 | | Journal (article/letter/editorial) | | the known rare earth elements (REE), Ti and Li occurrences and exploration potential in Finland, based on...LamujĂ€rvi, 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 SomeroâTammela 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 |  | | Book | | William J. Brunet set out to trace three ilmenite occurrences mentioned in late 19th-century literature. One...2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series...of Amsteg, subordinate drainages running south to Val Caverdiras; ilmenite rose-bearing clefts are found...crystals from 2 to 5 cm across occur with good brown zircon crystals (Britvin, Ivanyuk andYakovenchuk, 1995;...is the source of the large, lustrous, rich brown zircon crystals which arguably are world's best for the |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF THE UNITED STATES David M. Seaman American Museum of Natural History, New York...whereas the almandite-spessartites found in granite pegmatite are predominently trapezohedral crystals or else...Concord, Leiperville, and Newlin, Pennsylvania; Upper Merryall and Haddam, Connecticut; Russell and Westfield...The crystals occur most frequently in common pegmatite with microcline and orthoclase as the chief feldspars...cut into fine gems. Noted from Pala, California; Mt. Antero, Colorado; some localities in Chester and |  | | Journal (article/letter/editorial) | | previously been recorded only in granitic-pegmatite occurrences. Subidiomorphic monazite-(Ce) from leucosome...enrichment has generally been considered a feature of pegmatite-precipitated monazite, with the implication that...The retention of accessory phases (monazite and zircon) in melanosomes during partial melting led to the...literature values from granitic and pegmatitic occurrences in Table 2. 737 Monazite-(Ce) cores in all...Average of 8 pegmatite monazites, Val Vigezzo, Italy (Demartin et al., 1991) 7 Average of 8 pegmatite monazites |  | | 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 QĂŽrqut 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 LiâCsâTa (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 LiâCsâTa (LCT) pegmatite mineralisation has predominantly focused on the...mineral exploration techniques applied to LCT pegmatite mineralisation have been published, covering (i) |  | 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) | | Mineralogist, Volume 100, pages 83â94, 2015 Megacrystic zircon with planar fractures in miaskite-type nepheline...geochronological data are reported for zircon megacrysts found in miaskitic (zircon, biotite, plagioclase-bearing)...part of the Ivrea-Verbano Zone, southern Alps. Zircon from these pegmatites was reported to reach up...peridotites and gabbros between 212.5 and 190 Ma. A zircon crystal of 1.5 cm size records a systematic core-to-rim...effective diffusion radii to 50 ÎŒm. The U-Pb system of zircon is therefore interpreted to reflect an episodic |  | | Book | | descriptions of properties or with listings of occurrences has not been included because of the availability.... . . . 165 180 182 Chapter 5: RADIOACTIVE PEGMATITE DEPOSITS Geological Characteristics of Pegmatites.... . . . . . . . . . . . . . . Basin and Range Province . . . . . . . . . . . . . . . . . . . . . . ....483 486 Contents xiv Other United States Occurrences . . . . . . . . . . . . . . . . . . . . . . ...thorium, which aTe strongly concentrated in the upper lithosphere, are markedly oxyphile elements occwTing |  | | Journal (article/letter/editorial) | | statistical analysis applied to rare-element LCT-type pegmatite fields: an original approach to constrain faultsâ...emplacement of LCT-type (LithiumâCesiumâTantalum) pegmatite fields and their relationships with host rocks...both i) the spatial distribution of the pegmatite occurrences, including their grouping/ scattering and...trending faults family; with 50 % of the pegmatite occurrences located less than 500 m away from one of...out a lack of spatial link between each of the pegmatite subtypes and several potential granitic sources |  | 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) | | Silicocarbonate pegmatites from the southern Grenville Province have provided exceptionally large crystal specimens...albite, apatite, perthitic microcline, phlogopite, zircon, tourmaline, titanite, danburite, uraninite, sulfides...temporally associated with granitic pegmatites. Zircon UâPb results include both Shawinigan (circa 1165...collapse, voluminous leucogranite and granitic pegmatite intrusion, iron and garnet ore development, and...pervasive localized hydrothermal alteration. Inherited zircon, where present, reflects the broad range of igneous |  | | Journal (article/letter/editorial) | | of the Armorican terrane, a detrital zircon study revealed zircon ages at ~1.2 Ga, ~1.5 Ga and ~1.8 Ga...unit (SORGER et al., 2020). The youngest detrital zircon generation suggests a Neoproterozoic deposition...These findings are in good agreement with recent zircon studies of orthogneisses from the Drosendorf unit...âŒ35 km subsequently followed by the ITD to the upper/middle crustal level (âŒ15 km depth). The PâT evolution...yielded a medium-pressureâmedium-temperature (MPâMT) metamorphic peak of 0.85â1.10 GPa at 720â780 °C |  | | 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 âsuper-LCT pegmatiteâ 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 dâun volume |  | | Journal (article/letter/editorial) | | Michigan. Aesrnlcr Two contrasting swarms of pegmatite dikes occur intermingled in the Pikes Peak granite...ite pegmatites consists chiefly of radioactive zircon, fluorite, astrophyllite, thorite, and lesser amounts...characterized by quartz and amazonite crystals, zircon, biotite, siderite, and minor topaz, allanite,...lumped together in a single province-the "Pikes Peak-Florissant Province" by Heinrich (1957).Owing to...Stern, U. S. GeologicalSurvey. fnformation on pegmatite locationsfurnishedby Messrs.Penceand Over is gratefully |  | | Journal (issue) | | labels for displays, and (5) those 1 Not all Dana occurrences have been verified in recent times. 2 Some localities...(Microcline var. Amazonite, Phenakite, Topaz, Quartz, Zircon, Bastnaesite, Fluorcerite, Columbite, Fluorite...Tunnel Colorado Springs, St. Peters Dome Area (Zircon) Fountain Creek Colorado Springs (Gypsum var. Selenite...(Riebeckite, Zircon, Astrophyllite, Elpasoite (T), Fayalite, Gearksutite, Cryolite, Zircon var. Crytolite...Lanthanite, Phenakite, Quartz var. Smoky, Topaz, Zircon, Hematite, Goethite, Amethyst) FREMONT COUNTY Cotopaxi |  | | 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 |  | | Book | | affects its present characteristics as a minera1 province, because of the exposure of the various depth...H H O H Ctf c/3 O H DEEP LEVEL aplite, pegmatite foliated, gneissic, migmatitic granite Ï pc...70-100% contribution from melts derived from the upper mantle above subduction zones" (Brown, 1979). To...leucocratic equivalents, polymineralic (e.g. aplite, pegmatite) or monomineralic (vein quartz); and (3) lamprophyres...by stoping or cauldron subsidence into a passive upper crust comprising (1) marine "eugeoclinal" volcanic-sedimentary |  | | Report (issue) | | France dâOutre-Mer CAMP Central Atlantic Magmatic Province CGIAR-CSI Consultative Group on International...Reserves Committee (Australasian) LIP Large Igneous Province LREE Light rare-earth element METI Ministry...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 ........ | | | Report (issue) | | France dâOutre-Mer CAMP Central Atlantic Magmatic Province CGIAR-CSI Consultative Group on International...Reserves Committee (Australasian) LIP Large Igneous Province LREE Light rare-earth element METI Ministry...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 ........ |  | 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) | | occurrence is located in Malipo County in the province of Yunnan, southern China. The occurrence lies...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...interacting with Cr (±V)-rich metamorphic rocks at upper greenschist to lower amphibolite facies. This study |  | | Book | | another oxide, "yttria", from minerals found in the pegmatite at Ytterby, Sweden. Both supposed oxides were...Swedish ehernist Ekeberg in the eourse of analyzing pegmatite minerals from Ytterby, Sweden and Kimito, Finland...minerals from the same loeality, the farnaus pegmatite at Ytterby, Swcden. This faet stresses the geoehemieal...(with 3 Figures) . . 189 Characteristics of Pegmatite Deposits of Tantalum. P. Cerny (with 18 Figures).... 266 Exploration Strategy and Methods for Pegmatite Deposits of Tantalum. P. Cerny (with 15 Figures) |  | | Journal (volume) | | . . . . . . . . . . . . . . . . . 14 PEGMATITE OCCURRENCES . .. .. . ...............................18 THE PEGMATITE OCCURRENCE OF LUOLAMĂKI . . . . . . . . . . . . . . . . . . . 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. |  | | Book | | affects its present characteristics as a mineral province, because of the exposure of the various depth...monzonlte, d i o r i t e O 3 DEEP LEVEL aplite, pegmatite foliated, gneissic, migmatitic granite Pi Q...70-100% contribution from melts derived from the upper mantle above subduction zones" (Brown, 1979). To...leucocratic equivalents, polymineralic (e.g. aplite, pegmatite) or monomineralic (vein quartz); and (3) lamprophyres...by stoping or cauldron subsidence into a passive upper crust comprising (1) marine "eugeoclinal" volcanic-sedimentary |  | | Book | | synthe- including gems, the and on natural occurrences, collectorâs specimens, John scholarly monograph...Fertil78 ity, Fevers and 131 France, 77 127 130 Italy, Poisons and Venomous Bites, Pregnancy, 127 ... Mexico, 480 Mongolian 507 Sudan, 508 456 Italy, 456 Kenya, (Namibia), 501 507 Spain, 445 ...AZ; Allan Caplan, CA; Giorgio Graziani, Rome, Italy; Harry Winston, Inc., New York, NY; Hoover, have...Van Pelt, Murphy, Los New Pagano, Monfalcone, Italy; Sanchez, E. Fallbrook, Scripps, Vienna, Angeles |  | | Journal (article/letter/editorial) | | 10.3749/canmin.1600075 THE SVECONORWEGIAN PEGMATITE PROVINCE â THOUSANDS OF PEGMATITES WITHOUT PARENTAL...Sveconorwegian pegmatite province in southern Norway and southwest Sweden hosts seven rareelement pegmatite districts...magmatism during post-orogenic extension. The pegmatite formation principally comprises four periods restricted...sectors). The observed relationships between pegmatite formation and regional high-grade metamorphism...In light of this, the genetic criteria of the pegmatite family classification scheme [NYF versus Lithium-Cesium-Tantalum |  | Knoll, Tanja, Schuster, Ralf, Huet, Benjamin, Mali, Heinrich, Onuk, Peter, Horschinegg, Monika, Ertl, Andreas, Giester, Gerald (2018) Spodumene Pegmatites and Related Leucogranites from the AustroAlpine Unit (Eastern Alps, Central Europe): Field Relations, Petrography, Geochemistry, and Geochronology. The Canadian Mineralogist, 56 (4) 489-528 doi:10.3749/canmin.1700092 | Journal (article/letter/editorial) | | Alps (Central Europe), about two dozen spodumene pegmatite bodies extend heterogeneously over the Austroalpine...concentration of rare metals. Keywords: spodumene pegmatite, leucogranite, Eastern Alps, geochemistry, Sm-Nd...demand has the implication that even small Li-pegmatite deposits might become economically viable (Kesler...About two dozen individual spodumene (LiAlSi2O6) pegmatite bodies extend heterogeneously across the Austroalpine...spatially associated with simple pegmatites. In some pegmatite ïŹelds relatively small, inhomogeneous leucogranitic |
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