siberia. Ore Geology Reviews, 111. 102949 doi:10.1016/j.oregeorev.2019.102949 | Journal (article/letter/editorial) | | ancylite), as well as secondary phases (Sr-Ba pyrochlore, ferrocolumbite, fersmite, and Fe and Sr carbonates)...worldwide: Chernigov, Dubrava, and SiilinjĂ€rvi in the East European Platform; Ilmenâ Vishnevogorsk in the Urals;...Patti in Pakistan; Qinling orogen carbonatites in China (Puustinen, 1971; Glevasskii and Krivdik, 1981;...remarkable in bearing high-temperature apatite-group phosphates and rare-metal (NbâTa, REE) and sulfide... 3â5 vol. % magnetite, and minor pyrrhotite, pyrochlore, and other accessories (Lapin et al., 1987; Vrublevskii |  | | Book | | nearly all metals and the inevitable closing of many mining operations, it is a matter of the industry's survival...decision, not only is a handy volume affered to the mining and processing community but also duplication of...Ercit (with 21 Figures) . . . . . . 3 27 Pyrochlore Group Minerals from the Qaqarssuk Carbonatite Complex...The Bastnaesite-Fluorite-Barite Deposit of the Kizilcaören District, Eskisehir, Turkey. G. Morteani and...Granite-Hosted Tantalum Deposits: An Approach via District Analysis. P. 1. Pollard (with 1 Figure) . . . |  | Amores-Casals, , Melgarejo, , Bambi, , Gonçalves, , Morais, , Manuel, , Neto, , Costanzo, , Molist, (2019) Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in CarbonatitesâThe Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | reconstruct the dynamics of the complex, the pyrochlore composition and distribution have been used as...evolution of the complex. An early Na-, F-rich pyrochlore is disseminated throughout the carbonatite plug...dykes. Crystal accumulation led to enrichment of pyrochlore crystals in the plug margins, phoscoritic units...the crystallization of magmatic Na-, F- poor pyrochlore but progressively enriched in LILE and HFSE....processes and the formation of carbonatite breccia. Pyrochlore is the main Nb carrier in mingled carbonatites |  | Giebel, R. Johannes, Gauert, Christoph D.K., Marks, Michael A.W., Costin, Gelu, Markl, Gregor (2017) Multi-stage formation of REE minerals in the Palabora Carbonatite Complex, South Africa. American Mineralogist, 102 (6) 1218-1233 doi:10.2138/am-2017-6004 | Journal (article/letter/editorial) | | carbonatites and phoscorite (blue field) of the Loolekop deposit. Note: Main phases in bold, minor phases in plain...pit level (random samplingâupper 600 m of the deposit; Bulakh, personal communication) and provided only...for carbonatites and phoscorites of the Loolekop deposit. Detailed descriptions of REE minerals (marked...main calcite stage, Deposit item AM-17-66004, Supplemental Material and Table 2. Deposit items are free to...Ce-enriched, Nd-dominated end-member of this mineral group and is very rare compared to all other REE minerals |  | | Book (edition) | | Minerals that are listed as belonging to the same group are similarly closely comparable in composition...Cand CSPG Pennskiye gubemskiye wdomo.sti (Perm district ga=elle) Pl,ilosopl,ical Maga=ine Periodico de...Abernathyitc, K[(UO 2 )(AsO,)](HP) 3, tet., Fumerole No. 2 mine, Temple Mountain. on the southeast flank of the...'eltnerite, southern slopc of Mount Ochi, I 00 m east of Mil i ncar Karystos. Evvia. Grcccc, /1.'e»·Mi...104(3). 326-328 ⥠Achavnlitc, FcSe, hex .. Cacheuta Mine. Ccrro de Cacheuta. Sierra de Cacheuta. Mcndoza |  | | Journal (article/letter/editorial) | | Ce-anomalies (Ce/Ceâ 0.4â0.8, mean 0.6), corroded monazite group minerals with LREE-rich patches, and hydrated, Fe-...in Ce by fractional crystallization of cerian pyrochlore, percolated into the subvolcanic system and interacted...after their crystallization. Chevkiniteâ(Ce), pyrochlore, monazite and synchysite-bastnaesite, occurring...Eldalat) caldera volcano is situated on the western inner flank of the Kenya Rift Valley at the junction of...analytical files before the runs. Analyses were Group Samples SiO2-saturated syenites K1âK15, K17âK21 |  | | Journal (article/letter/editorial) | | Pannonian Basin; pyrochlore; xenolith 1. Introduction Niobium belongs to the group of incompatible high-field-strength...production is currently exploited from just one mine in Brasil [1]. A-type granites and genetically associated...minerals (FeâTi oxides, zircon, thorite, and pyrochlore) in the granite xenoliths from CÌamovce have...challenging task due to multiple interferences within the group of high-field-strength elements. A CAMECA SX-100...SX-100 electron probe interferences within the group of high-field-strength elements. A CAMECA SX-100 electron |  | | Journal (article/letter/editorial) | | dolomite, fluorapatite, phlogopite, amphibole, and pyrochlore. The carbonatite is separated from amphibole-fenite...magnesioarfvedsonite (overgrowth, crystal rim). Uranium-rich pyrochlore is metamict and ranges from calciopyrochlore...fenite. In breccia cement at nearby Fortune Lake, pyrochlore is associated with abundant fluorapatite but...petrogenesis at Fen, metamorphism has obscured pyrochlore zonation and enhanced amphibole growth at Meech...metamorphism, Meech Lake, Fen. INTRODUCTION Pyrochlore discovery in Gatineau Park In 1954, prospector |  | Starikova, Anastasia E., Bazarova, Ekaterina P., Savelâeva, Valentina B., Sklyarov, Eugene V., Khromova, Elena A., Kanakin, Sergei V. (2019) Pyrochlore-Group Minerals in the Granite-Hosted Katugin Rare-Metal Deposit, Transbaikalia, Russia. Minerals, 9 (8) 490 doi:10.3390/min9080490 | Journal (article/letter/editorial) | | minerals Article Pyrochlore-Group Minerals in the Granite-Hosted Katugin Rare-Metal Deposit, Transbaikalia...664033 Irkutsk, Russia School of Engineering, Far East Federal University, 8 Sukhanov st., 690091 Vladivostok...August 2019 Abstract: Pyrochlore group minerals are the main raw phases in granitic...granitic rocks of the Katugin complex-ore deposit that stores Nb, Ta, Y, REE, U, Th, Zr, and cryolite. There...%), ThO2 (to 1.8 wt.%), and PbO (to 1.4 wt.%). Pyrochlore of this type is very rare in nature and is limited |  | Monchoux, P., Fontan, F., De Parseval, P., Martin, R. F., Wang, R. C. (2006) IGNEOUS ALBITITE DIKES IN OROGENIC LHERZOLITES, WESTERN PYRENEES, FRANCE: A POSSIBLE SOURCE FOR CORUNDUM AND ALKALI FELDSPAR XENOCRYSTS IN BASALTIC TERRANES. I. MINERALOGICAL ASSOCIATIONS. The Canadian Mineralogist, 44 (4) 817-842 doi:10.2113/gscanmin.44.4.817 | Journal (article/letter/editorial) | | University, Nanjing, 210093, Peopleâs Republic of China, and Laboratoire de MĂ©canisme de Transfert en GĂ©ologie...chlorite, epidote, zircon, titanite, thorite, pyrochlore (s.l.), aeschynite-(Ce), ferrocolumbite, rutile...calciosamarskite. Likewise, the composition of pyrochlore (s.l.) shows a strong variation, from weakly...light-REE-enriched betafite and pyrochlore (Urdach) to Pb-, U-rich pyrochlore (s.s.) (EspĂ©chĂšre). The textures...corundum, zircon, thorite, strontian epidote, pyrochlore-group minerals, samarskite, ishikawaite, Urdach |  | | Journal (article/letter/editorial) | | Tantalum Mineralization in the Nechalacho REE Deposit, NWT, Canada Alexander Timofeevâ and A.E. Williams-Jones...tantalum mineralization in the Nechalacho rare metal deposit, Northwest Territories, Canada, which contains...and tantalum-bearing minerals in the Nechalacho deposit. Niobium-bearing zircon, columbite(Fe), fergusonite-(Y)...samarskite-(Y) were identified in the ore zones of the deposit, uranopyrochlore, and columbite-(Fe) were found...variations in the composition of the columbite group minerals as a function of location in the Nechalacho |  | | Journal (article/letter/editorial) | | oxides (minerals of the aeschynite, euxenite, pyrochlore and samarskite groups), compositional alteration...Biraya (Mills et al., 2012) in Russia; and Bayan Obo, China (Weilang, 1991). Formanite-(Y), the Ta-analogue...Ploskaya Mt, NW Russia (Voloshin et al., 2003); East Pilbara Shire, West Australia (Wylie, 1954); and...(Ruschel et al., 2010; Estrade et al., 2014); East Egypt (Sami et al., 2017; Abu Elatta, 2019); and...disseminated REE-Nb-U mineralization, such as the Salem deposit in Tamil Nadu, India (Nishimori et al., 1977; Roy |
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