 | | 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...samples are indistinguishable within uncertainty: Frog Pond adit (2709.11 ± 0.56 Ma), East Boulder mine (2709...± 0.45 Ma). A U-Pb baddeleyite date from the Frog Pond adit sample (2708.85 ± 0.46 Ma) is identical within |  | | 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 |  | | Journal (article/letter/editorial) | | Geochemistry of the J-M Reef of the Stillwater Complex, Minneapolis Adit Area II. Silicate Mineral Chemistry...Reef of the Stillwater Complex is associated with the reappearance of olivine and chromite as cumulus...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...enriched sulphides occur in both the Bushveld and Stillwater Complexes. The latter is host to the J-M Reef |  | | Report (issue) | | Custer and Gallatin National Forests, South-Central Montana compiled by Bradley S. Van Gosen1 Open-File Report...references ...................................... 5 I. Stillwater Complex .......................................district ................................... 40 VIII. Chromite deposits of the Red Lodge district .............Absaroka-Beartooth study area in south-central Montana ... 4 INTRODUCTION This bibliography lists more...Mountains and Absaroka Range in south-central Montana. It was compiled during an evaluation of the mineral |  | 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 |  | | Journal (article/letter/editorial) | | June 2016, Vol. 80(4), pp. 585–637 The Stillwater Complex, Montana – Overview and the significance of volatiles...Sciences, Duke University, Box 90227, Durham, NC 27708, USA [Received 31 May 2015; Accepted 19 November 2015;...ACT The geology of the 2.7 Ga Stillwater Complex in South-Central Montana is reviewed with a focus on the...precipitated solid assemblages to favour olivine ± chromite. A secondary origin for these two minerals is...hydrous melt inclusions (now crystallized) in chromite and olivine from both the Ultramafic and the Banded |  | Czamanske, Gerald K., Bennett, Pauline C., Zientek, Michael L., Weiblen, Paul W., Havach, George A., Foose, Michael P. (1986) Comprehensive bibliographies on mineralized and unmineralized layer mafic intrusions in the United States. Open-File Report Vol. 1986 (86-589) US Geological Survey doi:10.3133/ofr86589a | Report (issue) | | The Duluth Complex, Minnesota, and the Stillwater Complex, Montana, are given separate status in this contribution...bibliography on the Stillwater Complex is an update of the comprehensive bibliography in Montana Bureau of Mines...Special Publication 92, entitled "The Stillwater Complex, Montana: Geology and Guide." The bibliography...1986. All citations in the bibliography on the Stillwater Complex have been carefully checked for accuracy...1115. Austin, G. S., 1961, Photogeology of Cook County, Minnesota: University of Minnesota, M.S. thesis |  | 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...mineralization in the J-M reef horizon of the Stillwater Complex along the strike and down the dip of...of the deposit in the area of the Stillwater mine. We compare these results with data from the East Boulder...different spatial domains of the Stillwater mine area and between the Stillwater and East Boulder mines. Most |  | | Journal (article/letter/editorial) | | the 1Montana College of Mineral Science, Butte, Montana, and the 2 Rockwell International Science Center...Mineralization in a Pegrnatoid Pyroxenite of the Stillwater Complex, Montana, U.S.A. A. Volborth 1 and R. M. Housley2...element mineralization in the Stillwater Layered Anorthosite Complex, Montana. The graphite occurs in a pegmatoid...under the main palladium-platinum zone of the Stillwater intrusion may have bearing on the genesis and...in einem pegmatoiden Pyroxenit des Stillwater-Komplexes, Montana: Ein vorla~tfigerBericht Wir beschreiben |  | 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...Unconformlty :+•*-1Granitlc Intrusions iOetgJ•'--J Stillwater Complex • Metamorphic rocks • Fault • Thrust...productsof fractionalcrystallization(as ivine, chromite,bronzite (or, rarely, hypersthene), 2 cumulatesshouldbe) |  | | 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...exploration led to the discovery and development of the Stillwater mine and the discovery of gold-copper-silver |  | | 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 |  | | 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) | | J-M Reef and Associated Rocks of the Stillwater Complex, Montana ALAN BOUDREAU∗ DEPARTMENT OF GEOLOGY...GEOLOGY, DUKE UNIVERSITY, BOX 90227, DURHAM, NC 27708, USA RECEIVED MAY 5, 1998; REVISED TYPESCRIPT ACCEPTED...portion of OB I led to the formation of olivine and chromite by incongruent melting of gabbronorite in the...principal platinumgroup element deposit of the Stillwater complex, the J-M reef. OB I is characterized...mineral-bearing assemblages) are present in olivine and chromite. (7) Halogen-bearing minerals in the olivine-bearing |  | 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) | | 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). |  | | 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 |  | | Journal (article/letter/editorial) | | Halogen Geochemistry of the Stillwater and Bushveld Complexes: Evidence for Transport of the Platinum-Group...exception of those from the PGE ore zones of the Stillwater and Bushveld Complexes, have C1/(C1 + OH + F)...phases and low temperaturefluids.However, both the Stillwater and Bushveld phlogopites are enriched in Cl compared...deposit of Oli vine-Bearing Subzone I of the Stillwater Complex are used to compute a fluid composition...platinum-group elements (PGE) in the Bushveld and Stillwater Complexes has focused on whether concentration |  | | Book | | Subsequent work by H.H. Hess and E.D. Jackson (Stillwater) and B.V. Lombaard (Bushveld) revealed problems...dunite with 1 to 2% chromite, followed upward by a harzburgite w i t h - 1 % chromite, and an upper-most...upper-most orthopyroxenite with only a trace of chromite. Within each cyclic unit whole-rock and mineral compositions...cycles. Similar cyclic units are present in the Stillwater, Great Dyke, Bushveld, Rum, Jimberlana, and other...in magmas, the formation of a layer with >90% chromite must involve a column of magma hundreds of times |  | | Journal (article/letter/editorial) | | northwesttrendingbandon the northeastsideof Bear Creek Valley in the Medford Quadranglewhere it generallystrikes...greenstoneand schist,and one (Mammoth Lode) with the May Creek schist. Associated IntrusiveRocks. Intrusiverocksoutcropnear...(Cp) replaces pyrrhotite along a fracture (Fall Creek Coppermine.) Magnification48 X. Fxg. 5. Bornite...orebodies in serpentine (Waldo Coppermineand Fall Creek prospect)are generallysmallto moderatediscontinuous...thoseexhibitedby chalcopyriteand cubanire. (Fall Creek Copper mine.) Magnification 48 X. FiG. 8. Tetrahedrite |  | | Journal (article/letter/editorial) | | SEPTEMBER-OCTOBER, 1988 NO. 6 MagmaEvolutionin the Stillwater Complex,Montana:II. Rare Earth Element Evidence...Ultramaficseries-LowerBandedseriescontactof the Stillwater Complexare consistentwith magmamixingasa fun...MgO gabbronoritedikesalsoin the footwallof the Stillwater Complex suggestthat these liquid compositionsmay...enrichment of the platinum-group elements in the Stillwater magma chamberduring the formationof the Ultramafic...ectivemixing(Irvine et al., 1983) of the two Stillwater parental magmasis therefore preferred over mixingvia |  | | Journal (issue) | | ender, master's cand., PSU 4. Wickiup Mountain-Big Creek area stratigraphy, sedimentology, and petrology:...Dallas-Monmouth area: J.B. Gonthier, USGS, Portland Johnson Creek geo-hydrology and environmental geology: B. Henderson...District: S.G. (Power) Starch, master's cand., OSU Blue Creek District - massive sulfides: C. Taylor, master's...cand., U of 0 Land use geology of western Curry County: J.D. Beaulieu, DOGAMI, Portland 38 4. 5. 6....27. 28. 29. Land use geology of central Jackson County: J.D. Beaulieu, DOGAMI, Portland Talent quadrangle |  | | Report (issue) | | England Moscow, Russia London, Ontario Butte, Montana Modena, Italy Cape Town, Republic of South Africa...emplacement and solidification of the Stillwater Complex (Montana) are described and discussed by Zientek...Reef in the currently producing mines of the Stillwater Mining Company. The PGE mineralization in the...Platinum-Group Element Mineralization in the Stillwater Complex, Montana M.L. Zientek, R.W. Cooper, S.R. Corson...Barnes and Maier; Cawthorne et al., this volume), Stillwater Complex in United States (Zientek et al., this |  | | Journal (article/letter/editorial) | | Laflamme (1974) found up to 1.5 wt.% Pd in the Stillwater pentlandite material, whereas Todd et al. (1982)...analysis of pentlandite from the J-M Reef of the Stillwater Complex with up to 3.3 wt.% Pd, and an average...and 14,200 (13,648) ppm Pd in pentlandite from Stillwater (the values in parentheses are the alternative...with values of 0.08–0.51 wt.% Pd from another Stillwater sample set, and could not detect Pd in the Sudbury...ppm, for pentlandite from the J-M Reef in the Stillwater complex; the associated pyrrhotite has 8–56 ppm |  | | Report (issue) | | GEOLOGY AND MINERAL RESOURCES OF JOSEPH_INE COUNTY, OREGON 1979 STATE OF OREGON DEPARTMENT OF GEOLOGY...100 GEOLOGY AND. MINERAL RESOURCES OF JOSEPHINE COUNTY, OREGON By LEN RAMP, Resident Geologist and NORMAN...030 Funded in part with a grant from Josephine County Board of Commissioners STATE GEOLOGIST GOVERNING...on California-Oregon line in headwaters of Blue Creek is pinkish-orange and should be tan. 2. Small lenticular...bluish gray of R. as. 4. Small patch north of Deer Creek mostly in SW* sec. 11, T. 38 S., R. 7 W., T. 39 |
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