 | | Journal (article/letter/editorial) | | Pt–Pd SULFIDE IN THE J–M REEF OF THE STILLWATER COMPLEX, MONTANA Chusi LI and Edward M. RIPLEY Department... Indiana 47401, USA Abstract Pt–Fe alloy (Pt3Fe) in the J–M Reef of the Stillwater Complex, as exposed...exposed in the Stillwater mine, in Montana, occurs intergrown with secondary Fe–Ni–Cu sulfide; together,...assemblages containing chlorite, epidote, amphibole, talc and serpentine. The intergrowth is restricted to...only a minor amount of alteration (<5 vol.%) at the mine, whereas the discrete grains of the Pt–Fe alloy |  | | 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...of chlorite, clinozoisite, serpentine, calcite, talc, white mica, and magnetite, with traces of tremolite...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 |  | Christopher Jenkins, M., Mungall, James E., Zientek, Michael L., Holick, Paul, Butak, Kevin (2020) The Nature and Composition of the J-M Reef, Stillwater Complex, Montana, USA. Economic Geology, 115 (8). 1799-1826 doi:10.5382/econgeo.4777 | Journal (article/letter/editorial) | | Nature and Composition of the J-M Reef, Stillwater Complex, Montana, USA M. Christopher Jenkins,1,2,† James...Washington 99201, USA 3Stillwater Mine, Sibanye-Stillwater, 2562 Nye Rd., Nye, Montana 59061, USA Abstract...Abstract In this contribution, we analyze 30 years of mine development data and quantitatively identify the processes...mineralization in the J-M reef horizon of the Stillwater Complex along the strike and down the dip of...area of the Stillwater mine. We compare these results with data from the East Boulder mine and whole-rock |  | Wernette, B.W., Ripley, E.M., Li, C., Wintsch, R.P. (2018) Strongly negative δ34S values associated with secondary pyrite above and below the J-M Reef, Stillwater Complex, Montana. Chemical Geology, 493. 58-66 doi:10.1016/j.chemgeo.2018.05.023 | Journal (article/letter/editorial) | | pyrite above and below the J-M Reef, Stillwater Complex, Montana B.W. Wernette, E.M. Ripley, C. Li, R...pyrite above and below the J-M Reef, Stillwater Complex, Montana. The address for the corresponding author...Pyrite Above and Below the J-M Reef, Stillwater Complex, Montana IP T Wernette, B.W.1†, Ripley, E.M...Indiana University, Bloomington, Indiana 47405, USA US † – current address: Division of Earth and Ocean...North Carolina 27708, USA AC CE PT ED M AN Keywords: Sulfur isotopes, Stillwater Complex, J-M Reef |  | | 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...contain abundant secondary minerals (serpentine, talc, actinolite, chlorite and zoisite) associated with...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 |  | | 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) | | 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...coal, gold, lead, manganese, phosphate, silver, talc, vermiculite, and zinc is impressive. The official...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 |  | | 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 |  | 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 |  | | 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 |  | | 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) | | 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 |  | | 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) | | 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) | | closely resembling the stratiform deposit of Stillwater, USA (Jackson 1961), the Bushveld type of South...chromitites are of bedded nature and alternate with thick talc-serpentine intervals (Chakraborty 1973). The lenses...diameter. The ore contains very little interstitial talc and serpentine, and the chromite grains retain their...Ore As the quantity of gangue minerals increases (talc, serpentine, uvarovite, Kammererite or tremolite)...(e.g. Olivine or pyroxene), presently altered to talc or serpentine, are scattered as oval or rounded |  | | 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) | | 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) |  | | Report (issue) | | Stillwater Complex, Montana Structure, Mineralogy, and Petrology of the Basal Zone with emphasis on the...Cataloging in Publication Data Page, Norman J Stillwater Complex, Montana Structure, Mineralogy, and Petrology...Igneous. 2. Intrusions (Geology) Montana. 3. Sulphides. 4. Ore-deposits Montana. I. Title. II. Series: United....................... Geologic history of the Stillwater Complex and adjacent rocks Previous work and...FIGURH 1. 2. 3. 4. 5. 6. 7. Index map of the Stillwater Complex .................................... |  | | 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 |  | | Report (volume) | | Hawkes__--__--__---(B) The Coalwood coal field, Powder River County, Montana, by Robert P. Bryson__________-_______-__-...deposits in the Southern Pilot Mountains, Mineral County, Nevada, by David A. Phoenix and James B. Cathcart___________...sections of the Coalwood coal field, Powder River County, Mont---__-__--_---_-----_---_---__-------- In...the Pilot Mountains quicksilver district, Mineral County, Nev____-___________-___---______________ In pocket...underground workings of the Mina Development Co. mine, Pilot Mountains district-_-_______-_-___-________- |  | Barnes, Sarah-Jane, Pagé, P., Prichard, H. M., Zientek, M. L., Fisher, P. C. (2016) Chalcophile and platinum-group element distribution in the Ultramafic series of the Stillwater Complex, MT, USA—implications for processes enriching chromite layers in Os, Ir, Ru, and Rh. Mineralium Deposita, 51 (1) 25-47 doi:10.1007/s00126-015-0587-y | Journal (article/letter/editorial) | | distribution in the Ultramafic series of the Stillwater Complex, MT, USA—implications for processes enriching...of the rocks from the Ultramafic series of the Stillwater Complex are enriched in PGE relative to most...how the enrichment occurred in the case of the Stillwater Complex and applied our results to the chromite...Geological Survey, Spokane Office, Spokane, WA, USA whole rock and magnetite rims around the sulfides...Selenium . Chromite . Laurite . Ultramafic series . Stillwater Complex Introduction Most of the world’s primary |  | | Journal (article/letter/editorial) | | rocks. These structures have been described from Stillwater Complex (HEss 1939, 1960; JACKSON 1961, 1963...studied slump structures in some parts of the Stillwater complex and has concluded that disturbances took...the conclusion that slump in the rocks of the Stillwater complex occurred on very gentle slopes -- probably...JACKSON (1961, 1964) from the ultramafic rocks of Stillwater are of very common occurrence in the rocks of...local unconformities in the chromitites of the Stillwater complex have been attributed by JACKSON (1961 |  | | 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 ------------------------------------ |  | | Journal (article/letter/editorial) | | silicates into a chlorite – serpentine – carbonate – talc assemblage. Alteration did not substantially modify...chlorite-rich assemblages were replaced by magnesite, talc, dolomite, calcite and quartz, and the rare Cr-bearing...Sometimes, talc is replaced by magnesite that in turn can be resilicified to form late-generation talc, as a...correlation of major chromitite layers across four mine sections at the investigated localities (modified...With the exception of samples from the Pedrinhas mine which contain serpentine as the major interstitial |  | 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) | | contact UG2-1155.35 3 cm above the base of UG2 Mine name and sample number Not examined 4 sulfides...Used in This Study Magnetite Actinolite, talc Calcite, talc Calcite, chlorite Epidote Epidote Epidote...Epidote Actinolite Epidote Epidote Actinolite, talc Actinolite Actinolite, epidote Alteration minerals...hydrous minerals such as actinolite, epidote, and talc, a beam size of 5 µm was used to avoid dehydration...replacements in the samples involve talc, calcite, and magnetite. Talc usually occurs in the cleavages of |
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