 | | 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 and...by ¯uids derived from sources external to the complex is favored. Analyses of the lead isotopic composition...composition of sul®des in veins which cut the complex indicate that a signi®cant fraction of the radiogenic...abundant secondary minerals (serpentine, talc, actinolite, chlorite and zoisite) associated with greenschist |  | | Journal (article/letter/editorial) | | Old Main, 1 University Dr., Pembroke, NC 28372, USA; chaumba@uncp.edu Received: 24 May 2017; Accepted:...Great Dyke, Bushveld Complex in South Africa, the Stillwater Complex in Montana, USA, and the Noril’sk Ni-Cu-(PGE)...Bushveld Complex [7] and in the J-M reef of the Stillwater Complex [8–11]. In the Stillwater Complex, researchers... similar to those described from the Bushveld Complex [55,56]. The footwall fault (Figure 2b) is encountered...at Fayetteville State University, North Carolina, USA [58]. For all silicate samples, the Hyperprobe was |  | | Journal (article/letter/editorial) | | PLATINUM-GROUP MINERALS IN THE J-M REEF, STILLWATER COMPLEX BÉLINDA GODEL,† Centre for Exploration Targeting...platinum-group element (PGE)–bearing J-M reef, Stillwater Complex (Montana). The aims of the study were to determine...such as the Bushveld Complex (South Africa) and the Stillwater Complex (Montana) contain stratiform layers...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) | | 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 to establish:...parental magma 1. Introduction The Stillwater Complex (Montana, U.S.A.) is a layered ultramafic to mafic...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). 274 |  | | Report (issue) | | 562(3) Z=8 X-ray Powder Pattern: Lac des Iles complex, Canada. Easily confused with braggite. 2.846 (100)...Russia; by electron microprobe. (2–3) Stillwater complex, Montana, USA; by electron microprobe. Polymorphism...keithconnite, palladian tulameenite (Stillwater complex, Montana, USA); hongshiite, cooperite, sperrylite...isomertieite, magnetite, bornite, polydymite, diopside, actinolite, epidote (Yen deposit, China). Distribution:...the Upper and Banded portions of the Stillwater complex, Montana; from near Moapa, Clark Co., Nevada; |  | Rifai, Kheireddine, Özcan, Lütfü-Çelebi, Doucet, François R., Rhoderick, Kyle, Vidal, François (2020) Ultrafast Elemental Mapping of Platinum Group Elements and Mineral Identification in Platinum-Palladium Ore Using Laser Induced Breakdown Spectroscopy. Minerals, 10 (3) 207 doi:10.3390/min10030207 | Journal (article/letter/editorial) | | Drilling, 2990 N Townsend Ave, Montrose, CO 81401, USA; krhoderick@firstdrilling.com (K.R.); vidal@emt.inrs...containing palladium and platinum from the Stillwater mine in Montana, USA, was cut and a LIBS scan of 40 mm ×...zone of the Stillwater Igneous Complex, a layer mafic intrusion in Southwestern Montana. There are three...three generalized zones within the complex, the Basal, the Ultramafic and the Banded Series. The Banded...is similar to the Merensky Reef of the Bushveld complex of South Africa. The JM Reef consists of one to |  | | Journal (article/letter/editorial) | | interstitial clinopyroxene is often altered to actinolite/tremolite and locally biotite. Interstitial chromite...these minerals, which predominantly altered to actinolite/tremolite, serpentine and magnetite. Hydrothermal...corroded and recrystallized during the formation of actinolite/tremolite, and then, cooperite and moncheite...mafic–ultramafic intrusions, such as the Bushveld Complex in South Africa, the Noril’sk Ni–Cu– (PGE) district...district in Siberia, and the Stillwater Complex in the USA, is commonly thought to be magmatic (Campbell |  | | 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 in...in the Stillwater mine, in Montana, occurs intergrown with secondary Fe–Ni–Cu sulfide; together, they...samples (>20 vol.%) from the J–M Reef at the Stillwater mine and elsewhere along the strike of the reef...desulfurization, alteration, J–M Reef, Stillwater Complex, Montana. Sommaire L’alliage Pt–Fe (Pt3Fe) faisant |  | Park, Y.-R., Ripley, E. M., Miller, J. D., Li, C., Mariga, J., Shafer, P. (2004) Stable Isotopic Constraints on Fluid-Rock Interaction and Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota. Economic Geology, 99 (2) 325-338 doi:10.2113/gsecongeo.99.2.325 | Journal (article/letter/editorial) | | the 1.1 Ga Midcontinent rift-related Beaver Bay Complex, is a 1,200-mthick, strongly differentiated, layered...such as the Bushveld (Merensky reef) and Stillwater Complex (J-M reef) mostly occur near the transition...include PGE-rich intervals in the Freetown layered complex (Bowles, 2000), the Lake Owen intrusion (Louckes...Intrusion O RI E P U S MESOPROTEROZOIC BEAVER BAY COMPLEX AND MISCELLANEOUS INTRUSIONS Mafic Intrusions Felsic...Felsic Intrusions Logan Intrusions DULUTH COMPLEX Layered Series (MLI) 47 Anorthositic Series o E |  | 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...Carolina 27708, USA AC CE PT ED M AN Keywords: Sulfur isotopes, Stillwater Complex, J-M Reef, secondary |  | Cowden, A., Ruddock, R., Reay, A., Nicolson, P., Waterman, P., Banks, M. J. (1990) Platinum mineralisation potential of the Longwood Igneous Complex, New Zealand. Mineralogy and Petrology, 42 (1) 181-195 doi:10.1007/bf01162690 | Journal (article/letter/editorial) | | Mineralisation Potential of the Longwood Igneous Complex, New Zealand A. C o w d e n 1, R. R u d d o c k...Igneous Complex is situated at the southern tip of the South Island of New Zealand. The Complex is 32 km...volcanic, volcaniclastic and intrusive rocks. The complex is comprised of an extensive series of layered...gabbro zones within the Banded Series of the Stillwater Complex. The mineralised rocks are leucocratic plagioclaseolivine...and its host rocks to the JM Reef of the Stillwater Complex and AP and PV mineralisation of the Penikat |  | | Journal (article/letter/editorial) | | such as the Bushveld Complex (South Africa) or the Stillwater Complex (Montana, USA) contain layers enriched...Merensky Reef (Bushveld Complex, South Africa) and the J-M Reef (Stillwater Complex, USA) and their Relationship...VOLUME 47 GEOLOGICAL SETTINGS Bushveld Complex The Bushveld Complex (Fig. 1a) is by far the largest layered...intrusion in the world (Eales & Cawthorn, 1996). The complex is 2054 28 Ma old (Harmer & Armstrong, 2000)...The ultramafic and mafic rocks of the Bushveld Complex are referred as the Rustenburg Layered Suite (South |  | 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) | | COMMUNICATIONS REPLACEMENT OF BASE METAL SULFIDES BY ACTINOLITE, EPIDOTE, CALCITE, AND MAGNETITE IN THE UG2 AND...AND MERENSKY REEF OF THE BUSHVELD COMPLEX, SOUTH AFRICA CHUSI LI,† EDWARD M. RIPLEY, ENRIQUE MERINO,...and the Merensky reef in the western Bushveld Complex has produced four common replacements: (1) replacement...replacement of sulfides and orthopyroxene by actinolite or tremolite, (2) replacement of sulfides and plagioclase...Introduction The UG2 and Merensky reef of the Bushveld Complex are the major sources of platinum group elements |  | 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...the rocks from the Ultramafic series of the Stillwater Complex are enriched in PGE relative to most mafic...the enrichment occurred in the case of the Stillwater Complex and applied our results to the chromite layers...Geological Survey, Spokane Office, Spokane, WA, USA whole rock and magnetite rims around the sulfides...Chromite . Laurite . Ultramafic series . Stillwater Complex Introduction Most of the world’s primary |  | | 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...crystallization ages for the reef and the Stillwater Complex. All samples are coarse grained to pegmatitic...crystallization of the Lower Banded series of the Stillwater Complex. The recognition that zircon can be successfully...intrusions worldwide. Introduction The Archean Stillwater Complex is a large mafic-ultramafic layered intrusion |  | | Journal (article/letter/editorial) | | Variations Within Layered Sills of the Deer Lake Complex, Minnesota Edward M. Ripley 1, B.V. Rao l, and...Indiana 47405, USA z Department of Geology, State University College, Fredonia, NY 14063, USA Abstract. Layered...components of an igneous series known as the Deer Lake Complex. Differentiation in the sills is simple: a basal...morphologically complex and exhibit textures characteristic of supercooling. The Complex has undergone...greenschist regional metamorphism. Olivine in the Complex ranges only from Fost to Fos5. Clinopyroxene in |  | | Journal (article/letter/editorial) | | High-temperature carbonate minerals in the Stillwater Complex, Montana, USA Hannah M. Aird • Alan E. Boudreau...platiniferous Johns-Manville (J-M) reef of the Stillwater Complex in a stratigraphic section that has been...serpentinite) that occur locally throughout the complex. The association of high-temperature carbonates...Ocean Sciences, Duke University, Durham, NC 27708, USA e-mail: hannah.aird@duke.edu them at a higher stratigraphic...J-M reef of the Stillwater Complex and the analogous Merensky reef of the Bushveld Complex in South Africa |  | | Journal (article/letter/editorial) | | Zircon from the Anorthosite zone II of the Stillwater Complex as a U–Pb geochronological reference material...Zircon from the Anorthosite zone II of the Stillwater Complex as a U–Pb geochronological reference material...Zircon from the Anorthosite zone II of the Stillwater Complex as a U-Pb SC RI geochronological reference...Anorthosite zone II (AN2) of the Neoarchean Stillwater Complex (Montana, USA) is a TE D candidate for an Archean...ratios determined by LA-ICP-MS are variable in Stillwater AN2 zircon (e.g., U = 54-585 ppm, Hf = 5500-9800 |  | | 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...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...be productive sources of mineral specimens. The Montana Gold Rush After giving up on the California gold...largest gold nugget found in Montana; it is displayed at (and owned by) the Montana Bureau of Mines and Geology |  | | Report (issue) | | (OH)0.05 F0.04 ]Σ=1.00 . (2) Fairfax, Virginia, USA; H2 O calculated for stoichiometry, corresponding...granite pegmatite. In meteorites. Association: Actinolite, diopside, calcite, quartz, talc (Bob’s Lake... titanite, datolite (Bull Run quarry, Virginia, USA); olivine, orthopyroxene, phlogopite, ferroalluaudite...Distribution: Analyzed material noted from: in the USA, the Fairfax quarry, Centreville, Fairfax Co., and...quarry, Loudoun Co., Virginia; at the Stillwater complex, Montana; in the White Picacho district, Maricopa |  | Mogessie, A., Stumpfl, E. F., Weiblen, P. W. (1991) The role of fluids in the formation of platinum-group minerals, Duluth Complex, Minnesota; mineralogic, textural, and chemical evidence. Economic Geology, 86 (7) 1506-1518 doi:10.2113/gsecongeo.86.7.1506 | Journal (article/letter/editorial) | | the Formationof Platinum-GroupMinerals,Duluth Complex,Minnesota:Mineralogic,Textural, and ChemicalEvidence...altered, calcicplagioclase(•An75), prehnite, actinolite,hornblende,and chlorite. ThePdbismutho-tellurides...interpretation. Introduction Ir values for the Stillwater, Bushveld, and Duluth Complexes arecalculated...datanowavailableandpresently terns in the Bushveld, Stillwater and Duluth Com- beingacquiredfor the Duluth Complexindicatethat...sulfideore, (2) PGE associated with 910.5 for the Stillwater, and 12.66 to 20.67 for the chromespinel-richrocks |  | | Journal (article/letter/editorial) | | MESOARCHEAN GRANITIC ROCKS, BEARTOOTH MOUNTAINS, MONTANA, USA: INDICATORS FOR BARIUM METASOMATISM DARRELL...University, E235 Howe-Russell-Kniffen Geoscience Complex, Baton Rouge, Louisiana 70803, U.S.A. PAUL A....rocks from the eastern Beartooth Mountains of Montana, USA shows evidence of significant Ba metasomatism...gneiss from the eastern Beartooth Mountains, Montana, USA. The xenolith contains complexly zoned Ba-rich...older (up to 3.5 Ga) lithologies, and (2) the Montana Metasedimentary Terrane (MMT) containing a variety |  | | Journal (article/letter/editorial) | | MINERALIZATION IN THE FOOTWALL OF THE SUDBURY IGNEOUS COMPLEX, ONTARIO, CANADA JACOB J. HANLEY† Department of...Abstract Alteration veins containing Cl-poor actinolite and actinolitic hornblende are a common feature...along the northern margin of the Sudbury Igneous Complex, Ontario, Canada. Crosscutting relations and structural...and Naldrett, 1999, Huminicki et al., 2008; Stillwater Complex: McCallum et al., 1980, 1999; Polovina et...the mineralized footwall of the Sudbury Igneous Complex; (2) discuss the origin of the amphiboles in light |  | | Journal (article/letter/editorial) | | Sulfide-associated mineral assemblages in the Bushveld Complex, South Africa: platinum-group element enrichment...zones such as the Merensky Reef of the Bushveld Complex has previously received only scant attention, yet...Sciences, Duke University, Box 90227, Durham, NC 27708, USA e-mail: boudreau@duke.edu W. Kanitpanyacharoen e-mail:...307 McCone Hall, Berkeley, CA 94720-4767 90410, USA first-order features of the Bushveld ore metal distribution...top during vapor degassing. Keywords Bushveld Complex . Igneous sulfide . Platinumgroup element deposits |  | Barkov, A. Y., Fleet, M. E., Martin, R. F., Halkoaho, T. A.A. (2005) New data on "Bonanza"-type PGE mineralization in the Kirakkajuppura PGE deposit, Penikat layered complex, Finland. The Canadian Mineralogist, 43 (5) 1663-1686 doi:10.2113/gscanmin.43.5.1663 | Journal (article/letter/editorial) | | THE KIRAKKAJUPPURA PGE DEPOSIT, PENIKAT LAYERED COMPLEX, FINLAND ANDREI Y. BARKOV§ AND MICHAEL E. FLEET...Penikat layered complex, Finland. The PGM are intimately associated with actinolite and clinochlore....is located near the northern end of the Penikat complex. Keywords: platinum-group elements, platinum-group...mineralization, Kirakkajuppura deposit, Penikat layered complex, Fennoscandian Shield, Finland. SOMMAIRE On trouve...element (PGE) deposit is hosted by the Penikat complex, Finland, a mafic–ultramafic layered intrusion |
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