| | Journal (article/letter/editorial) | 2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Sarah L. HANSON Geology Department, Adrian College... 110 S. Madison Street, Adrian, Michigan 49221, USA Alexander U. FALSTER and Karen L.WEBBER Department...2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Abstract Pegmatites enriched in the rare-earth elements...minerals such as polycrase-(Y), euxenite-(Y), samarskite-(Y) and xenotime-(Y), the LREE enrichment in monazite-(Ce)...Furthermore, the pegmatites have the typical NYF (Nb, Y, F) chemical and mineralogical characteristics of | | Guastoni, Alessandro, Secco, Luciano, Å koda, Radek, Nestola, Fabrizio, Schiazza, Mariangela, NovĆ”k, Milan, Pennacchioni, Giorgio (2019) Non-Metamict Aeschynite-(Y), Polycrase-(Y), and Samarskite-(Y) in NYF Pegmatites from Arvogno, Vigezzo Valley (Central Alps, Italy) Minerals, 9 (5) 313 doi:10.3390/min9050313 | Journal (article/letter/editorial) | Aeschynite-(Y), Polycrase-(Y), and Samarskite-(Y) in NYF Pegmatites from Arvogno, Vigezzo Valley (Central... Abstract: At Arvogno, Vigezzo valley in the Central Alps, Italy, pegmatite dikes are...ABX2 O8 euxenite group minerals as typical accessory minerals including aeschynite-(Y), polycrase-(Y), and...and samarskite-(Y). They are associated with additional typical minerals such as fluorite, Y-dominant...Y-dominant silicates, and xenotime-(Y). The YāNbāTiāTa AB2 O6 and ABX2 O8 oxides at the Arvogno pegmatites did | | | Journal (article/letter/editorial) | the actual structure of samarskite-(Y)? A TEM investigation of metamict samarskite from the Garnet Codera...Alps). These oxides have compositions in the samarskite-(Y) field and yield an amorphous response from...major substitutions involving (U+Th) with respect to (Y+REE). At the TEM scale, the samples show a continuous...noticeably consisting of relicts of the original samarskite structure, were deeply investigated by electron...the retrieved crystal structure of untreated samarskite is consistent with aeschynite and not with ixiolite | | | Report (issue) | mostly from columbitetantalite, pyrochlore, and euxenite ores and possibly from rocks containing loparite...chiefly from columbite-tantalite, microlite, or euxenite ores. Future advances in the field of niobium-tantalum...Quartz porphyry, Idaho. _ _ Granite porphyry, Idaho. _ Alaskite, Idaho____ Granite, Idaho. ___ ____ Granodiorite...Granite, California _ __ _ ___ Granodiorite, Johnston County, Okla_ __ 9 99 39 25.4 31 68 20 37 . . __________...________ _ Quartz latite, Craters of the Moon, Idaho. __ Quartz latite porphyry, Nevada. __ _ Average | | | Journal (article/letter/editorial) | in the Amur River regionāfergusonite-(Y), euxenite-(Y), samarskite-(Yb), aeschynite, Nb-bearing wolframiteāhave...minerals is characterized by increased concentrations of Y, Pb, U, Fe and decreased concentrations of W, Ta,...appraised as promising for Nb, Y, and REE. Fergusonite, samarskite, euxenite, and Nb-bearing wolframite are...metal mineralization. Keywords: fergusonite, euxenite, samarskite, aeschynite, wolframite, zwitter, lithiumāfluorine...highly technological rare metals (Nb,Ta, Zr, Re, Li, Y, REE), i.e., strategic raw materials used in Russiaās | | | Book | INTRODUCTION TO Robert Laut, Ph.D. 4880 Lower Valley Road, Atglen, Pennsylvania 19310 Dedication This...Published by Schiffer Publishing Ltd. 4880 Lower Valley Road Atglen, PA 19310 Phone: (610) 593-1777; Fax:...cleaning or trimming, and thoroughly clean the work area afterwards. It is the author's belief that in general...being productive. Thus it is most common to classif y deposits based on both the geologic setting and the...accessory minerals include uranothorite, thorianite, euxenite, thorite, pyrochlore, chevkinite, fluorite, bastnaesite | | | Report (volume) | Reconnaissance for Radioactive Minerals in Washington, Idaho, and Western Montana 1952-1955 By PAULL. WEIS, FRANK...1922Reconnaissance for radioactive minerals in Washington,. Idaho, and western Montana, 1952-1955, by Paul L. Weis...occurrences ____ ----___________________________ 7 7 11 Idaho----------------------------------------------------~---...occurrences______________________________ Gibbonsville area, Lemhi County________________________ Garm-Lamoreaux...-----_____________ 11 11 11 11 12 13 13 13 14 14 15 15 Bon~er CountY---------------------------------------Pegmatite | | | Journal (article/letter/editorial) | AND ALTERATION TRENDS OF GRANITIC-PEGMATITE-HOSTED (Y,REE,U,Th)ā(Nb,Ta,Ti) OXIDE MINERALS: A STATISTICAL...D, Ottawa, Ontario K1P 6P4, Canada ABSTRACT The (Y,REE,U,Th)ā(Nb,Ta,Ti) oxide minerals in REE-enriched...primarily comprised of the fergusonite, samarskite, euxenite, aeschynite and pyrochlore groups. They...alteration typically pushes the compositions of samarskite-, euxenite- and aeschynite-group minerals in a direction...varieties of samarskite-group minerals. Yttrotantalite(Y) is shown to be a member of the samarskite group, | | Popova, V. I., Muftakhov, V. A., Popov, V. A., Blinov, I. A., Kotlyarov, V. A. (2016) New data on REE and rare-metal mineralization in pegmatites of the Slyudyanogorsk muscovite deposit in the Southern Urals. Geology of Ore Deposits, 58 (8) 681-690 doi:10.1134/s1075701516080122 | Journal (article/letter/editorial) | veins have been found. Pegmatites with giant black Y-bearing epidote crystals are crosscut by veins with...TiāTaāNb oxides [fergusonite-(Y), samarskite-(Y), euxenite-(Y), polycrase-(Y), columbite-(Fe), pyrochlore...as well as of uraninite, ilmenorutile, scheelite, Y-bearing epidote, certain sulfides and rock-forming...rare-metal and REE minerals in the Slyudorudnik area to be found in igneous rocks (granitic muscoviteāquartzāfeldspar...muscoviteāquartzāfeldspar pegmatites with the NbāTaāTiāYāUāWāMo mineralization) than in metasomatic rocks. Keywords: | | | Journal (article/letter/editorial) | in the leading role of the minerals W, Ta, Nb, Bi, Y, REE, and As. The uniformity of mineral species and...complexes; the accessory minerals become enriched in Y, REE, U, and Th (Radkevich, 1971; Bolotnikov et al...Nb in ilmenite, rutile, titanite, and cassiterite; Y in zircon, fluorite, allanite, apatite, and titanite;...Fluorite Ce, Y fluorides Cyrtolite Allanite(Ce) Allanite(Y)* Tantaloniobates Apatite Xenotime(Y) Li, Al...Garnet Thorite Uraninite Cassiterite Chernovite(Y)* Bi, Pb arsenates Bismuth Sulfides lg mnz lfg | | Pieczka, Adam, Hawthorne, Frank C., Ma, Chi, Rossman, George R., SzeÅÄg, Eligiusz, Szuszkiewicz, Adam, Turniak, Krzysztof, Nejbert, Krzysztof, Ilnicki, SÅawomir, Buffat, Philippe, Rutkowski, Bogdan (2017) Å»abiÅskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, a new mineral of the titanite group from the PiÅawa GĆ³rna pegmatite, the GĆ³ry Sowie Block, southwestern Poland. Mineralogical Magazine, 81 (3) 591-610 doi:10.1180/minmag.2016.080.110 | Journal (article/letter/editorial) | of Technology, Pasadena, 91125-2500, California, USA University of Silesia, Faculty of Earth Sciences...crystal of zircon intergrown with polycrase-(Y) and euxenite-(Y). Å»abinĢskiite is transparent, brittle, brownish...polycrase-(Y) and euxenite-(Y) from Ca-contaminated fluxed melts or early hydrothermal fluids. K E Y WO R D...Mineralogical Society THE titanite group, (7)X (6)Y (4)(TO4)O, currently comprises five mineral species:...relatively common subordinate substituents at the Y site of the titanite structure. However, titanites | | | Journal (issue) | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...Pegmatites of varied mineralization occur over a broad area, the heaviest concentrations being near the town...2000 Mozambique pegmatite province, that is, an area within approxiĀ mately a 200-km radius of Alto Ligonha...geology of nearby Malawi, Zambia and Zimbabwe. The area is within the East African Monsoon Belt, at an average...Bettencourt Dias photo. Access to the Alto Ligonha area is either (1) by air to Nampulaā whose airport is | | Szuszkiewicz, Adam, Pieczka, Adam, SzeÅÄg, Eligiusz, Turniak, Krzysztof, Ilnicki, SÅawomir, Nejbert, Krzysztof (2016) The Euxenite-Group Minerals and Products of Their Alteration In The Hybrid Julianna Granitic Pegmatite, PiÅawa GĆrna, Sudetes, Southwestern Poland. The Canadian Mineralogist, 54 (4) 879-898 doi:10.3749/canmin.1600023 | Journal (article/letter/editorial) | 879-898 (2016) DOI: 10.3749/canmin.1600023 THE EUXENITE-GROUP MINERALS AND PRODUCTS OF THEIR ALTERATION... Poland ABSTRACT Polycrase-(Y) and euxenite-(Y) represent the euxenite-group minerals (EGM) that formed...formed as magmatic minerals in the sequence of (Y,REE,U,Th)ā(Nb,Ta,Ti) oxides: columbite-(Fe) Ti-bearing...ixiolite 6 ferrowodginite samarskite-group minerals [ishikawaite samarskite-(Y)] EGM in the moderately...results mainly from substitution along the A(U,Th)BTiA(Y,REE)ā1B(Nb,Ta)ā1 vector. Metasomatic alteration of | | Nakai, Izumi, Akimoto, Junji, Imafuku, Masayuki, Miyawaki, Ritsuro, Sugitani, Yoshinori, Koto, Kichiro (1987) Characterization of the amorphous state in metamict silicates and niobates by EXAFS and XANES analyses. Physics and Chemistry of Minerals, 15 (2) 113-124 doi:10.1007/bf00308773 | Journal (article/letter/editorial) | around Y, Zr and Nb atoms in metamict zircon, gadolinite, fergusonite, euxenite and samarskite. EXAFS...atoms in metamict euxenite and samarskite resemble those in the crystalline euxenite. Compared with crystalline...metamict zircon and samarskite with high trivalent iron concentration. Nb in metamict samarskite is in octahedral...coordination by oxygen and is similar to that in euxenite. Introduction A large number of studies have...absorption spectra of metamict fergusonite, aeschynite, euxenite and zircon were measured by a vacuum focusing | | | Journal (article/letter/editorial) | lithiumāfluoric granites of the Far East Chukotka Amur River area Component SiO2 CaO Sc2O3 TiO2 MnO FeO* As2O3 Y2O3...14 19 n 9 26 7 9 52 Si Ca Sc Ti Mn Fe As Y Pb Bi Th U Yb ā ā 0.01 0.02 0.17 0.72 ā ā ā ā ā ā...1.19 0.90 1.19 0.96 Smrs is samarskite(Yb), Frg is fergusonite(Y); for other symbols, see figure...0ā11.82 ā 1.71ā28.89 ā 19 8 3 Aesh is aeschynite(Y) and Rtl is rutile; for other symbols, see figure...ishikawaite, ferguso niteā(Y), aeschiniteā(Y), liandratite, columbiteā (Fe), and euxeniteā(Y) (Fig. 1, Table 1) | | | Journal (issue) | Complex, Wausau Syenite Compley, Marathon County, Wisconsin, USAā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦..21 DOLGOPOLOVA, A.,...Emmons pegmatite, Greenwood, Oxford Co., Maine, USA: implication for the origin of this unusual para...(Maine, USA)ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦37 GUASTONI, A., GENTILE, P., NESTOLA, F., ZORZI, F. Pb-rich agardite-(Y) and...on the crystal chemistry and classification of samarskite group mineralsā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦ā¦...approach to lithium exploration in the Barroso-AlvĆ£o area, northern Portugalā¦ā¦ā¦ā¦..72 MALCZEWSKI, D., DZIUROWICZ | | | Book | phases like columbite-tantalite, fergusonite, samarskite, allanite, monazite, thorite, bastnaesite and...notably the xenotime concentrations in the Kanyaluka area along the eastern end of the SSZ. Chapter 7 provides... . . . . . . . . . . . . . 3.3.1 Ranchi-Purulia Area, Jharkhand and West Bengal . . 3.3.2 Simdega District...Carbonatite, Karbi-Anglong District, Assam . . 4.5.4 Sung Valley Carbonatite, Jaintia Hills District, Meghalaya.... . . . . . . . . . . 4.6.6 Syenites, Dancherla Area, Anantpur District, Andhra Pradesh . . . . . . | | | Journal (article/letter/editorial) | Ihe Pikn P c i l Balhdilh dates for rocks in this area rnngc from I .7 to I .8 billion years. The zone...metasediments and metavolcanics were originally named the Idaho Springs Formation, but now they are referred to...Event Beginning about 1.47 billion years ago, the area was again intruded by numerous plutons. Some researchers...Batholith Figure 5. Topaz from Crystal Park, El Paso County. Crystal is 3.1 cm tall. George and Betty Fisher...is 75.5 percent, whereas a gabbro in the Tarryall area contains only 43.9 percent silica. With respect | | | Book | Published by Schiffer Publishing, Ltd. 4880 Lo\:ver Valley Road Atglen, PA 193 10 Phone: (610) 593-1777; Fax:...The treatment of historical details makes for highl y classic localities. Uraniun, and Lhorium mineralogy...tri1nn1ing a san1ple. and thoroughly clean the \\'Ork area afterv.rards. Avoid displaying specimens on an open...n1ake use of depleted uranizan, which is essentiall y a very slightly radioactive waste product that re111ains...studied. There are three predon1inant nat11 rall y occurring isotopes of uraniun1 and thoriun1, 238 U | | | Journal (article/letter/editorial) | elsevier.com/locate/lithos Y,REE,Nb,Ta,Ti-oxide (AB2O6) minerals from RELāREE euxenite-subtype pegmatites of...Aeschynite-group minerals (AGM) and euxenite-group minerals (EGM) occur in RELāREE euxenite-subtype pegmatites from...are not commonly associated with the other primary Y,REE,Ti,Nb-bearing minerals, i.e. allanite-(Ce), monazite-(Ce)...within the same textural-paragenetic unit. Aeschynite-(Y), aeschynite-(Ce), aeschynite-(Nd), nioboaeschynite-(Ce)... tantalaeschynite-(Ce), vigezzite and polycrase-(Y) were identified using EMP and canonical discrimination | | | Journal (article/letter/editorial) | predominantly correlate with the distribution of Y and HREE in the crystals. It is presumably the first...from magmatic garnet originating from one area. The average Y and HREE concentrations are related to the...intracrystalline zoning reflects the absence or presence of Y-bearing minerals or, in the case of the Slobrekka...diffusion-controlled crystal growth. Sharp drops of the Y and HREE content record the abrupt change of ānormalā...wider range of chemical variability and patterns of YāHREE zoning compared to the Froland samples. Thus | | | Report (issue) | -4H20 Niobates-tantalates-titanates: Ampangabeite (Y, Er, U, Ca, Th)2 (Nb, Ta, Fe, Ti) 7Oi8 Betafite (U...Brannerite Perhaps A3B6Oi6 with A=U, Ca, Fe, Th, Y, and B = Ti. Calciosamarskite (Ca, X, U, Th) 3 (Nb...Delorenzite (Y, U, Fe2)(Ti, Sn) 303 ? Eschynite (Ce, Ca, Fe2, Th) (Ti, Nb)209 Euxenite (Y, Ca, Ce, U,...(Nb, Ta, Ti)20Ā« Fergusonite (Y, Er, Ce, Fe)(Nb, Ta, Ti)O4 Formanite (Y, U, Th, Ca)(Ta, Nb, Ti)04 Irinite...(U, Fe, X)(Nb, Ta)04 [X=rare earths] Khlopinite (Y, U4, Th) 3 (Nb, Ta, Ti, Fe) 7020 ? Microlite Essentially | | | Book (edition) | Tonopah-Belmont mine, Maricopa County; ca1cioaravaipaite from the Grand Reef mine, Graham County; carmichaelite from...from Gamet Ridge, Apache County; shannonite from the Grand Reef mine, Graham County; wupatkiite from near...Mountain, Coconino County, and grandviewite from the Grandview mine, Coconino County. A few of the additional...uranium deposits on the Colorado Plateau. Coconino County: near Tuba City (Anthony et aI., 2000). ACANTHITE...sulfide found with other copper sulfides. Greenlee County: found in the supergene alteration zone at Morenci | | | Report (volume) | recently found in the Tenmile district, Summit County. In his booklet, which today would be classed as...feldspar, and mica, occur in some form in every county in the State. Among mineralogists, Colorado is...mineral belt that extends southwestward from Boulder County to the southern limits of the San Juan Mountains... lefferson County, the contact-metamorphic minerals of Italian Mountain, Gunnison County and elsewhere...minerals in the alkalic rocks of Iron Hill, Gunnison County. Colorado pegmatite bodies, considered as a unit | | | Journal (volume) | Dmitrii V. Runskvist Victor T. Trofimov Marie Huizing (USA) Terry E. Huizing Managing Editor Ludmilla A. Cheshko...Pictures Ltd. 4871 S. Dudley St., Littleton CO 80123 USA E-mail: minbooks@online.ru Web-site: www.minbook........ . . 12 2. GEOLOGY OF THE ILMENY MOUNTAINS AREA .... ... . . . .. 30 3. TYPES OF THE PEGMAmES: ...the gold-bearing lode and placer deposits in Gold Valley near the town of Miass. Following futile attempts...1700s in the search for minerals, and since 1920 the area has been set aside as a nature preserve where minerals |
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