 | | 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 |  | | 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unpublished.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 |  | 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 |  | 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 |  | | 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 .................................... |  | | 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 |  | | 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 |  | | 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 |  | | 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 |  | 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...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 |  | 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 |  | | Journal (article/letter/editorial) | | veinlets, mainly in a quartz core; columbite-tantalite occurs in solid solution with cassiterite, as...Crookshank discovered a lepidolite of 3.34% lithium oxide and 4.88% flourine in a pegmatite cutting the green...However, the incidence of cassiterite in a lepidolite pegmatite of Govindpal (18°42'N: 81 °54' E) in Bastar...are conglomerates, sandstones and limestones. Pegmatite occurrences Simple, unzoned, zoned, greisenised...and is an assemblage of quartz, feldspar and microcline. The intermediate and wall rock zone are frequently |  | Zhang, A. C., Wang, R. C., Hu, H., Zhang, H., Zhu, J. C., Chen, X. M. (2004) Chemical evolution of Nb-Ta oxides and zircon from the Koktokay No. 3 granitic pegmatite, Altai, northwestern China. Mineralogical Magazine, 68 (5) 739-756 doi:10.1180/0026461046850216 | Journal (article/letter/editorial) | | oxides and zircon from the Koktokay No. 3 granitic pegmatite, Altai, northwestern China A. C. ZHANG1, R. C...granitic pegmatite, Altai, northwestern China, is a strongly zoned rare-element granitic pegmatite, where...backscattered-electron (BSE) imaging. Columbite-tantalite and zircon occur in most textural zones, whereas...oxides and zircon in the Koktokay No. 3 granitic pegmatite may suggest that the outer zones crystallize under...conditions. The extreme enrichments of columbite-tantalite in Ta, and of zircon in Hf, as well as the occurrence |  | | Journal (article/letter/editorial) | | primary deposits, ilmenite, monazite, columbite-tantalite, zircon and wolframite are the chief by-product...are three types of tin deposits exposed in the region. The first is the pegmatites which contain minor...area of primary tin potential of the Phuket-Ranong region and suggested that SEAES 8/I-'4--T tin-mineralization...(1988) described systematically the granites of the region. GEOLOGY OF THE GRANITES The granites occur as...orthoclase and micro-perthite with small amounts of microcline. Plagioclase is oligoclase-andesine, commonly |  | | Report (chapter) | | area . Lucy pegmatite. Results of the drill program . ..... . .. . . . Artdon pegmatite Subsurface pegmatite..... . . ... . . Molly and Bendum claim s Deer pegmatite , West Hawk Lake. . . . . . . . . . . . . . ....Lake .. ... . . . ... ..... .. . . . . . Beryl pegmatite north of Telford. 7 7 9 9 12 12 12 15 16 17 17...statement 19 19 Pegmatite dykes in the Pointe du Bois area (Lac du Bois to east of Lamprey Falls) Lac...Lac du Bois pegmatite K-1 pegmatite . Lucky NO.3 pegmatite Pine claim , Winnipeg River 20 20 20 21 21 |  | | Journal (article/letter/editorial) | | 2010 Primary Nb-Ta minerals in the Szklary pegmatite, Poland: New insights into controls of crystal...minerals from the Szklary pegmatite includes columbite-(Fe), columbite-(Mn), tantalite-(Mn), stibiocolumbite...can be explained by the contamination of the pegmatite-forming melt by ultramafic and mafic wall-rocks...fluid. Keywords: Columbite-(Fe), columbite-(Mn), tantalite-(Mn), stibiocolumbite, stibiotantalite, holtite...fractionation trends, Szklary pegmatite, Lower Silesia, Poland Introduction A pegmatite dike hosted by serpentinite |  | Fei, Guangchun, Menuge, Julian F., Li, Yunqiang, Yang, Jiyi, Deng, Yun, Chen, Changsheng, Yang, Yufan, Yang, Zheng, Qin, Liye, Zheng, Luo, Tang, Wenchun (2020) Petrogenesis of the Lijiagou spodumene pegmatites in Songpan-Garze Fold Belt, West Sichuan, China: Evidence from geochemistry, zircon, cassiterite and coltan U-Pb geochronology and Hf isotopic compositions. Lithos, 364. 105555pp. doi:10.1016/j.lithos.2020.105555 | Journal (article/letter/editorial) | | constraints on the magmatic crystallization of the pegmatite suite and nearby plutonic granitoids has f precluded...muscovite albite granite, albite pegmatite Jo u and albite spodumene pegmatite give crystallization ages of...sources for the pegmatite and granite magmas. Cassiterite from albite spodumene pegmatite yields a concordia...magmatic crystallization age of the albite spodumene pegmatite. f Given the differences in magmatic ages and...and εHf(t) ranges between albite oo spodumene pegmatite and both the two-mica granite and the muscovite |  | | Journal (article/letter/editorial) | | e s , . . 551 551 .. "*'6Tllu:1-:i:*l: ::: Microcline. Graphic granite. Plagioclase. Muscovite. Biotite...Biotite. : 551 .).).t 553 554 .).).) Chlorite Lepidolite Garnet. Beryl Tourmaline. Apatite. Triplite ...GeNBnar, FnarunBs On the basis of occurrence the pegmatite minerals may be divided into three groups: o ...development of primary rock-forming minerals: qvartz, microcline, muscovite, and biotite. Other subordinate constituents...present at all, are small. fn the School Section pegmatite 1- to 6-inch vugs containing minute cleavelandrte |  | | Journal (article/letter/editorial) | | minerals and cassiterite from the Black Mountain pegmatite, Maine MICHAEL A. WISE* and CATHLEEN D. BROWN...Ta-,Sn-oxide minerals from the Black Mountain pegmatite has revealed the presence of discrete crystals...Key-words: cassiterite, columbite-group minerals, pegmatite, Black Mountain, Maine. 1. Introduction and...discrete, platy to blocky crystals in albite- and lepidolite-rich units and as rare microscopic grains hosted...hosted by cassiterite. The Black Mountain pegmatite is one of a few pegmatites in western Maine which contains |  | 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 |  | Xu, Zhiqin, Fu, Xiaofan, Wang, Rucheng, Li, Guangwei, Zheng, Yilong, Zhao, Zhongbao, Lian, Dongyan (2020) Generation of lithium-bearing pegmatite deposits within the Songpan-Ganze orogenic belt, East Tibet. Lithos, 354. 105281 doi:10.1016/j.lithos.2019.105281 | Journal (article/letter/editorial) | | of lithium-bearing pegmatite deposits within the Songpan-Ganze orogenic belt, East Tibet Zhiqin Xu, Xiaofan...of lithium-bearing pegmatite deposits within the Songpan-Ganze orogenic belt, East Tibet, LITHOS, https://...formed in the Songpan-Ganze orogenic hinterlands, East Tibet. The lithium pegmatites, hosted in the Upper... as indicated by ages of the lithium-bearing pegmatite veins and other mineralization ages. Therefore...lithium-bearing pegmatite deposits within the 2 Songpan-Ganze orogenic belt, East Tibet 3 4 Zhiqin |
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