 | | Journal (article/letter/editorial) | | constitutes an important gangue mineral, and such occurrences have themselves been sources of fine specimens...about 9 cm across and occurred in groups and on a pegmatite matrix. Relative to this occurrence, Emerson (1895)...almandine-spessartine specimen from the Frank Steidler pegmatite, Valley Township, Chester County, Pennsylvania...near Southbury, New Haven County, and similar occurrences in adjacent Fairfield County, Connecticut. The...where they are found in pockets with Tessin-habit quartz and terminated, free-standing kyanite crystals |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...William J. Brunet set out to trace three ilmenite occurrences mentioned in late 19th-century literature. One...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series |  | | 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...rocks. Li pegmatite contains more than 10% spodumene as megacrysts (1â10 cm), albite, quartz, K-feldspar |  | | 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...well-known from the 600 Ma old North Atlantic province of carbonatites and ultramafic alkaline magmatism...of a reasonable potential for diamonds in the province. In the Sarfartoq area the 2006 results illustrate |  | | 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) |  | | Journal (article/letter/editorial) | | apatite, albite, muscovite, potassic feldspar, and quartz in the former, and bixbyite, topaz, sanidine, and...its broad distribution, only those spessartine occurrences furnishing good specimens or important gem rough...massive spessartine and relatively small crystals in quartz matrix occur at Jail Hill near Haddam, Connecticut...also in Amelia County, and from the Herbb No. 2 pegmatite near Flat Rock, Powhatan County, Virginia (Dietrich...in good specimens from most, if not all, such occurrences. It is, however, locally associated with and |  | | 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...are even mined for their large, clean crystals of quartz and feldspar. Pegmatites are abundant in Greenland...unknown at present. In a broader sense, the term pegmatite is used for any coarse-grained vein of granitic |  | | 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 |  | | 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) | | the Brunswick pegmatite field and the Central Maine Synclinorium of the Oxford pegmatite field, in Maine...characteristics (e.g., Topsham area of the Brunswick pegmatite field). Significant chemical-compositional and...Brunswick and Oxford pegmatite fields. Columbite-group minerals from the Brunswick pegmatite field mainly consist...The structural state of CGM from the Brunswick pegmatite field ranges from highly cation-disordered to...predominantly highly ordered CGM in the Oxford pegmatite field. Limited concurrent fractionation of Mn |  | | 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 (issue) | | the best anywhere. Handsome specimens of barite, quartz, rhodochrosite, silver, and numerous other species...28 million Troy ounces or about 900 metric tons (mt) of silver (Weed, 1912). The silver panic of 1892â93...district and examined some claims on the large black quartz reefs located just below the big butte overlooking...sense, Clark purchased four properties within the quartz-rich zone anyway: the Original, the Colusa, the...to New York for assay. Learning that the black quartz at the surface did indeed contain a significant |  | | Book | | affects its present characteristics as a minera1 province, because of the exposure of the various depth...granite, quartz monzonite, diorite ÂŁ C 443 H H O H Ctf c/3 O H DEEP LEVEL aplite, pegmatite foliated...(Ronov and Yaroshevsky, 1969). TonalitĂ© (light quartz diorite) "is the dominant rock type in the continental...batholiths (gabbro, diorite, tonalitĂ©, granodiorite, quartz monzonite, granite) having a total silica content...70-100% contribution from melts derived from the upper mantle above subduction zones" (Brown, 1979). To |  | | Journal (issue) | | subscriptions |r^ , COVER: AMAZONITE with smoky quartz, 10 cm tall, from the Yucca Hill claim, Park County...labels for displays, and (5) those 1 Not all Dana occurrences have been verified in recent times. 2 Some localities...Aquamarine and Goshenite, Molybdenite, Ferrimolybdite, Quartz, Fluorite, Brannerite) Calumet mine Salida, Turret...Actinolite var. Uralite after Diopside, Magnetite, Quartz var. Smoky, Sphene, Grossular, Corundum var. Sapphire...Browns Creek Area (Beryl var. Aquamarine, Phenakite, Quartz var. Smoky, Fluorite, Bertrandite, Muscovite, Orthoclase |  | | Book | | affects its present characteristics as a mineral province, because of the exposure of the various depth...g r a n i t e , quartz monzonlte, d i o r i t e O 3 DEEP LEVEL aplite, pegmatite foliated, gneissic...the crust (Ronov and Yaroshevsky, 1969). (light quartz diorite) "is the dominant rock type in the continental...batholiths (gabbro, diorite, tonalite, granodiorite, quartz monzonite, granite) having a total silica content...70-100% contribution from melts derived from the upper mantle above subduction zones" (Brown, 1979). To |  | | 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 |  | | 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 ........ |  | | 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...pp. 11-13, 1933 8 Bastin, Edson S., Feldspar and quartz deposits of southeastern New York: U. S. Geol.Straey...occur on Mount Royal, Montreal. Intrusions of pegmatite accompanied Paleozoic ore deposition in widely...pegmatitic quartz veins accompanying the Paleozoic granites of western Spain.12Tin-bearing pegmatite dikes |  | | 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...feldspar and quartz are well-known and commonplace ones. In Finland feldspar and quartz have been quarried...coarse-grained varieties of granite, i.e., pegmatite occurrences. It was in 1956 that the Geological Survey |  | SĂĄnchez-Muñoz, Luis, MĂŒller, Axel, AndrĂ©s, Sol LĂłpez, Martin, Robert F., Modreski, Peter J., de Moura, Odulio J.M. (2017) The PâFe diagram for K-feldspars: A preliminary approach in the discrimination of pegmatites. Lithos, 272. 116-127 doi:10.1016/j.lithos.2016.10.030 | Journal (article/letter/editorial) | | petrological features, such as the abundance of quartz, feldspars, micas and phosphates. Group I is represented...most cases with hypersolvus feldspars, devoid of quartz and with minor biotite, which are common in rift...relatively flux-poor, silica-rich pegmatites with quartz, subsolvus feldspars and biotite as major primary...relatively flux-rich, silica-rich Ppoor pegmatites with quartz, subsolvus feldspars, and muscovite as the major...orogens, such as in the Eastern Brazilian Pegmatite Province as the result of the collision of cratons |  | | Journal (article/letter/editorial) | | jahnsiteâwhiteite groups from the Mount Wills pegmatite ïŹeld, Victoria, Australia WILLIAM D. BIRCH* Geosciences...Knocker dykes are the most fractionated in the pegmatite ïŹeld derived from late-stage melts of the Late...jahnsiteâwhiteite; FeâMn phosphates; granite pegmatite; Mount Wills; Victoria. 40 km north of Omeo,...operations (Fig. S1 and Fig. 2). However, the pegmatite dyke ïŹeld extends for nearly 60 km, between Glen...as more than 200 small leases over individual pegmatite dykes were taken up (Cochrane & Bowen, 1971). |  | | Journal (issue) | | ........187 by P. B. Moore The origin of faden quartz ..............................................................191 by R. P. Richards Amethyst occurrences of the eastern United S ta tes.................wide range of interests, from pyroluminescence in quartz to extensive studies on contact metamorphism in...plants and animals, and A. E. Fersman pioneered in pegmatite geochemistry, subjects which later were to elicit...INTRODUCTION The defining characteristic of faden quartz crystals is the presence of a white thread-like |  | | 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 |  | | Report (issue) | | of Use. Content: This Content is offered by the Province of Ontarioâs Ministry of Northern Development...DĂ©veloppement du Nord et des Mines (MDNM) de la province de l'Ontario. Les recommandations et les opinions................. 27 PEGMATITES OF THE GRENVILLE PROVINCE.................... 28 TERMINOLOGY..............K-Feldspar................ Plagioclase............... Quartz.................... Accessory Mineralogy.........Past/Potential Pegmatite Commodities..................... Potassium Feldspar........ Quartz............ |
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