 | | Journal (issue) | | WASHINGTON November 3, 2007 9:00 am to 5:00 pm Clark County P. U. D. Building 1200 Fort Vancouver Way Vancouver...of Eugene, Oregon near the town of Trent in Lane County, Oregon, just southeast of Springfield/Eugene (Staples...Trent, Lane County, Oregon Fig. 5 Yellow orpiment needles in chalcedony, Trent, Lane County, Oregon Fig...realgar needles, Royal Reward mine, Green River, King County, Washington Fig. 6 Yellow orpiment coating red...covered with colorless chalcedony. Trent, Lane County, Oregon. Fig. 7 Hollow needles, formerly realgar |  | | 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 |  | | 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...mm) phenocrysts of nepheline and titaniferous magnetite (< 22 mol.% Usp). Olivine is the earliest phase |  | | 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 nepheline±syenite pegmatites...overall evolutionary trend of clinopyroxene in the Gordon Butte rocks is from Fe-poor diopside to aegirine±augite...lamprophyllite. The evolutionary history of the Gordon Butte pegmatites can be subdivided into primary, agpaitic...loparite. The mineralogy of the pegmatites from Gordon Butte, other potassic complexes, and sodic agpaitic |  | | Journal (article/letter/editorial) | | 4. (a) Zoned spinel with Cr-rich core and Ti-magnetite mantle set in groundmass composed of fresh-to...spinels, and are spinel-chromite-ulvöspinel-magnetite solid solutions. Other spinels consist of euhedral...pinel-magnetite-cores overgrown by strongly continuously-zoned qandiliteulvöspinel-magnetite solid solutions...crystals also consist of qandiliteulvöspinel-magnetite solid solutions. Spinel-II included within phlogopite...lamprophyllite and barytolamprophyllite from the Gordon Butte potassic peralkaline pegmatite (Chakhmouradian |  | | Report (issue) | | _________________ ___. Nevada ___________ Elko County. - ______ ... _ Star mine, Harrison Pass _____... Tuscarora Range _____ _ ._. ________ Humboldt County Golconda manganese-tungsten depositNorth workings...naine________________ Mine near Green Talc mine. _____ Nye County ____ _._-___-________-___ Gabbs area __ _____________________..._____ Brucite and magnesite deposits. __ Pershing County __ Rocks in the West Humboldt Range ..~ Limerick...California Continued Nevada Continued White Pine County.._________________ Cherry Creek district______________ |  | Jeffery, A. J., Gertisser, R., Jackson, R. A., O'Driscoll, B., Kronz, A. (2016) On the compositional variability of dalyite, K2ZrSi6O15: a new occurrence from Terceira, Azores. Mineralogical Magazine, 80 (4) 547-565 doi:10.1180/minmag.2016.080.018 | Journal (article/letter/editorial) | | et al., 1996; Reguir, 2001), the Gordon Butte pegmatites, Montana, USA (Chakhmouradian and Mitchell, 2002)...Namibia (Schmitt et al., 2000); (11) Gordon Butte, Montana, USA (Chakhmouradian and Mitchell, 2002);...Ascension Ascension Straumsvola Strange Lake Gordon Butte Agua de Pau Agua de Pau Agua de Pau Agua...Canada (Birkett et al., 1992), analysis 5 from Gordon Butte, USA (Chakhmouradian and Mitchell, 2002), analyses...quartz, aenigmatite and fayalite with accessory Ti-magnetite, ilmenite, apatite, dalyite, an unspecified eudialyte-group |  | | Journal (article/letter/editorial) | | te; magnesiochromite; magnesian titaniferous magnetite; jeppite; armalcolite; shcherbakovite; ilmenite;...baotite (Figs 5a-b and 6b-d). Minor phases are magnetite, pyrite and hydro-zircon (Figs. 5c and 6c). Amphibole...Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic...Crowley, F.A. (1962) Baotite from Ravalli County, Montana. American Mineralogist, 47, 987–993. Karpenko...1961 Hydrothermal quartz vein Ravalli County, Montana, USA; Henrich et al., 1962; Koneva et al., 2008; |  | | Journal (article/letter/editorial) | | The transition from nyerereite (inclusions in magnetite) to shortite (in perovskite) signifies evolution...including phoscorites (forsterite + apatite + magnetite + calcite or dolomite) and various silicate–carbonate...solidified melt inclusions) in hydroxylapatite, magnetite, perovskite and ilmenite. Their maximum size does...identification of the other Na–Ca phase (inclusions in magnetite) was hindered by fluorescence effects masking...CAPR: diopside, magnesiohastingsite, calcite, magnetite, perovskite and titanite. Other phases (in total |  | Wu, Bin, Wang, Ru-Cheng, Yang, Jin-Hui, Wu, Fu-Yuan, Zhang, Wen-Lan, Gu, Xiang-Ping, Zhang, Ai-Cheng (2015) Wadeite (K 2 ZrSi 3 O 9 ), an alkali-zirconosilicate from the Saima agpaitic rocks in northeastern China: Its origin and response to multi-stage activities of alkaline fluids. Lithos, 224. 126-142 doi:10.1016/j.lithos.2015.02.008 | Journal (article/letter/editorial) | | and Zaitsev, 1999), and at Gordon Butte in the Crazy Mountains in the USA (Chakhmouradian and Mitchell...Hills in the USA (Carmichael, 1967), in the alkaline pegmatites of Gordon Butte in the USA (Chakhmouradian...mineral(s) in these rocks (Fig. 2e and f). Of note, magnetite and AC pyrite, and sulfide and sulfate co-occur...first described in alkaline pegmatites from Gordon Butte by Chakhmouradian and Mitchell (2002). Precipitation...(Markl et al., 2010). Biotite–aegirine, pyrite–magnetite, and sphalerite, SC R galena–barite of the Saima |  | 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...(Wight and Chao 1995), Bearpaw Mountains and Gordon Butte in the United States (Chakhmouradian and Mitchell...P2-West Kimberlite (Kaur and Mitchell 2013), Gordon Butte (Chakhmouradian and Mitchell 2002), Murun (Konev...form as a result of reaction between a Tirich magnetite and a peralkaline silica-undersaturated melt (March...nepheline-syenite pegmatites at pegmatite peak, Bearpaw Mts, Montana. Mineral Petrol 67:85–110 Chakhmouradian AR, Mitchell |  | | Journal (article/letter/editorial) | | phase II. The dyke assemblage was accompanied by magnetite and apatite veins and was followed by a late-stage...places. This event was accompanied by hydrothermal magnetite and apatite mineralizations. In the present contribution...dykes associated with magnetite veins Alkfsp, amph, F foid minerals, mag Magnetite veins Mag, F mnz,...poikilitic structure (Fig. 2a) with inclusions of magnetite and apatite. Occasionally, their rims are resorbed...altered sodalite group mineral, olivine, Ti-rich magnetite and ilmenite. The latter three phases are often |  | 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) | | Accessories present include zircon, titanian magnetite, pyrochlore, fluorite, meliphanite, Y-rich britholite...biotite, Ba-bearing K-feldspar, ilmenite and magnetite. Nepheline is impregnated with abundant microlites...barytolamprophyllite, manganoan ilmenite, titanian magnetite, natrolite, gonnardite(?), pectolite, calcite...are hosted by a late dyke of porphyroclastic magnetite-rich calciocarbonatite. Stronalsite is coeval...5 and unity, and oxygen fugacities above the magnetite–hematite buffer. These conditions are applicable |  | | Book | | ROADSIDE % JEOLOGY of Montana David Alt and Donald W. Hyndman ROADSIDE N JEOLoGY of Montana David Alt Donald...Roadside geology of Montana. Bibliography: p. Includes index. 1. Geology — Montana — Guide-books. I. Hyndman...know something about the rocks and landscapes of Montana. We hope our professional colleagues will enjoy...dealing with the four major geologic provinces in Montana. Each starts with its own more specific narrative...Nearly every geologist who has ever worked in Montana contributed something to this book. We read almost |  | | Journal (article/letter/editorial) | | Mn-rich rocks from the Hutter mine, Pittsylvania County, Virginia, U.S.A.: Implications for miscibility...solvus relations among jacobsite, galaxite, and magnetite— James S. Beard and Robert J. Tracy Isotopic and...hydrous fluid and silicate melt—Richard L. Hervig, Gordon M. Moore, Lynda B. Williams, Simon M. Peacock,...flow in the vicinity of Yucca Mountain, Nevada, USA— James B. Paces, Kenneth R. Ludwig, Zell E. Peterman...radionuclide sorption to vitric tuffs of Busted Butte, Nevada—H. J. Turin, A. R. Groffman, L. E. Wolfsberg |  | | Journal (article/letter/editorial) | | respectively. Fe-T| oxides Fe-Ti oxides (Ti-magnetite and ilmenite) are ubiquitous, both as discrete...nepheline syenite pegmatites from Gordon Butte, Crazy Mountains (Montana, USA). They suggested that leaching...nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineralogy and Petrology, 67, 85 – 110. Chakhmouradian...Zr-alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic...Wilkinson, J.F.G. (1970) Shonkin Sag laccolith, Montana. I. Ma c minerals and estimates of temperature |  | | Journal (article/letter/editorial) | | diopside, amphibole, calcite, titanite, perovskite, magnetite and chlorite. Apart from xenocrysts derived from...yellow perovskite (Fig. 1a) and titaniferous magnetite. In terms of chemical composition, the pale green...xenocrystic perovskite (dark brown, center), magnetite (opaque), calcite (colorless) and magnesiohastingsite...minor amounts, and invariably in association with magnetite. This phlogopite shows normal absorption (Z >... Phlogopite also occurs as a “corona” around magnetite crystals in the wallrock clinopyroxenites; however |  | | Journal (article/letter/editorial) | | symbols: Bd: baddeleyite, Zrl: zirconolite, Mgt: magnetite, Ilm: ilmenite, Bt: biotite, Ap: apatite. For...Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic...(1977): Barium phlogopite from Haystack Butte, Highwood Mountains, Montana. Carnegie Inst. Wash., Yearbook 76 |  | Walter, B.F., Parsapoor, A., Braunger, S., Marks, M.A.W., Wenzel, T., Martin, M., Markl, G. (2018) Pyrochlore as a monitor for magmatic and hydrothermal processes in carbonatites from the Kaiserstuhl volcanic complex (SW Germany) Chemical Geology, 498. 1-16 doi:10.1016/j.chemgeo.2018.08.008 | Journal (article/letter/editorial) | | in Australia; Humphries, 2010, Mountain Pass in USA; Castor, 2008; and Bayan Obo in Mongolia; Yang et...g. increased porosity, alteration of mica and magnetite to secondary FeOOH- ACCEPTED MANUSCRIPT 7 3...calcite and contain variable amounts of apatite, magnetite, phlogopite, pyrochlore-group minerals and rarely...with very different modal amounts of apatite, magnetite and pyrochlore-group minerals. D Pyrochlore-group...feldspar ± clinopyroxene ± garnet ± apatite ± magnetite ± titanite ± pyrochlore-group minerals SC that |  | Pagano, Diego Sebastián, Galliski, Miguel Ángel, Márquez-Zavalía, María Florencia, Novák, Milan, Škoda, Radek (2016) Petrography, Mineralogy, and Origin of the Syenite Pegmatitic Segregation Veins From La Peña Alkaline Complex, Mendoza, Argentina. The Canadian Mineralogist, 54 (4) 803-825 doi:10.3749/canmin.1600015 | Journal (article/letter/editorial) | | fluorapatite, titanite, interstitial sodalite, and magnetite and secondary abundant Na- and K-rich zeolites...are present in the IU. Opaque minerals (Ti-rich magnetite, pyrrhotite, pyrite, chalcopyrite, and scarce...apatite, titanite, interstitial sodalite, and magnetite are recognized as accessory minerals. Secondary...identified by manual separation; (3) abundant Ti-rich magnetite, scarce pyrite, chalcopyrite, and pyrrhotite....Formulae and Fe3þ/Fe2þ for clinopyroxene and magnetite were calculated with an Excel spreadsheet downloaded |  | | 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...includes Mg-Fe mica, rutile, zircon, titaniferous magnetite and thorite. Precipitation of these phases was...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) | | alkali feldspar + nepheline + augite + olivine + magnetite and indicates liquidus temperatures of ~850ºC...additional phenocrysts of olivine, augite and magnetite up to some mm in size. The major groundmass minerals...Wilk Zrn 896 Mineral jadeite kalsilite larnite magnetite monazite nepheline natrolite olivine K-feldspar...Aeg, Aen, Arf Ab, Or, Ne, Sod, Aeg, Aen, Arf Magnetite occurs as anhedral inclusions in augite (Fig....which are commonly associated with olivine and magnetite (Fig. 3a). It is strongly zoned with colourless |  | | Report (issue) | | volcanic vent, and the young lava near Haystack Butte had been mentioned by Hodge (1932; 1942, p. 29-30)...effusive materials at McDermid Cone and Haystack Butte (fig. 7) belong to the prominent area of "Simcoe...thickness as great as 20 feet in places north of Gordon ridge. In this work, the loess was not mapped because...northwest across the Columbia River to Haystack Butte and Jaekel Bench. The east end of Milter Island...as pigeonite by Campbell, 1950), 15 percent; magnetite, 5 percent; and brown glass and tiny microlites |  | Essene, Eric J., Claflin, Christopher L., Giorgetti, Giovanna, Mata, Pilar M., Peacor, Donald R., Á rkai, Pé ter, Rathmell, Mark A. (2005) Two-, three- and four-feldspar assemblages with hyalophane and celsian: implications for phase equilibria in BaAl2Si2O8-CaAl2Si2O8-NaAlSi3O8-KAlSi3O8. European Journal of Mineralogy, 17 (4) 515-535 doi:10.1127/0935-1221/2005/0017-0515 | Journal (article/letter/editorial) | | MI 48109-1063 USA College Preparatory School, 353 Crenshaw Road, Houston TX 77034 USA 3Dipartimento di...Semiconductor, 234 Oxford Street, South Portland ME 04101 USA 2YES Abstract: The occurrences of natural coexisting...hypersthene, Il = ilmenite, Kfs = K-feldspar, Mt = magnetite, Mu = muscovite, Olig = oligoclase, Pg = paragonite...and the smaller bright grains are ilmenite and magnetite. (d): antiperthite with oligoclase (light gray)...analcitites and phonolites from the Highwood Mountains, Montana (Larsen, 1941; Wilkinson, 1968; Nakamura & Yoder |  | | Report (issue) | | availability of ground water in the Fort Rock Basin, Lake County, Oregon, by E. R. Hampton. (C) Effect of tectonic...the operation would be under the supervision of a county watermaster or similar official. It is assumed...resources of the Upper Grande Ronde River basin, Union County, Oreg.: U.S. Geol. Survey open-file report. Hart...the operation would be under the supervision of a county watermaster or similar official. It is assumed...resources of the Upper Grande Ronde River basin, Union County, Oreg.: U.S. Geol. Survey open-file report. Hart |
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