 | | 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...Sr-rich (strontiochevkinite) to REE-rich compositions [chevkinite-(Ce)]. Strontiochevkinite from Pegmatite...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) | | 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 di€erent provenance from Montana have been shown to contain a variety of rare minerals |  | Macdonald, Ray, Bagiński, Bogusław, 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...Christofschäferite-(Ce) Delhuyarite-(Ce) Perrierite-(Ce) Strontiochevkinite Rengeite Matsubaraite Hezuolinite Perrierite-(La)...inter alia, of perrierite-(Ce) from the Bearpaw Mountains, Montana, U.S.A. (0.35–1.18 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 |  | | 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 |  | | | | 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...East Antarctica nepheline syenite granitoid pegmatite syenite cutting gneisses strontio-chevkinite |  | | Journal (article/letter/editorial) | | University, 100 W 18th Avenue, Columbus, Ohio 43210-1185, USA Key words Perovskite á Loparite á Tausonite á Structure...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...tetragonal structures, did not converge because of severe peak overlapping. The pattern of x = 0.15 clearly exhibits |  | 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) | | (2008) Perrierite subgroup Perrierite-(Ce) Strontiochevkinite Rengeite Matsubaraite Hezuolinite Perrierite-(La)...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) | | Strontian calcian loparite-(Ce) from the Bearpaw Mountains, in Montana, is tetragonal [I4/mcm; a 5.5076(17)...strontium et calcium, et provenant des montagnes Bearpaw, au Montana, est tétragonal [I4/mcm; a 5.5076(17), c...complex, Russia (loparite L), and Pegmatite Peak, Bearpaw Mountains, Montana (loparite BM). A brief description...MARIANO, A.N. (1983): Strontian-loparite and strontiochevkinite: two new minerals in rheomorphic fenites |  | 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...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...1994), Pilanesberg (Zaitsev and Kogarko 2002), Bearpaw (Chakhmouradian and Mitchell 1999), Ol Doinyo Lengai |
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