 | | Journal (article/letter/editorial) | | 1942 No.6 NEPHELINE SYENITE PEGMATITES, ROCKY BOY STOCK, BEARPAW MOUNTAINS, MONTANA Wrlrteu T. Pncone...CoNrBNrs 398 398 401 Introduction Rocky Boy Stock Nepheline Syenites Field Description of Pegmatites Segregation...Segregation pegmatites Lens-shaped pegmatites. Pegmatite dikes 40r 402 403 408 408 409 409 409 Pegmatitic...Aplitic syenite. DescriptiveMineralogy Sanidine Nepheline. Sodalite. . . 4ll 413 4t3 Biotite. . . . 4r3... 398 fi/ILLIAM T. PECORA ABSTRACT Unusual nepheline syenite pegmatites, mineralogically resembling |  | | Journal (article/letter/editorial) | | Nb-mineralization in nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana A. R. Chakhmouradian...pegmatites at Pegmatite Peak (Bearpaw Mts., Montana) crystallized from an evolved fraction of nepheline-syenitic...(up to 1.1 wt.% Na20 and 1.0 wt.% BaO), altered nepheline (replaced by analcime, zeolites, muscovite and...sequestration of incompatible elements from the nepheline-syenite melt. Loparite-(Ce) evolved predominantly...[chevkinite-(Ce)]. Strontiochevkinite from Pegmatite Peak is compositionally similar to the type material |  | | 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) | | Survey, 956 National Center, Reston, Virginia 20192, USA ABSTR ACT The composition of chevkinite and perrierite...The Mineralogical Society from nepheline syenite pegmatites in Montana (Chakhmouradian and Mitchell, 1999)...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...Abstract At Gordon Butte (Crazy Mountains, Montana), agpaitic nepheline±syenite pegmatites intrude potassic...rocks (principally, malignites and nepheline microsyenites). All pegmatite veins are composed predominantly...predominantly of potassium feldspar, nepheline, prismatic aegirine, barytolamprophyllite, wadeite, eudialyte, loparite-(Ce)...The nepheline contains low levels of SiO2 and elevated Fe contents. The compositions of nepheline cluster |  | | 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 | | of nepheline-syenite pegmatites and associated alkaline rocks from Gordon Butte, Crazy Mountains (Montana)...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) | | are presented. Key-words: pyrochlore, lueshite, nepheline syenite, albitite, agpaitic rocks, Lovozero complex...of the most interesting of the family of sodic nepheline-syenite intrusions owing to its colossal size...major series include: (1) porphyritic alkali and nepheline syenites; (2) poikilitic feldspathoid syenites;...Mont SaintHilaire (Québec, Canada), and Bearpaw Mts. (Montana, USA). The present work also provides new...identified in several rock types, and primarily in nepheline-syenitic pegmatites. Very few wet-chemical analyses |  | | Journal (article/letter/editorial) | | reaction-induced rims on early strontian fluorapatite in nepheline syenite pegmatites. The apatite-group minerals...fluorapatite in a eudialyte-bearing nepheline syenite pegmatite. The overall compositional variation...intime avec une fluorapatite strontifère dans une pegmatite de composition de syénite néphélinique à eudialyte...ideally NaCeSr3(PO4)3F, is known from several pegmatite bodies in northwestern and southeastern Lovozero...rocks and phonolites (Table 2). Veins of nepheline syenite pegmatite containing strontium-apatite crosscut |  | Chakhmouradian, A. R., Hughes, J. M., Rakovan, J. (2005) FLUORCAPHITE, A SECOND OCCURRENCE AND DETAILED STRUCTURAL ANALYSIS: SIMULTANEOUS ACCOMMODATION OF Ca, Sr, Na, AND LREE IN THE APATITE ATOMIC ARRANGEMENT. The Canadian Mineralogist, 43 (2) 735-746 doi:10.2113/gscanmin.43.2.735 | Journal (article/letter/editorial) | | developed at the contact of quartzite and peralkaline nepheline syenites of the Lovozero complex, in northwestern...kimberlites (up to 43 wt.% SrO), and one in a granitic pegmatite (up to 20 wt.% SrO), but in all these cases, the...developed at the contact between peralkaline nepheline syenite and quartzite. The quartzite consists...minerals from Lovozero (Kola), Bearpaw Mountains and Gordon Butte (Montana) are plotted for comparison....similar to the phosphate mineral from the Bearpaw Mountains in Montana (Fig. 3), described as Sr–Na–LREE-enriched |  | | | | 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 Bjørkedalen, Oslofjord, Norway (Segalstad...perrierite-(Ca) perrierite-(Ca) 7 8 Pegmatitic Bearpaw Mts, Montana Burley Farm, Virginia Bjørkedalen, Norway...Norway Mt Charles, East Antarctica nepheline syenite granitoid pegmatite syenite cutting gneisses strontio-chevkinite |  | | Report (volume) | | -80+400 Mesh size Creede quadrangle, San Juan Mountains, Golo. D. Gottfried,G. Phair. Piedra rhyolite...volcanic series, San Critsobal quadrangle, San Juan Mountains, Colo. E. S. Larsen, Jr. Treasure Mountain rhyolite___...Alpine Gulch, San Cristobal quadrangle, San Juan Mountains, Colo. E. S. Larsen, Jr. Dacitic (?) , vitric...Santa Fe group, sec. 17, T.19N., R.9E., Santa Fe County, N. Mex. R. S. Cannon, Jr., R. L. Smith. ____.do__-______...LS-2-55. West shoulder of Mineral Mountain, La Sal Mountains, Utah. D. R. Shawe. _do _ __-_-20 Monzonite porphyry |  | | Journal (article/letter/editorial) | | hydrothermal natrolite-rich vein cutting kalsilite– nepheline syenite at Mount Rasvumchorr, Khibina peralkaline...orthosilicate in many alkaline rocks, and is common in nepheline syenites, some of which are large potentially...described by Černý et al. (1995) in a granite pegmatite contains considerably more total Ta plus Nb, but...natrolite vein cutting leucitenormative kalsilite–nepheline rischorrite at Mount Rasvumchorr, Khibina peralkaline... The genesis of this ultrapotassic kalsilite–nepheline syenite is not understood. It might originate |  | 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) | | in 1894 by W. Ramsay and V. Hackman from the nepheline-syenite of the Kola peninsula, Russia. Later,...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...Nb-mineralization in nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineral. Petrol...Tanzania. J. Petrol., 39, 20772094. Dawson, J.B. & Hill, P.G. (1998): Mineral chemistry of a peralkaline |  | Macdonald, R., Bagiński, B., Kartashov, P., Zozulya, D., Dzierżanowski, 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) | | al. (2011) Chukanov et al. (2011) granites, nepheline syenites and massif-type anorthosites in the Archaean...from the apical parts of granitic bodies) and a pegmatite (sample 5745b). Sample K3 is from borehole DH#...Cr-rich CGM polyakovite-(Ce) is in the Ilmen mountains, southern Urals. It was found in a dolomite veinlet...CGM (sample K4) from a syenite pegmatite in vein 35, Vishnevye mountains, Chelyabinsk Oblast’, which is...probe current was 20 nA. Counting times were 20 s on peak and 10 s on each of two background positions. The |  | | Journal (article/letter/editorial) | | 70(5), pp. 463–484 Apatite-group minerals from nepheline syenite, Pilansberg alkaline complex, South Africa...Bay, Ontario, Canada P7B 5E1 ABSTR ACT The nepheline syenites of the Pilansberg alkaline complex (South...Silica-undersaturated igneous rocks, especially nepheline syenite, carbonatite and alkaline ultramafites...incompatible and volatile elements in late-magmatic, pegmatite and postmagmatic mineral parageneses. These substitutions...evolution of apatite-group and related minerals from nepheline syenites of the Pilansberg peralkaline complex |  | 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...lamproites. These minerals are often found in nepheline syenites and related pegmatites, e.g. at Inagli...Saint-Hilaire in Canada (Wight and Chao 1995), Bearpaw Mountains and Gordon Butte in the United States (Chakhmouradian...Gerasimovskii et al. 1966; Zhirov 2015). LGM from nepheline syenites, lujavrites, malignites, peralkaline...major or minor components of hydrothermal and pegmatite associations. The first petrological and mineralogical |  | 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) | | foliated and recrystallized nepheline syenite, 5: fine-grained nepheline syenite, 6: albitized trachytic...rocks of the complex are associated with apatite-nepheline rocks, carbonatites, and hornfelsic and fenitic...in the outer part of the “Albitized Trachytic Nepheline Syenite (Foyaite) Unit” (Men’shikov, 1978; Barkov...contains: perthitic alkali feldspar, discrete albite, nepheline, analcime, andalusite, corundum, topaz, phlogopite...titanates from other localities Garnet Ridge, Arizona, USA (Wang et al., 1999). Landauite from the Burpala alkaline |  | 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) | | BANALSITE, STRONALSITE, AND THEIR SOLID SOLUTION IN NEPHELINE SYENITE AND ULTRAMAFIC ALKALINE ROCKS Ruslan P...Ba1–xSrxNa2Al4Si4O16, from five new occurrences in nepheline syenite and ultramafic alkaline rocks are characterized;...solid-solution series occur at the periphery of nepheline crystals in contact with late analcime or albite...form at a late-magmatic stage, together with nepheline, whereas stronalsite preferentially forms as a...postmagmatic conversion of nepheline to analcime, replacing both nepheline and banalsite. This process |  | | Journal (article/letter/editorial) | | al. 1986), and is similar to the framework in nepheline, which consists of regular and irregular sixmembered...between a semicircular ijolite–urtite body and nepheline syenite in the northeastern segment of the Khibina...interpreted as a late phase formed by alteration of nepheline or an unusual Sr-rich melilite (or both). In turn...in an altered cuspidine–melilite xenolith from nepheline syenite (Khibina, Kola alkaline province, northwestern...banalsite was cross-checked by the analysis of nepheline, feldspar, analcime and natrolite associated with |  | | Journal (article/letter/editorial) | | University, 100 W 18th Avenue, Columbus, Ohio 43210-1185, USA Key words Perovskite á Loparite á Tausonite á Structure...mineral in agpaitic alkaline lithologies, including nepheline syenites, foidolites, and aegirine-albite metasomatic...occurrences, e.g., Salitre (Brazil) and Bearpaw Mts. (Montana), Sr becomes a major substituting element...complexes, South America; 6 Pegmatite Peak, Bearpaw Mts., Montana; 7 Gordon Butte, Montana; 8 Little Murun complex...intensities do not exceed 2% of the strongest perovskite peak. The XRD patterns were analyzed by the Rietveld |  | Cooper, Alan F., Collins, Alice K., Palin, J. Michael, Spratt, John (2015) Mineralogical evolution and REE mobility during crystallisation of ancylite-bearing ferrocarbonatite, Haast River, New Zealand. Lithos, 216. 324-337 doi:10.1016/j.lithos.2015.01.005 | Journal (article/letter/editorial) | | have been recorded from carbonatite at Rocky Boy, Montana (Reguir and Mitchell, 2000), from ancylite-(La)...Ilimaussaq (Petersen et al., 2001), and from BearPaw Mountains (Chakhmouradian pers. comm. 2012). In the...of which, from pegmatite-hosted parageneses at Iveland, Norway and Jefferson County, USA, have chondritenormalised...although it is most common in granite, syenite, or nepheline syenite pegmatites, it has been widely reported...Nb-mineralization in nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineralogy and |  | | 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 ¢ 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...a fracture, producing such forms as aegirine pegmatite. As well, hot hydrothermal fluids often carry |  | | Journal (article/letter/editorial) | | miaskitic-to-agpaitic transition in peralkaline nepheline syenite (white foyaite) from the Pilanesberg Complex...miaskitic-to-agpaitic transition in peralkaline nepheline syenite (white foyaite) from the Pilanesberg Complex...miaskitic-to-agpaitic transition in peralkaline nepheline syenite (white foyaite) from the Pilanesberg Complex...ring-shaped intrusions of syenite and peralkaline nepheline syenite. A mildly peralkaline ((Na+K)/Al = 1.04-1...04-1.09), medium-to coarse grained nepheline syenite D makes up the outermost ring in the southwestern |  | | Journal (article/letter/editorial) | | alkali feldspar divide boundary being either nepheline or hypersthene ± quartz normative (Storey, 1981;...ciencies in the nepheline syenite pegmatites from Gordon Butte, Crazy Mountains (Montana, USA). They suggested...those of the Agua de Pau syenites occur in the nepheline syenites from North Qôroq (South Greenland; Coulson...oceanic islands have previously been reported from nepheline syenite ejecta on Tenerife (Wolff and Toney, 1993;...Nb-mineralization in nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineralogy and |
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