 | | Journal (article/letter/editorial) | | nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana A. R. Chakhmouradian and R. H. Mitchell...1999 Summary The pegmatites at Pegmatite Peak (Bearpaw Mts., Montana) crystallized from an evolved fraction...[chevkinite-(Ce)]. Strontiochevkinite from Pegmatite Peak is compositionally similar to the type material...yon Pegmatite Peak, Bearpaw Mrs., Montana Die Pegmatite yon Pegmatite Peak (Bearpaw Mts., Montana) sind...Nb-reicher Mineralien aus. In den Proben von Pegmatite Peak sind drei Hauptphasen in der Entwicklung der |  | | Journal (article/letter/editorial) | | Montana Mineral Locality Index Downloaded by [University of Nebraska, Lincoln] at 20:00 09 April 2015...2015 K NOWN AS THE TREASURE STATE, Montana is rich in mineral and gemstone localities. The state motto...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University... the Rocky Mountains, and furthest to the northwest, the belt basin. The Rocky Mountains contain sedimentary |  | | Journal (article/letter/editorial) | | 7136--0.7158; Bearpaw Mountains, Montana (9), 0.7062--0.7086; Highwood Mountains, Montana (10), 0.7072--0...7094; Leucite Hills, Wyoming (17), 0.7055--0.7070; Montana diatremes (13), 0.7034--0.7073; Navajo Province...27 2 J.L. Powell and K. Bell: 4. Bearpaw Mountains, Montana (Weed and Pirsson, 1896; Larsen, 1940;...1962; Peeora et at., 1957). 5. Itighwood Mountains, Montana (Weed and Pi3'sson, 1895, 1901; Larsen, 1940;...Australia (Wade and Prider, 1940; Prider 1960). 8. Montana diatremes (Buie, 1941 ; Hearn, 1968). Sample Collection |  | | Conference Paper/Abstract | | associated alkaline rocks from Gordon Butte, Crazy Mountains (Montana) Roger H. Mitchell (Lakehead University)...Alkaline igneous rocks of central and western Montana (U.S.A.) exhibit a great petrographic diversity...Alkaline parageneses of different provenance from Montana have been shown to contain a variety of rare minerals...Mitchell 1999). Igneous lithologies of the Crazy Mountains area include a subalkaline series (gabbro-diorite-granite)...assemblages from the Gordon Butte area, northern Crazy Mountains. At Gordon Butte, four major intrusive series |  | | Journal (article/letter/editorial) | | Survey, 956 National Center, Reston, Virginia 20192, USA ABSTR ACT The composition of chevkinite and perrierite...Society from nepheline syenite pegmatites in Montana (Chakhmouradian and Mitchell, 1999), polyakovite...polyakovite, found in a dolomite vein in the Ilmen Mountains in the Urals, Russia (Popov et al., 2001), a Mg-Al-rich...analyses of chevkinite-group minerals from the western USA, Virginia, Russia, Malawi, Mali and Madagascar are...Tshirege Member of the Bandelier Tuff, Jemez Mountains, New Mexico, where it is associated with quartz |  | | Journal (article/letter/editorial) | | alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic...Springer-Verlag 2002 Abstract At Gordon Butte (Crazy Mountains, Montana), agpaitic nepheline±syenite pegmatites intrude...malignites and nepheline microsyenites). All pegmatite veins are composed predominantly of potassium...Alkaline igneous rocks of central and western Montana (USA) exhibit great petrographic diversity, and are...Alkaline parageneses of diÂerent provenance from Montana have been shown to contain a variety of rare minerals |  | | | | Geological Survey, 956 National Center, Reston, VA 20192, USA 4 Camborne School of Mines, School of Geography,...presented of chevkinite-group minerals from Canada, USA, Guatemala, Norway, Scotland, Italy and India. The...IMA-approved) include perrierite-(La) found in a syenitic pegmatite from BjĂžrkedalen, Oslofjord, Norway (Segalstad...perrierite-(Ca) perrierite-(Ca) 7 8 Pegmatitic Bearpaw Mts, Montana Burley Farm, Virginia BjĂžrkedalen, Norway...East Antarctica nepheline syenite granitoid pegmatite syenite cutting gneisses strontio-chevkinite |  | | Journal (article/letter/editorial) | | fluorapatite in a eudialyte-bearing nepheline syenite pegmatite. The overall compositional variation of these...kimberlite, associated with suolunite and barian phlogopite. In addition to Sr, the apatite is enriched in...intime avec une fluorapatite strontifĂšre dans une pegmatite de composition de syĂ©nite nĂ©phĂ©linique Ă eudialyte...kimberlite, en association avec suolunite et phlogopite enrichie en barium. En plus du Sr, lâapatite...ideally NaCeSr3(PO4)3F, is known from several pegmatite bodies in northwestern and southeastern Lovozero |  | Krivovichev, Sergey V., Armbruster, Thomas, Yakovenchuk, Viktor N., Pakhomovsky, Yakov A., Men'shikov, Yuriy P. (2003) Crystal structures of lamprophyllite-2M and lamprophyllite-2O from the Lovozero alkaline massif, Kola peninsula, Russia. European Journal of Mineralogy, 15 (4) 711-718 doi:10.1127/0935-1221/2003/0015-0711 | Journal (article/letter/editorial) | | Yakutia (Lazebnik et al., 1998), Pegmatite Peak, Bearpaw Mts., Montana (Chakhmouradian & Mitchell, 1999)...Oldoinyo Lengai, Tanzania (Dawson, 1998; Dawson & Hill, 1998), etc. A Ba-analogue of lamprophyllite, barytolamprophyllite...observed by Ferraris et al. (2001c) for phlogopite-2O and phlogopite-1M from the Khibiny alkaline massif...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineral. Petrol., 67, 85-110. Christiansen...Tanzania. J. Petrol., 39, 20772094. Dawson, J.B. & Hill, P.G. (1998): Mineral chemistry of a peralkaline |  | Macdonald, Ray, BagiĆski, BogusĆaw, Belkin, Harvey E., Stachowicz, Marcin (2019) Composition, paragenesis, and alteration of the chevkinite group of minerals. American Mineralogist, 104 (3) 348-369 doi:10.2138/am-2019-6772 | Journal (article/letter/editorial) | | site of an Fe-rich chevkinite-(Ce) from Mianning County, Sichuan, China, was given 2+ 2+ by Yang et al...inter alia, of perrierite-(Ce) from the Bearpaw Mountains, Montana, U.S.A. (0.35â1.18 apfu; Chakhmouradian...may be an artifact arising from Ti uncorrected for peak interference. Figure 9. La vs.Y plot to show that...described, from a fenitised granite in the Ilmen Mountains, southern Urals, Russia, a phase that they named...(dolomite) veinlet cross-cutting a phlogopite-olivine rock in the Ilmen Mountains (Popov et al. 2001). It is |  | | Journal (article/letter/editorial) | | by, and includes clasts of, a consanguineous phlogopite-rich pegmatitic facies. The olivine-rich parts...perovskite within a partially chloritized-to-fresh phlogopite-rich mesostasis. The rock lacks the abundant...large (1 5 mm) crystals of pinkish-bronze Al-poor phlogopite intergrown with and/or including: apatite; p...3177 presence of veins and clasts of pegmatitic phlogopite-rich rock set in a dark ïŹne-grained matrix. Chalapathi...olivine-phyric facies and a later, more evolved, phlogopite-rich pegmatitic FIG. 2. (a) The overall texture |  | Liferovich, R. P., Mitchell, R. H., Zozulya, D. R., Shpachenko, A. K. (2006) Paragenesis and composition of banalsite, stronalsite, and their solid solution in nepheline syenite and ultramafic alkaline rocks. The Canadian Mineralogist, 44 (4) 929-942 doi:10.2113/gscanmin.44.4.929 | Journal (article/letter/editorial) | | alkaline glimmerite, consisting of Ba-bearing phlogopite (1.8â2.2 wt.% BaO), prismatic clinopyroxene ...Ne: nepheline, Pe: manganoan pectolite, Phl: phlogopite, Sns: stronalsite, Sod: sodalite, St: strontianite...foyaite, Pilansberg complex, South Africa. augite, phlogopite, nepheline, microcline, analcime, and plagioclase...resulted in replacement (mantling) of primary phlogopite, diopside, andradite and nepheline by tetra-ferriphlogopite...postmagmatic parageneses in diverse ijolite units, phlogopite glimmerite, and alkaline pyroxenite contain hyalophane |  | Macdonald, R., BagiĆski, B., Kartashov, P., Zozulya, D., DzierĆŒanowski, P. (2012) Chevkinite-group minerals from Russia and Mongolia: new compositional data from metasomatites and ore deposits. Mineralogical Magazine, 76 (3) 535-549 doi:10.1180/minmag.2012.076.3.06 | Journal (article/letter/editorial) | | from the apical parts of granitic bodies) and a pegmatite (sample 5745b). Sample K3 is from borehole DH#...the Ilmen mountains, southern Urals. It was found in a dolomite veinlet cross-cutting phlogopite-olivine...CGM (sample K4) from a syenite pegmatite in vein 35, Vishnevye mountains, Chelyabinsk Oblastâ, which is...probe current was 20 nA. Counting times were 20 s on peak and 10 s on each of two background positions. The...chevkinite-(Ce) Mineral metasomatite dolomite vein pegmatite pegmatite apatite ore ores associated ores associated |  | Barkov, Andrei Y., Fleet, Michael E., Martin, Robert F., Men'shikov, Yuri P. (2006) Sr-Na-REE titanates of the crichtonite group from a fenitized megaxenolith, Khibina alkaline complex, Kola Peninsula, Russia: first occurrence and implications. European Journal of Mineralogy, 18 (4) 493-502 doi:10.1127/0935-1221/2006/0018-0493 | Journal (article/letter/editorial) | | nepheline, analcime, andalusite, corundum, topaz, phlogopite, quartz, rutile, various crichtonite-type phases...intergrowths, as revealed by powder-XRD scans. A phlogopite grain is nearly free of Fe and unusually rich...titanates from other localities Garnet Ridge, Arizona, USA (Wang et al., 1999). Landauite from the Burpala alkaline...from nepheline syenite pegmatites at Pegmatite Peak, Montana, USA (Chakhmouradian & Mitchell, 1999). Minerals...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts., Montana. Mineral. Petrol., 67, 85-110. Filippov |  | | Journal (article/letter/editorial) | | magnesiohastingsite, with subordinate schorlomite and phlogopite, are the earliest minerals to crystallize. Their...Na-bearing amphiboles and relative paucity of phlogopite reflect enrichment of the parental magma in Na...Keywords: clinopyroxene, amphibole, schorlomite, phlogopite, titanite, cerite-(Ce), chlorite, zircon, zirconosilicates...avec des quantitĂ©s moindres de schorlomite et de phlogopite, sont les minĂ©raux primaires prĂ©coces. Leur cristallisation...amphiboles contenant le Na et la raretĂ© de la phlogopite indiquent lâenrichissement du magma parental |  | KrmĂÄek, LukĂĄĆĄ, CempĂrek, Jan, HavlĂn, AleĆĄ, PĆichystal, AntonĂn, Houzar, Stanislav, KrmĂÄkovĂĄ, Michaela, Gadas, Petr (2011) Mineralogy and petrogenesis of a BaâTiâZr-rich peralkaline dyke from Ć ebkovice (Czech Republic): Recognition of the most lamproitic Variscan intrusion. Lithos, 121 (1) 74-86 doi:10.1016/j.lithos.2010.10.005 | Journal (article/letter/editorial) | | amphiboles, with accessory apatite and altered phlogopite. The microcline exhibits an unusual red luminescence...the assemblage K-rich amphibole + microcline ±phlogopite ± aegirine ± quartz have been encountered near...A few contacts between the dyke and an older pegmatite have been found. The dyke is at least 200 m long...each background corresponded to the one half of the peak counting time. The following standards were used...features were observed at the contact with the host pegmatite (Fig. 2a and b). The very ïŹne-grained margin shows |  | Mitchell, R. H., Yakovenchuk, V. N., Chakhmouradian, A. R., Burns, P. C., Pakhomovsky, Y. A. (2000) Henrymeyerite, a new hollandite-type Ba-Fe titanate from the Kovdor Complex, Russia. The Canadian Mineralogist, 38 (3) 617-626 doi:10.2113/gscanmin.38.3.617 | Journal (article/letter/editorial) | | forsterite, clinohumite, fluorapatite, magnetite, phlogopite and calcite. The carbonatite vein has a nearly...described in a âBaâTi hollanditeâ from the Tian Shan Mountains (Dmitriyeva et al. 1992) and the synthetic compound...minerals from some localities, e.g., Murun and Pegmatite Peak (Mitchell & Vladykin 1993, Chakhmouradian &...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineral. Petrol. 67, 85-110. CHEARY |  | | Book | | Firefly Books Ltd. Buffalo, New York Richmond Hill, Ontario Published in the United States by PO....139) Page 248: Quartz (amethyst variety), Erongo Mountains, Namibia * 5 x 6 x 3 cm Page 251: Calcite, Irai...Serbia Âą 11x8x7cm LEFT: Fluorite, Taihang Shan Mountains, Hebei, China * 19x13x1cm 10 | MINERALS: PRODUCTS...considered to be minerals. Microcline, Crystal Peak, Colorado, USA * 12 x 9x 5 cm. Biominerals Crystals formed...exemplified by tourmaline in schist, quartz or phlogopite. Space for Growth Cavities in rocks provide |  | Filina, Maria I., Aksenov, Sergey M., Sorokhtina, Natalia V., Chukanov, Nikita V., Kononkova, Natalia N., Belakovskiy, Dmitriy I., Britvin, Sergey N., Kogarko, Lia N., Chervonnyi, Alexandr D., Rastsvetaeva, Ramiza K. (2019) The new mineral fluorbarytolamprophyllite, (Ba,Sr,K)2[(Na,Fe2+)3TiF2][Ti2(Si2O7)2O2] and chemical evolution of lamprophyllite-group minerals in agpaitic syenites of the Kola Peninsula. Mineralogy and Petrology, 113 (4) 533-553 doi:10.1007/s00710-019-00664-0 | Journal (article/letter/editorial) | | University of Notre Dame, Notre Dame, IN 46556, USA 4 Institute of Problems of Chemical Physics, Russian...Saint-Hilaire in Canada (Wight and Chao 1995), Bearpaw Mountains and Gordon Butte in the United States (Chakhmouradian...complex, Paraguay (Haggerty and Mariano 1983), phlogopite-rich pegmatites of a lamproitelike intrusion...major or minor components of hydrothermal and pegmatite associations. The first petrological and mineralogical...al. 2012). Alkaline magmatic activity reached its peak in the Devonian. The largest alkaline complexes | | | Book | | Buffalo, New York 14205 66 Leek Crescent Richmond Hill, Ontario L4B 1H1 Design and Layout: Joseph Gisini/PageWave...139) Page 248: Quartz (amethyst variety), Erongo Mountains, Namibia * 5 x 6 x 3 cm Page 251: Calcite, Irai...Serbia Âą tixex7 cm LEFT: Fluorite, Taihang Shan Mountains, Hebei, China * (Sexes selem 10 | MINERALS:...considered to be minerals. Microcline, Crystal Peak, Colorado, USA * 12 x 9x 5 om MINERALS: PRODUCTS OF A...exemplified by tourmaline in schist, quartz or phlogopite. Space for Growth Cavities in rocks provide |  | | Journal (article/letter/editorial) | | zeolites; 8 banalsite, 9 barite, 10 clinopyroxene, 11 phlogopite. micaceous alkaline metasomatic assemblages...Britain), and Tony Nikischer (Excalibur Mineral Corp., USA) for providing the stronalsite and banalsite samples...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts., Montana. Mineral. Petrol. 67, 85-110. Chakhmouradian...Zr-rich pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic...Structures. Shape Software, Kingsport, Tennessee 37663, USA. http://shapesoftware.com/ Dunworth, E.A. & Bell |  | | Journal (article/letter/editorial) | | Microscope (Thermo Fisher Scientific, Waltham, MA, USA) coupled with an INCA Energy 250 EDS microanalysis...microprobe (JEOL USA, Peabody, MA, USA) with five wavelength dispersive spectrometers (JEOL USA, Peabody, MA...MA, USA), also located at the Scientific and Technological Centres of the University of Barcelona. Operating...counting time was 10 s peak and 10 s background except for Ce, La, Ba (20 s peak and 20 s background),... and Na and F (30 s peak and 30 s background). The acquisition method used was two background measurements |  | Ahijado, A., Casillas, R., Nagy, G., FernĂĄndez, C. (2005) Sr-rich minerals in a carbonatite skarn, Fuerteventura, Canary Islands (Spain) Mineralogy and Petrology, 84 (1) 107-127 doi:10.1007/s00710-005-0074-8 | Journal (article/letter/editorial) | | differential discriminator was used to avoid the PK III peak. The following standards were used: glasses from...shear zones where large (up to 2 cm) K-feldspar, phlogopite and pyrophanite crystals appear as relicts within...composed of calcite, aegirine augite, biotite=phlogopite, feldspar, apatite, magnetite, titanite and zircon...in the silicate minerals of carbonatites (i.e. phlogopite, K-feldspar and pyrophanite). The main phases...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineral Petrol 67: 85â110 Deer |  | | Journal (article/letter/editorial) | | hexagonal plates of microphenocrystal and groundmass phlogopite, which are typically zoned and mantled with ...west display bright green chlorite alteration. Phlogopite macrocrysts are sparse, inclusion rich, and may...is composed of a densely-packed aggregate of phlogopite macrocrysts and is poor in accessory minerals...Strontium-bearing apatite from common syenitic rocks in Montana and Russia (Chang et al., 1996) plots near the...nepheline-syenite pegmatites at pegmatite Peak, Bearpaw Mts, Montana. Mineral Petrol 67: 85±110 Chakmouradian |  | | Journal (article/letter/editorial) | | groundmass in association with olivine, zoned spinel, phlogopite, carbonates (dolomite, calcite, magnesite), apatite... minerals; Srpâserpentine; Dolâdolomite; Phlâphlogopite; Mgtâzoned spinel; Olâolivine; Tfpâtetraferriphlogopite...not typical of olivine of this generation. Rare phlogopite phenocrysts (2â5 vol.%) form round or irregular...newly formed phlogopite ± oikititic magnetite and rimmed by groundmass mica (phlogopite and/or tetraferriphlogopite)...due to macrocrystalâphenocrystal olivine and phlogopite (Fig. 1). Olivine (70â75 vol.%) occurs as rounded |
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