 | Balassone, Giuseppina, Danisi, Rosa Micaela, Armbruster, Thomas, Altomare, Angela, Moliterni, Anna Grazia, Petti, Carmela, Mondillo, Nicola, Ghiara, Maria Rosaria, Saviano, Michele (2015) An insight into crystal chemistry and cation order of columbite-(Fe) and columbite-(Mn) from worldwide occurrences. Neues Jahrbuch fĂŒr Mineralogie - Abhandlungen: Journal of Mineralogy and Geoche, 192 (3) 275-287 doi:10.1127/njma/2015/0285 | Journal (article/letter/editorial) | | crystal chemistry and cation order of columbite-(Fe) and columbite-(Mn) from worldwide occurrences Giuseppina...electronic supplement Abstract: A set of nine columbite samples (Fe,Mn)(Nb,Ta)2O6, preserved in the Mineralogical...the samples are columbite-(Fe), except for two samples corresponding to columbite-(Mn). For seven samples...refinements showed that five samples displayed strong (Fe,Mn)2+ vs. (Nb,Ta)5+ disorder at the two octahedral sites...The octahedral coordination of (Nb, Ta)5+ in columbite is characterized by out-of-center distortion, |  | Loun, Jan, NovĂĄk, Milan, CempĂrek, Jan, Ć koda, Radek, VaĆĄinovĂĄ GaliovĂĄ, Michaela, ProkeĆĄ, LubomĂr, Dosbaba, Marek, ÄopjakovĂĄ, 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) | | (microlite ĂŸ U-enriched microlite) . columbite-group minerals (columbiteâtantalite), wodginite ĂŸ ferrotapiolite;...(berylcolumbite subtype) microlite . cassiterite, columbiteâtantalite ĂŸ wodginiteâferrowodginite. Both pegmatites...Melcher et al. 2015); hence, columbite-group minerals (henceforth columbiteâtantalite), microlite-group...pegmatitic melt or as a replacement product of columbiteâ tantalite, ferrotapiolite, stibiotantalite, simpsonite...microlite to U-enriched microlite along with minor columbiteâtantalite and wodginite s.l. as the main economic |  | Graupner, T., Melcher, F., GĂ€bler, H.-E., Sitnikova, M., BrĂ€tz, H., Bahr, A. (2010) Rare earth element geochemistry of columbite-group minerals: LA-ICP-MS data. Mineralogical Magazine, 74 (4) 691-713 doi:10.1180/minmag.2010.074.4.691 | Journal (article/letter/editorial) | | 691â713 Rare earth element geochemistry of columbite-group minerals: LA-ICP-MS data T. GRAUPNER1,*...ACT New data on rare earth element (REE) concentrations and distribution patterns of columbite-tantalite...chondritenormalized REE distribution patterns are defined for columbite-group minerals (CGM) from lithiumcaesium-tantalum...melt in a pegmatite body (either Nb ? Ta or Fe ? Mn fractionation lines, or both) results in smaller...forensic tool). K EY WORDS : LCT family pegmatites, columbite-tantalite, REE geochemistry, LA-ICP-MS data. |  | Galliski, Miguel Ăngel, MĂĄrquez-ZavalĂa, MarĂa Florencia, ÄernĂœ, Petr, Lira, RaĂșl (2016) Complex Nb-Ta-Ti-Sn Oxide Mineral Intergrowths In The La Calandria Pegmatite, Cañada Del Puerto, CĂłrdoba, Argentina. The Canadian Mineralogist, 54 (4) 899-916 doi:10.3749/canmin.1500095 | Journal (article/letter/editorial) | | Devonian granitic pegmatites at the La Calandria mine, CanÌada del Puerto, shows complex intergrowths...achalaite, ferrotitanowodginite, Ta-rich rutile, columbite-(Mn), ixiolite, and fluorcalciomicrolite. The chemical...Ta and a clearly defined predominance of Fe over Mn, with minor participation of Ti, Sn, and W. The minerals...of the pegmatite and, less commonly, local columbite-(Mn) in the inner part. Subsolidus unmixing of ixiolite...overprint produced peripheral transformation of columbite-(Mn) to possibly achalaite III and widespread distribution |  | | Journal (article/letter/editorial) | | that enlarges the original cavities and creates new ones. Miarolitic pegmatites of either NYF and LCT...series, pollucite, tantalite-(Fe) and tantalite-(Mn), i.e., super-LCT deposits. Keywords: granitic pegmatite...inward, and give way in the intermediate zone to Mn-enriched fluorapatite. At the core margin, pods of...the NYF affiliation, like El Muerto, in Oaxaca, Mexico (Prol-Ledesma et al. 2012), the border zone contains...generation of pyrochlore, betafite, fersmite and columbite, as well as a very late Ta-dominant mineral, microlite |  | | Journal (article/letter/editorial) | | PLUTON OF THE WAUSAU SYENITE COMPLEX, MARATHON COUNTY, WISCONSIN Alexander U. FALSTER§ Department of...and Environmental Sciences, University of New Orleans, New Orleans, Louisiana 70148, U.S.A. Thomas W...and Environmental Sciences, University of New Orleans, New Orleans, Louisiana 70148, U.S.A. Abstract...Wausau syenite complex, exposed in central Marathon County, Wisconsin, is an A1-type within-plate granitoid...is associated with late-stage Ta and Mn enrichment in columbiteâtantalite species and Hf enrichment in |  | Feng, Yonggang, Liang, Ting, Linnen, Robert, Zhang, Ze, Zhou, Yi, Zhang, Zhongli, Gao, Jinggang (2020) LA-ICP-MS dating of highâuranium columbite from no. 1 pegmatite atDakalasu, the Chinese Altay orogen: Assessing effect of metamictization on age concordance. Lithos, 362. 105461 doi:10.1016/j.lithos.2020.105461 | Journal (article/letter/editorial) | | Journal Pre-proof LA-ICP-MS dating of high-uranium columbite from no. 1 pegmatite at Dakalasu, the Chinese...Linnen, et al., LA-ICP-MS dating of high-uranium columbite from no. 1 pegmatite at Dakalasu, the Chinese... Journal Pre-proof LA-ICP-MS Dating of high-uranium columbite from No. 1 pegmatite at Dakalasu, the Chinese...Abstract High-uranium (~ 4200 to 8500 ppm U) columbite-group minerals (CGMs) from No. 1 pegmatite at...CGM. pr Raman spectroscopy indicates that the columbite samples are metamictized to various e- extents |  | Falster, Alexander U., Simmons, William B., Webber, Karen L., Dallaire, Donald A., Nizamoff, James W., Sprague, Raymond A. (2019) The Emmons Pegmatite, Greenwood, Oxford County, Maine. Rocks & Minerals, 94 (6) 498-519 doi:10.1080/00357529.2019.1641021 | Journal (article/letter/editorial) | | in 1996. THE EMMONS PEGMATITE Greenwood Oxford County, Maine The Emmons pegmatite, noted for its many...edu DONALD A. DALLAIRE 829 Candia Road Chester, New Hampshire 03036 dadallaire@hotmail.com JAMES W....research. The relocation of our laboratory in 2014 from New Orleans, Louisiana, to Bethel, Maine, greatly facilitated...slope of Uncle Tom Mountain in Greenwood, Oxford County, Maine. At times, the Emmons pegmatite has been...Maine (Perham 1987). Figure 2. General geology of New England (after Brown and Solar 1998). SMD = Sebago |  | Martins, T., Lima, A., Simmons, W. B., Falster, A. U., Noronha, F. (2011) GEOCHEMICAL FRACTIONATION OF Nb-Ta OXIDES IN Li-BEARING PEGMATITES FROM THE BARROSO-ALVAO PEGMATITE FIELD, NORTHERN PORTUGAL. The Canadian Mineralogist, 49 (3) 777-791 doi:10.3749/canmin.49.3.777 | Journal (article/letter/editorial) | | Environmental Sciences, University of New Orleans, New Orleans, Louisiana 70148, USA Fernando NORONHA Geology Centre...mineralization and mineral associations. Minerals of the columbiteâtantalite group are found in all the LCT (LiâCsâTa)...In the petalite and lepidolite pegmatites, the columbiteâtantalite group of minerals are found spatially...spodumene pegmatites. The columbite-group minerals have Ta/(Ta + Nb) and Mn/(Mn + Fe) values ranging from...pegmatites, where Mn/(Mn + Fe) is close to 1. The fractionation trend starts in the Mn-poor columbite-(Fe) field |  | | Journal (article/letter/editorial) | | Cassiterite tantalum orebody in the Wodgina pegmatite district. Generally, rare metal pegmatites in the province...Cassiterite pegmatite orebodies in the Wodgina district (Fig. 1). The Mount Cassiterite deposit contains...previous work by Blockley (1980) but also includes new work in the Wodgina and Pippingarra districts. Geologic...Corunna Downs, CH = Chiratta, D = Dampier, H = Harding, K = Kurrana, ME = Mount Edgar, MU = Muccan, P...pegmatite districts. In the Wodgina pegmatite district, for example, there are seven pegmatite groups |  | Melcher, Frank, Graupner, Torsten, GĂ€bler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, OberthĂŒr, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalumâ(niobiumâtin) mineralisation in African pegmatites and rare metal granites: Constraints from TaâNb oxide mineralogy, geochemistry and UâPb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | 1.2. Mineralogy NU 5. Mineral chemistry of columbite-tantalite, tapiolite, wodginite and ixiolite in...processes and sources 7.2. Compositional variation of columbite-tantalite, tapiolite and wodginite-ixiolite 7...granites and granitic rare-element IP pegmatites. Columbite-group minerals (CGM) account for the majority...(Zimbabwe) and the Jos Plateau (Nigeria). Mn-rich columbite-tantalite is typical of the Alto Ligonha Province...Namibia). Large compositional variations through Fe-Mn fractionation, followed by Nb-Ta fractionation are |  | | Journal (article/letter/editorial) | | Abstract Tapiolite [FeTa2O6] and columbite-group minerals [(Fe,Mn)(Ta,Nb)2O6] are common Nb-Ta-bearing...compositional gap. In this study, tapiolite and columbite-group minerals (CGM) were crystallized from water-saturated...between a rutile-structured component Fe3+TaO4 and (Fe,Mn)Ta2O6. The experimental CGM-tapiolite compositional...pegmatite), which is below saturation values for columbite and tantalite. Supercooling is thus invoked to...common Nb-Ta mineral association. The columbite-group minerals (Fe2+,Mn)(Nb,Ta)2O6 consist of a solid solution |  | | Journal (article/letter/editorial) | | 0.58 0.05 0.86 ND Element, ppmw Be Li Rb Cs B F Mn Nb Ta 39 3440 1160 580 1924 13,000 b465 51 24 169...Rubicline Pollucite Tourmaline Topaz Spessartine Mn-columbite Mn-tantalite ~500 °C ~390 °C ~525 °C ~525 °C...2001a); spessartine (London et al., 2001b); Mn-columbite and Mn-tantalite (Linnen and Cuney, 2005). e Calculated...and maïŹc phosphates, between spessartine (Mn-rich garnet) and Mn-phosphates, and between lithium aluminosilicates...shows the concentrations of Be, Li, Rb, Cs, B, F, Mn, Nb, and Ta in the Tanco pegmatite, Manitoba, corrected |  | | Book | | Books Ltd. PO. Box 1338, Ellicott Station Buffalo, New York 14205 66 Leek Crescent Richmond Hill, Ontario...destroyed in these changing conditions. In the process, new minerals and rocks are formed. RIGHT: Malachite...be minerals. Microcline, Crystal Peak, Colorado, USA * 12 x 9x 5 om MINERALS: PRODUCTS OF A CHANGING...CHANGING PLANET 11 Vanadinite, San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 cm Mineral Species Minerals...zeolites. Calcite (septarian nodule), San Juan County, Utah, USA * 18 x 24x Bem 14 | MINERALS: PRODUCTS |  | | Journal (issue) | | Scovil photo. Vanadinite, 2.4 cm, from the Apache mine, Arizona. Collected by Evan Jones; Jeff Scovil photo...Miglioli photo. Fluorite, 7.4 cm, from the La Barre mine, France. Collected by Aubin Cosson; Niels Brouwer... from left: Caledonite, 1.1 cm, from the Reward mine, California. Collected by Jeff Lines; Ben DeCamp...Thrill of Discovery by Wendell Wilson Epilog: On Mine Safety UThe Field-CollectorsV Anthony J. Albini...the words of the original discoverers. Adelaide Mine, Tasmania, 1971, 2012 Albert Chapman wrote one such |  | | Journal (article/letter/editorial) | | syenite associated with carbonatite. Pyrochlore, columbite-Mn, and Ca-niobates occur in calc-alkalic granites...Al,Mn) Ti Si O , with perfect substitution in (REE,Ca,Th) (REE,Ca,Th)44Fe Fe2+(Fe3+,Fe ,Ti,Al,Mn)2Ti...13REE0.34-0.40(Fe,Ca,Mn,Mg)0.22â calculated on basis of seven oxygen atoms, (Y (Fe,Ca,Mn,Mg) calculated on...seven oxygen atoms, (Y0.97â1.13 REE0.34-0.40(Fe,Ca,Mn,Mg) 0.22â 0.97â1.13 0.34â0.40 0.22â0.34 0.34(Th,U)0...Ca, Mn, Mg). Data to Y + REE and Th + U, respectively. 2+ are large divalent cations (Fe, Ca, Mn, Mg) |  | | Journal (issue) | | GIA-trained jeweler advises client on 5 carat solitaire. NEW YORK 7:00 AM Diamonds Graduate negotiates purchase...: 3 0 P M Core gem curriculum updated to reïŹect new research. Sales associate explains 4Cs to customer...log on to www.retailer.gia.edu CARLSBAD MOSCOW NEW YORK MUMBAI LONDON BANGKOK ANTWERP HONG KONG...Alan Jobbins Caterham, UK Thomas M. Moses New York, New York Mary L. Johnson San Diego, California...blaurs@gia.edu Christopher P. Smith New York, New York Wuyi Wang New York, New York Christopher M. Welbourn |  | | Book | | Cataloging-in-Publication Data are aYailable Typeset in Times New Romanand Helvetica Printedand bound by L.E.G.OSpA...House in Derbyshin: ( ooper 2005) and the promise of new mineral galleries in Edinburgh in '.!011. I hope...formal referencing, when I personally discovered new species to Britain and Ireland, and colleagues permitted...onNewMinerals,Nomenclature andClass::ication. Co. County. EMPElectronmicroprobe - an instrument usedto ...and wodginite). There would have been even more new information to report but for the 13-year gestation |  | | Book (edition) | | MINE andtheir LOCALITIES JAN H. BERNARD AND JAROSLAV HYRSL INERALS DESCRIBED SINCE 2004 MINERALS...dist., China Fluomatromicrolite, x 25111111, Naipa mine, Mozambique Daliranite, 5111111, Zarshouran Au-As...Domafov, Czech Rep. Juangodoyite, 60111111, Santa Rosa mine, Chile Back cover photo: Ho/fertile on hematite...piment pseudomo,phs after realga,; 75 mm, Palomo mine, Pen, Page 3: Stepite on arsenic, 45 111111,Jachymov...appendix containing new minerals described in 2004--2006. This present book comprehends new minerals published |  | | Book (volume) | | 1007/978-94-007-7128-4 Springer Dordrecht Heidelberg New York London Library of Congress Control Number: 2013955742...30-year work of the author during which about 150 new minerals have been discovered. The library contains...modern trends in IR spectroscopy of minerals and some new data and approaches are discussed. The general theory...individuality of numerous new mineral species approved by the IMA Commission on New Minerals, Nomenclature...Đ3Đ+, K, Sr, REE, Y, Ba, Mn, Ca; M(1) ÂŒ Ca, Mn, REE, Na, Sr, Fe; M(2) ÂŒ Fe, Mn, Na, Zr, Ta, Ti, K, Ba, |
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