 | | Journal (article/letter/editorial) | | Geochemistry of the J-M Reef of the Stillwater Complex, Minneapolis Adit Area II. Silicate Mineral Chemistry...Chemistry and Petrogenesis by STEPHEN J. BARNES* AND ANTHONY J. NALDRETT (Received 22 June 1984; revised...The platinum group element (PGE) rich J-M Reef of the Stillwater Complex is associated with the reappearance...hosts the Reef is interpreted as the result of fresh influxes of magma into the Stillwater chamber. Cumulus...Series of the Stillwater. Liquid P crystallizes olivine at the pressure of the Stillwater chamber, but |  | Bow, C., Wolfgram, D., Turner, A., Barnes, S., Evans, J., Zdepski, M., Boudreau, A. (1982) Investigations of the Howland Reef of the Stillwater Complex, Minneapolis Adit area; stratigraphy, structure, and mineralization. Economic Geology, 77 (6) 1481-1492 doi:10.2113/gsecongeo.77.6.1481 | Journal (article/letter/editorial) | | Investigations of the Howland ReefI of the StillwaterComplex,Minneapolis Adit Area: Stratigraphy,Structure...Mineralization C. Bow, D. WOLFGRAM,A. TURNER,S. BARNES,J. EVANS,M. ZDEPSKI,AND A. BOUDREAU AnacondaCopperCompany...depositoccurswithin the lower part of the banded zoneof the Stillwater Complex, a layered, tholeiitic intrusionof Archcanage...Archcanage. The zone of platinum concentration, the Howland reef, is coincidentwith the reappearanceof olivine...distinguishedby variable proportions of olivine,bronzite,plagioclase, and augitc.Phlogopite,hornblende |  | | Report (volume) | | Gabbronoritic Rocks below the J-M Reef in the Mountain View Area, Stillwater Complex, Montana U.S. GEOLOGICAL SURVEY...Rocks below the J-M Reef in the Mountain View Area, Stillwater Complex, Montana By NORMAN J PAGE and BARRY...Data Page, Norman, J Petrology of the noritic and gabbronoritic rocks below the J-M Reef in the Mountain...Mountain View area, Stillwater Complex, Montana / by Norman J Page and Barry C. Moring. p. cm. (U.S. Geological...Moring, Barry C. II. Title. III. Title: Stillwater Complex, Montana. IV. Series. V. Series: Contributions |  | | Journal (article/letter/editorial) | | Petrology © by Springer-Verlag 1990 The Paasivaara PGE Reef in the Penikat Layered Intrusion, Northern Finland...Finland T. A. Huhtelin 1, T. T. Alapieti 1, and J. J. Lahtinen 2 Department of Geology, University of Oulu...initial discovery. The uppermost of these, the PV Reef, has the highest Pt/Pd ratio. It is located in the...interstices of this plagioclase orthocumulate. The Reef has also been encountered in other parts of the...braggite ((Pt, Pd, Ni)S). It is suggested that the PV Reef was formed in the mixing process when the fifth |  | 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) | | secondary pyrite above and below the J-M Reef, Stillwater Complex, Montana B.W. Wernette, E.M. Ripley, C....secondary pyrite above and below the J-M Reef, Stillwater Complex, Montana. The address for the corresponding...Secondary Pyrite Above and Below the J-M Reef, Stillwater Complex, Montana IP T Wernette, B.W.1†, Ripley...Indiana University, Bloomington, Indiana 47405, USA US † – current address: Division of Earth and Ocean...Carolina 27708, USA AC CE PT ED M AN Keywords: Sulfur isotopes, Stillwater Complex, J-M Reef, secondary |  | | Journal (article/letter/editorial) | | telluride mineral from the Stillwater Layered Igneous Intrusion, Montana, U.S.A.†k Chris J. Stanley1,* and Anna...specimens from the Stillwater Layered Igneous Intrusion, Stillwater Valley, Montana, U.S.A. (45°23′11′′N...telluride, new mineral, layered intrusion, Howland Reef, Stillwater Complex Introduction Kojonenite, is a...of the Minneapolis Adit, Howland Reef of the Stillwater Layered Igneous Intrusion, Stillwater Valley...Valley, Montana, U.S.A. (45°23′11′′N and 109°53′03′′W). The Howland Reef is a platinum-group mineral deposit |  | | Journal (article/letter/editorial) | | 9 Springer-Verlag1989 Investigations of the Stillwater Complex: Part V. Apatites as indicators of evolving...fluid composition A.E. Boudreau 1 and I.S. M c C a l l u m z Department of Geology, Old Chemistry Building...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 |  | 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) | | Geochemistry of the Stillwater Complex, Montana: Implications for the Petrogenesis of the J-M Reef 1 2 4 Victorian...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 |  | 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...origin of PGE enrichment found in the J-M Reef and related rocks Edward M. Ripley, Benjamin W. Wernette, Annie...Annie Ayre, Chusi Li, Joshua M. Smith, Benjamin S. Underwood, Reid R. Keays PII: DOI: Reference: S0016-7037(17)30465-9...Keays, R.R., Multiple S isotope studies of the Stillwater Complex and country rocks; An assessment of the...S in the origin of PGE enrichment found in the J-M Reef and related rocks, Geochimica et Cosmochimica |  | 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...the sulfide mineralization in the J-M reef horizon of the Stillwater Complex along the strike and down...down the dip of the deposit in the area of the Stillwater mine. We compare these results with data from...the composition of the reef sulfides in different spatial domains of the Stillwater mine area and between |  | | 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 |  | | 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...involved in the crystallization of the Stillwater Complex. A dry Stillwater magma would have been mineralogically...deposits. K E Y WO R D S : Stillwater Complex, layered intrusions, J-M Reef, platinum-group element deposits |  | | Journal (article/letter/editorial) | | Merensky Reef in the Rustenburg section of the Bushveld Complex D . M . Nicholson i * and E.A. M a t h e...98195 USA 2 Department of Mineral Sciences,AmericanMuseum of Natural History,New York, NY 10024 USA Received...Abstract. A petrogenetic model for the Merensky Reef in the Rustenburg section of the Bushveld Complex...electron microprobe data. The model maintains that the reef formed by reaction of hydrous melt and a partially...feldspathic pyroxenite, there is a continuous range of reef lithology from pyroxenite to pegmatoidal harzburgite |  | | 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...the western part of the Stillwater Complex where the J-M reef occurs ∼1,460 m above the floor of the intrusion...of the J-M reef were analyzed to detail compositional variations directly above and below the J-M reef...reef. Below the J-M reef, background concentrations of Pt (10 ppb) and Pd (7 ppb) are features of peridotites |  | | 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 (issue) | | Studies of the Stillwater Complex and Associated Rocks, Montana Michael L. Zientek1 and Edward M. Ripley2 ...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...(PGE)-enriched sulfide mineralization that constitutes the J-M Reef and the Picket Pin deposit. The 834s values for...metashale (mean 2.8 per mil); 2) iron-formation, Stillwater-associated sills and dikes, and basal sulfide |  | | Journal (article/letter/editorial) | | mineral compositions in layered intrusions Stephen J. Barnes CSIRO Division of Minerals and Geochemistry...based on analyses of coexisting phases in the Stillwater Complex (Raedeke and McCallum 1984; Barnes and...diffusion, and the final result is the same. 90 Opx c u m u l a t e (Bronzitite) S 80 50 30 10 Q ,o 6O...~2o~1. . . . ,a,. (Gabb..... i r e ) ~ i i i ~ ~ j ~ ' / ~ ~ ~ / / 80 Results Families of curves...since all the phases involved have similar F e O / M g O ratios. A good approximation to the trapped liquid |  | | Journal (article/letter/editorial) | | Springer-Verlag 1991 A lead isotopic study of the Stillwater Complex, Montana: constraints on crustal contamination...samples covering the stratigraphic thickness of the Stillwater Complex indicate a narrow range of apparent initial...Mountains. Contamination of magmas parental to the Stillwater Complex by the Late Archean crustal suite is...for two reasons: (1) Th and U concentrations in Stillwater rocks and plagioclase are very low (about 0.08...compositions of the diverse magmas entering the Stillwater chamber to near-identical values. The preferred |  | | Journal (article/letter/editorial) | | mechanisms and post-formational redistribution BRONWEN M. COGHILL AND ALLAN H. WILSON Department of Geology...(~ Copyright the Mineralogical Society 614 B. M. C O G H I L L A N D A. H. WILSON or whether transport...the margin and increasing to a thickness of 9-10 m in the axis (Fig. 2b). The generally medium-grained...cumulus bronzite enclosed by postcumulus augite and plagioclase. The websterite is a bronzite-augite cumulate...accessory titanite, apatite and zircon. The 'potato reef' is the name given to websterite and bronzitite |  | | Journal (article/letter/editorial) | | H a l k o a h o 1, T. T. Alapieti 1, J. J. Lahtinen 2, and J. M. Lerssi 3 1Department of Geology, University...Reefs (AP I and AP II) are located about 250 m and 340 m above the base of megacyclic unit IV in the Penikat...(pothole) about 300 m long and 100 m deep is encountered in the area of the AP I Reef, and it is in this...that the AP I Reef, which is normally 30 cm thick, attains its maximum thickness of 20 m. The dominant...bezeichneten vererzten Zonen liegen ungef'~ihr 250 m und 340 m oberhalb der Basis der vierten megazyklischen |  | | Journal (article/letter/editorial) | | Petrology © by Springer-Verlag 1990 The Sompuj irvi PGE Reef in the Penikat Layered Intrusion, Northern Finland...and J. J. Lahtinen 2 1Department of Geology, University of Oulu, Oulu, Finland, 2 0 u t o k u m p u Oy...December 14, 1989 Summary The Sompujfirvi (SJ) PGE Reef is located at the border between the third and fourth...d type within the SJ Reef was formed. Zusammenfassung Das Sompujiirvi PGE Reef in der Penikat-Intrusion...Sompuj/irvi (SJ) PGE Reef liegt im Grenzbereich von Megazyklus III und IV, 400 1000 m oberhalb der Basis |  | | Journal (article/letter/editorial) | | in the Rincón del Tigre Complex, Eastern Bolivia M. D. PRENDERGAST† 1 Carson Close, Greendale, Harare...sulfide and precious metals mineralization, 80 to 185 m thick. The Precious Metals zone comprises an upper...base (the sulfide phase boundary) about 23 to 70 m above the magnetite phase boundary, and a lower precious...three different superimposed scales from about 3 m to several tens of meters. A possible interpretive...the upper part of the layered sequence 113 114 M. D. PRENDERGAST and is broadly similar in form and |  | Marcantonio, Franco, Zindler, Alan, Reisberg, Laurie, Mathez, E.A. (1993) Re-Os isotopic systematics in chromitites from the Stillwater Complex, Montana, USA. Geochimica et Cosmochimica Acta, 57 (16) 4029-4037 doi:10.1016/0016-7037(93)90351-v | Journal (article/letter/editorial) | | syste~~ti~s in ~hro~tites from the Stillwater Complex, Monks + .OO USA FRANCO MARCANTONIO,’ ALAN ZINDLER...Observatory ofColumb~a University, Palisades, NY 10964, USA 2Department of Mineral Sciences, American Museum...Museum of Natural History, New York, NY 10024, USA (Received March 24, 1993; accepted in revised form May 27...Abstract-New Re-0s isotopic data on chromitites of the Stillwater Complex demonstrate isotopic equilibrium between...observed in chromitites and other rocks from the Stillwater Complex could result from interaction with these |  | | Journal (article/letter/editorial) | | 3 0 0 Elsevier Science Publishers B.V., A m s t e r d a m 279 Horizontal and vertical variations in...zones with small variations in the M g - n u m b e r of bronzite is taken to indicate that, in Zones...e d at the S y m p o s i u m "Physical a n d Chemical Processes in M a g m a C h a m b e r s " sponsored...n a l C o m m i s s i o n for Igneous a n d M e t a m o r p h i c Petrology, a S u b c o m m i s s i o...the "ore I 301OE ~: , 19'~Y~£ <:,:/,4,,,~A,,J,: ,el > ~ - ' " . t ~~' ~../ f I / I - ,. c>, |  | | Journal (article/letter/editorial) | | Nelson Lead isotopes in sul®des from the Stillwater Complex, Montana: evidence for subsolidus remobilization...suite of samples from the platiniferous J-M Reef of the Stillwater Complex were measured to elucidate the...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...chemical disturbance since their formation. The Stillwater Complex has been described in a recent review |
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