 | | 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...element and chromium deposits. K E Y WO R D S : Stillwater Complex, layered intrusions, J-M Reef, platinum-group |  | | Journal (article/letter/editorial) | | crystallization of the surrounding rock of the Stillwater Complex, Montana Samantha R. Baker1,2 · Alan E. Boudreau3...Abstract The Banded Series of the Archean-aged Stillwater Complex contains three thick anorthosites overlain...different liquid line of descent than the rest of the complex. Alternatively, it has been suggested that the...of the underlying anorthosites. Keywords Stillwater Complex · Layered intrusions · Troctolite · Igneous...Upper School, 3601 Ridge Rd., Durham, NC 27705, USA The reappearance of minerals such as olivine and |  | | 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...principal platinumgroup element deposit of the Stillwater complex, the J-M reef. OB I is characterized by a...crystallized layered igneous intrusions such as the Stillwater complex have traditionally been considered to have...that the highCl, high-Mg parent liquids of the Stillwater and Bushveld complexes, like their modern-day |  | | 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 stratigraphic |  | | Journal (article/letter/editorial) | | Volume 80, pages 1343-1346, 1995 The Stillwater Complex, Montana: A subvolcanicmagmachamber? Rosar-rNo...in the footwall of the Stillwater Complex, all of them coeval with the Stillwater in age.Two of the magma...range of 1.5-3 kbar implies that the depth of the Stillwater magma chamber was similar to that of subvolcanic...Volcano, which raisesthe possibility that the Stillwater magma body may also have been a subvolcanic reservoir...the basis of a limited number of 40o/o of the Complex has (1960) ples, inferred that Hess layeredmafic |  | 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) | | Block Intrusion (MBI) of the Lac des Iles Igneous Complex shows two pronounced trends in the halogens. Apatite...Sciences, Duke University, Box 90227, Durham, NC 27708, USA e-mail: boudreau@duke.edu L. Djon : A. Tchalikian...Block Intrusion (MBI) of the Lac des Iles Igneous Complex (LDIC) is a small, crudely concentrically zoned... Miner Deposita Complex (the UG-2 chromitite and the Merensky Reef) and the Stillwater Complex (the J-M reef)...between the Clrich apatite of the Bushveld and Stillwater complexes and the typically Cl-poor (<10 mol% |  | | Journal (article/letter/editorial) | | Hunt, et al. (1950) of albite, oligoclaseand anorthite which showed a marked difference jn the number...Valley, California J.R.S. w.N.S.E. Stillwater comPlex, Montana Miakejima, JaPan J.R.S. Greenland ...Bushveld complex, S. Africa Ciear Lake, Utah Stillwater complex, Montana Stillwater complex, Montana * Analyzedsamplesas...Si/AI molar ratio and the weight per cent of anorthite. This plot also suggeststhe possibility that the...-o' to 30 40 50 60 70 90 WEIGHT PERCENT ANORTHITE Frc. 2. Correlation of the wave length of the |  | | Journal (article/letter/editorial) | | olivine-bearing zones III and IV of the Stillwater Complex, Montana ± evidence for postcumulus ¯uid migration...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 McCallum...Grove The stratigraphic divisions of the Stillwater complex used in this report are summarized in Fig |  | | Book | | elements (PGE). Using examples from the Bushveld complex of South Africa and other intrusions, this book...One Liberty Plaza, 20th Floor, New York, NY 10006, USA 477 Williamstown Road, Port Melbourne, VIC 3207,...Deposits: Examples 2.4.1 The Bushveld Complex 2.4.2 The Stillwater Complex 2.4.3 Skaergaard Intrusion 10 10...Inclusions 7.2.1 Silicate Liquid Inclusions in the Stillwater Complex 7.2.2 Other Examples of Silicate Liquid Inclusions...Inclusions 7.3.1 Fluid Inclusions in the Stillwater Complex 7.3.2 Fluid Inclusions and Hydrosaline Melt |  | | 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 troctolite...the Bushveld Complex. The C-O-H-Cl system has been investigated for conditions of Stillwater and Bushveld...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 |  | | 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 acknowledgments...FIGURH 1. 2. 3. 4. 5. 6. 7. Index map of the Stillwater Complex ........................................ |  | | Journal (article/letter/editorial) | | 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...magnesium-bearing mine tailings. The Stillwater mine in Nye, Montana produces copper, nickel, and PGMs,... along with 1 Mt of tailings each year. Stillwater tailings samples have been characterized, revealing...structures at low-cost ambient conditions. The Stillwater tailings could be useful for developing strategies |  | | Journal (article/letter/editorial) | | from the Middle Banded series of the Stillwater Complex, Montana Received: 5 October 1995 y Accepted:...OB-IV) of the Middle Banded series of the Stillwater complex, occurring interstitial to cumulus grains...Duke University, Box 90227, Durham, NC 27708-0227, USA Editorial responsibility: T.L. Grove Introduction...concentration of platinum group elements in the Stillwater and Bushveld intrusions (Ballhaus and Stumpfl...zones III and IV (OB-III and OB-IV) of the Stillwater complex revealed no stratigraphic or lateral variation |  | Braun, Kristen, Meurer, William, Boudreau, Alan E., McCallum, I.S. (1994) Compositions of pegmatoids beneath the J-M Reef of the Stillwater Complex, Montana, U.S.A. Chemical Geology, 113 (3) 245-257 doi:10.1016/0009-2541(94)90069-8 | Journal (article/letter/editorial) | | pegmatoids beneath the J-M Reef of the Stillwater Complex, Montana, U.S.A. Kristen Braun a, William Meurer...aGeology Department, Duke University, Durham, NC 27706, USA bDepartment of Geological Sciences, A J-20, University...University of Washington, Seattle, WA 98195, USA (Received September 12, 1992; revised and accepted August...of the platiniferous J-M Reef of the Sfillwater Complex, but are less common in Norite zone II and Gabbronorite...on the discordant pegmatoidal rocks of the Stillwater Complex. These rocks are of interest not only for |  | | 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...detailed study of the mineralogy of the complex in 1935 after several periods in the field in preceding...Peoples would write the general geology of the complex, Howland the floor rocks and sulfide deposits,...have published a number of short papers on the complex. (Peoples, 1933; 1936; Howland, Peoples, and Sampson |  | | Journal (article/letter/editorial) | | Copyright © 1999 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/99 $20.00 1 .00 Pergamon...chamber: An example from the Freetown Layered Complex of Sierra Leone CHRISTOPHER I. CHALOKWU,*,1 EDWARD...29204, USA Department of Geological Sciences, Indiana University, Bloomington, Indiana 47405, USA 2 (Received...February 8, 1999) Abstract—The Freetown Layered Complex of Sierra Leone is a 7-km thick, rift-related tholeiitic...the opening of the middle Atlantic Ocean. The Complex was emplaced above Archean basement gneisses, granulites |  | | Journal (article/letter/editorial) | | Copyright © 1996 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/96 $15.00 + .00 Pergamon...University of New Mexico, Albuquerque, NM 87131-1126, USA 2Department of Geology and Geophysics, Woods Hole...Oceanographic Institute, Woods Hole, MA 02543-1541, USA (Received January 5, 1996; accepted in revised jbrm...terrestrial orthopyroxenites and norites (Stillwater Complex, Papike et al,, 1995). A synthesis of these...90 92 94 96 98 100 Anorthite Content (tool%) FIG. 1. Histograms of anorthite contents (mol%) of plagioclase |  | | 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.FICE...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) | | Origin of the UG2 chromitite layer, Bushveld Complex SISIR K. MONDAL AND EDMOND A. MATHEZ* DEPARTMENT...AMERICAN MUSEUM OF NATURAL HISTORY, NEW YORK, NY 10024, USA RECEIVED MARCH 6, 2006; ACCEPTED OCTOBER 30, 2006;...explain the chromitite layers of the Bushveld Complex, we have conducted a detailed study of the silicate-rich...the eastern and western limbs of the Bushveld Complex. Where we have studied the sequence in the central...peridotite sills associated with the Bushveld Complex indicating that geologically reasonable amounts |  | | Journal (article/letter/editorial) | | Reef in the Rustenburg section of the Bushveld Complex D . M . Nicholson i * and E.A. M a t h e z 2 1...98195 USA 2 Department of Mineral Sciences,AmericanMuseum of Natural History,New York, NY 10024 USA Received...Reef in the Rustenburg section of the Bushveld Complex has been developed based on detailed field and...address: 2756 NE 103rd St., Seattle, WA 98125, USA O f f p r i n t requests to ." E.A. Mathez Hydration...Introduction The Merensky Reef of the Bushveld Complex is a stratiform horizon of dominantly pegmatoidal |  | 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...and ultramafic cumulates from the 2700-Ma Stillwater Complex and associated fine-grained sills and dykes |  | | Report (issue) | | Carlsbad, and Pericline laws, developed in simple to complex combinations. Physical Properties: Cleavage: Perfect...the Bushveld complex, Transvaal, South Africa. In the USA, in the Stillwater complex, Montana; from Cornwall...(1966) The structure of bytownite (`body-centered anorthite'). Acta Cryst., 21, 782{801. All rights reserved |  | | Journal (article/letter/editorial) | | ruffle, and quartz. Accessory quartz hosts a complex suite of HzO-NaCI(CaClz)-CO2-CH4 fluid inclusions...Introduction The Merensky Reef of the Bushveld Igneous Complex, South Africa, not only hosts the world's largest...is enriched in anorthite and altered to chlorite. 2. Postcumulus quartz hosts a complex suite of high-temperature...Rustenburg Platinum Mines, southwestern Bushveld Complex. Investigations are restricted to the mineralized...the Merensky Reef. The geology of the Bushveld Complex, the structural setting of the Reef, and its petrography |  | | Journal (article/letter/editorial) | | 5-6 in the Upper Zone and correlate with the anorthite content of plagioclase. The initial 87Sr/86Sr...monotonically up-section (decreasing plagioclase anorthite content) to 0-7068 in the Upper Zone. These variations...the Stillwater Complex (Hess, I960, Jackson, 1961, McCallum et al., 1980) in southwestern Montana, the...Labrador, the Bushveld Complex (Willemse, 1969) in South Africa, the Duluth Complex (Weiblen & Morey, 1975)...Forester, 1979; Norton & Taylor, 1979). The Bushveld Complex (Hamilton, 1977) and the gabbros of NE Scotland |  | | 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...ryrocks,Stillwater-associated sillsanddikes,sulfideaccumulations near the baseof the complex,and pla...iron-formation, Stillwater-associated sillsanddikes,andbasalsulfideaccumulations in the complex(mean= -0.7%0);...constitutes the fide mineralsare presentin mostof the Stillwater PicketPin deposit(BoudreauandMcCallum,1986). |
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