 | | Journal (article/letter/editorial) | | Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic...Springer-Verlag 2002 Abstract At Gordon Butte (Crazy Mountains, Montana), agpaitic nephelineĀ±syenite pegmatites...feldspar, nepheline, prismatic aegirine, barytolamprophyllite, wadeite, eudialyte, loparite-(Ce) and altered...overall evolutionary trend of clinopyroxene in the Gordon Butte rocks is from Fe-poor diopside to aegirineĀ±augite...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...assemblages from the Gordon Butte area, northern Crazy Mountains. At Gordon Butte, four major intrusive...The accessory mineral assemblage includes barytolamprophyllite, titaniferous magnetite, apatite and wadeite |  | | Journal (article/letter/editorial) | | unidentiļ¬ed 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 |  | 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...(Wight and Chao 1995), Bearpaw Mountains and Gordon Butte in the United States (Chakhmouradian and Mitchell...including lamprophyllite, fluorlamprophyllite, barytolamprophyllite, and the new mineral species fluorbarytolamprophyllite |  | | Journal (article/letter/editorial) | | NaāZr-silicates by eudialyte-III together with barytolamprophyllite as late hydrothermal phases. Further alteration...agpaitic nepheline syenite occurring at Gordon Butte, Montana, by Chakhmouradian and Mitchell (2002)....(10) kupletskite, (11) lamprophyllite, (12) barytolamprophyllite, (13) hejtmanite rim around lamprophyllite...solution series (Table 2, comp. 11ā13), barytolamprophyllite (Table 1, comp. 12), betafite, belovite(Ce)...eudialyte-III (Fig. 3eāg) together with barytolamprophyllite as late hydrothermal phases. All of the |  | | 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...one. The mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many |  | | Journal (article/letter/editorial) | | nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana A. R. Chakhmouradian and R. H. Mitchell Department...The pegmatites at Pegmatite Peak (Bearpaw Mts., Montana) crystallized from an evolved fraction of nepheline-syenitic...only few small crystals exhibit rims of barytolamprophyllite with up to 26.3 wt.% BaO. Titanite is devoid...Peak, Bearpaw Mrs., Montana Die Pegmatite yon Pegmatite Peak (Bearpaw Mts., Montana) sind aus dem Restdifferentiat...Bearpaw Mountains is the largest in the central Montana alkaline province. The complex is composed of Tertiary |  | | Journal (article/letter/editorial) | | loparite-(Ce), rinkite, eudialyte, lorenzenite and barytolamprophyllite (Appendix 1). The crystals of apatite are...localities (e.g., Bearpaw Mountains and Gordon Butte in Montana) exhibit a similar compositional trend... Inagli, IlĆmaussaq, Bearpaw Mountains. and Gordon Butte (RĆønsbo 1989, Pekov et al. 1995, Khomyakov 1995...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineral. Petrol. 67, 85-110. 3/28/02, 16:23 ...Zrrich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): Comparisons between potassic |  | 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 (1.2ā1.8 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, A...and Zr-rich pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic |
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Gordon Butte, Meagher County, Montana, USA