 | | 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...only few small crystals exhibit rims of barytolamprophyllite with up to 26.3 wt.% BaO. Titanite is devoid...[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 |  | | 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...feldspar, nepheline, prismatic aegirine, barytolamprophyllite, wadeite, eudialyte, loparite-(Ce) and altered...dur- ing the magmatic crystallization. Barytolamprophyllite in the pegmatites is primary (as opposed |  | | 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 |  | 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)...1998; Dawson & Hill, 1998), etc. A Ba-analogue of lamprophyllite, barytolamprophyllite, was described...al., 1983; Rastsvetaeva et al., 1990) and barytolamprophyllite (Peng et al., 1984; Rastsvetaeva & Dorfman...lamprophyllite-2M, lamprophyllite-2O and barytolamprophyllite-2M. The relationships between the structure...parameters of lamprophyllite polytypes, barytolamprophyllite, ericssonite and orthoericssonite is given |  | 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) | | minerals (lamprophyllite, fluorlamprophyllite, barytolamprophyllite, and the new mineral species fluorbarytolamprophyllite...fluorbarytolamprophyllite is the F-dominant analogue of barytolamprophyllite and the Ba-dominant analogue of fluorlamprophyllite...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 |  | | Journal (article/letter/editorial) | | unidentified euhedral phase; chlorite laths; barytolamprophyllite; perovskite; tausonite; diverse Sr-Ba-carbonates;...Sr-Ba-carbonates; and baryte. The presence of barytolamprophyllite and tausonite are typical of potassic undersaturated... kimberlite, lamproite, Dharwar Craton, barytolamprophyllite, tausonite. Introduction * E-mail: rmitchel@lakeheadu...and/or barytolamprophyllite(?) and residual strontianite (BSE image). (c, d) Barytolamprophyllite altered...euhedral phase (?monticellite), chlorite laths, barytolamprophyllite, perovskite, tausonite, diverse Sr-Ba-carbonates |  | | 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) | | fluorapatite in a eudialyte-bearing nepheline syenite pegmatite. The overall compositional variation of these...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...phonolites (Table 2). Veins of nepheline syenite pegmatite containing strontium-apatite crosscut urtites...loparite-(Ce), rinkite, eudialyte, lorenzenite and barytolamprophyllite (Appendix 1). The crystals of apatite are |  | 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) | | cancrinite, fluorapatite (1.2–1.8 wt.% SrO), barytolamprophyllite, manganoan ilmenite, titanian magnetite...(UK), and Tony Nikischer (Excalibur Mineral Corp., USA) for providing 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 |
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