 | | Journal (volume) | | . . . . . . . . . . . . . . . . . 14 PEGMATITE OCCURRENCES . .. .. . ...............................18 THE PEGMATITE OCCURRENCE OF LUOLAMÄKI . . . . . . . . . . . . . . . . . . . 19 PEGMATITE OCCURENCES...to occur in connection with synorogenie rocks. Pegmatite dikes and lumps containing beryl are found mostly...coarse-grained varieties of granite, i.e., pegmatite occurrences. It was in 1956 that the Geological Survey...Finland undertook to investigate and map out pegmatite occurrences as part of its systematic work program. |  | 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...829 ± 10 Ma from two igneous units within the plagioclase-rich gneiss of the Nanyantian unit. These dates...(Hodges and Spear, 1982) and garnet-biotite-plagioclase (Hoisch, 1991) thermobarometers, the regional |  | | 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) | | Tools and Workflows for Grassroots Li–Cs–Ta (LCT) Pegmatite Exploration Benedikt M. Steiner Camborne School... This paper reviews the main controls of LCT pegmatite genesis relevant to mineral exploration programs...as industrial mineral deposits. Keywords: LCT; pegmatite; lithium; exploration; targeting 1. Introduction...decades research into rare metal Li–Cs–Ta (LCT) pegmatite mineralisation has predominantly focused on the...mineral exploration techniques applied to LCT pegmatite mineralisation have been published, covering (i) |  | | Report (issue) | | ................ K-Feldspar................ Plagioclase............... Quartz.................... Accessory...Level........................... Past/Potential Pegmatite Commodities..................... Potassium Feldspar...Pegmatites.... Pegmatite Generation Processes............. "Ideal" Pegmatite Zoning.. Current Pegmatite Classifications........ PROPOSED PEGMATITE FIELDS............................... PEGMATITE OCCURRENCES..................... 93 Occurrences............... 93 Carlow and Herschel Townships.......107 Minor Occurrences....107 |  | | Journal (article/letter/editorial) | | Mineralogische und geochemische Untersuchung einiger Pegmatite aus der Gegend yon Mashad, Nordost-Iran In einer...Minerale Beryll und Cotumbit wurden beobachtet. Die Pegmatite dieser Gegend k6nnten sich folglich als potentielle...Introduction There are only a few k n o w n pegmatite occurrences in Iran and there is practically no i n...much restricted. More than a hundred samples of pegmatite from different localities of the Mashad area have...internal standards. Geological Setting The pegmatite occurrences in the Mashad area are part of a granite |  | | 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) | | e-perthite core that constitutes most of the pegmatite. Cross-cutting, fine-grained, quartz-albitesp...quartz-albitespodumene-muscovitelensesare found within pegmatite cores. The bulk mineralogy and variations in the mineralogy...this type are known in many areas: the Mateen pegmatite of the Black Hills, South Dakota; certain pegmatitesof...pace-and-compass mappingof the area of pegrnatite occurrences (Fig. 3); (3) diamonddrillinganddetailedsampling...Waldoborogranitescrop out east and west of the pegmatite occurrences. Pe•obscotFormation.--The Penobscotformation |  | | Report (chapter) | | granodioritic augen gneisses consist of 40-50% plagioclase, 20-30% quartz, 10-25% greenish-brown biotite...original plagioclase megacrysts completely recrystallized either to granular aggregates of plagioclase and...2 mm across. Typical examples contain 30-35% plagioclase, 20-25% quartz, 25-30% biotite, and around 10%...granodiorite augen gneiss containing quartz, plagioclase, K-feldspar, biotite, and epidote, and yielded...enclosing dyke. The sheet consists mainly of plagioclase, quartz and biotite and has a mean grain size |  | | 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...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...common pegmatite minerals quartz, feldspar and mica. The chemistry of quartz in the Froland pegmatite field |  | | Journal (article/letter/editorial) | | coarse-grained muscovite, quartz, microcline and minor plagioclase, and an outer border zone of fine- to medium-grained...medium-grained microcline, quartz, plagioclase and muscovite. The zones contain abundant beryl and F-apatite...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 |  | 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...megacrysts found in miaskitic (zircon, biotite, plagioclase-bearing) nepheline syenite pegmatites from the...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...result from sudden volatile release in the host pegmatite and discuss whether they may have acted as diffusion |  | | Journal (article/letter/editorial) | | decrease by an order of magnitude in the course of pegmatite formation down to complete disappearance in late...the intensity of radiation band 400–420 nm in plagioclase. DOI: 10.1134/S1075701507070124 INTRODUCTION...pegmatites as bands with maximums at 405 nm in plagioclase and at 392 nm in microcline. The presence of...al., 2002). The XL spectra of ~600 samples of plagioclase and ~200 samples of K-feldspar from pegmatites...extensive initial data. For the XL spectra of plagioclase, there are the following radiation bands with |  | | Report (volume) | | -----------------------Uranium-bearing lode occurrences ____ ----___________________________ 7 7 11...claims___ ______ __ __ _______________ Other occurrences in Lemhi County______________________ Camas district...CountY---------------------------------------Pegmatite occurrences______________________________________..._____________________________ Miscellaneous occurrences-Mosquito Bay area_______________ Other properties...Uranium-bearing lode occurrences-Continued Washington-Continued Veins and veinlike occurrences-Continued Leonard's |  | Rajesh, H.M., Knoper, M.W., Belyanin, G.A., Safonov, O.G., Schmidt, C. (2020) Petalite postdating spodumene in pegmatite as a consequence of the ~2.02 Ga meteorite impact in the Vredefort structure, southern Africa. Lithos, 376. 105760pp. doi:10.1016/j.lithos.2020.105760 | Journal (article/letter/editorial) | | Journal Pre-proof Petalite postdating spodumene in pegmatite as a consequence of the ~2.02 Ga meteorite impact...Belyanin, et al., Petalite postdating spodumene in pegmatite as a consequence of the ~2.02 Ga meteorite impact... Journal Pre-proof Petalite postdating spodumene in pegmatite as a consequence of the ~2.02 Ga meteorite impact...spodumene and petalite crystallize na from the pegmatite melt, depending on pressure and temperature. This...Keywords: petalite; spodumene; rare-element granitic pegmatite; meteorite impact; Vredefort na 1. Introduction |  | | Journal (article/letter/editorial) | | recognized, olivine-clinopyroxene pegmatite and Fe-Ti oxide pegmatite. With increased stratigraphic height...in Fe-Ti oxides. Thus, olivine-clinopyroxene pegmatite is prevalent in the Upper Critical and Lower Main...whereas Fe-Ti oxide pegmatite is restricted to the Upper Main and Upper Zones. Zoned pegmatite, with a core...core of Fe-Ti oxide pegmatite, is transitional between the two subgroups. New whole-rock and electron microprobe...microprobe analyses of olivine-clinopyroxene pegmatite from the Upper Critical and Lower Main Zones provide |  | | Journal (article/letter/editorial) | | chemistry and Sm–Nd age correlation of magmatic pegmatite garnet overprinted by eclogite-facies metamorphism...relationships with other pegmatite minerals indicate that garnet crystallized during pegmatite emplacement. Whole...though continuous garnet crystallization during pegmatite-emplacement. This was supposedly related to low...of metamorphic andalusite in the metapelitic pegmatite hostrock. Protracted magmatic and metamorphic... Keywords: Garnet; Sm–Nd geochronology; Meta-pegmatite; Koralpe; Permian; Re-equilibration 1. Introduction |  | | Journal (article/letter/editorial) | | the Paleozoic margin. As in some other granite occurrences [e.g., in the northern Black Forest, F.R.G. (Emmermann...quartz--feldspar pegmatites. Composite aplite--pegmatite dykes are c o m m o n in the Leinster Granite...NNE--SSW strike direction, simple unzoned lithium pegmatite dykes (Steiger and yon Knotting, 1974) are found...over 100 m. As a result at least sixteen pegmatite occurrences have been located in five areas within the...diamond drill hole which passed through a spodumene pegmatite and an aplite vein. Data on the thickness and |  | | 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 . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | the known rare earth elements (REE), Ti and Li occurrences and exploration potential in Finland, based on...Lamujärvi, and Iivaara), rapakivi granite and pegmatite (Kovela), and kaolin-bearing weathering crusts...vanadium mine. For several years, Rare Element (RE)-pegmatite of the Kaustinen and Somero–Tammela areas has...Geological Survey of Finland (GTK). At Kaustinen, Li-pegmatite occurs as subparallel dyke swarms in an area of...Paleoproterozoic mica schists and metavolcanic rocks. Li pegmatite contains more than 10% spodumene as megacrysts |  | | Journal (article/letter/editorial) | | University] at 13:51 05 January 2015 Abstract Pegmatite deposits commonly occur in the 1500 km long, N-S-trending...migmatite, granitoid gneiss, gneiss, and schist. The pegmatite veins and dikes are mostly 2 to 5 meters wide...The zoning pattern is rather distinct in the pegmatite body, where tourmaline is present. The light-colored...230° to 410°C. Salinities of fluid inclusions in pegmatite minerals yielded from 1.0 to 10.8 NaCl equiv....crystals (several cm across) from the Sakangyi pegmatite provide an opportunity to extract the fluids trapped |  | Alfonso, P., Melgarejo, J. C., Yusta, I., Velasco, F. (2003) GEOCHEMISTRY OF FELDSPARS AND MUSCOVITE IN GRANITIC PEGMATITE FROM THE CAP DE CREUS FIELD, CATALONIA, SPAIN. The Canadian Mineralogist, 41 (1) 103-116 doi:10.2113/gscanmin.41.1.103 | Journal (article/letter/editorial) | | GEOCHEMISTRY OF FELDSPARS AND MUSCOVITE IN GRANITIC PEGMATITE FROM THE CAP DE CREUS FIELD, CATALONIA, SPAIN...Creus pegmatite field exhibits a well-defined regional zonation of four types of granitic pegmatite: barren...content, relative to K-feldspar, with increasing pegmatite evolution. Type-I microcline-rich pegmatites have...buildup in this element from the earliest stages of pegmatite crystallization. Trace-element variation in feldspars...muscovite, X-ray fluorescence, evolution, granitic pegmatite, Cap de Creus, Catalonia, Spain. SOMMAIRE La |  | | 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) | | THE ELBAITE SUBTYPE OF RARE-ELEMENT GRANITIC PEGMATITE T. SCOTT ERCIT§ Canadian Museum of Nature, P.O...the elbaite subtype of rare-element granitic pegmatite has been encountered within the O’Grady batholith...granite and felsitic satellite dykes. On the whole, pegmatite bodies show a mildly NYF-type geochemical and...(elbaite-bearing). The melts parental to the pegmatite bodies were more voluminous, more alkaline, less...than is the norm for melts parental to LCT-type pegmatite. Differentiation of these melts sequentially produced |
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