 | | Journal (issue) | | small black micro crystals of manganbabingtonite, quartz, calcite, datolite, and inesite (identity confirmed)...(8 cm) tall, and J5/g inches (4 cm) thick. The quartz from here can also be nice; I had one large clear...by a quantity of glistening '·Herkimer diamonds" quartz crystals, in which she specializes. Most of them...France. Also, he had small trays holding small clear quartz crystals, one tray with pale green inclusions of...stibnites from a new Nevada locality, the Murray Mine, not the old Manhattan, but he had only three specimens |  | | Report (issue) | | white to pale reddish pink; pale yellowish brown to dark brown. Streak: White. Luster: Dull, earthy in aggregates...370(1) Z=4 X-ray Powder Pattern: San Diego mine, California, USA. 3.038 (100), 4.835 (90), 2.964 (90), 3...35 8.50 Total 97.9 96.62 (1) San Diego mine, California, USA; by electron microprobe, total Fe as FeO;...Ca1.11 (Ta1.44 Nb0.51 )Σ=1.95 O6 . (2) Wampewo pegmatite, Uganda; by electron microprobe, total Fe as FeO;...albite, quartz (San Diego Co., California, USA); microlite, wodginite, zircon, lepidolite, quartz (Wampewo |  | Loun, Jan, Novák, Milan, Cempírek, Jan, Škoda, Radek, Vašinová Galiová, Michaela, Prokeš, Lubomír, Dosbaba, Marek, Čopjaková, Renata (2018) Geochemistry and secondary alterations of microlite from eluvial deposits in the Numbi mining area, South Kivu, Democratic Republic of the Congo. The Canadian Mineralogist, 56 (2) 203-220 doi:10.3749/canmin.1700091 | Journal (article/letter/editorial) | | OF MICROLITE FROM ELUVIAL DEPOSITS IN THE NUMBI MINING AREA, SOUTH KIVU, DEMOCRATIC REPUBLIC OF THE CONGO...within the ~1000–900 Ma old Kibara belt unit, Numbi mining area, South Kivu province of the Democratic Republic...in the degree of fractionation: in the Mungwe pegmatite (lepidolite subtype) cassiterite . microlite-group...(columbite–tantalite), wodginite þ ferrotapiolite; at the Misumari II pegmatite (berylcolumbite subtype)...microlite . cassiterite, columbite–tantalite þ wodginite–ferrowodginite. Both pegmatites underwent deep |  | | Journal (article/letter/editorial) | | 3749/canmin.1600010 A TECTONIC EVALUATION OF PEGMATITE PARENT GRANITES SARAH L. HANSON Adrian College...Department, 110 S. Madison St., Adrian, Michigan 49221, USA ABSTRACT Pegmatites containing rare elements can...suggested by the acronyms. The relationship between pegmatite family and granite tectonic type were re-examined...published granite compositions as a proxy for initial pegmatite composition, with special regard to the orogenic...diagrams for these granites suggest that LCT granite-pegmatite systems originate in orogenic and perhaps less |  | Černý, Petr, Chapman, Ron, Ferreira, Karen, Smeds, Sten-Anders (2004) Geochemistry of oxide minerals of Nb, Ta, Sn, and Sb in the Varuträsk granitic pegmatite, Sweden: The case of an “anomalous” columbite-tantalite trend. American Mineralogist, 89 (4) 505-518 doi:10.2138/am-2004-0405 | Journal (article/letter/editorial) | | Nb, Ta, Sn, and Sb in the Varuträsk granitic pegmatite, Sweden: The case of an “anomalous” columbite-tantalite...ABSTRACT The complex, petalite-subtype Varuträsk pegmatite in the Proterozoic rocks of northern Sweden is...is, as a whole, rather poor in Nb and Ta. The pegmatite consolidated in eight units, but the (Nb,Ta)-oxide...contrast, rare inclusions of ferrotapiolite and wodginite closely reflect the (Fe,Mn,Ta,Nb) compositional...abundance of native antimony and stibarsen in the pegmatite, and the absence of Bi-bearing minerals. Rare |  | | Journal (issue) | | 199~ Weird The Mineral and Wonderful from Quartz Alberta's Collector's Newsletter in Septarian...(though a little skeptical) to learn of a nearby quartz collecting locality. It is a three-hour drive northeast...locomotive cxursions. My first collecting specialty was quartz, for which I've retained a soft spot, and I was...produced a wide variety of interesting and unusual quartz crystals. These are found in abundant ironstone...nodules that weather out of Fig. 1 Partial, hollow quartz crystal 11/4 inches (3 cm) across, with multiple |  | | Book | | nearly all metals and the inevitable closing of many mining operations, it is a matter of the industry's survival...decision, not only is a handy volume affered to the mining and processing community but also duplication of...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 |  | | Journal (article/letter/editorial) | | any relation with gross mineral chemistry or pegmatite fractionation. Recrystallization or the presence...local host-rockinfluenced redox conditions during pegmatite crystallization, often results in inverse discordance...are recognized for different pegmatite categories. Within the same pegmatite body and commonly even within...Yellow muscovite reflecting reducing conditions of pegmatite crystallization. See Table 2 for representative...(Table 1). The only exception is the Skuleboda pegmatite, which represents a mixed NYF (Nb, Y, F-enriched |  | Tang, Yong, Zhao, Jing-Yu, Zhang, Hui, Cai, Da-Wei, Lv, Zheng-Hang, Liu, Yun-Long, Zhang, Xin (2017) Precise columbite-(Fe) and zircon U-Pb dating of the Nanping No. 31 pegmatite vein in northeastern Cathaysia Block, SE China. Ore Geology Reviews, 83. 300-311 doi:10.1016/j.oregeorev.2016.10.040 | Journal (article/letter/editorial) | | and zircon U-Pb dating of the Nanping No. 31 pegmatite vein in northeastern Cathaysia Block, SE China...Nanping pegmatite Columbite-(Fe) U-Pb dating Zircon Hf isotope a b s t r a c t The Nanping pegmatite deposit...Columbite-group minerals from zone I in the Nanping No. 31 pegmatite vein belong to columbite-(Fe). The compositions...this pegmatite vein to approximately 387 Ma. Zircon eHf(t) values from the Nanping No. 31 pegmatite range...from 2107 to 2246 Ma, implying that the Nanping pegmatite-forming melts are derived from Paleoproterozoic |  | | 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) | | include the Big Whopper and Big Mack petalite pegmatite systems which potentially represent the world's...F. W. Breaks Die wichtigsten Seltene-Element-Pegmatite von Ontario liegen im Gebiet des Separation Lake...zweitgroÈûte LithiumlagerstaÈtte dieses Typs. Die Pegmatite treten in zwei Gangsystemen in der NaÈhe des Separation...BeryllPegmatite, sowie komplexe Pegmatite des Petalit-Subtyps und, untergeordnet, Pegmatite È hnlichkeiten mit dem...columbite-tantalite group minerals from the Separation Rapids pegmatite group in N.W. Ontario ± a suite of beryl-type |  | | Journal (article/letter/editorial) | | belt. Another characteristic. lithiumbearing pegmatite procince is lound in the basement rocks o f Zimbabwe...Cassiterite 1. Introduction Although the major granite pegmatite regions of Africa have been known for a long time...study reviews the principal pegmatite regions in Africa, where extensive mining of minerals has taken place...paid t o the mineralogy and geochemistry of the pegmatite deposits, and in particular t o tin and tantalum...minerals like ceramic feldspar, mica, and high purity quartz, and a large variety of attractive and highly priced |  | | Journal (article/letter/editorial) | | replaced during the latter stagesof granitic pegmatite evolution by manganotantalite and fersmite or...r, and low a".. during alteration by evolved pegmatite fluids at 350-550'C and 2-4 kbar. Secondary(w...mineralassociation Rutherford pegmatite,Amelia, VA, second intermediate zone Tin Mountain pegmatite,Custer, SD, quartzspodumene-mica...goethite Brown Derby pegmatite,Gunnison County, CO, fepidolite{u aftz zone Opportunity pegmatite,GunnisonCounty...GunnisonCounty, CO, quartz zone Pidlite pegmatite, Mora County, NM, lepidolite4uartz zone Fungwe district, Zimbabwe |  | Lupulescu, Marian, Chiarenzelli, Jeffrey, Pecha, Mark, Singer, Jared, Regan, Sean (2018) Columbite-Group Minerals from New York Pegmatites: Insights from Isotopic and Geochemical Analyses. Geosciences, 8 (5) 169 doi:10.3390/geosciences8050169 | Journal (article/letter/editorial) | | Albany, NY 12230, USA Department of Geology, St. Lawrence University, Canton, NY 13617, USA; jchiarenzelli@stlawu...Geosciences, University of Arizona, Tucson, AZ 85721, USA; mpecha@email.arizona.edu Department of Earth and...Rensselaer Polytechnic Institute, Troy, NY 12180, USA; singej2@rpi.edu Eastern Geology and Paleoclimate...Geological Survey, P.O. Box 628, Montpelier, VT 05602, USA; sregan@usgs.gov Correspondence: marian.lupulescu@nysed...Plasma-Mass Spectrometry (LA-MC-ICP-MS)). All four pegmatite localities sampled are hosted by the Proterozoic |  | | Journal (article/letter/editorial) | | trends in Nb,Ta-oxide minerals of the Jihlava Pegmatite District, Czech Republic P. C e r n ) 1 and D. N6mec...lepidolite-subtype rare-element pegmatites of the Jihlava pegmatite district, western Moravia, Czechoslovakia. In most...consolidation. Extensive reaction of the residual pegmatite melt with the ×enoliths contaminated the near-by...Pyroxen-Biotit-reichen Syenit-Nebengesteinsxenolithen in die Pegmatite gegen Ende ihrer Verfestigung. Tiefgreifende Reaktion...der thermischen Gleichgewichtseinstellung der Pegmatite mit ihren syenitischen Nebengesteinen bildete |  | Li, Jiankang, Liu, Congyu, Liu, Xiang, Li, Peng, Huang, Zhibiao, Zhou, Fangchun (2019) Tantalum and niobium mineralization from F- and Cl-rich fluid in the lepidolite-rich pegmatite from the Renli deposit in northern Hunan, China: Constraints of fluid inclusions and lepidolite crystallization experiments. Ore Geology Reviews, 115. 103187 doi:10.1016/j.oregeorev.2019.103187 | Journal (article/letter/editorial) | | from F- and Cl-rich Fluid in the Lepidolite-rich Pegmatite from the Renli Deposit in Northern Hunan, China:...from F- and Cl-rich Fluid in the Lepidolite-rich Pegmatite from the Renli Deposit in Northern Hunan, China:...from F- and Cl-rich Fluid in the Lepidolite-rich Pegmatite from the Renli Deposit in Northern Hunan, China:...Li, Li9968@126.com Abstract Lepidolite-type pegmatite is usually produces tantalum–niobium (Ta–Nb) ...controversial. The pegmatite dike No. 5 is a lepidolite-rich dike in the Ta–Nb pegmatite deposit in Renli |  | | Book (edition) | | Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...very old origin, often without lrnown source. e.g. quartz or cinnabar. Current practice most often names...polished mineral surface, expressed in clase. 7 - quartz. 8 - topaz, 9 - corundum, 10 - dia- percentage...abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture), dept...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g. |  | | Journal (article/letter/editorial) | | sind Pegmatite mit seltenen Elementen eine h~iufigeErscheinung. Die charakteristischen Pegmatite einer...Frage. Die mit seltenen Erden angereicherten Pegmatite, die U, Th oder Mo fiihren, spielen eine untergeordnete...Basementst6rungen zu linden. Typisch sind Hochdruck-Pegmatite, die Spodumen fiihren und in Li, Rb, Be, Ta<>Nbangereichert...Basementst6rungen. In der Churchill Provinz liegen die Pegmatite (1800-1700 Mio a) verteilt in Griinsteingiirteln...tektonischer Baustile vor. Am hiiufigsten sind Pegmatite, die Be und Nb>Ta fiihren, eine Anreicherung in |  | | Book | | occurs at Trimouns as colorless, pink and pale brown, translucent to transparent, tabular microcrystals...AFRICA widely in Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic...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,...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns |  | | Report (issue) | | International, LLC P.O. Box 263, East Hampton, CT 06424, USA Phone 1.860.267.1512; fax 1.860.267.7225 www.lapisint...elbaite crystals with lepidolite from the Golconda Mine in Minas Gerais, Brazil by Eberhard Equit, 1993...CHRISTIAN WEISE VERLAG, GERMANY AND LAPIS INTERNATIONAL, USA Tourmaline ♦ History ♦ Mineralogy • Tourmaline...from nearly colorless through green, red, blue, brown and black. Acceptance of this variability lay in...were uncovered there until the 1860s when a true mining effort was directed at the outcrop (King, 2000) |  | | Journal (article/letter/editorial) | | bismuthite, uraninite, rutile, cassiterite, but also of quartz and feldspar, as well as alterations to, and intergrowth...such phases formed in the latemagmatic stage of pegmatite crystallization, they would have had little or...and Smeds 1996). Fractures originally filled with quartz or feldspar have been mined-out during HF-leaching...minerals from the Brown Derby Mine and the Quartz Creek Granite near Gunnison, Colorado. J Geophys Res 61:215–232...of the Separation Rapids rare-element granitic pegmatite group, northwestern Ontario. Can Mineral 36:609–635 |  | | Book (edition) | | Morocco; (center, left) wulfen ite San Francisco mine, Sonora, Mexico; (center) amethyst, Veracruz, Mexico;...Mountains, Utah; (lower le ft) rhodochrosite, N'Chwaning mine, Sou th A frica; {lower left, center) wulfenite...Encyclopedia of minerals ~~cbe County Public Library Saguache, Colorado OEMCO For Refere nee Not to...Sagtiache Co1tntr Publlc I...ibran' Saguache, Colorado ~ VANNOSTRAND REINHOLD ~ - - - - N e w York...Cal and Kerith Graeber Cureton Mineral Company Colorado School of Mines cw Charles and Marcelle Weber | | | Book (edition) | | Morocco; (center, left) wulfenite, San Francisco mine, Sonora, Mexico; (center) ameihyst, Veracruz, Mexico;...rnodochrosite, N’Chwaning mine, South Africa; (lower left, center) wulfenite, Red Cloud mine, Arizona; (lower...Encyclopedia of minerals Sagiiache County Pu blic Library Saguache , Colorado DEMCO For Reference Not to...Wendell E. Wilson Library Saguache County Public Saguache, Colorado VAN NOSTRAND REINHOLD New York ...Cal and Kerith Graeber Cureton Mineral Company Colorado School of Mines Charles and Marcelle Weber Dan |  | | Book (edition) | | Vesuvius, Italy (12, column 2) and SEMSEYITE, Julcani mine, Huancavelica, Peru (#3, column 2). Color, page...Calcjte 4 Fluorite 5 Apatite 6 Orthoclase 7 8 9 10 Quartz Topaz Corundum Diamond In a few descriptions we...crystallize with right- or left-handed forms (e.g., quartz). epitaxy Overgrowth of one crystal on another...(4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum, (10) diamond. monochromatic...of weakness caused by deformation or twinning. pegmatite Very coarse-grained granitic rock representing |  | | Journal (issue) | | in southwestern Fennoscandia: Backdrop to the pegmatite fields of southern Norway……………………………………………………………………………………...paleoclimate controls of lithium-cesium-tantalum (LCT) pegmatite genesis, exhumation, and preservation……………………...rediscovered pegmatite in the Stettin Complex, Wausau Syenite Compley, Marathon County, Wisconsin, USA……………………………………………...REIMER, W. Mineralogical study of the Gonçalo Li-pegmatite deposit, Portugal……………………………………..23 FALSTER,...luorapatite-quartz assemblage in the Emmons pegmatite, Greenwood, Oxford Co., Maine, USA: implication |
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