 | | 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unpublished.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 |  | 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 (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 |  | | Report (issue) | | Pegmatite Investigations 1942-1945 Black Hills, South Dakota By LINCOLN R. PAGE and OTHERS GEOLOGICAL...57 Prospecting for spodumene, amblygonite, and lepidolite ________ ______:.___-_____-_______-_-_ 57 Tantalum...mica claim.__________________________ Pleasant Valley mine by J. W. Adams and Peter Joralemon ______...pocket] PLATE 1. Index map showing locations of pegmatite mines and prospects. 2. 3. 4. 5. 6. 7. 8. 9....Dakota. Geologic map and sections Beecher Lode pegmatite, Ouster County, South Dakota. Geologic map and |  | | 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...Alkali feldspar phenocryst which is orthoclase or perthite is smaller than 20mm, averaging 10mm. Plagioclase |  | | Report (issue) | | Principal types of pegmatite Graphic granite Other very coarse-grained pegmatite Pocket pegmatite Fine-grained...pegmatites ECONOMIC FEATURES OF THE PEGMATITE MINERALS Lithium minerals Lepidolite Spodumene and amblygonite...of the Pala district, showing distribution of pegmatite dikes and principal mines and prospects Geologic...Photo showing wall zone and very coarse-grained pegmatite .4, Photo of matrix specimen from a gem-hearing...cut-stones A, Photo of fine-grained lepidolite. B, very fine-grained lepidolite 13. 45 45 45 46 46 47 47 48 |  | 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 |  | Černý, P., Teertstra, D. K., Chapman, R., Selway, J. B., Hawthorne, F. C., Ferreira, K., Chackowsky, L. E., Wang, X.-J., Meintzer, R. E. (2012) Extreme fractionation and deformation of the leucogranite-pegmatite suite at Red Cross Lake, Manitoba, Canada. IV. Mineralogy. The Canadian Mineralogist, 50 (6) 1839-1875 doi:10.3749/canmin.50.6.1839 | Journal (article/letter/editorial) | | FRACTIONATION AND DEFORMATION OF THE LEUCOGRANITE – PEGMATITE SUITE AT RED CROSS LAKE, MANITOBA, CANADA. IV...leucogranites and pegmatites populate the Red Cross Lake pegmatite field, located in a greenstone belt of the Sachigo...leucogranites is lithiumenriched, and the most evolved lepidolite-rich pegmatites represent the most fractionated...of granitic differentiation known to date. The lepidolite pegmatites consist mainly of albite, quartz and...and muscovite to K-, Rb- or Cs-dominant lepidolite, subordinate Rb-rich K-feldspar and spodumene + quartz |  | | 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) | | 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 |  | | 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 (volume) | | spodumene, petalite, quartz, albite, microcline and lepidolite. All pollucite bodies (> 5 cm) contain fine veins.... . .. ...... . ... . ..... . . . The parent pegmatite .... .. .... .. .......... ... ........ . ...... . . . ... ... . ..... . ...... . The parent pegmatite .. ... . . ......... .... . ...... .... . . ......... . .. . . ............ . . . The parent pegmatite ............... ...... . . ................ .... ....... ... . . ... .. . . . . . The parent pegmatite .............. . . .... ... . ............... |  | | Journal (article/letter/editorial) | | 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 ...present at all, are small. fn the School Section pegmatite 1- to 6-inch vugs containing minute cleavelandrte...Oligoclase Albite Muscovite Biotite Chlorite Lepidolite Garnet Beryl Tourmaline Apatite Triplite Fremontite...shadesof red and brown. fn the McMullin Lease No. 2 pegmatite the core quartz is banded by alternating milky |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF ONTARIO AND QUEBEC Hucn S. SrnNcp,Mines Branch.Ottawa.Canada.l INTRODUCTORY Pegmatitesoccur...occur abundantly throughout practically the entire region of the Pre-Cambrian crystalline rocks of eastern...Canada, from Hudson strait and Labrador, in the east, to the Rainy river district, in western Ontario...tin- and tungsten-bearingpegmatites. fn the Ottawa region, throughout a broad belt stretching from the Libvre...scattered outlying localities in the same general region, there occurs a series of molybdenite-bearing pegmatites |  | | Report (issue) | | Gemstone Paradise Publisher Lapis International LLC, East Hampton, CT Editors Dr. Miranda D. Jarnot, Annandale...B. Simmons, New Orleans, LA Gloria A. Staebler, East Hampton, CT Layout Designer Maximilian Glas, Starnberg...Christian Weise Verlag Munich, Germany P.O Box 263, East Hampton, CT 06424 USA Phone l -860-267-1512, Fax...Antsongombato Gem Mine Alpine Veins Page 74 The Vohemar region; The titanite pocket of February 1998; The future...Mananjary 19, 64 Manapa 55 Mandoto 48 Mandrare Valley 32 Mandrosonoro 62 Mangatobangy 80 ff Manjaka 52 |  | | Report (edition) | | Department of Mines and Petroleum 100 Plain Street EAST PERTH, WESTERN AUSTRALIA 6004 Telephone: +61 8 9222............................................... 21 East Kimberley Diamond Province.................................................................... 24 East Kimberley Diamond Province........................................................ 32 Marble Bar region ........................................................................................ 36 Cue region .............................................. |  | | Report (edition) | | Department of Mines and Petroleum 100 Plain Street East Perth WA 6004 Phone: (08) 9222 3459 Fax: (08) 9222... FRONTISPIECE Tiger iron from the Ord Ranges, Pilbara region, displaying folded bands of dark brown hematite...Department of Mines and Petroleum 100 Plain Street EAST PERTH, WESTERN AUSTRALIA 6004 Telephone: +61 8 9222...eye jasper from the Mount Brockman area, Pilbara region. The sphere, approximately 35 cm in diameter, contains............................................... 15 East Kimberley diamond province .................... |  | | Book | | Associated with the Drammen Granite in the Oslo Region, Norway... . . . . . . . . . . . . . . . . . ....Scottish Universities Research and Reactor Centre, East Kilbride, Glasgow, Scotland, UK .. vu Metallization...Newfoundland, Canada A 1B 3X5 Y. Mineral Resources Region 1, Songkhla, Thailand TRANGCOTCHASAN R. TR0NNES...the behaviour of the eruptives in the Cornubian region and those of the Bolivian tin belt (Halls et al...identity of this 'western lobe' is emphasized by the valley of the River Fal which cuts through the granite |  | Dill, Harald G., Weber, Berthold, Melcher, Frank, Wiesner, Werner, Müller, Axel (2014) Titaniferous heavy mineral aggregates as a tool in exploration for pegmatitic and aplitic rare-metal deposits (SE Germany) Ore Geology Reviews, 57. 29-52 doi:10.1016/j.oregeorev.2013.08.023 | Journal (article/letter/editorial) | | is +0.85 and around 1 km from the rare-element pegmatite RNb–Ti stands at +0.92. “Nigrine” and “antinigrine”...well entrenched in the literature as “perthite” and “anti-perthite”. In the current situation, if rutile...remnants of the former coherent nappe) such as the region between Teplá-Domažlice in the Czech Republic,...and Faragher, 1994). It has to be noted that the region under consideration is intersected by deep-seated...at the western edge of the Hagendorf–Pleystein pegmatite province are not shown on this map for reasons |  | | Book | | the 18th Antiquity in Beryl the Ancient 4 East, 9 Analysis, 11 Physical 50 Haiiy and His...Mongolian 507 Sudan, 508 456 Italy, 456 Kenya, (Namibia), 501 507 Spain, 445 Greenland, India, 500...discouragingly on of events scientific-geological the region inwas and mineral- feasibility of working profit...India. modern reported by network of via Near East, Mediterranean, and in to out to be emeralds...aquamarines the as type in discovery could have region stated unequivocally the been found in Antiquity |  | | Book | | the same passion for minerals and the NE Bavarian region. The Oberpfalz was his home and my adopted country...the principal techniques of deep geophysics, this region enables us to look at the origin of pegmatites...quartz at the core of the pegmatite is concerned. In comparison with other pegmatite deposits in the area...area, however, the Hagendorf-Pleystein Pegmatite Province (HPPP) is not only the largest concentration of...everything has been told about this prominent pegmatite. Professor Strunz was a generous and open-minded |  | | Journal (article/letter/editorial) | | Lawsonite Lazulite Lazurite Leonite Lepidocrocite Lepidolite Leucite Libethenite Linneite Lithiophilite Lithiophorite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...consisting essentially of quartz, antiperthite (or perthite), orthopyroxene (usually hypersthene) and magnetite...biotite, perovskite, apatite, calcite, and oxides. Pegmatite is a very coarse-grained igneous rock with a grain...syenite Nephelinite Norite Novaculite Okaite Pegmatite Pelite Peridotite Phonolite Phoscretes Phosphorite | | | Journal (article/letter/editorial) | | Lawsonite Lazulite Lazurite Leonite Lepidocrocite Lepidolite Leucite Libethenite Linneite Lithiophilite Lithiophorite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...consisting essentially of quartz, antiperthite (or perthite), orthopyroxene (usually hypersthene) and magnetite...biotite, perovskite, apatite, calcite, and oxides. Pegmatite is a very coarse-grained igneous rock with a grain...syenite Nephelinite Norite Novaculite Okaite Pegmatite Pelite Peridotite Phonolite Phoscretes Phosphorite |
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