 | | Report (issue) | | SURVEY NAMIBIA 1990 Open File Report MRS 12 2 Abstract Niobium-tantalum mineralisation in Namibia occurs...by-products of Tin-mining operations in central Namibia (Uis, Nainais, De Rust). Prominent niobium-tantalum...pegmatites occur in the Tantalite Valley in southern Namibia and have been mined for a long time on a small...pegmatites 2.1.1.1 Witkop pegmatite 2.1.1.2 White City pegmatite 2.1.1.3 Homestead pegmatite 2.1.1.4 Lepidolite...Lepidolite pegmatite 2.1.2 Sandfontein - Ramansdrift pegmatites 2 1 3 Aukam-Heigums pegmatites 2.2 Rare metal |  | | Journal (article/letter/editorial) | | phoshate mineral associations of the Tsaobismund pegmatite, Namibia Andr6-Mathieu Fransolet l, Paul Keller...one phosphate minerals occurring in the Tsaobismund pegmatite. This investigation is complemented by wet...alteration processes have been recognized in the Tsaobismund pegmatite: (i) the Mason-Quensel sequence results...B-4000 Li6ge 1 Introduction South West Africa, or Namibia, is well known for its numerous pegmatites located...Frommurze et al. 1942), with the description of the pegmatite bodies (Cameron 1955), and with the evolution |  | | Report (issue) | | MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY NAMIBIA I 1990 Open File Report MRS 05 2 Abstract A...wide variety of semi-precious stones occur in Namibia, namely amazonite, the beryl varieties, chrysocolla...the most important semi-precious stones found in Namibia. The major deposits of these semi-precious stones...Introduction Since the German colonial period Namibia has been well known for the occurrence of semiprecious...throughout Namibia. 1. AMAZONITE The most important occurrences of amazonite in Namibia are those in |  | | Journal (article/letter/editorial) | | Mg)2PO4F, occur in the late stage period of pegmatite evolution. Unfortunately, neither are the genetic...- Clementine II, Rubicon II and III, and Tsaobismund (Namibia); Hagendorf-Stid and Rabenstein (Germany);...can now also be used in the interpretation of pegmatite evolution, just like that of the triphylite series...genetic relationships, and for a discussion of pegmatite evolution in general. Firstly, detailed chemical...triphylite series, for the interpretation of pegmatite evolution (Fransolet et al. 1986; Keller 1988; |  | | Book | | Twyfelfontein 7 AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 , .,/, loringa tree ...station Garub near Aus Nature conservation, Erongo 16 Welwitschia, Goboboseb Mountains 17 ....Northwest Region including Damaraland The Central Namib Desertand Escarpment The Spitzkoppen The Erongo Mountains...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 |  | Guastoni, A., Nestola, F., Mazzoleni, G., Vignola, P. (2007) Mn-rich graftonite, ferrisicklerite, staněkite and Mn-rich vivianite in a granitic pegmatite at Soè Valley, central Alps, Italy. Mineralogical Magazine, 71 (5) 579-585 doi:10.1180/minmag.2007.071.5.579 | Journal (article/letter/editorial) | | stane›kite and Mn-rich vivianite in a granitic pegmatite at Soe' Valley, central Alps, Italy A. GUASTONI1... (Fe2+)3(PO4)28H2O, occurring in a granitic pegmatite at Soè Valley (central Alps, Italy) were characterized...documented in pegmatites. In the Soè Valley pegmatite, ferrisicklerite forms exsolution lamellae with...destabilization of Mn-rich almandine and biotite during pegmatite formation. Ferrisicklerite forms exsolution lamellae...EY WORDS : central Alps, Italy, Soè Valley, pegmatite, X-ray diffraction, microprobe, phosphates. Introduction |  | Vignola, Pietro, Gatta, G. Diego, Hatert, Frédéric, Guastoni, Alessandro, Bersani, Danilo (2014) On the crystal-chemistry of a near-endmember triplite, Mn2+2(PO4/sub>)F, from the Codera valley (Sondrio Province, Central Alps, Italy) The Canadian Mineralogist, 52 (2) 235-245 doi:10.3749/canmin.52.2.235 | Journal (article/letter/editorial) | | 106.16(2)°; space group I 2/a], from a granitic pegmatite exposed in the Codera Valley (Sondrio Province...triplite up to 5 mm in size, hosted in a granitic pegmatite dike, and in close association with fluorapatite...Lopes Nunes 1968); Tsaobismund, Namibia (Fransolet et al. 1986); Okatjimukuju, Namibia (Keller & Von Knorring...South Australia (Lottermoser & Lu 1997); Cañada pegmatite, Spain (Roda et al. 2004). Chemical analyses of...masses of triplite were collected from a granitic pegmatite dike located in the Codera Valley (Novate Mezzola |  | | Journal (article/letter/editorial) | | transformations of triphylite from the Nanping No. 31 pegmatite dyke, southeastern China CAN RAO1,*, RU CHENG...phosphates was investigated in the Nanping No. 31 pegmatite, southeastern China. Two types of triphylite were...lazulite, anapaite, ludlamite, Nanping No. 31 pegmatite, China. 1. Introduction Triphylite, Li(Fe,Mn)2þPO4...significance. The Nanping No. 31 pegmatite is a rare-element, well mineralized pegmatite from southeast China (Yang...(Yang et al., 1987; Rao et al., 2009). In this pegmatite, triphylite occurs in zones III (Na-metasomatic |  | | 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 |  | Dill, H. G., Melcher, F., Gerdes, A., Weber, B. (2008) THE ORIGIN AND ZONING OF HYPOGENE AND SUPERGENE Fe-Mn-Mg-Sc-U-REE PHOSPHATE MINERALIZATION FROM THE NEWLY DISCOVERED TRUTZHOFMUHLE APLITE, HAGENDORF PEGMATITE PROVINCE, GERMANY. The Canadian Mineralogist, 46 (5) 1131-1157 doi:10.3749/canmin.46.5.1131 | Journal (article/letter/editorial) | | NEWLY DISCOVERED TRUTZHOFMÜHLE APLITE, HAGENDORF PEGMATITE PROVINCE, GERMANY Harald G. DILL§ and Frank MELCHER...(THM) at the western border of the Hagendorf Pegmatite Province, Germany. We describe the sequence of...silicates. In contrast with the neighboring Hagendorf pegmatite, the magmatic and hydrothermal phosphate mineralization...des silicates de Sc. Contrairement au cas de la pegmatite de Hagendorf voisine, les assemblages magmatiques...Trutzhofmühle, at the western border of the Hagendorf Pegmatite Province, Germany, renowned for its mineral wealth |  | | Journal (article/letter/editorial) | | ASSEMBLAGE OF PHOSPHATE MINERALS, KIBINGO GRANITIC PEGMATITE, RWANDA ANDRÉ-MATHIEU FRANSOLET AND FRÉDÉRIC HATERT... ABSTRACT A sample from the Kibingo granitic pegmatite, Rwanda, shows a striking assemblage of an alluaudite-group...pegmatitic body differs from the amblygonite pegmatite of Mwaka and could be a poorly evolved neighboring...phosphate mineral assemblage, Kibingo granitic pegmatite, Rwanda. SOMMAIRE Un échantillon provenant de...littérature, le gisement de Kibingo ne serait pas la pegmatite à amblygonite de Mwaka, mais une lentille pegmatitique |  | | Journal (article/letter/editorial) | | with Li and Sn, which is in agreement with the pegmatite field zonation established in the literature....Distribution of the pegmatite groups recognized in the Fregeneda area (* numbers of pegmatite types as in Table...layers. Previous works on the description of the pegmatite bodies, their mineralogy and their petrogenesis...composed mainly of quartz, K-feldspar, muscovite and albite (T4) appear. In an intermediate zone, between the...pegmatites that consist of quartz, K-feldspar, albite and muscovite (T6) crop out. The pegmatites of |  | Vignola, P., Diella, V., Oppizzi, P., Tiepolo, M., Weiss, S. (2008) PHOSPHATE ASSEMBLAGES FROM THE BRISSAGO GRANITIC PEGMATITE, WESTERN SOUTHERN ALPS, SWITZERLAND. The Canadian Mineralogist, 46 (3) 635-650 doi:10.3749/canmin.46.3.635 | Journal (article/letter/editorial) | | PHOSPHATE ASSEMBLAGES FROM THE BRISSAGO GRANITIC PEGMATITE, WESTERN SOUTHERN ALPS, SWITZERLAND Pietro VIGNOLA§...graftonite–triphylite-bearing LCT-type granitic pegmatite in the Alps. In 1999, in the Brissago area, in...complete section of a phosphate-bearing pegmatite dike. The zoned pegmatite is composed by four main units: 1)...silicates indicate that this phosphate-bearing pegmatite dike belongs to a geochemically primitive system...Southern Alps. In this geodynamic environment, a pegmatite-forming melt formed after partial melting of metapelites |  | | Journal (article/letter/editorial) | | crystallized to form a group of intra-granitic pegmatite dykes, which are hosted by its outermost facies...fractures to form the Cruz del Rayo field of pegmatite dykes, which are hosted by pre-Ordovician low-grade...series. A strong albitization of the granitic and pegmatite rocks led to the replacement of the primary assemblage...interaction. Introduction SECONDARY granite and pegmatite phosphates have been extensively documented (e... LLORENS AND M. C. MORO aplitic bodies, the pegmatite dykes, and the mineralized intra-granitic quartz |  | | Book | | .,,., ..,,.... w + ..... . ·. .... . - Namibia Zauberwelt edler Steine und Kristalle ooa Dieses...Erdgeschichte 8 Zur Geschichte des Bergbaus in Namibia 17 Der Brandberg und die Mineralfunde in seiner...blaue Wunder vom Erongo - Auf Aquamarin-Jagd im Innern Namibias 72 Miarolen im Erongo-Granit- ein Eldorado...110 Auf Turmalinsuche in Namibia Die Demantoide von Tubussis in Zentral-Namibia 112 116 Sodalith von...bei Rössing l 19 Zeolithe vom Grootbergpaß in Namibia Kamphaugit-(Y) von der Rössing-Mine 120 124 126 |  | Roda-Robles, E., Galliski, M. A., Roquet, M. B., Hatert, F., de Paeseval, P. (2012) Phosphate nodules containing two distinct assemblages in the Cema granitic pegmatite, San Luis province, Argentina: Paragenesis, composition and significance. The Canadian Mineralogist, 50 (4) 913-931 doi:10.3749/canmin.50.4.913 | Journal (article/letter/editorial) | | TWO DISTINCT ASSEMBLAGES IN THE CEMA GRANITIC PEGMATITE, SAN LUIS PROVINCE, ARGENTINA: PARAGENESIS, COMPOSITION...are common in the outer core zone of the Cema pegmatite, San Luis Range, Argentina. Two different complex...enrichment observed in these phosphates, in a pegmatite that is not highly fractionated, could be explained...schorl, in the border and wall zones of this pegmatite. The crystallization of this silicate would have...depleted the activity of Fe in the remaining pegmatite-forming melt. Keywords: Fe–Mn phosphates, nodules |  | | Journal (article/letter/editorial) | | between 400 and 600C, during the first stages of pegmatite evolution [hühnerkobelite is not a valid species...alluaudite and ferrisicklerite from the Buranga pegmatite, Rwanda, without any replacement texture. This...(1989) re-examined the samples from the Buranga pegmatite, and observed three different primary parageneses:...size of the alluaudite grains from the Buranga pegmatite, which can reach 1 cm in length, is also a good...stable and crystallize from the first stages of pegmatite evolution to the latest oxidation processes. Since |  | Hawthorne, Frank C., Wise, Michael A., Černý, Petr, Abdu, Yassir A., Ball, Neil A., Pieczka, Adam, Włodek, Adam (2018) Beusite-(Ca), ideally CaMn22+(PO4)2, a new graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada: Description and crystal structure. Mineralogical Magazine, 82 (6) 1323-1332 doi:10.1180/mgm.2018.120 | Journal (article/letter/editorial) | | graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada: Description...graftonite-group mineral from the Yellowknife pegmatite field, Northwest Territories, Canada. It occurs...occurs in a beryl-columbite-phosphate rareelement pegmatite where it is commonly intergrown with triphylite-lithiophilite...crystal structure, Raman spectrum, Yellowknife pegmatite field, Northwest Territories, Canada. 2 Introduction...graftonite, ideally [Fe2+3(PO4)2], from a granitic pegmatite in New Hampshire. Beus (1950) reported a graftonite-like |  | | Journal (article/letter/editorial) | | GEOCHEMISTRY OF PHOSPHATES AND SILICATES IN THE SAPUCAIA PEGMATITE, MINAS GERAIS, BRAZIL: GENETIC IMPLICATIONS Maxime...Grand-Duché de Luxembourg Abstract The Sapucaia pegmatite is located in the well-known Eastern Brazilian...Minas Gerais, Brazil. Detailed mapping of the pegmatite body revealed five zones, showing distinct mineral...quartz core (Q). Phosphate masses found in the pegmatite contains two different assemblages: assemblage...observed, showing reactions between triphylite and albite to form montebrasite and garnet rims. These textures |  | Roda, Encarnación, Pesquera, Alfonso, Fontan, François, Keller, Paul (2004) Phosphate mineral associations in the Cañada pegmatite (Salamanca, Spain) : Paragenetic relationships, chemical compositions, and implications for pegmatite evolution. American Mineralogist, 89 (1) 110-125 doi:10.2138/am-2004-0114 | Journal (article/letter/editorial) | | Phosphate mineral associations in the Cañada pegmatite (Salamanca, Spain): Paragenetic relationships... chemical compositions, and implications for pegmatite evolution ENCARNACIÓN RODA,1,* ALFONSO PESQUERA...ABSTRACT The Cañada pegmatite (Salamanca, Spain), a Li-P-(Sn-Nb ± Ta)-bearing granitic pegmatite, is intruded...ferrocolumbite, and cassiterite, typical of an evolved pegmatite facies. As a result of the decrease of Mg, the...reflect contamination of marginal zones of the pegmatite by some type of reaction with the host gabbro |  | Baijot, Maxime, Hatert, Frédéric, Dal Bo, Fabrice, Philippo, Simon (2014) Mineralogy and petrography of phosphate mineral association from the Jocão pegmatite, Minas Gerais, Brazil. The Canadian Mineralogist, 52 (2) 373-397 doi:10.3749/canmin.52.2.373 | Journal (article/letter/editorial) | | PHOSPHATE MINERAL ASSOCIATIONS FROM THE JOCÃO PEGMATITE, MINAS GERAIS, BRAZIL Maxime BAIJOT, Frédéric...Grand-Duché de Luxembourg Abstract The Jocão pegmatite (or Cigana) is located in the well-known Eastern...mineral masses were collected from the dumps of the pegmatite: association I is composed of dendritic triphylite...intergrowths with silicate minerals (spessartine garnet or albite); association II forms blocky nodules of triph...genetic sequence, secondary phosphates, Jocão pegmatite, Brazil § E-mail address: fhatert@ulg.ac.be |  | | Journal (article/letter/editorial) | | significance of phosphates from the Fregeneda-Almendra pegmatite field, Central Iberian Zone (Spain and Portugal)...reflect compositional differences depending on the pegmatite type. The Fe/(Fe+Mn) ratio of phosphates tends...identified new phosphates and other types of pegmatite where phosphates are common (Roda et al. 2007)...Roda-Robles et al. Fig. 1 Distribution of the pegmatite types in the Fregeneda-Almendra area. Legend:...(i) barren pegmatites with quartz, K-feldspar > albite, muscovite, tourmaline ± andalusite ± garnet, (types |  | | Journal (article/letter/editorial) | | crystallization relative to the assemblage in the host pegmatite has been well established (Smeds et al., 1998)...current of 10 nA. The following standards were used: albite (Na), periclase (Mg), graftonite (P), wollastonite...from triploidite-beusite pairs at the Cross Lake pegmatite (Černý et al., 1998) and wolfeite and associated...reflected the geochemical characteristics of the host pegmatite. The authors pointed out the ‘‘remarkable adaptability...Evidence from Gamsberg supports previous studies on pegmatite- and meteorite-hosted graftonites that a simple |  | | Journal (article/letter/editorial) | | peraluminen, S-Typ Graniten in Verbindung. Die Pegmatite sind zoniert und besitzen einen inneren Quarzkern...fluid inclusion history and its implications for pegmatite emplacement and subsolidus history is given in...Investigated pegmatite 0 ~,~ 15 Kilometres Fig. 1. Simplified geological map of the Olary region showing...showing investigated pegmatite occurrences (after Olliver and Steveson, 1984) generally strongly deformed sedimentary...Pegmatites The Olary Block contains over 70 individual pegmatite bodies, some of which have been investigated (Brady |  | | Journal (article/letter/editorial) | | phosphate mineralization in the Hagendorf-Pleystein pegmatite province H. G. DILL1,*, B. WEBER2, A. GERDES3...Silbergrube Aplite (SA) in the Hagendorf-Pleystein Pegmatite District, near Waidhaus, Germany, is a mildly...SA differs from other aplitic mobilizates in the region in having a less well developed strain-related...the felsic aplitic-pegmatitic mobilizates in this region and is overprinted by an epithermal phosphate system...operating feldspar mine in the Hagendorf-Pleystein Pegmatite Mining * E-mail: dill@bgr.de DOI: 10.1180/minmag |
|
