 | | Report (issue) | | Chromite Deposits in Central Part Stillwater Complex, Sweet Grass County, Montana GEOLOGICAL SURVEY BULLETIN... Chromite Deposits in Central Part Stillwater Complex, Sweet Grass County, Montana By A. L. ROWLAND A CONTRIBUTION...__--___-___________________________ Igneous rocks of the Stillwater complex._________________________ Basal zone...Mountain to West Fork of Stillwater River_________________ West Fork of Stillwater River_________________________...Geologic map and sections of the central part of the Stillwater complex. 9. Geologic map and sections of the |  | | Report (volume) | | Igneous and Tectonic Structures of the Stillwater Complex Montana By W. R. JONES, J. W. PEOPLES, and A...vertical faults.____-_-_-__-__--__Mill Creek-Stillwater fault zone_..__..____ Lost Creek fault_____-______-_-____--____...__ Development of deformation in vicinity of Stillwater complex.__.-_.._____-__-____--___^___-__--____Early... Late phase______-_____--________--_-----__. Stillwater River area_____________________ Boulder River..._-__-------__----------_-------Events in the Stillwater area________-______________---_--References cited |  | | Report (volume) | | J-M Reef in the Mountain View Area, Stillwater Complex, Montana U.S. GEOLOGICAL SURVEY BULLETIN 1674-C...J-M Reef in the Mountain View Area, Stillwater Complex, Montana By NORMAN J PAGE and BARRY C. MORING...J-M Reef in the Mountain View area, Stillwater Complex, Montana / by Norman J Page and Barry C. Moring...Moring, Barry C. II. Title. III. Title: Stillwater Complex, Montana. IV. Series. V. Series: Contributions...Acknowledgments C2 Generalized geologic history of the Stillwater Complex and adjacent rocks C2 Terminology and |  | | Journal (article/letter/editorial) | | Absorption Studies of Pyroxenes from the Stillwater Complex, Montana D.W. Schwartzman* and B.J. Giletti Dept...Providence, R.I. 02912, USA Abstract. Diffusion of argon from two bronzite pyroxenes from the Ultramafic...Ultramafic Zone of the Stillwater complex, Montana, has been measured by both a stepwise heating Ar release...1962; Gerling, 1962). Pyroxenes from the Stillwater complex, Montana, a mafic layered intrusive of Precambrian...heating of samples of augite and bronzite pyroxenes from the Stillwater complex. They concluded that all |  | LAMBERT, D. D., WALKER, R. J., MORGAN, J. W., SHIREY, S. B., CARLSON, R. W., ZIENTEK, M. L., LIPIN, B. R., KOSKI, M. S., COOPER, R. L. (1994) Re--Os and Sm--Nd Isotope Geochemistry of the Stillwater Complex, Montana: Implications for the Petrogenesis of the J-M Reef. Journal of Petrology, 35 (6) 1717-1753 doi:10.1093/petrology/35.6.1717 | Journal (article/letter/editorial) | | and Sm-Nd Isotope Geochemistry of the Stillwater Complex, Montana: Implications for the Petrogenesis of...Park, Maryland 20742, USA 3 US Geological Survey, Reston, Virginia 22092, USA Department of Terrestrial...Washington, DC 20015, USA 5 US Geological Survey, Spokane, Washington 99201, USA 6 Stillwater Mining Company... Nye, Montana 59061, USA 1 Department of Geology, Lamar University, Beaumont, Texas 77710, USA (Received...mafic and ultramafic cumulates from the 2700-Ma Stillwater Complex and associated fine-grained sills and |  | 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 |  | | 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..... Contact of the Basal norite with the Basal bronzite cumulate .. Age restrictions on the Basal zone |  | Ripley, Edward M., Wernette, Benjamin W., Ayre, Annie, Li, Chusi, Smith, Joshua M., Underwood, Benjamin S., Keays, Reid R. (2017) Multiple S isotope studies of the Stillwater Complex and country rocks: An assessment of the role of crustal S in the origin of PGE enrichment found in the J-M Reef and related rocks. Geochimica et Cosmochimica Acta, 214. 226-245 doi:10.1016/j.gca.2017.07.041 | Journal (article/letter/editorial) | | Manuscript Multiple S isotope studies of the Stillwater Complex and country rocks; An assessment of the...Keays, R.R., Multiple S isotope studies of the Stillwater Complex and country rocks; An assessment of the...pertain. Multiple S isotope studies of the Stillwater Complex and country rocks; An assessment of the... 1 Abstract- The J-M Reef in the Stillwater Complex of Montana is the highest grade Pd deposit in the...The ~ 2.7 Ga Stillwater Complex, located in the Beartooth Mountains in southwestern Montana, contains the |  | | Report (volume) | | DEPOSITS OF BOULDER RIVER AREA, SWEETGRASS COUNTY, MONTANA BY A. L. HOWLAND, E. M. GARRELS, AND W....Sedimentary rocks..................................... Stillwater complex.................................... Basal...•• map and sections of the western part of the Stillwater complex ••••••••• Geologic map and sections of...8. Index map of the chromite deposits of the Stillwater complex................... • • • • • • • • Columnar...DEPOSITS OF THE BOULDER RIVER AREA SWEETGRASS COUNTY, MONTANA By A. L. Howland, R. M. Garrels, and W. R |  | | Journal (article/letter/editorial) | | Zones in the Mountain View Area of the Stillwater Complex, Montana 1 Research School of Earth Sciences...1992) ABSTRACT The Ultramafic Series of the Stillwater Complex in the Mountain View area of the intrusion...cumulates at the base, olivine-bronzite cumulates at intermediate levels, and bronzite cumulates at the top. Most...and 11, variations of Mg/Fe in the olivine and bronzite, and of Ni in the olivine, are small and show...of Mg/Fe in the pyroxenes and olivines in the Stillwater cyclic units. We postulate that the G and H chromitite |  | | Report (issue) | | Associations ·in the Ultramafic Zone of the Stillwater Complex Montana GEOLOGICAL SURVEY PROFESSIONAL <~A...Associations in the Ultramafic Zone of the Stillwater Complex Montana By EVERETT D. JACKSON GEOLOGICAL SURVEY... and harzburgites in the lower part of the Stillwater complex UNITED STATES G.OVERNMENT PRINTING OF...associations in the Ultramafic zone of the Stillwater complex, Montana. Washington, U.S. Govt. Print. Off.,...the Stillwater com·plex. Bibliography : p. 100-101. 1. Petrology-Montana. 2. Mineralogy-Montana. 3. Rocks |  | | Journal (article/letter/editorial) | | Sulfur IsotopeStudiesof the Stillwater Complex and Associated Rocks, Montana MICHAEL L. ZIENTEK U.S....University,Bloomington,Indiana 47405 Abstract The Stillwater Complexin south-centralMontanais a late Archcanlayered...isotopiccompositionof sulfurin metamorphosedsedimentaryrocks,Stillwater-associated sillsanddikes,sulfideaccumulations...andmetashales (mean = 2.8%0);(2) iron-formation, Stillwater-associated sillsanddikes,andbasalsulfideaccumulations...constitutes the fide mineralsare presentin mostof the Stillwater PicketPin deposit(BoudreauandMcCallum,1986). |  | | Report (volume) | | Inclusions Within the B Chromitite, Stillwater Complex, Montana U.S. GEOLOGICAL SURVEY BULLETIN 1674-D...Inclusions Within the B Chromitite, Stillwater Complex, Montana By MICHAEL P. FOOSE and SUZANNE W. NICHOLSON...inclusions within the B chromitite of the Stillwater Complex, Montana, provide evidence for complex high-temperature...inclusions within the B chromitite, Stillwater Complex, Montana. (U.S. Geological Survey bulletin ; 1674-D)...Bibliography: p. 1. Sulfide minerals Montana. 2. Mineralogy Montana. SuzanneW. II. Title. III. Series. |  | | Report (volume) | | from the Lowermost Cyclic Units in the Stillwater Complex, Montana U.S. GEOLOGICAL SURVEY BULLETIN 1674-E...from the Lowermost Cyclic Units in the Stillwater Complex, Montana By PATRICIA J. LOFERSKI, BRUCE R. LIPIN...from the lowermost cyclic units in the Stillwater Complex, Montana / by Patricia J. Loferski, Bruce R. Lipin...I 19.3:1674-E 1. Chromite Montana. 2. Petrology Montana. 3. Geology Montana. I. Lipin, Bruce R. II. Cooper...Metasomatism E21 Comparison of Cyclic Units in the Stillwater E23 Calculation of Magma Thickness E24 Conclusions |  | | Report (volume) | | OF THE EASTERN PART OF THE STILLWATER COMPLEX STILLWATER COUNTY, MONTANA BY J. W. PEOPLES AND A. L........................ Claims on west slope of Stillwater Valley............. 394 394 396 398 398 398...Geologic map of the eastern part of the Stillwater complex, Montana....................... 374 64. Chromite...of the eastern part of the Stlllwater complex, Montana............. In pocket 65. Isometric block diagram..... 406 Figure 50. Index map of Montana showing location of Stillwater complex....................... |  | | Report (issue) | | study area, Custer and Gallatin National Forests, Montana Edited by JANE M. HAMMARSTROM1, MICHAEL L. ZIENTEK2...Study Area, Custer and Gallatin National Forests, Montana U.S. Geological Survey Open-File Report 93-207...700 km2) of National Forest land in southwestern Montana adjacent to the northern part of Yellowstone National...elements. Mines in production in 1992 are the Stillwater mine (platinum, palladium, gold, rhodium, copper...copper, and nickel), the Mineral Hill mine (gold and silver), and the Livingston Marble and Granite Works |  | | Journal (article/letter/editorial) | | Development of the Ultramafic Series in the Stillwater Complex, Montana by BRUCE R. LIPIN (Received 20 July...explores the hypothesis that chromite seams in the Stillwater Complex formed in response to periodic increases...0-2-O25 kbar, or 5-10% of the total pressure in the Stillwater chamber. An evaluation of the likelihood of fountaining...place. Mixing was an important process in the Stillwater magma chamber, however. After the new magma in...have been the mechanism that produced the thick bronzite cumulate layer (the Bronzitite zone) above the |  | | Report (issue) | | Geological Society of America Memoir 80 STILLWATER IGNEOUS COMPLEX, MONTANA A QUANTITATIVE MINERALOGICAL STUDY...Edward Sampson began the study of the Stillwater complex, Montana, in 1930. The writer commenced a detailed...Igneous and tectonic structures of the Stillwater Complex, Montana, by W. R. Jones, J. W. Peoples, and A...ses mee ee eis teen ee an Pend ena e eEOlivane-bronzite relations aes ce tets eater ty reiterate te P...MINERALOGICAL AND CHEMICAL COMPOSITION OF THE STILLWATER COMPLEX AND) TTS: SUBDIVISIONS cake cht rosy |  | | Journal (article/letter/editorial) | | ARTICLE Sulfide saturation history of the Stillwater Complex, Montana: chemostratigraphic variation in platinum...km-thick stratigraphic section of the Stillwater Complex, Montana was undertaken to refine and test a geochemical...Contact Mountain areas in the western part of the Stillwater Complex where the J-M reef occurs ∼1,460 m above...background PGE levels during crystallization of the Stillwater Complex. In contrast, the variations in the drill...possibilities of either magma mixing within the Stillwater chamber or the fluxing of a 152 Miner Deposita |  | | Journal (article/letter/editorial) | | Geochemistry of the J-M Reef of the Stillwater Complex, Minneapolis Adit Area II. Silicate Mineral Chemistry...platinum group element (PGE) rich J-M Reef of the Stillwater Complex is associated with the reappearance of...the result of fresh influxes of magma into the Stillwater chamber. Cumulus pyroxenes from the Norite Subzone...Series of the Stillwater. Liquid P crystallizes olivine at the pressure of the Stillwater chamber, but...olivine-orthopyroxene phase boundary is saturated with bronzite at higher pressures. The spectrum of cumulus mineralogy |  | | Journal (article/letter/editorial) | | 98195 USA 2 Department of Mineral Sciences,AmericanMuseum of Natural History,New York, NY 10024 USA Received...address: 2756 NE 103rd St., Seattle, WA 98125, USA O f f p r i n t requests to ." E.A. Mathez Hydration...to the PGE-rich Howland (or J-M) Reef of the Stillwater Complex, and its resolution awaits specific data...Several such horizons exist in the Bushveld and Stillwater Complexes. Entrapment of volatiles in intercumulus...of some of the anorthosite adcumulates in the Stillwater Complex; Lauder (1970) proposed that the Merensky |  | | Report (issue) | | Sulfur Isotopic Studies of the Stillwater Complex and Associated Rocks, Montana Michael L. Zientek1 and Edward...Bloomington, IN 47405 ABSTRACT The Stillwater Complex, in south-central Montana, is a Late Archean layered,...of sulfur in metamorphosed sedimentary rocks, Stillwater-associated sills and dikes, sulfide accumulations...metashale (mean 2.8 per mil); 2) iron-formation, Stillwater-associated sills and dikes, and basal sulfide...that occur above the basal accumulations in the Stillwater Complex (mean 1.2 per mil). The isotopic composition |  | | 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) | | 9 Springer-Verlag1989 Investigations of the Stillwater Complex: Part V. Apatites as indicators of evolving...Chemistry Building, Duke University, Durham, NC 27706, USA 2 Department of Geological Sciences, AJ-20, University...University of Washington, Seattle, WA 98195, USA Abstract. Variations in the F, C1 and OH contents of apatite...Microprobe analysis of intercumulus apatires from the Stillwater Complex reveal that Cl-rich apatites, typically...form the large layered intrusions such as the Stillwater and Bushvcld Complexes are generally considered |  | Todd, S. G., Keith, D. W., Le Roy, L. W., Schissel, D. J., Mann, E. L., Irvine, T. N. (1982) The J-M platinum-palladium reef of the Stillwater Complex, Montana; I, Stratigraphy and petrology. Economic Geology, 77 (6) 1454-1480 doi:10.2113/gsecongeo.77.6.1454 | Journal (article/letter/editorial) | | KEITH, L. W. LE RoY, Stillwater PGM Resources, 1826 Grand Avenue,Billings,Montana 59102 D. J. SCHISSEL...SCHISSEL, Department of Geology,Universityof Montana, Missoula,Montana 59812 E. L. MANN, Manville International...0861-0128/82/77/1454-2752.50 1454 J-M REEF, STILLWATER COMPLEX 1455 reachedcontinuous saturationwith... and in megacyclicunits I and II, is olivine, bronzite, plagioclase,augite. The later order, evident...unitsIII throughVI, is plagioclase, olivine,augite,bronzite(or hypersthene).The complicatedstratigraphyof |
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