 | 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) | | minerals of Nb, Ta, Sn, and Sb in the Varuträsk granitic pegmatite, Sweden: The case of an “anomalous” columbite-tantalite... SE-752 36 Uppsala, Sweden 1 ABSTRACT The complex, petalite-subtype Varuträsk pegmatite in the Proterozoic...Proterozoic rocks of northern Sweden is, as a whole, rather poor in Nb and Ta. The pegmatite consolidated...Consequently, the compositional trends of columbite-group minerals and cassiterite mimic those typically displayed...pegmatites. The degree of cation order in the Varuträsk columbite-group minerals increases from early to late |  | | Journal (article/letter/editorial) | | first identified in 1938 in lithium pegmatites of Sweden in association with petalite, spodumene, and lepidolite...7.18 4.91 2.12 0.33 11.30 15.61 ^ Varuträsk, Sweden (Groat et al., 1987; Cern y′ et al., 2004)...LOCALITIES According to the nomenclature of the pyrochlore mineral group with the formula A2B2O6(O,OH,F), the microlite...Peretyazhko, 1992) 0.20 0.15 0.24 Na Varuträsk, Sweden (Groat et al., 1987; C ern y′ et al., 2004)...Sn, and Sb in the Varutrásk Granitic Pegmatite, Sweden: The Case of an “Anomalous” Columbite–Tantalite |  | | Journal (article/letter/editorial) | | Mn-Fe and Ta-Nb fractionation in the columbite group and crystallization sequences in the primary assemblage...alteration. The columbite-group minerals were altered to fersmite, pyrochlore, and bismutopyrochlore locally...Bi-dominant betafite. In all of the secondary pyrochlore-group minerals, Ta-Nb fractionation is comparable...stibiocolumbite, stibiotantalite, holtite, fersmite, pyrochlore-group minerals, fractionation trends, Szklary pegmatite...Pb-dominant analogues of dickinsonite (arrojadite group), MnAs2O4, Al4As2O9, and Mn3UAs2Sb2Ta2Ti2O20. In |  | | Journal (volume) | | .. .. .. . . .. .. .. . . . . .. .. Tourmaline group .. ............ . ......... . ........................ .. ............. Minerals of the monazite group . . . . . . . . . . . . . . . . . . . . . . . ....different extinction in thin section. Tourmaline group The commonest of the Haapaluoma tourmalines is schorlite... 3.155 ± 0.003 Densitycalc. 3.19 3 gjcm3 Space group C2jc The optical properties: a = 1.659} ß=1.664...Haapaluoma xenotime to belong to the 1850-1950 m.y. age group. This age has been obtained for most of the Svecofennian |  | | Journal (article/letter/editorial) | | pegmatite, namely the (Nb,Ta,Ti) oxides (wodginite group, tantalite), phosphates (amblygonite–montebrasite...interests in Scandinavia, in particular in Sweden (e.g., Utö, Varuträsk) in the mid-1990s, then in Slovakia...(columbite group, wodginite group, pyrochlore group, tapiolite group, rutile group, stibiotantalite group, ixiolite...ixiolite group, foordite–thoreaulite series), primary phosphates (amblygonite–montebrasite series, tr...triphylite–lithiophilite series, graftonite group, phosphates of Y and the rare-earth elements, Be-bearing |  | Gonçalves, , Melgarejo, , Alfonso, , Amores, , Paniagua, , Neto, , Morais, , Camprubí, (2019) The Distribution of Rare Metals in the LCT Pegmatites from the Giraúl Field, Angola. Minerals, 9 (10) 580 doi:10.3390/min9100580 | Journal (article/letter/editorial) | | and Bi. Keywords: pegmatites; columbite-group minerals; pyrochlore supergroup; niobium; tantalum; beryllium;...exception of some scarce crystals of the columbite-group minerals (CGM) and They have variable dimensions...detail some slightly more evolved pegmatites of the group, where fine albite veins appear and replacement...exception of someinscarce crystals of theascolumbite-group minerals and rareand elements. Other common minerals...in some slightly more evolved pegmatites of the group, where fine albite veins appear and these pegmatites |  | Novak, M., Cerny, P., Cempirek, J., Srein, V., Filip, J. (2004) FERROTAPIOLITE AS A PSEUDOMORPH OF STIBIOTANTALITE FROM THE LASTOVICKY LEPIDOLITE PEGMATITE, CZECH REPUBLIC; AN EXAMPLE OF HYDROTHERMAL ALTERATION AT CONSTANT Ta/(Ta + Nb) The Canadian Mineralogist, 42 (4) 1117-1128 doi:10.2113/gscanmin.42.4.1117 | Journal (article/letter/editorial) | | Niobium–tantalum oxide minerals are represented by columbite-group minerals, stibiotantalite, ferrotapiolite and very...al. 2004), and they were also retained in pyrochlore-group minerals during geochemical alterations (Lumpkin...minerals of Nb, Ta, Sn and Sb in the Varuträsk granitic pegmatite, Sweden: the case of an “anomalous” columbite–tantalite...Structural crystallography of the stibiotantalite group: a compositionally-dependent ferroelectric phase...species, and its structural relationship to the pyrochlore group. Can. Mineral. 24, 655-663. FOORD, E.E. (1976): |  | | Journal (article/letter/editorial) | | Nb-Ta in these types of deposits are the columbite group minerals (columbite-tantalite), but at some ore...rare-metal pegmatites. Magmatic origins for columbite group minerals are well constrained, but hydrothermal...minerals in these associations are pyrochlore group and columbite group minerals (CGM). The most important...carbonate) + HFSE minerals such as CGMs and pyrochlore group minerals Alkaline complexes2,7,9 Peralkaline...± HFSE minerals such as eudialyte, zircon, pyrochlore group minerals Ta and Nb (economic in columbite-tantalite |  | Atencio, D., Andrade, M. B., Christy, A. G., Giere, R., Kartashov, P. M. (2010) The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist, 48 (3) 673-698 doi:10.3749/canmin.48.3.673 | Journal (article/letter/editorial) | | 673-698 (2010) DOI : 10.3749/canmin.48.3.673 THE PYROCHLORE SUPERGROUP OF MINERALS: NOMENCLATURE Daniel ATENCIO§...Abstract A new scheme of nomenclature for the pyrochlore supergroup, approved by the CNMNC–IMA, is based...referred to until now as the pyrochlore group should be referred to as the pyrochlore supergroup, and the subgroups...Ta, Sb, Ti, and W. The recommended groups are pyrochlore, microlite, roméite, betafite, and elsmoreite...and one root name (identical to the name of the group). The first prefix refers to the dominant anion |  | Novák, Milan, Sejkora, Jiří, Škoda, Radek, Budina, Václav (2008) Bismutotantalite-stibiotantalite-stibiocolumbite assemblage from elbaite pegmatites at Molo near Momeik, northern Shan State, Myanmar. Neues Jahrbuch für Mineralogie - Abhandlungen, 185 (1) 17-26 doi:10.1127/0077-7757/2008/0108 | Journal (article/letter/editorial) | | Bismuth-dominant minerals of the stibiotantalite group (general formula ABO4, where A = Sb,Bi and B = Nb...Bismuth-dominant or Bi-rich members of the stibiotantalite group are compositionally quite heterogeneous and exhibit...of petalite instead Li-micas and absence of pyrochlore group minerals as well. 19 Textural relations...replaced by Nb-rich member of the stibiotantalite group – stibiocolumbite; however, the textures showing...overgrowths. Disregarding intensive searching, no pyrochlore group minerals were detected in this assemblage |  | | Journal (article/letter/editorial) | | in the Navasfrías Sn–W district, in Spain, are a group of Li-rich LCT rare-element pegmatites hosted by...minerals, such as those of the columbite–tantalite group, tapiolite-(Fe) and microlite. It is possible to...dikes. Keywords: microlite, columbite–tantalite group, tapiolite, cassiterite, granitic pegmatites, lepidolite...Jálama batholith (Moro & Llorens 2008) and in a group of Li-rich pegmatite dikes related to the Cadalso...minerals belonging to the columbite–tantalite and pyrochlore groups within the lepidolite, topaz and montebrasite |  | | Book | | from minerals found in the pegmatite at Ytterby, Sweden. Both supposed oxides were later found to be mixtures...eourse of analyzing pegmatite minerals from Ytterby, Sweden and Kimito, Finland. The new "element" was named...Ercit (with 21 Figures) . . . . . . 3 27 Pyrochlore Group Minerals from the Qaqarssuk Carbonatite Complex...fractures in altered greenstones from San Benito County, California, is reported with 20.57 wt.% RE2 0...International Mineralogical Association (IMA). A group name, bastnaesite, for instance, is proposed for |  | Chudík, Peter, Uher, Pavel, Gadas, Petr, Škoda, Radek, Pršek, Jaroslav (2011) Niobium-tantalum oxide minerals in the Jezuitské Lesy granitic pegmatite, Bratislava Massif, Slovakia: Ta to Nb and Fe to Mn evolutionary trends in a narrow Be,Cs-rich and Li,B-poor dike. Mineralogy and Petrology, 102 (1) 15-27 doi:10.1007/s00710-011-0163-9 | Journal (article/letter/editorial) | | show decreasing of Ta# in comparison to the 1st group: 0.10−0.60 (Ct II), 0.85−0.87 (Tap II) and 0.73−0...fluorcalciomicrolite, all four members of the columbitetantalite group were detected here (Table 1). Moreover, compositional...besides the more widespread columbite-tantalite group minerals in the Jezuitské Lesy pegmatite. The occurrences...found in the ferrotantalite I (Table 3). The second group of columbite-tantalite (Ct II) is represented mainly...of the three generations (I to III) of columbite-group minerals (Ct) and ferrotapiolite (Tap) from the |  | Beurlen, Hartmut, Da Silva, Marcelo R. R., Thomas, Rainer, Soares, Dwight R., Olivier, Patrick (2008) Nb–Ta–(Ti–Sn) oxide mineral chemistry as tracer of rare-element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil. Mineralium Deposita, 43 (2) 207-228 doi:10.1007/s00126-007-0152-4 | Journal (article/letter/editorial) | | niobian– tantalian rutile, ixiolite and wodginite group minerals from 28 pegmatites in the BPP are used...fractionation and to classify the pegmatites. The columbite group mineral composition allows to establish a compositional...columbite, ixiolite, tapiolite wodginite and rutile group minerals from 33 different pegmatites (including...Seridó Formations of the Neoproterozoic Seridó Group (Van Schmus et al. 2003). The formation of the mineralized...sequence. The regional metamorphism of the Seridó Group reached the low pressure–high temperature Abukuma-type |  | | Book (edition) | | terms (see also explanations chapter): - Strunz Group (Strunz (2001; version 9); this provides the mineralogical...optical characteristics or shapes. - The Point Group illustrates how symmetrical a particular mineral...minerals which appear within a particular Strunz sub-group (listed here) or in mineral assemblages of a closely...fast overview and reflect the abbreviated Strunz group. • Where necessary, abbreviations for important...scheme reflects compositional systematics; the main group is colour-coded on the top right page of the descriptions; |  | | Journal (volume) | | 1\1ineralogical Institute of the University of Lund , Sweden, and Professor Hans Pettersson, 6 Bullcti n...of the Oeeanographieal Institute in Gothenburg, Sweden, have very generously furnished me with sampies...decomposition of the rocks and minerals belonging to this group , the fusion with sodium carbonate was used, the...Ais present in a large excess over B. The first group comprises methods based on the formation of soluble...(B) being insoluble. In the methods of the second group , on the contrary, Ais preeipitated from the common |  | Melcher, Frank, Graupner, Torsten, Gäbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, Oberthür, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | 3 ACCEPTED MANUSCRIPT Melcher et al. 6.1. Pyrochlore-supergroup minerals 6.2. Bismutotantalite [Bi(Nb...granitic rare-element IP pegmatites. Columbite-group minerals (CGM) account for the majority of the current...tapiolite, wodginite, ixiolite, rutile SC R and pyrochlore-supergroup minerals may also be used. In this...rare-element pegmatites (Černý et al., 2005). Columbite-group minerals (columbite-tantalite solid solution series;...members of the orthorhombic columbite-tantalite group (CGM) with the general formula AB2O6 (A = Fe2+, |  | | Journal (issue) | | Stettin Complex, Wausau Syenite Compley, Marathon County, Wisconsin, USA……………………………………………..21 DOLGOPOLOVA...crystal chemistry and classification of samarskite group minerals………………………………………………………………………………………………………………………………...Mineralogy and geochemistry of the Rau pegmatite group, Yukon Territory, Canada………..126 SIMMONS, W.B....cavities in the Havey pegmatite, Poland, Androscoggin County, Maine, USA…………………………………………………………………………173 WISE...southern Norway and adjacent parts of southwestern Sweden (Fig. 1) is the product of a series of crustal |  | | Book | | would make available a much needed book— to a large group of scientists, but also because their help showed...Larger additions have been made in the algodonite group and in the section on valleriite. The writer has...Moreover, the complete description of a paragenetic group such as the Co-Ni-Ag-As deposits, which are fundamentally...structure and occurrence of Quartz alone in just one group of ore deposits (the gold-quartz deposits), and...learn to regard rocks unreservedly as a special group of mineral deposits. I. P L U T O N I C R O C K |
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