 | | Journal (article/letter/editorial) | | from rare-metal pegmatites in South Africa and Namibia JoY R. BALDWIN Department of Geology, University...from rare-metal pegmatites in South Africa and Namibia have been investigated with the electron microprobe...microprobe. A uranmicrolite from Karibib, Namibia contained 14.35% UO2, 1.03% PbO, 56.12% Ta205, 13.18% Nb205...traverses across a 1.3 mm uranoan microlite, Tantalite Valley, Namibia, revealed two essentially distinct compositions:...manganotantalite, ferrotantalite, South Africa, Namibia, replacement. Introduction MICROLITE minerals |  | | Report (issue) | | SURVEY NAMIBIA 1990 Open File Report MRS 12 2 Abstract Niobium-tantalum mineralisation in Namibia occurs...niobium-tantalum pentoxides of the columbite-tantalite series, or as niobium-tantalum minerals of the...pyrochlore group. Minerals of the columbite-tantalite series are associated with rare metal pegmatites...by-products of Tin-mining operations in central Namibia (Uis, Nainais, De Rust). Prominent niobium-tantalum...mineralised pegmatites occur in the Tantalite Valley in southern Namibia and have been mined for a long time |  | | Book | | Mountainland The Central Northern to Northwest Region including Damaraland The Central Namib Desertand...Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and the Diamonds 44 49 241 254 272 275... Encyclopedia of the Mineralsof Namibia 443 Meteorites in Namibia Bibliography Index Photo credits...__ Republic of Namibia The President State House W°Ntdhoek FOREWORD Namibia is endowed with an...from near and far. Fine mineral specimen from Namibia are displayed in all the famous natural science |  | Novak, M., Cerny, P., Cempirek, J., Srein, V., Filip, J. (2004) FERROTAPIOLITE AS A PSEUDOMORPH OF STIBIOTANTALITE FROM THE LASTOVICKY LEPIDOLITE PEGMATITE, CZECH REPUBLIC; AN EXAMPLE OF HYDROTHERMAL ALTERATION AT CONSTANT Ta/(Ta + Nb) The Canadian Mineralogist, 42 (4) 1117-1128 doi:10.2113/gscanmin.42.4.1117 | Journal (article/letter/editorial) | | OF STIBIOTANTALITE FROM THE LAŠTOVIČKY LEPIDOLITE PEGMATITE, CZECH REPUBLIC; AN EXAMPLE OF HYDROTHERMAL...pseudomorphs after primary stibiotantalite from the lepidolite pegmatite at Laštovičky, western Moravia, Czech...alteration, Nb and Ta fractionation, lepidolite-bearing granitic pegmatite, Laštovičky, Czech Republic. ...pseudomorphose de la stibiotantalite primaire d’une pegmatite à lépidolite de Laštovičky, en Moravie occidentale...hydrothermale, fractionnement du Ta par rapport au Nb, pegmatite granitique à lépidolite, Laštovičky, République |  | Li, Jiankang, Liu, Congyu, Liu, Xiang, Li, Peng, Huang, Zhibiao, Zhou, Fangchun (2019) Tantalum and niobium mineralization from F- and Cl-rich fluid in the lepidolite-rich pegmatite from the Renli deposit in northern Hunan, China: Constraints of fluid inclusions and lepidolite crystallization experiments. Ore Geology Reviews, 115. 103187 doi:10.1016/j.oregeorev.2019.103187 | Journal (article/letter/editorial) | | Mineralization from F- and Cl-rich Fluid in the Lepidolite-rich Pegmatite from the Renli Deposit in Northern Hunan...Hunan, China: Constraints of Fluid Inclusions and Lepidolite Crystallization Experiments Li Jiankang, Liu...Mineralization from F- and Cl-rich Fluid in the Lepidolite-rich Pegmatite from the Renli Deposit in Northern Hunan...Hunan, China: Constraints of Fluid Inclusions and Lepidolite Crystallization Experiments, Ore Geology Reviews...Mineralization from F- and Cl-rich Fluid in the Lepidolite-rich Pegmatite from the Renli Deposit in Northern Hunan |  | | Report (issue) | | comprises a large part of the richest tin-mining region in Thailand and lies within the western belt of...Sampl es Pathfinder Minerals and Elements 65 14 Lepidolite 77 77 80 83 83 16 Diamonds Diamond Recovery...Appendix 3: Beneficiation tests on a sample of lepidolite-pegmatite from Reung Kiet, Thailand Index Figures...17 18 22 23 27 Figure I Locality map of south-east Asia Figure 2 Diagrammatic cross-section through...distribution of tin-bearing granite belts in south-east Asia Vlll Plates Page Figure 13 Distribution |  | | Journal (article/letter/editorial) | | feldspar-albite-muscovite, andalbiteK feldspar-lepidolite dikes.Petrogenetic studies indicatethatSnandNb-Tamineralization...extended frotn the late-magmatic stageto the pegmatite andpostmagmatic, hydrothermal stages of the KhaoTosaeSuite...cassiterite. In addition, discrete grainsof columbite-tantalite andmicrolite locallyoccur in thepegmatites. Wolframite...decreasing in abundance fromearlyto lategenerations of pegmatite dikes,anda distinctaccumulation of Sr andBain...andBain theotherwise mostfractionated lepidolite-rich dikes.Thepegmatites alsoprovide thefirstexample of Fe |  | | Book | | REPUBLIC OF NAMIBIA - MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY THE MINERAL RESOURCES OF NAMIBIA FIRST...ENERGY Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer of copper, lead, zinc, cadmium...unpublished. It is evident that mineral exploration in Namibia, as elsewhere. has changed from serendipitous discoveries |  | Černý, Petr, Masau, Morgan, Goad, Bruce E., Ferreira, Karen (2005) The Greer Lake leucogranite, Manitoba, and the origin of lepidolite-subtype granitic pegmatites. Lithos, 80 (1) 305-321 doi:10.1016/j.lithos.2003.11.003 | Journal (article/letter/editorial) | | Lake leucogranite, Manitoba, and the origin of lepidolite-subtype granitic pegmatites Petr Černýa,*,...non-crosscutting pods of barren, beryl-columbiteand lepidolite-subtype pegmatites that solidified from local...fractionation gradients characterize the granite-to-pegmatite transition, most conspicuously so in the case...evolved, Li, Rb, Cs, Be, Mn, Sn, Nb-Ta, F-rich, lepidolite-subtype pod AC #3 (with K/Rb z 16 and Cs 330...K-feldspar, z2.5 and V11,200 ppmwt, respectively, in lepidolite, Cs V28,000 ppmwt in beryl, and Ta/(Ta+Nb) at |  | | Journal (article/letter/editorial) | | DOI : 10.3749/canmin.48.2.375 MICROLITE AND TANTALITE IN THE LCT GRANITIC PEGMATITES OF LA CANALITA...oxide minerals, such as those of the columbite–tantalite group, tapiolite-(Fe) and microlite. It is possible...assemblage, formed of extremely Mn-rich columbite and tantalite, and microlite, the latter forming the host of...metasomatic fluids led to the formation of a lepidolite–albite late unit and the crystallization of a...a secondary assemblage consisting of tantalite-(Fe), tantalite-(Mn) and tapiolite-(Fe). Uranium-rich |  | 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) | | columbite–tantalite group from eight rare-element pegmatites, belonging to different pegmatite fields,...rocks. Keywords: LCT pegmatite, rare-element-enriched magma, columbite–tantalite, LA–SF–ICP–MS dating...été réalisées sur des grains de columbite et de tantalite issus des différentes pegmatites. Nos résultats... Mots-clés: pegmatite LCT, magmatisme à éléments rares, datation sur columbite–tantalite, technique LA–SF–ICP–MS...based on geochronological results (40Ar–39Ar on lepidolite and muscovite) obtained in the northern French |  | | Report (issue) | | Department of Industry and Resources 100 Plain Street EAST PERTH, WESTERN AUSTRALIA 6004 Telephone: (08) 9222...manganotantalite crystals from Moolyella, Pilbara region. Simpson Collection, Western Australian Museum............................................. 6 Tantalite minerals ................................................................................. 6 Tantalite indicators .............................................................................. 17 Lepidolite subtype .................................... |  | Martins, T., Lima, A., Simmons, W. B., Falster, A. U., Noronha, F. (2011) GEOCHEMICAL FRACTIONATION OF Nb-Ta OXIDES IN Li-BEARING PEGMATITES FROM THE BARROSO-ALVAO PEGMATITE FIELD, NORTHERN PORTUGAL. The Canadian Mineralogist, 49 (3) 777-791 doi:10.3749/canmin.49.3.777 | Journal (article/letter/editorial) | | Li-BEARING PEGMATITES FROM THE BARROSO–ALVÃO PEGMATITE FIELD, NORTHERN PORTUGAL Tânia MARTINS§ Geology...Portugal Abstract The Barroso–Alvão granitic pegmatite field, located in northern Portugal, is known...petalite-bearing bodies. Recent work on this pegmatite field characterized other types of pegmatites...mineral associations. Minerals of the columbite–tantalite group are found in all the LCT (Li–Cs–Ta) pegmatites... and lepidolite pegmatites. In the petalite and lepidolite pegmatites, the columbite–tantalite group |  | Brisbin, W. C., Eby, R. K., Corkery, M. T., Cerny, P., Chackowsky, L. E., Ferreira, K., Halden, N. M., Meintzer, R. E., Trueman, D. L. (2012) EXTREME FRACTIONATION AND DEFORMATION OF THE LEUCOGRANITE - PEGMATITE SUITE AT RED CROSS LAKE, MANITOBA, CANADA. III. DESCRIPTION OF SHEARING AND MYLONITIZATION TEXTURES IN THE LEPIDOLITE PEGMATITES. The Canadian Mineralogist, 50 (6) 1823-1838 doi:10.3749/canmin.50.6.1823 | Journal (article/letter/editorial) | | FRACTIONATION AND DEFORMATION OF THE LEUCOGRANITE – PEGMATITE SUITE AT RED CROSS LAKE, MANITOBA, CANADA. III...OF SHEARING AND MYLONITIZATION TEXTURES IN THE LEPIDOLITE PEGMATITES William C. BRISBIN and Ray K. EBY1...leucogranites and pegmatites populate the Red Cross Lake pegmatite field, located in the Red Cross Lake greenstone...alteration, the leucogranites and mainly the lepidolite pegmatites were subject to intensive shearing...mylonite-gneisses. Predominant movement within the sheared pegmatite has been dextral strike-slip with minor normal |  | | Journal (article/letter/editorial) | | Arbor, Michigan. Ansrnecr The Brown Derby No. 1 pegmatite, of Gunnison County, Colorado, contains a highly...muscovite, sericite, and five major varieties of lepidolite. Each of the micas was formed in a unit of characteristic...elements with respect to their positions in the pegmatite and probably with respect to relative time of...replacement layers formed by reactions between zonal pegmatite rock and deuteric, residual pegmatitic fluids...the Quartz Creek pegmatite district, is well exposedon the upper slopesof the east side of Quartz Creek |  | Wang, Zhen, Li, Jiankang, Chen, Zhenyu, Yan, Qinggao, Xiong, Xin, Li, Peng, Deng, Jingyi (2021) Evolution and Li Mineralization of the No. 134 Pegmatite in the Jiajika Rare-Metal Deposit, Western Sichuan, China: Constrains from Critical Minerals. Minerals, 12 (1) 45 doi:10.3390/min12010045 | Journal (article/letter/editorial) | | Evolution and Li Mineralization of the No. 134 Pegmatite in the Jiajika Rare-Metal Deposit, Western Sichuan...Evolution and Li Mineralization of the No. 134 Pegmatite in the Jiajika Rare-Metal Deposit, Western Sichuan...deposit in Asia, and the No. 134 pegmatite dike is the largest lithium pegmatite under mining conditions in...textures and minerals in the Jiajika No. 134 pegmatite, two zones (the barren Zone I and the spodumene...evolution and the cooling path of the Jiajika No. 134 pegmatite. From the outer zone inwards, grain size gradually |  | Fei, Guangchun, Li, Baohua, Yang, Jiyi, Chen, Xu, Luo, Wei, Li, Youguo, Tang, Wenchun, Gu, Chenghui, Zhong, Wei, Yang, Guibin (2018) Geology, Fluid Inclusion Characteristics and H-O-C Isotopes of Large Lijiagou Pegmatite Spodumene Deposit in Songpan-Garze Fold Belt, Eastern Tibet: Implications for ore Genesis. Resource Geology, 68 (1) 37-50 doi:10.1111/rge.12145 | Journal (article/letter/editorial) | | Characteristics and H–O–C Isotopes of Large Lijiagou Pegmatite Spodumene Deposit in Songpan–Garze Fold Belt,...discovered Lijiagou pegmatite spodumene deposit, is located southeast of the Ke’eryin pegmatite ore field, in...consist of medium- to coarse-grained spodumene, lepidolite, microcline, albite, quartz, muscovite, and accessory...accessory amounts of beryl, cassiterite, columbite–tantalite and zircon. Secondary fluid inclusions in quartz...long cooling period from the temperature of the pegmatite emplacement. Liquid–vapor–gas boiling was extensive |  | Černý, Petr, Chapman, Ron, Ferreira, Karen, Smeds, Sten-Anders (2004) Geochemistry of oxide minerals of Nb, Ta, Sn, and Sb in the Varuträsk granitic pegmatite, Sweden: The case of an “anomalous” columbite-tantalite trend. American Mineralogist, 89 (4) 505-518 doi:10.2138/am-2004-0405 | Journal (article/letter/editorial) | | Varuträsk granitic pegmatite, Sweden: The case of an “anomalous” columbite-tantalite trend PETR ČERNÝ...ABSTRACT The complex, petalite-subtype Varuträsk pegmatite in the Proterozoic rocks of northern Sweden is...is, as a whole, rather poor in Nb and Ta. The pegmatite consolidated in eight units, but the (Nb,Ta)-oxide...attained saturation levels only in a late albite + lepidolite-bearing unit under conditions of high activity...those typically displayed in pegmatites of the lepidolite subtype: from ferroan manganocolumbite [with |  | Melcher, Frank, Graupner, Torsten, Gäbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, Oberthür, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | Neoproterozoic (1000-542 Ma) TE 4.3.1. Kibara Belt (east-central Africa) 4.3.1.1. Radiometric data CE P...(western Zimbabwe) 4.3.3. Orange River Pegmatite Belt (Namibia, South Africa) AC 4.3.3.1. Radiometric...Radiometric data 4.4.3.2. Mineralogy 4.4.4. Damara Belt (Namibia) 4.4.4.1. Radiometric data 2 ACCEPTED MANUSCRIPT...Mineralogy NU 5. Mineral chemistry of columbite-tantalite, tapiolite, wodginite and ixiolite in African...3.2. Kamativi Schist Belt 5.3.3. Orange River Pegmatite Belt 5.4. Late Neoproterozoic to early Paleozoic |  | | Journal (article/letter/editorial) | | associations, were discovered in Afghanistan. The pegmatite fields are located mainly in the eastern part...the southeastern spurs of the Hindu Kush in the region of Nuristan. To a lesser degree, such pegmatites...the pegmatite processes axe manifested, and the very large dimensions of the individual pegmatite veins...the principal pegmatite fields have been concentrated is the late Cimmerian fold region of the Karakorum...and south by marginal faults (fig, 1). The fold region under consideration in Nuristan and Badakhshan |  | Aylmore, Mark G., Merigot, Kelly, Quadir, Zakaria, Rickard, William D.A., Evans, Noreen J., McDonald, Bradley J., Catovic, Enej, Spitalny, Peter (2018) Applications of advanced analytical and mass spectrometry techniques to the characterisation of micaceous lithium-bearing ores. Minerals Engineering, 116. 182-195 doi:10.1016/j.mineng.2017.08.004 | Journal (article/letter/editorial) | | mineralogy Mica Lithium deportment Liberation, pegmatite ToF-SIMS TIMA With the impetus for less reliance...samples (1.2–1.5% Li) examined is associated with lepidolite or zinnwaldite particle compositions which are...associated with minerals rynersonite and columbite-tantalite in some samples may be economic. The majority...solutions, high grade lithium-caesium-tantalum (LCT) pegmatite deposits and potentially in the future from Li-bearing...Libearing micas (polylithionite, trilithionite, lepidolite, zinnwaldite, 2.0–7.7% Li2O). Lithium micas most |  | Cerny, P., Halden, N. M., Ferreira, K., MEINTZER, R. E., Brisbin, W. C., Chackowsky, L. E., Corkery, M. T., Longstaffe, F. J., Trueman, D. L. (2012) EXTREME FRACTIONATION AND DEFORMATION OF THE LEUCOGRANITE - PEGMATITE SUITE AT RED CROSS LAKE, MANITOBA, CANADA. II. PETROLOGY OF THE LEUCOGRANITES AND PEGMATITES. The Canadian Mineralogist, 50 (6) 1807-1822 doi:10.3749/canmin.50.6.1807 | Journal (article/letter/editorial) | | FRACTIONATION AND DEFORMATION OF THE LEUCOGRANITE – PEGMATITE SUITE AT RED CROSS LAKE, MANITOBA, CANADA. II...enormous range of fractionation. The leucogranite + pegmatite assemblages, probably emplaced at ~2.65 Ma, represent...underwent extensive fractionation, culminating in the lepidolite pegmatites that solidified within the relatively...evolved LPG lepidolite-type pegmatites [with albite >> K-feldspar, K-, Rb- and Cs-dominant lepidolite, spodumene...enrichment and fractionation observed at the scale of pegmatite dikes down to local crystal-matrix levels. The |  | | Journal (article/letter/editorial) | | PEGMATITE Erste Österreichische Arbeitstagung Montanuniversität Leoben 11. April 2014 Zusammenfassung...Melcher MITT.ÖSTERR.MINER.GES. 160 (2014) PEGMATITE - ERSTE ÖSTERREICHISCHE ARBEITSTAGUNG von Johann...Montanuniversität Leoben die 1. Arbeitstagung zum Thema Pegmatite statt. Die Veranstaltung wurde vom Department...Geologie und Lagerstättenlehre) organisiert. Pegmatite sind sowohl aus wirtschaftlichen als auch wissenschaftlichen...hochgradiger Metamorphose gegenüber. Gerade die Pegmatite in den Ostalpen stellen ein Musterbeispiel für |  | | Journal (article/letter/editorial) | | the Brunswick pegmatite field and the Central Maine Synclinorium of the Oxford pegmatite field, in Maine...characteristics (e.g., Topsham area of the Brunswick pegmatite field). Significant chemical-compositional and...Brunswick and Oxford pegmatite fields. Columbite-group minerals from the Brunswick pegmatite field mainly consist...field carry columbite-(Fe), columbite-(Mn) and tantalite-(Mn) with low Ti and Mg contents. The structural...structural state of CGM from the Brunswick pegmatite field ranges from highly cation-disordered to cation-ordered |  | Groat, L. A., Mulja, T., Mauthner, M. H.F., Ercit, T. S., Raudsepp, M., Gault, R. A., Rollo, H. A. (2003) GEOLOGY AND MINERALOGY OF THE LITTLE NAHANNI RARE-ELEMENT GRANITIC PEGMATITES, NORTHWEST TERRITORIES. The Canadian Mineralogist, 41 (1) 139-160 doi:10.2113/gscanmin.41.1.139 | Journal (article/letter/editorial) | | ABSTRACT The Little Nahanni rare-element granitic pegmatite group (LNPG; ca. 82 Ma) in the western part of...of the Upper Proterozoic Hyland Group. These pegmatite bodies, up to a few meter wide, are divisible...K-feldspar, plagioclase, quartz, mica (muscovite to lepidolite), columbite-group minerals, cassiterite, tourmaline...spodumene-free pegmatites have more mica, particularly lepidolite, than the spodumene-bearing variety. Apatite...exist mainly in the intermediate zone of the lepidolite pegmatites, and § ¶ ‡ † E-mail address: lgroat@eos |
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