 | | 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...mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many fine crystal |  | | Report (issue) | | Geochemical, and Isotopic Data for the Boulder Batholith, Southwest Montana Professional Paper 1793 U.S. Department...spheroidal weathered Butte Granite at Homestake Pass, Montana. Synthesis of Petrographic, Geochemical...Geochemical, and Isotopic Data for the Boulder Batholith, Southwest Montana By Edward A. du Bray, John N. Aleinikoff...geochemical, and isotopic data for the Boulder batholith, southwest Montana: U.S. Geological Survey Professional...8. 9. 10. Index map showing location of Boulder batholith relative to major geologic features in the |  | | Journal (article/letter/editorial) | | Amethyst Mine RUSS HAGE 701 Lolo Street Missoula, Montana 59802 dukbstr@aol.com MICHAEL A. MENZIES Unit...Alberta Canada T3B 4T7 mmenzies@shaw.ca Jefferson County, Montana P erched high on the south-facing side...steep ridge just east of the continental divide in Montana is the Little Gem amethyst mine. It is an imposing...the southern boundary of the Boulder Batholith in southwestern Montana. Map prepared by William Besse...southern extremity of the well-mineralized Boulder Batholith where those prospectors were seeking mineable |  | Lund, Karen, McAleer, Ryan J., Aleinikoff, John N., Cosca, Michael A., Kunk, Michael J. (2018) Two-event lode-ore deposition at Butte, USA: 40Ar/39Ar and U-Pb documentation of Ag-Au-polymetallic lodes overprinted by younger stockwork Cu-Mo ores and penecontemporaneous Cu lodes. Ore Geology Reviews, 102. 666-700 doi:10.1016/j.oregeorev.2018.05.018 | Journal (article/letter/editorial) | | Manuscript Two-event lode-ore deposition at Butte, USA: 40Ar/39Ar and U-Pb documentation of Ag-Au-polymetallic...J. Kunk, Two-event lode-ore deposition at Butte, USA: 40Ar/39Ar and U-Pb documentation of Ag-Au-polymetallic...pertain. Two-event lode-ore deposition at Butte, USA: 40Ar/39Ar and U-Pb documentation of Ag-Au-polymetallic...world-class deposits of the Butte mining district, Montana, USA, is deep pre-Main Stage porphyry Cu-Mo and overlying...350-400°C by 4 m.y. after emplacement. (2) Five quartz porphyry rhyolite dikes were emplaced at 67-65 |  | | Book | | Montana Hodges Robert Feldman Shaded relief indicates terrain and slope. Second Edition Rockhounding...longitude numbers and grid ticks are GPS compatible. Montana Enhanced detail shows more symbols, labels, and...history Cover photos of Montana agate (front) and ammonite imprint (back) © Montana Hodges Cover design by...imprint of The Globe Pequot Press MONTANA Search for stunning Montana agate along the Yellowstone River...paleontologists excavate dinosaurs in Malta. Rockhounding Montana points the way to the best rockhounding in the |  | | Journal (article/letter/editorial) | | Origins of Water in the Boulder Batholith and the Butte Ore Deposits,Montana* SIMONM. F. SI•EPP^m) Arm...feldspars,granophyric textures,and disequilibrium quartz-K-feldspar oxygenisotopefractionations. Theserocksmustall...Butte ore deposits,and the Late CretaceousBoulder batholith as well, appear to be Postbetholith rocks ,:::•QPrincipol...role of primary magmaticand meteoric hydrothermal Boulder betholith plutons ß Biotite fluids during the evolutionof...western FiG. 1. Generalizedgeologicalmap of the Boulder bathoMontana-Idaho-easternWashington region during |  | | 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) | | an individual magmatic complex such as the Boulder batholith, and by at least one isotope ratio that is...to include all rock chemical compositions from quartz diorite through potassic or sodic granite and their...area Santa Lucia Mountains Southern California batholith Salton Sea Locality Material and filament material*...Mountain Rhyolite (Re 1) Welded tuff, flow, Fisher Quartz Latite (Re 3) Hinsdale basalt, Jarosa Mesa (Re...Silver City Jcmcz Mountains Elkhorn Mountains Boulder batholiih Locality 30 29 28 27 26 25 24 |  | | Report (issue) | | the Basin and Boulder Mining Districts, Boulder River Watershed, Jefferson County, Montana Professional...the Basin and Boulder Mining Districts, Boulder River Watershed, Jefferson County, Montana Edited by David...historical mining in the Boulder River watershed, Jefferson County, Montana............................Geological Survey The Boulder River watershed study, Jefferson County, Montana ........................Fey, and Tracy C. Sole D9. Hydrogeology of the Boulder River watershed study area and examination of the |  | | Report (issue) | | HIGHLAND MOUNTAINS SILVER BOW AND MADISON COUNTIES, MONTANA By David R. Zimbelman, Byron R. Berger, and Wendy...Highland Mountains Silver Bow and Madison Counties, Montana————————————————————— 2. Generalized geologic...Highland Mountains Silver Bow and Madison Counties, Montana——————————— 4. 3 7 Rock sample sites, Highland...Highland Mountains Silver Bow and Madison Counties, Montana————————————————————— 8 5. Graphical depiction...Highland Mountains, Silver Bow and Madison Counties, Montana (fig.1), have been the site of frequent mining |  | | Journal (article/letter/editorial) | | McLarenDeposit, New World District,ParkCounty,Montana TODDW. JOHNSON ø ANDLAWRENCE D. MEINERT Department...rictnearCookeCity,ParkCounty,in south-central Montana. The depositishostedby gentlydippingmieriteanddolomitie...intrusiverocks,genetically relatedto late epidotealteration,quartz-pyrite alteration, andmagnetite-rich replacement...pyrite, magnetite,carbonate, and ehaleopyrite. Quartz-pyrite alteration postdates lateepidotealteration...andisassociated withehalcopyrite andphyllosilieates. Quartz-pyrite rockoccursasextensive replacements in the |  | | Book (volume) | | brownish yellow octagonal calcite (21.30 ct), Montana; light yellow orthoclase feldspar (25.03 ct), Idaho;...Colorado; colorless scheelite (19.66 ct), Kern County, California; octagonal step cut violetish pink...Vivid blue matched benitoite gems from San Benito County, California, consisting of 52 benitoites and 75...oligoclase feldspar (5.04 ct), Oregon; and three Montana sapphires, violetish blue (2.52 ct), yellow (4...large-scale mining of sapphire-bearing gravels in Montana is beginning and is expected to produce large quantities |  | | Report (volume) | | at St. Paul to only half that amount in central Montana, and the traveler, as he goes westward, will note...many groups of ranges, hi which some peaks in Montana and Idaho reach a height of 12,000 feet above sea...composed of beautifully white translucent grains of quartz, resembling rock candy except that the fragments...same year, but instead of occupying the dent Jefferson to explore the new terri- bluff recommended by...be seen from the Northern Pacific trains as they pass from St. Paul to Minneapolis. The gravel was deposited | | | Book (volume) | | Vivid blue matched benitoite gems from Sai, Benito County, California, consisting of 52 benitoites and 75...oligoclase feldspar (5.04 et), Oregon; and three Montana sapphires, violetish blue (2 .52 et), yellow (4...large-scale mining of sapphire-bearing gravels in Montana is beginning and is expected to produce large quantities...Cantlin, Ellis, ID; Jeannette B. Carillo, Gen1 Center USA, El Paso, TX; Gary Christopher, The Prospectors Cache...Comnussion, Little Rock, AR; Richard W Hughes, Boulder, CO; Duane L. Johnson, Rocky Mountain Soapstone |  | | Book | | AFRICA widely in Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns...Litchfield County. Ilmenite masses and crystals from somewhere near Washington, Litchfield County, were described |  | | Journal (issue) | | form the country rock to pegmatites and late-phase quartz veins intruded at various times before and after...include beryl, mica, tantalite and cassiterite; the quartz veins contain wolframite. Late-stage pneumatolytic...it reportedly originates in granite pegmatites, quartz-topaz veins and greisens. Two authors (Sharp, 1961...is associated with yellow topaz, smoky and milky quartz, specularite and rutile together with secondary...Austria, euclase, together with albite, rutile and quartz, occurs in vugs within mica schists from the Gross-Glockner |  | | Journal (issue) | | and being filled with one or two fluids or with quartz and apatite and/or epidote respectively; or those...W. F. 1963. Some observations on aquamarine and quartz. J. Gemm., IX, 1, 9-16. Eppler, W. F. 1964. Ungewöhnliche...a syringe needle) would strike the first mirror, pass through the concentric layers of nacre on a natural...Artificially induced color in amethyst-citrine quartz. Gems & Gemology, XVII, 1,37-9,3 figs in colour...colour, 1981. More on this new particoloured type of quartz and information on the irradiation used to alter |  | | Book | | Geochemistry PUBLIC LIBRAHY Fort Wayne and Allen County, Indiana K STO 3 'S33 00148 .8060 N Digitized...(high-density Si02), and albite to jadeite plus quartz. Assuming that the core and mantle have the composition...1,660 2,380 870 3,080 Mont, U.S.A. Zircon Quartz Creek, Colo., U.S.A. Xenotime Uncompahgre, Colo...isochron lines are a plot of equation (2-23) and pass through a point P, which represents the ratios of...K-AR MINERAL AGES FOR THE BUTTE QUARTZ MONZONITE, BOULDER BATHOLITH, MONTANA Radiogenic K2O Sample Mineral |
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Homestake Pass, Boulder Batholith, Jefferson County, Montana, USA