 | | Journal (article/letter/editorial) | | Pre-proof Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted...Soufi, Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted...Pre-proof Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: contrasted...In highly evolved F-rich felsic igneous rocks, topaz Al2SiO4(F,OH)2 forms in different genetic re stages:...deciphering the origin of OHâF variations in topaz. We conclude that topaz compositions in magmatic and post-magmatic |  | | Thesis/Dissertation | | Geosciences Mineralogy and petrology of the amazonite pegmatite at BakstevalĂĽsen, øvre Eiker Ăyvind Sunde...Sunde Mineralogy and petrology of the amazonite pegmatite at BakstevalĂĽsen, øvre Eiker Ăyvind Sunde Master...specimen of the amazonite pegmatite at BakstevalĂĽsen measuring a 15 cm cross-section with amazonite matrix and...imagined I would end up working with this exciting pegmatite. During my work you have given me free hands and... Abstract An exotic pegmatite classified as a rare-element gadolinite type amazonite pegmatite is situated in |  | | Journal (volume) | | (the mineral kanonerovite, from the Alabashka pegmatite field in the Middle Urals, is named for him) ...for perovskite; pit # 69, the original Russian amazonite locality; and pit #298 for star corundum. Oh ...into the Middle Urals - the Tokovaya emerald pits, topaz from Murzinka, and malachite, pseudomalachite and...other territories with such a complex picture of pegmatite development , which reflects a number of large-scale...1773. Later in 1777-1780, pegmatite veins with topaz, beryl, and amazonite were intensely developed by |  | | Journal (article/letter/editorial) | | Scandian Ixiolite, Pyrochlore and Bazzite in Granite Pegmatite in Tordal, Telemark, Norway. A Contribution to...February 15, 1988 Summary In Tordal granite pegmatite veins cut through a volcano-sedimentary sequence...cleavelandite-amazonite pegmatite occurring as a part of a larger network of granitic pegmatite veins. Alteration...Scandium, tin, beryllium, mineralogy, geochemistry, pegmatite Schliisselw6rter: Scandium, Zinn, Beryllium, Mineralogie...scandium-rich beryl bazzite in a cleavelandite-amazonite pegmatite vein in Tordal, Telemark, southern Norway |  | | Journal (article/letter/editorial) | | 1â17. Classification of Granitic Pegmatites and Pegmatite-Bearing Granitic Systems S. M. Beskina and Yu...paper discusses the concepts of pegmatitic rocks, pegmatite and pegmatoid bodies, and classification of granitic...amphibolite facies conditions, which correspond to pegmatite formation under medium pressure (e.g., Koktogai...Keywords: granitic pegmatite and pegmatoid, classification of pegmatites, amazonite pegmatite, albiteâ spodumene...spodumene granite, pegmatite-bearing granite system DOI: 10.1134/S1075701518070024 INTRODUCTION Granitic |  | | Journal (article/letter/editorial) | | postmiaskitic granitic pegmatites (including amazonite variety) in the Ilâmeny Mountains, may be considered...for the first time by Rose (1837) in granitic amazonite pegmatites with projecting tops of uniformly oriented...(1940), having analyzed the graphic structure of pegmatite, termed this type of intergrowths as Roseâs (R)...(Fig. 2). Judging from the diversity of graphic pegmatite patterns and different orientation of upgrown...edges of feldspar crystals. The quartzâalbiteâamazonite graphic structure, where quartz is dark smoky |  | | Report (issue) | | William "Skip" Simmons and Alexander Falster, pegmatite specialists from the University of New Orleans...pegmatites. Most ore beryl occurs in massive pegmatite zones where crystals may reach considerable size...can be found adjacent to the core margin of the pegmatite and in Suggested Chromophores for Beryl Color-generating...Meter long crystals have been found in Lemnis, Finland, where the largest known crystal is 1 meter long...the world's largest known beryl crystal is a pegmatite at Malakialina, Madagascar, which produced one |  | | Journal (article/letter/editorial) | | merkbart Be, Y og lantanider. Summary. A granite pegmatite of the type characterized by the elements lithium...made. The pegmatite is a cleavelandite-quartz-pegmatite replacing amazonite-pegmatite and occurs in...cleavelandite-pegmatite, but there are some remains of an earlier (magmatic) pegmatite: ordinary albite-pegmatite...albite-pegmatite with gadolinite and spessartite along the boundaries of the dike, and lumps of amazoniteÂ...amazonite pegmatite and fragments of gadolinite and spessartite in the interior of the cleavelandite-pegmatite |  | | Journal (article/letter/editorial) | | and small stocks of tourmaline granites. Six pegmatite fields, comprising Polmostundra, Kolmozero and...10â35 m in thickness. Quartz-albite-microcline pegmatite bodies are extremely enriched in rare element...Kolmozero-Voronja belt are comparable to those from giant pegmatite-hosted Li-Ta-Be deposits, i.e., Greenbushes, Wodgina...Kolmozero-Voronja belt (Figure 1) is represented by granite pegmatite but published geological data are not available...bodies (intragranite pegmatite, peralkaline granite pegmatite, amazonite pegmatite, metasomatically altered |  | | Journal (article/letter/editorial) | | with Various Fluorine-Bearing Minerals (Fluorite, Topaz, and Cryolite) V. S. Antipin, E. A. Savina, and...with various fluorine-bearing minerals (fluorite, topaz, and cryolite) was carried out. It was shown that...and agpaitic geochemical types. The fluorite-, topaz-, and cryolite-bearing granites of these geochemical...of various fluorine-bearing minerals (fluorite, topaz, and cryolite) and FâLi micas. The fluorine content...geochemical type. The possibility of fluorite, topaz, and cryolite crystallization from natural magmas |  | Raade, G., Ferraris, G., Gula, A., Ivaldi, G., Bernhard, F. (2002) Kristiansenite, a new calcium-scandium-tin sorosilicate from granite pegmatite in Tørdal, Telemark, Norway. Mineralogy and Petrology, 75 (1) 89-99 doi:10.1007/s007100200017 | Journal (article/letter/editorial) | | calciumÂąscandiumÂątin sorosilicate from granite pegmatite in TĂšrdal, Telemark, Norway G. Raade1 , G. Ferraris2...late hydrothermal mineral in vugs in an amazonite pegmatite at Heftetjern, TĂšrdal, Telemark, Norway....measured. Scandium enrichment in the Heftetjern pegmatite and the crystal chemistry of scandium are brieÂŻy...[Ca2ScSn(Si2O7)(Si2O6OH)] from the Heftetjern granite pegmatite in the TĂšrdal area (Telemark, Norway) brings the...nine. The extreme enrichment of scandium in this pegmatite is discussed below. The prospects of ÂŽnding other |  | Post, Jeffrey E., Wise, Michael A., Feather, Russell C., Pohwat, Paul W. (1998) The Smithsonian Institution's New Hall of Geology, Gems, and Minerals. Rocks & Minerals, 73 (1) 44-51 doi:10.1080/00357529809603060 | Journal (article/letter/editorial) | | Ruby. Two magnificent large topaz crystals and an almost 23,000-carat topaz gemstone, centrally located...consulting editor of Rocks & Minerals, specializes in pegmatite mineralogy at the Smithsonian Institution. His...His last article in Rocks & Minerals was titled âTopaz: A Mineralogical Reviewâ (January/February 1995)...Gallery featuring 106-pound quartz sphere, large topaz crystals (center), and about fifty other gem and...alcove. Topaz and tourmalines, on the other hand, are prominently displayed in the pegmatite alcove. |  | | Journal (article/letter/editorial) | | is found embedded in pale violet fluorite. In pegmatite vugs, milarite crystals up to 15 mm in length...have now been identified from the Heftetjern pegmatite, partly as fibrous intergrowths of areas exceeding...interesting and sensational new find in the Heftetjern pegmatite is certainly that of a new scandium mineral as...the Heftetjern pegmatite The most striking geochemical feature of the Heftetjern pegmatite, already noted...scandium as a major element are now known from the pegmatite: bazzite, cascandite, scandiobabingtonite, and |  | | Journal (article/letter/editorial) | | Scandium-bearing minerals from the Heftetjern-pegmatite, Tørdal, south Norway Roy Kristiansen At the...grey Sc-AI-silicate from the Animikie Red Ace pegmatite in Wisconsin,USA, by Falster et al. (1996); 3)...complete description of the mineralogy of the pegmatite is not provided except for an updated list of...the scandium mineralization in the Heftet jern pegmatite. TABLE 1. Scandium minerals of the world - in...History, geology and geochemistry of the Heftetjern-pegmatite in Tørdal The numerous granite pegmatites of the |  | Dolgopolova, Alla, Seltmann, Reimar, Kober, Bernd, Weiss, Dominik, Stanley, Chris, Dulski, Peter (2004) Geochemical characteristics and lead isotope systematics of highly fractionated LiâF-enriched amazonite granites and related host rocks of the OrlovkaâSpokoinoe mining district, Eastern Transbaikalia (Russia) Applied Earth Science, 113 (1) 83-99 doi:10.1179/037174504225004420 | Journal (article/letter/editorial) | | systematics of highly fractionated LiâF-enriched amazonite granites and related host rocks of the OrlovkaâSpokoinoe...granites of Khangilay to highly evolved ore-bearing amazonite granites of Orlovka. Khangilay and its derivates...different evolution stages. REE patterns of the amazonite granites of Orlovka show a stronger Eu anomaly...barren biotite granites to mineralised lepidoliteâamazoniteâalbite granites, layered pegmatitesâaplites and...Vol. 113 B83 Dolgopolova et al. LiâF-enriched amazonite granites and related host rocks of Eastern Transbaikalia |  | | Journal (article/letter/editorial) | | Murzinka, AduiâRezh, Ilmeny, Varlamovo, and other pegmatite fields and in syenite pegmatites of the alkaline...25 g in weight was found in muscoviteâfeldspar pegmatite of the Ilmeny Mountains in the beginning of the...the examined veins of granite pegmatite in the Adui pluton. Pegmatite veins: (1â2) miarolitic: (1) Semenin...(miarolefree) and gemstonebearing miarolitic gran ite pegmatite of the Adui pluton in the Central Urals and the...PEGMATITES OF THE ADUI PLUTON Many quartzâfeldspar pegmatite veins are local ized in granite of the Adui pluton |  | | Journal (issue) | | pneumatolitic, related to formatioĐż of ultrabasic pegmatite. The ruby crystals are rather large; their size...druse-bearing cavities; the pegmatite bodies are sitĐ˝ated directly in granites; - topaz-beryl chamber pegmatites...ĐŹite-mica zone, Đ°Đżd Đ° druse-bearing cavity -with topaz and beryl; the area of occurreĐżce of these pegmatites...pegmatites is observed not only for beryl, but also for topaz and tourmaline [9]. As Talantsev has noted, the...is observed in the spatial distribution of the pegmatite mineralization in the Murzinka massif from south |  | | Journal (article/letter/editorial) | | and microcline from these pegmatites. Primary amazonite pegmatites are to a large extent replaced by a...lepidolite, amazonite and mineral specimens for collectors (like cassiterite, beryl, topaz, gadolinite-(Y)...studied here come from the upper quarry. The pegmatite dike is here about 5 m thick with nearly E-W strike...the process of replacement of amazonite pegmatite by cleavelandite pegmatite in the Høydalen area have been...âEvidently a strong Y, REE signature of the whole pegmatite district persists through advanced fractionation |  | Zhu, Ze-Ying, Wang, Ru-Cheng, Marignac, Christian, Cuney, Michel, Mercadier, Julien, Che, Xu-Dong, Charles, Nicolas, Lespinasse, Marc (2019) Petrogenesis of Nbâ(Ta) aplo-pegmatites and fine-grained granites from the Early Cretaceous Huangshan rare-metal granite suite, northeast Jiangxi Province, southeast China. Lithos, 346. 105150 doi:10.1016/j.lithos.2019.105150 | Journal (article/letter/editorial) | | recurrent magma mixing. AC Keywords: Huangshan aplo-pegmatite; NbâTa oxides; multi-stage magma mixing; South...CuâAuâPbâZnâAg deposit; Wang et al., 2013). AlbiteâtopazâLi-mica RMGs, which are the main host for NbâTaâLiÂąBe...PT formed as early as the Kwangsian (Nanping pegmatite; ca. 420â390 Ma; Che et al., 2015), and were also... 1b). This suite comprises topazâzinnwalditeâK-feldspar granite and topazâzinnwalditeâalbite RMG, ED...prominent layers of black mica (Fig. 3a). The pegmatite crystals are 1.5 to 3.0 cm long, but some exceptional |  | | | | Triclinic titanite from the Heftetjern granitic pegmatite, Trdal, southern Norway A. J. LUSSIER1, M. A...sample of titanite from the Heftetjern granitic pegmatite, Tørdal, southern Norway, were extracted for structure...electron microprobe analysis, Heftetjern granitic pegmatite, Tørdal, Norway. Introduction TITANITE, ideally...Heftetjern granitic pegmatite, Tørdal, southern Norway. The Heftetjern pegmatite The Heftetjern cleavelandite-amazonite...cleavelandite-amazonite pegmatite, named after the small tarn Heftetjern, is situated in a marshy area between |  | | Report (edition) | | ............................. 69 Microcline (amazonite) .......................................................................... 71 Chapter 10 Topaz 73 Topaz properties ............................................................................ 73 Topaz in Western Australia...................................................... 78 Chapter 11 Minor pegmatite gemstones 79 Lepidolite .............................................................. 138 Southwest Western Australia ........................... |  | | Book (volume) | | GEMSTONES Diamond, Corundum (Ruby and Sapphire), Beryl, Topaz, Opal. IMPORTANT GEMSTONES The Feldspar Group, Spodumene...crystal . Four topaz crystals . Drawing of New Hampshire topaz crystal . A cut topaz . The Little Three...Three Mine . Drawing of Ramona Topaz crystal . View of Virgin Valley . An opal digging XI List of Illustrations...opal An amazonite crystal (color) An orthoclase crystal Map of Amelia, Va. An amazonite pegmatite Dr. George...plus one or more metals or other elements, e.g.: topaz (AI(F,OH).SiO,4), beryl (BezAl2(SiO3)¢), etc. Later |  | | Report (edition) | | ............................. 66 Microcline (amazonite)............................................................................ 70 Chapter 7 Topaz 71 Topaz properties............................................................................. 71 Topaz in Western Australia................................................. 76 vi Chapter 8 Minor pegmatite gemstones 77 Lepidolite............................................................... 144 Southwest Western Australia ........................... |  | | Book | | area excellent outcrops assistin the searchfor topaz, aquamarineand tourmaline. Apart from the minerals... forevvord Thenameof Namibia, the countryin the southwest of Africa,is takenfrom the Freiberg.Germanium...German South West Africa to Germany, including Topaz from the tain in Bethanien, fortheacquisition ofthe...Pomona Area. Reuningdiscovered the Hoffnungstrahl pegmatite attheRossing Mountain,sourceof the gemvarietyof...1965.His research die Wiiste". Hoffnungsstrahl Pegmatite in the Rossing included topicssuchascontinental |  | | Journal (article/letter/editorial) | | ďŹuorite and topaz deposits. . . . . . . . . . . . . . 30.4. Sedimentary ďŹuorite and topaz deposits . ...Tinzenite Tirodite TischendorďŹte Tlapallite Todorokite Topaz Torbernite Tourmaline, rubellite, indigolite, elbaite...into gemstones s.s. (diamond, precious corundum, topaz and emerald), semiprecious stones or gemstones s...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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