 | | Journal (article/letter/editorial) | | AND MINERALIZATION IN THE J–M REEF, STILLWATER COMPLEX, MONTANA JOSEPH S. POLOVINA 1254 Wonder Court...the J–M Reef and its footwall in the Stillwater Complex, Montana. We used optical microscopy, scanning...talc, white mica, and magnetite, with traces of tremolite, Cl-rich ferropargasite and quartz. The intensity...petrography, geochemistry, layered intrusion, Stillwater Complex, Montana. SOMMAIRE Nous avons établi la minéralogie...J–M et les roches du socle du complexe de Stillwater, au Montana. A cette fin, nous avons utilisé la microscopie |  | | Journal (article/letter/editorial) | | COMPOSITION OF PLATINUM-GROUP MINERALS IN THE J-M REEF, STILLWATER COMPLEX BÉLINDA GODEL,† Centre for Exploration...platinum-group element (PGE)–bearing J-M reef, Stillwater Complex (Montana). The aims of the study were to determine...Bushveld Complex (South Africa) and the Stillwater Complex (Montana) contain stratiform layers, or “reefs...elements (PGE). In both the Bushveld and the Stillwater Complexes, the PGE are found spatially associated...2004). In contrast to the Bushveld Complex, the Stillwater Complex (Fig. 1) has been affected by several |  | | 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...view showing the Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded...mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many fine crystal |  | | Journal (article/letter/editorial) | | CHROM I TE AND OTHER MINERALS NEAR RED LODGE, MONTANA By HELEN STOBBE Smith College, Northampton, Mass...World War II on a small scale, near Red Lodge, Montana. The deposits near Red Lodge consist of lenses...Chromite Deposits near Red Lodge, Montana Red Lodge is in south-central Montana, 60 miles southwest of Billings...on the topographic quadrangle, Mount Maurice, Montana-Wyoming, published by the United States Geological...shown, near B.M. 9528, on the topographic sheet. The mine cut is just beyond the gravel pit. to the mill |  | | Journal (article/letter/editorial) | | Hydrothermal Alteration in the Main Sulfide Zone at Unki Mine, Shurugwi Subchamber of the Great Dyke, Zimbabwe:...Old Main, 1 University Dr., Pembroke, NC 28372, USA; chaumba@uncp.edu Received: 24 May 2017; Accepted:...silicate composition study across the MSZ at Unki Mine in the Shurugwi Subchamber was conducted to help...the mineralization. The PGE-enriched zone at Unki Mine is a ~10 m thick package of rocks ranging from gabbronorites...of sulfide mineralization likely occurred at Unki Mine with primary sulfides occurring in association with |  | | Journal (article/letter/editorial) | | minerals and the whole rocks of the J-M Reef (Stillwater Complex): Implication for the formation of the...Reef (footwall, reef and hanging wall) of the Stillwater Complex (U.S.A.). The aims of the study were...parental magma 1. Introduction The Stillwater Complex (Montana, U.S.A.) is a layered ultramafic to mafic...stratigraphy of the Stillwater Complex, Montana, USA. (a) Simplified geological map of the Stillwater Complex (modified...Zientek et al., 2002). (b) Stratigraphy of the Stillwater Complex (modified after Zientek et al., 2002) |  | | Journal (article/letter/editorial) | | Nelson Lead isotopes in sul®des from the Stillwater Complex, Montana: evidence for subsolidus remobilization...samples from the platiniferous J-M Reef of the Stillwater Complex were measured to elucidate the temporal...351310 University of Washington Seattle, WA 98195, USA e-mail: mccallum@u.washington.edu Editorial responsibility:...enrichment and redistribution in the J-M Reef of the Stillwater Complex. Previous measurements of the isotopic...chemical disturbance since their formation. The Stillwater Complex has been described in a recent review |  | | Report (volume) | | ............... Pick mine......................................... Shovel mine................................. In pocket Maps and section of the Pick mine......... In pocket Photograph of the Gallon Jug...chromite and chromite ore from Red Lodge district, Montana.......... Table showing gangue minerals of analyzed... CHROMITE DESPOSITS NEAR RED LODGE, CARBON COUNTY, MONTANA By H. L. James ABSTRACT The chromite deposits...contrast with the stratiform deposits of the Stillwater area, 30 milea to the northwest, the chromite |  | | Journal (article/letter/editorial) | | clinopyroxene is often altered to actinolite/tremolite and locally biotite. Interstitial chromite grains...minerals, which predominantly altered to actinolite/tremolite, serpentine and magnetite. Hydrothermal fluids...recrystallized during the formation of actinolite/tremolite, and then, cooperite and moncheite were altered...(PGE) district in Siberia, and the Stillwater Complex in the USA, is commonly thought to be magmatic...Bushveld Complex (Li et al. 2004) and JM reef in the Stillwater Complex (Boudreau and McCallum 1992; Meurer et |  | Schisa, Paul, Boudreau, Alan, Djon, Lionnel, Tchalikian, Arnaud, Corkery, John (2015) The Lac Des Iles Palladium Deposit, Ontario, Canada. Part II. Halogen variations in apatite. Mineralium Deposita, 50 (3) 339-355 doi:10.1007/s00126-014-0541-4 | Journal (article/letter/editorial) | | Heidelberg 2014 Abstract Analysis of apatite from the Mine Block Intrusion (MBI) of the Lac des Iles Igneous...Sciences, Duke University, Box 90227, Durham, NC 27708, USA e-mail: boudreau@duke.edu L. Djon : A. Tchalikian...Thunder Bay, ON P7B 2R2, Canada Introduction The Mine Block Intrusion (MBI) of the Lac des Iles Igneous...UG-2 chromitite and the Merensky Reef) and the Stillwater Complex (the J-M reef) contains anomalously high...and greenschist rocks (Somarin et al. 2009) of the Mine Block Intrusion, there has been no previous work |  | Li, C., Ripley, E. M., Merino, E., Maier, W. D. (2004) REPLACEMENT OF BASE METAL SULFIDES BY ACTINOLITE, EPIDOTE,CALCITE, AND MAGNETITE IN THE UG2 AND MERENSKY REEF OF THE BUSHVELDCOMPLEX, SOUTH AFRICA. Economic Geology, 99 (1) 173-184 doi:10.2113/gsecongeo.99.1.0173 | Journal (article/letter/editorial) | | of sulfides and orthopyroxene by actinolite or tremolite, (2) replacement of sulfides and plagioclase by...contact UG2-1155.35 3 cm above the base of UG2 Mine name and sample number Not examined 4 sulfides...thin sections) has been altered to actinolite, tremolite, epidote, and calcite. At Union the rocks have...actinolite, tremolite, and epidote. Regardless of sample location, actinolite and tremolite always replace...section. Replacement of sulfides by actinolite and tremolite The initial stage of this replacement is marked |  | | Journal (article/letter/editorial) | | PLATINUM GROUP ELEMENT DEPOSIT IN THE STILLWATER COMPLEX, MONTANA (USA) Corey J. Wall† and James S. Scoates... BC V6T-1Z4, Canada Abstract The Stillwater Complex, Montana (USA), is one of the world’s largest layered...high-precision crystallization ages for the reef and the Stillwater Complex. All samples are coarse grained to pegmatitic...Frog Pond adit (2709.11 ± 0.56 Ma), East Boulder mine (2709.28 ± 0.32 Ma), and West Fork area (2709.00...crystallization of the Lower Banded series of the Stillwater Complex. The recognition that zircon can be successfully |  | | Report (volume) | | Ultramafic Rocks from the Red Lodge District, Montana U.S. GEOLOGICAL SURVEY BULLETIN 1626-B Chapter...Ultramafic Rocks from the Red Lodge District, Montana By PATRICIA J. LOFERSKI Petrography, mineral chemistry...ultramafic rocks from the Red Lodge District, Montana. (Contributions to the geology of mineral deposits)...19.3.1626-B 1. Rocks, Ultrabasic. 2. Chromite Montana Red Lodge Region. I. Title. II. Series. III. Series:...Ultramafic Rocks from the Red Lodge District, Montana By Patricia J. Loferski Abstract The chromite |  | | Journal (article/letter/editorial) | | Article Carbon Mineralization with North American PGM Mine Tailings—Characterization and Reactivity Analysis...J. Carbon Mineralization with North American PGM Mine Tailings— Characterization and Reactivity Department...Worcester Polytechnical Institute, Worcester, MA 01609, USA CarbMinLab, Department of Earth, Ocean, and Atmospheric...University of Pennsylvania, Philadelphia, PA 19104, USA; jlwilcox@seas.upenn.edu Correspondence: cmwoodall@wpi...calcium- and magnesium-bearing mine tailings. The Stillwater mine in Nye, Montana produces copper, nickel, |  | | Journal (article/letter/editorial) | | Bushveld Complex (South Africa) or the Stillwater Complex (Montana, USA) contain layers enriched in platinum-group...Complex, South Africa) and the J-M Reef (Stillwater Complex, USA) and their Relationship to Microstructures...& Hieber (1986). Stillwater Complex The 2705 4 Ma (Premo et al., 1990) Stillwater Complex (Fig. 2a)...margin of the Beartooth uplift of southwestern Montana (Page & Zientek, 1985). The layered rocks are divided... As is the case in the Bushveld Complex, the Stillwater Complex contains several layers enriched in PGE |  | | Report (issue) | | are shown by dots and numbered serially in each county. The numbers are given in the list. Mines that... CALIF. AND OREG. OBEGON. Jackson County Continued. Coos County. 1. Black Sand (Suffern Co.)___ 2...2. White Rock (Krome Co.)_____ Dougl&s County. 1. Starveout (Grants Pass Chrome Co.)_______________ ...Co____ 3. Cow Creek ___________________ Curry County. 1. Bald Face_____________ S 2. C. & O. Lumber...Co____________ x S Meservey ________________ M Jackson County. 1. Applegate group. 2. Horseshoe group. 3. Stray |  | | Report (issue) | | Beaverhead and Madison Counties, southwestern Montana. These agencies use mineral resource data in creating...part of Beaverhead County, Montana, and the western part of Madison County, Montana. The study area (see...Pass south to the Montana-Idaho border; and (4) The southern boundary is the Montana-Idaho border (the...rocks in Montana, most notably from mines developed in the Stillwater Complex near Nye, Montana, in the...the Beartooth uplift area. The Stillwater Complex is a Late Archean (2,700 Ma) ultramafic to mafic layered |  | | Journal (article/letter/editorial) | | Indiana 47405, USA z Department of Geology, State University College, Fredonia, NY 14063, USA Abstract. Layered...geologic maps of the Deer Lake Complex, Itasca County, Minnesota. Centers of t sq. mile sections (10...clinopyroxene reaction rims commonly altered to tremolite. Serpentinized olivine composes from 60 to 80%...chlorite, whereas clinopyroxene is altered to tremolite. Talc has also been observed as a minor alteration...occurrence of oriented needles (lamellae) of tremolite-actinolite, possibly pseudomorphous after augite |  | | Journal (article/letter/editorial) | | olivine-bearing zones III and IV of the Stillwater Complex, Montana ± evidence for postcumulus ¯uid migration...III and IV of the Middle Banded series of the Stillwater complex. The discordant bodies are elongate perpendicular...1992). This report focuses on bodies from the Stillwater complex that are mineralogically simple (composed...examples of these ``discordant bodies'' from the Stillwater complex include discordant dunites (Raedeke and...L. Grove The stratigraphic divisions of the Stillwater complex used in this report are summarized in |  | | Report (volume) | | TO WILDERNESS PRIMITIVE AREAS BEARTOOTH AREA, MONTANA AND WYOMING GEOLOGICAL SURVEY BULLETIN 1391-F ...Still water, and Sweet Grass Counties, Montana, and Park County, Wyoming. By FRANK S. SIMONS and THEODORE...vicinity, Carbon, Park, Stillwater, and Sweet Grass Counties, Montana, and Park County, Wyoming. (Studies...Bibliography: p. 114 1. Mines and mineral resources Montana. 2. Mines and mineral resources Wyoming Park Co...vicinity, Carbon, Park, Stillwater, and Sweet Grass Counties, Mont., and Park County, Wyo., that may come |  | | Journal (article/letter/editorial) | | Distribution in the Stillwater Complex and Evolution of Vapor During Crystallization of Stillwater and Bushveld...occurrence and distribution of carbon in the Stillwater Complex have been investigated. In mineralized...system has been investigated for conditions of Stillwater and Bushveld crystallization. In alkali-poor...the first fluid to exsolve from Bushveld and Stillwater intercumulus melt was composed of a mixture of...Zone and predicts that chlor-apatite-bearing Stillwater rocks were similarly enriched in graphite during |  | | Journal (article/letter/editorial) | | Alaska and the Ural Mount&ins; (b) the Muskox and Stillwater stratiform complexes; (c) the Mt. Albert high-temperature...L-lizardite, C (xf)-cross fibre chrysotile, T-talc, Tr-tremolite, Ch--ohlorite, Dew--deweylite. 0 All values given...S.R. (see TAYLOB, 1967c) l-SD 2-SD 3 Stillwater Complex, Montana 10 12 45.SP Muskox Intrusion, N.W.T....Cedar Hill Quarry, Lrmcaster County, Pennsylv8nia Wood Mine, Laneaster 1 County, Pennsyivanie Ways Quarry...magmatic ultramajc intrusions. In the Stillwater Complex, Montana, the 8D values (-126 to -157) of three |  | | Journal (article/letter/editorial) | | ZONE -.-~ OLIVINE ........ tremolite > (?)serpophite - - - ~ tremolite s"~'~'~serpentine ~ t a l ~...~ ORTHOPYROXENE. ~ tremolite ) tal___~c~trem______olite--->tremolite "'-. ~chlorite s''~bastite ...talc + tremolite ) tremolite O R T H O P Y R O X E N E ~ "" ~'~chlorite + tremolite ~ tremolite + tremolite...tremolite > tremolite ~.~.~tremolite CLINOPYROXENE ~'~chlorite Ca-PLAGIOCLASE ~ saussurite Na-PLAGIOCLASE...the ultramafic zone where antigoritechlorite-tremolite-tale assemblages are produced as an end-stage |  | | Journal (article/letter/editorial) | | 1980 Contact-metamorphiceffects of the Stillwater Complex, Montana: the concordant iron fomation D. T. VelltMAN...b.y.), contact-concordant at the base of the Stillwater Igneous Complex, Montanao was contact-metamorphosedto...igneous body. Exchange along fractures in the Stillwater Iron Formation included limited introduction...introduction of Cu, S, and Al, probably from the Stillwater Complex. absent).Our major purposeis to evaluatethe...within the iron formation at five morphic The Stillwater Igneous Complex of southwestern along the baseof |  | | Report (issue) | | Stillwater Complex, Montana: Rock Succession, Metamorphism, and Structure of the Complex and Adjacent...GEOLOGICAL SURVEY PROFESSIONAL PAPER 999 Stillwater Complex, Montana: Rock Succession, Metamorphism and Structure...--------Petrology and rock succession of the Stillwater Complex and adjacent rocks------------------...metasedimentary rocks in the contact aureole of the Stillwater Complex -----------------------------------------Areal...---------------------------------------------------Stillwater Complex ------------------------------------ |
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