 | Schaltegger, U., Ulianov, A., Muntener, O., Ovtcharova, M., Peytcheva, I., Vonlanthen, P., Vennemann, T., Antognini, M., Girlanda, F. (2015) Megacrystic zircon with planar fractures in miaskite-type nepheline pegmatites formed at high pressures in the lower crust (Ivrea Zone, southern Alps, Switzerland) American Mineralogist, 100 (1) 83-94 doi:10.2138/am-2015-4773 | Journal (article/letter/editorial) | | Science, Acad. G. Bonchev str., bl.24, 1113 Sofia, Bulgaria 4 Museo Cantonale di Storia Naturale, Viale Cattaneo...enriched, lithospheric mantle. Keywords: Miaskitic pegmatite, zircon megacrysts, U-Pb, planar fractures, southern...zircon-bearing miaskitic, alkaline pegmatite, while known occurrences linked to nepheline-syenite intrusions...were reported from leucogabbroic veins cutting phlogopite-bearing peridotite (Sills et al. 1983; Giovanardi...result from sudden volatile release in the host pegmatite and discuss whether they may have acted as diffusion |  | Xue, G., Marshall, D., Zhang, S., Ullrich, T. D., Bishop, T., Groat, L. A., Thorkelson, D. J., Giuliani, G., Fallick, A. E. (2010) Conditions for Early Cretaceous Emerald Formation at Dyakou, China: Fluid Inclusion, Ar-Ar, and Stable Isotope Studies. Economic Geology, 105 (2) 339-349 doi:10.2113/gsecongeo.105.2.339 | Journal (article/letter/editorial) | | Vietnam. Emerald mineralization is hosted by pegmatite and associated quartz veins that intrude deformed...those in fluid inclusions from other emerald occurrences documented by Roedder (1963, 1972, 1982). In...crust and generally higher concentrations in pegmatite, clays, black shale, and their metamorphic equivalents...unit, and northeast-southwest−trending felsic pegmatite veins (Fig. 4) dipping 15° to 30° toward northnorthwest...crosscutting the Proterozoic Mengdong succession. The pegmatite crosscuts the quartz veins indicating at least |  | | Journal (article/letter/editorial) | | cesium, a description of pegmatite paragenesis was given. The non-pegmatite occurrences of rare alkalies in...subject was ,,Mineral Inclusions." Asterism in phlogopite as caused by oriented inclusions of rutile was...as a photo-micrograph of rutile inclusions in phlogopite. Many other instances of mineral inclusions were...rose quartz, and chrysoberyl, and is, as with phlogopite, caused by oriented inclusions of various acicular |  | | Journal (article/letter/editorial) | | Eur. J. Mineral. 2001, 13, 15–26 Phlogopite exsolutions within muscovite: a first evidence for a highertemperature...ferro-aluminian phlogopite (Phl) within centimetre-size crystals of muscovite (Ms-matrix) from a pegmatite near...tri-octahedral phlogopite (Phl) / annite (Ann) (Monier & Robert, 1986c). Different occurrences of topotactic...Gresens & Stensrud, 1971) and from the Myo-ohage pegmatite (Tatekawa, 1975), or are the result of replacement...of nano- to micrometric topotactic domains of phlogopite in a pegmatitic muscovite suggest exsolution |  | | Report (issue) | | genesis and general economic potential of pegmatite occurrences in Greenland. Field observations, archive...presentation. The prospective areas for pegmatite-hosted mineral occurrences in Greenland are outlined, and examples...examples of prominent pegmatite minerals are demonstrated. Pink pegmatite related to the Qôrqut granite...unknown at present. In a broader sense, the term pegmatite is used for any coarse-grained vein of granitic...mica are used as industrial minerals. Several pegmatite mineral species may also be used as gemstones |  | | 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...grade metamorphics with granitoids Investigated pegmatite 0 ~,~ 15 Kilometres Fig. 1. Simplified geological...of the Olary region showing investigated pegmatite occurrences (after Olliver and Steveson, 1984) generally...extensive volumes of granitoids and scattered occurrences of dolerite dykes. Mapping and U-Pb zircon dating |  | | Journal (article/letter/editorial) | | MINERALOGY OF AN EVOLVED DICKINSON COUNTY, MICHIGAN, PEGMATITE. T. W. Buchholz1, A. U. Falster 2, W. B. Simmons2...(1961) documented approximately ninety known pegmatite occurrences in central Dickinson County in the Upper...Upper Peninsula of Michigan. A small beryl-rich pegmatite was investigated to describe its mineralogy and...determine its degree of geochemical evolution. The pegmatite is emplaced in Lower Proterozoic metamorphic rocks...probable that the pegmatite is late- to post-Penokean in age. Local control for pegmatite emplacement appears |  | | Journal (article/letter/editorial) | | determine chemical variations between different pegmatite types and within individual pegmatitic bodies...pegmatites of Froland is presented basing on the pegmatite structure, bulk composition and mineral chemistry...the most primitive composition and contain Fe phlogopite. Post-orogenic zinnwaldite pegmatites (< 0.93...varies significantly within structurally-zoned pegmatite bodies. Feldspar and biotite chemistry reflects...trace element signature of quartz. Key-words: pegmatite, quartz, LA-ICP-MS, cathodoluminescence, Froland |  | | Report (issue) | | garnet, spinel and topaz are known from scattered occurrences, but their potential has never been tested. The...Greenland geological environment, not least the pegmatite occurrence, is definite justification for more...pinkish diamonds from Garnet Lake. 2 Diamond occurrences in southern West Greenland . 53°W 52°W 51°W...Majuagaa dyke in this area is a diamond-bearing and phlogopite-poor ultramafic dyke, which is considered an...Mineral chemistry data for these occurrences, along with several occurrences in the Sarfartoq area, became |  | | Report (issue) | | contribution to the number of new minerals. The pegmatite deposit at Narsaarsuk (Narssârssuk) is in the...famous mineral location with- Famous mineral occurrences in Greenland As demonstrated since the early...Plenty of coarse-grained phlogopite on the surface of eroded ridges of phlogopite rich rocks in the alkaline...dk Key literature Appel, P.W.U. 1995: Ruby occurrences in the Petersen, O.V. & Johnsen, O. 2005: Mineral...A. 2008: & Thomassen, B. 1986: The mineral occurrences Pegmatites and their potential for mineral exploita- |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF THE UNITED STATES DAVID M. SEAMAN American Museum of Natural History, New York...found in all types of pegmatite from the common granite type to the lithium pegmatite. Many localities have...diameter have been noted in the School Section pegmatite of Fremont county, Colorado. ROCKS AND MINERALS...produced excellent gem tourmalines. The most noted occurrences in Maine are Mt. Mica at Paris, Mt. Apatite at...California has a large number of gem tourmaline occurrences in the pegmatites of San Diego and Riverside |  | | Report (issue) | | Minister J. E. Thomson, Director, Geological Branch Pegmatite Mineral Resources of Ontario By D. F. HEWITT.....l Pegmatite Mineral Production in Ontario (Table 1). . . . . .. . . . ... Number of Pegmatite Deposits... . . . . . .. . . .... . . ... . . . .. . 26 Phlogopite. . . . . .. . . ... .. . ... . . . . . . . ..... .. . .. . . 26 Properties of Muscovite and Phlogopite (Table 11)..... . . ... . . . . . . . . . ............. . .... ...... . 33 Character of the Pegmatite Dikes.... . . .. . . . ... . . . . . .... . . |  | | Journal (article/letter/editorial) | | o f his 80 th birthday Summary Vermiculite occurrences in the Bohemian Massif occur in peridoties--serpentinites...of the Gf6hl unit. Three types of vermiculite occurrences are discernible on the basis of rock assemblages...the second and third group is poor in Ca. The occurrences of vermiculite are of potential industrial interest...1) Vermiculit gebunden an leukokrate G~inge (Pegmatite, Plagioklasite) und ihre Reaktionss~iume, mit...Lower Austria almost monomineralic vermiculite occurrences have been discovered in reaction zones between |  | | Journal (article/letter/editorial) | | associated mineral zones in the hybrid ultramafic-pegmatite association of the neoproterozoic hafafit core...associated mineral zones in the hybrid ultramafic-pegmatite association of the Neoproterozoic Hafafit core...mineral zones are well developed when the granitic pegmatite veins cross-cut through ultramafic rocks at the...whereas the second group related to the pegmatite veins (pegmatite-related zones) comprises hercynite- and...zones. Tourmaline-rich zone only occurs when the pegmatite veins come in contact between ultramafic rocks |  | Chiarenzelli, Jeffrey, Lupulescu, Marian, Robinson, George, Bailey, David, Singer, Jared (2019) Age and Origin of Silicocarbonate Pegmatites of the Adirondack Region. Minerals, 9 (9) 508 doi:10.3390/min9090508 | Journal (article/letter/editorial) | | include albite, apatite, perthitic microcline, phlogopite, zircon, tourmaline, titanite, danburite, uraninite...collapse, voluminous leucogranite and granitic pegmatite intrusion, iron and garnet ore development, and...represent a continuum between vein-dyke and skarn occurrences involving the anatexis of metasedimentary country...Metasedimentary Belt of Ontario and Quebec, with similar occurrences in the Adirondack Mountains of northern New York...tectonic evolution of the region [2,3]. These occurrences are characterized by their intrusive nature and |  | | Journal (issue) | | Zlobin, V. E. Sonyushkin,and Yu. S. Tislov OCCURRENCES OF IRIDESCENT PLAGIOCLASE AT THE ANABAR SHIELD...SWEDEN 5 Cover 1. Hambeigite. Ranglad 'skoye pegmatite field, E. Pamirs. 8x 4 cm. Specimen:A.M. Skrigitil'...conducted here for gold, diamonds, platinum, phlogopite mica, and rare and dispersed elements. The first... P. Maksimov 191revealed rare-metal mineral occurrences in alkaline pegmatites of the massif and stated...in the exploration of a mica (vermiculite and phlogopite) deposit, which was situated i n this same massif |  | | Book | | (Austria), J. Komínek (Czech Republic), I. Bojkov (Bulgaria), H. Schleicher (Germany), W. Schuppan (Germany)...uranium districts, deposits, and noteworthy occurrences organized by countries. For the sake of comprehensiveness.... . . . . . . . . . 19 19 23 25 Chapter 2 Bulgaria . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . 3.3.2 Other Uranium Deposits/Occurrences in Central and Southwest Bohemia . . . . . ....Northwest Finland . . 5.6 Additional Uranium Occurrences in Finland . . . . . . . . . . . . . . . . |  | Novak, M., Skoda, R., Gadas, P., Krmicek, L., Cerny, P. (2012) Contrasting Origins of the Mixed (NYF + LCT) Signature in Granitic Pegmatites, with Examples from the Moldanubian Zone, Czech Republic. The Canadian Mineralogist, 50 (4) 1077-1094 doi:10.3749/canmin.50.4.1077 | Journal (article/letter/editorial) | | Li-bearing (lithium micas + elbaite) Kracovice pegmatite, with “amazonite”, samarskite and fergusonite...is the product of the strong fractionation of pegmatite-forming melt derived from the orogenic I-type...granite– pegmatite system of the Třebíč pluton and the mainly Li-bearing Kracovice pegmatite are typical...petrogenetic family. The contaminated elbaite-subtype pegmatite Bližná I, Český Krumlov Unit, with lithium tourmalines...contamination with Ca, Mg and REE of an evolved (LCT) pegmatite-forming melt by distal carbonatite-like marbles |  | | Journal (article/letter/editorial) | | Fe-rich tourmalines (schörl, foitite) in this pegmatite was in a final stage and therefore in this pegmatitic...Methods Tourmaline deposits in Afghanistan The pegmatite belt of the Hindu Kush Mts. is one of the largest...mineralization occurs in the numerous miarolitic pegmatite areas in several provinces in northeastern part...(2002) reported some of tourmaline-bearing pegmatite occurrences in which the tourmaline crystals were associated...others. The large REL-Li (rare earth elements-Li) pegmatite bodies (Černy & Ercit 2005) containing tourmalines |  | | Report (issue) | | documents and the National inventory of mineral occurrences suggests that resources of U, Th, Nb, Ta, Be...Richat carbonatite complex, but that all other occurrences of U, Th, REE, and associated elements are poorly....................................... 2 4.1.1 Pegmatite Veins of the Tasiast-Tijirit Terrane ............................................... 3 4.1.2 Pegmatite Veins of the Tamagot Window and the Northern Amsaga...principal greenstone belts and locations of pegmatite occurrences discussed in the text are shown ....... | | | Report (issue) | | documents and the National inventory of mineral occurrences suggests that resources of U, Th, Nb, Ta, Be...Richat carbonatite complex, but that all other occurrences of U, Th, REE, and associated elements are poorly....................................... 2 4.1.1 Pegmatite Veins of the Tasiast-Tijirit Terrane ............................................... 3 4.1.2 Pegmatite Veins of the Tamagot Window and the Northern Amsaga...principal greenstone belts and locations of pegmatite occurrences discussed in the text are shown ....... |  | | Journal (article/letter/editorial) | | are also probably of that age. The Strickland pegmatite at Portland, Connecticut, the near-by Hale deposit...Mountain pegmatite at Woburn, Massachusetts,are Devonian in age.7The famous Bedford pegmatite in WestchesterCounty...occur on Mount Royal, Montreal. Intrusions of pegmatite accompanied Paleozoic ore deposition in widely...Paleozoic granites of western Spain.12Tin-bearing pegmatite dikes in eastern Victoria cut the Silurian metamorphic...were formed through the action of pre-Cretaceous pegmatite dikes on Paleozoic (?) limestone.23The pegmatites |  | | Journal (article/letter/editorial) | | 2009 Tucson Gem & Mineral Show 1993) or their occurrences (Mandarino and Anderson 1989, for example), he...pseudomorphs, associations, traditional pegmatite occurrences such as the log-sized inclusions and intergrowths...Switzerland, and Arkansas; the giant apatite and phlogopite crystals from the Renfrew district, Canada; and...replaced by turquoise from Nevada; and numerous occurrences of mine timbers replaced by copper and even rarer...(Lausen 1928)? Why should there be terrestrial occurrences of native iron in masses weighing Volume 84, |  | | Conference Proceedings (Volume) | | modelling of the Nb-Ta-Sn mineralised Gatumba pegmatite field (Rwanda) .................................Hartmut Beurlen & Karel Breiter Contributions to pegmatite exploration within granitic plutons in central...and trace elements in Balkan bituminous coal, Bulgaria .. ............................................vegetation from the Maritza East Coal region, Bulgaria . . ............................................of crust of oceanic type contain small Co-Ni occurrences and giant chromite deposits but both of them |  | | Journal (article/letter/editorial) | | category of corundum-bearing anatectic felsic pegmatite formed in mantle peridotite earlier subjected...overprint by a mixed H2O + CO2 fluid. The bulk of the pegmatite bodies encountered are not obviously of anatectic...an LCT pegmatite also being affected by an LCT-type overprint, to form a “super-LCT pegmatite” is explored...economic potential of pegmatite occurrences. Keywords: granitic pegmatite, felsic pegmatite, classification...+ CO2. En revanche, la plupart des venues de pegmatite sont le produit du fractionnement d’un volume |
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