 | | 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...Os)S2] (laurite), and Au-Pd-Ag alloy (palladian electrum). These minerals account for all the Pt, half...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 |  | | Journal (article/letter/editorial) | | (PGE) district in Siberia, and the Stillwater Complex in the USA, is commonly thought to be magmatic...Bushveld Complex (Li et al. 2004) and JM reef in the Stillwater Complex (Boudreau and McCallum 1992; Meurer et...atokite-rustenburgite. Other platinum-group minerals and electrum Other PGM are Pt–Fe alloy (12 grains), irarsite...(PdSb) (two groups of grains). Seven grains of electrum are also associated with PGM grains. 0.068 Sn...95Sn1.00 Chemical compositions of these PGM and electrum are listed in Table 3. Several Pt–Fe alloy grains |  | | Journal (article/letter/editorial) | | Fault Evolution at the Dixie Comstock Mine, Churchill County, Nevada PETER G. VIKRE ASARCOIncorporated... Gold ore at the Dixie Comstockmine, Churchill County,Nevada,is composedof quartz breccia,quartzstockwork...situatedon the eastern margin of the Stillwater Range, Churchill County,Nevada,about 110 mi eastof Reno (Fig...(Fig. 1). The range margin, which separatesthe Stillwater Rangeto the west from Dixie Valley to the east...ranges and valleys (Wallace, 1984; Oldow, 1992). The mine was discoveredin 1934 by panning drainagesalongthe |  | Zaccarini, F., Anikina, E., Pusharev, E., Rusin, I., Garuti, G. (2004) Palladium and gold minerals from the Baronskoe-Kluevsky ore deposit (Volkovsky complex, Central Urals, Russia) Mineralogy and Petrology, 82 (1) 137-156 doi:10.1007/s00710-004-0049-1 | Journal (article/letter/editorial) | | stoichiometries. The main carrier of Au is Pd-rich electrum, approaching the composition Au75Ag15Pd10, with...crystallization events in the order: 1) Cu–Pd sulfides þ electrum, 2) replacement by Pd–Te–As and late Pd–As PGM...stillwaterite, a group of unknown Pd–As–Te minerals and electrum. One small grain (<2 mm) of Pt-bearing Cu sulfide...may contain small inclusions of kotulskite and electrum, that are likely to be exsolution products (Figs...stillwaterite, Pd8(Te,As)3 Te-rich stillwaterite (?), Au Electrum, Kt kotulskite, Pd3(Te,As) Te-rich vincentite |  | | 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...parental magma 1. Introduction The Stillwater Complex (Montana, U.S.A.) is a layered ultramafic to mafic...stratigraphy 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) |  | | Journal (article/letter/editorial) | | Reef from Frank Shaft No.1 at Rustenburg Platinum Mine revealed the presence of a Pt-Fe-alloy, probably...arsenides (21 vol.%), bismuthotellurides (10 vol.%), electrum (9 vol.%) and platinum group element- (PGE-) sulfides...Pilanesberg Complex, see Fig. 1a). At the Impala Mine (Fig. 1a), the so-called ‘contact reef’ comprises...which were collected in the 1970’s at Rustenburg Mine (Frank Shaft No.1). After petrographic analyses...sperrylite, 10.0 vol.% bismuthotellurides, 9.0 vol.% electrum, 1.0 vol.% laurite, 1.0 vol.% rustenburgite, and |  | | 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...view showing the Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded...mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many fine crystal |  | | Journal (article/letter/editorial) | | Pt–Pd–Ni tellurides accompanied by Ag–Te, with minor electrum and native Au, and (ii) Pd alloys accompanied...in the Bushveld Complex or the J–M Reef in the Stillwater Complex that are only a metre or so thick (Maier...zone, MBS604 and MBS605 was sampled with the aid of mine assay data (Figs. 3 and 4) in order to select the...with anomalous Pt and Pd contents. The commercial mine assay data were determined from one metre composite...ppm (capped at 1 ppm due to the accuracy of the mine assay data). Pd/Pt ratios are typically ,1 over |  | | Journal (article/letter/editorial) | | X X X * A u / A u - A ~ alloys: Gold Au Electrum AurA ~ X A ~ - P b - T e alloys * Pt-Fe alloys...seldom in contact with unaltered pyroxene. Gold, electrum and other Au alloys are predominatly silicate-hosted...exhibit a wide range of sizes, between 3 and 20 ~tm. Electrum, native gold and Au alloys are relatively coarse-grained...being joined by cumulus bronzite higher in I o-u Electrum/Au lag the sequence. Repeated minor magma influxes...= Total P t - P d bismuthotellurides; Au/Ag = Electrum and Au alloys. 626 B. M. COGHILL AND A. H. |  | McCallum, M. E., Loucks, R. R., Carlson, R. R., Cooley, E. F., Doerge, T. A. (1976) Platinum metals associated with hydrothermal copper ores of the New Rambler Mine, Medicine Bow Mountains, Wyoming. Economic Geology, 71 (7) 1429-1450 doi:10.2113/gsecongeo.71.7.1429 | Journal (article/letter/editorial) | | Wyoming, showing the location of the New Rambler mine with respectto the Mullen CreekNash Fork shear zone...activeintermittently through Laramide time. Shear zone rocks the mine is a mylonitic biotite-epidote-plagioclase comprisea...mafic plutoniccomplexesand ortho- prevalentin the mine vicinity. Most abundantare metadioriteand metagabamphibolites...duction from Precambrian ores. pyroxenitein the mine workingsconsistschieflyof uralitizedort.hopyroxeneand...1926) •tbout eight miles northeastof the New Rambler mine. in outcrop area, is exposeda few .hundredyards |  | | Journal (article/letter/editorial) | | (PMM) including hessite (Ag2Te), Pd-Ag tellurides, electrum, and native Au are observed in the Santa Rita...tellurides accompanied by Ag tellurides, minor electrum, and native Au in both the Santa Rita ore zone...respectively. Sampling was completed with the aid of mine assay data to identify samples with the highest...magnifications of up to 15,000× are possible. Commercial mine assay data were obtained from 1-m composite intervals...series ([RhIrPt]AsS). Minor Ag-Pd-Te minerals, electrum ± Fe-Cu, and native Au grains are observed, with |  | | 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) | | ARTICLE The Lower Banded series of the Stillwater Complex, Montana: whole-rock lithophile, chalcophile,...rock types of the Lower Banded series of the Stillwater Complex are gabbronorite and norite with minor...Ave Ste 202, Spokane, WA 99201, USA Miner Deposita Keywords Stillwater Complex . Lower Banded series...Bushveld Complex of South Africa, the Stillwater Complex of Montana (USA), the Great Dyke of Zimbabwe, and...1980s, intensive work was carried out on the Stillwater Complex. There has been a steady stream of subsequent |  | McDonald, Andrew M., Cabri, Louis J., Stanley, Chris J., Good, David J., Redpath, Jason, Lane, Geoff, Spratt, John, Ames, Doreen E. (2015) Coldwellite, Pd3Ag2S, A New Mineral Species From the Marathon Deposit, Coldwell Complex, Ontario, Canada. The Canadian Mineralogist, 53 (5) 845-857 doi:10.3749/canmin.1500020 | Journal (article/letter/editorial) | | (48º48'7''N, 86º18'35''W), which is owned by Stillwater Canada Inc. The concentrate, created for met...studied by Cabri Consulting Inc., under contract to Stillwater Canada Inc. to conduct a quantitative mineralogical...the Birch Lake deposit, Duluth complex, Minnesota, USA [Severson & Hauck 2003, Table 7d (p. 139) from the...from 1 With the exception of one Au-Ag alloy (“electrum”), mineral nomenclature conforms to minerals approved...and Classification (CNMNC) of the International Mine‐ ralogical Association (IMA). The reason is simply |  | | Journal (article/letter/editorial) | | anorthosite and mixed rock of the J-M Reef of the Stillwater Complex (cf. Bow et al., 1982; Campbell et al...et al., 1985; Barnes and Naldrett, 1986). The Stillwater rocks contain cumulus olivine, however, which...The gold present in the Reef occurred either as electrum or as native gold. 24~ of the PGM grains identified...AJ (1986) Geochemistry of the J-M Reef of the Stillwater Complex, Minneapolis Adit area II. Silicate mineral...(1982) Investigations of the Howland Reef of the Stillwater Complex, Minneapolis Adit area: stratigraphy |  | Neyedley, Kevin, Hanley, Jacob J., Falck, Hendrik, Bodnar, Robert J., Fedele, Luca, Fayek, Mostafa, Sharpe, Ryan (2019) Sulfide melt inclusions associated with magmatic Ni-Cu-platinum-group element (PGE) mineralization in the Caribou Lake Gabbro, Blatchford Lake intrusive suite, Northwest Territories, Canada. Ore Geology Reviews, 107. 513-531 doi:10.1016/j.oregeorev.2019.02.009 | Journal (article/letter/editorial) | | molybdenite, tellurobismuthite (Bi2Te3), altaite (PbTe), electrum, nickeline, melonite (NiTe2), empressite (AgTe)...Nunavut: Campos-Alvarez, et al., 2012; Stillwater Complex, Montana: Polovina et al., 2004, Hanley et al...molybdenite, tellurobismuthite (Bi2Te3), altaite (PbTe), electrum (Au:Ag ratio ~70:30 at %), nickeline, melonite...composed of gersdorffite (Fig. 3K). Grains of electrum are present as anhedral inclusions within glaucodot-gersdorffite...glaucodot-gersdorffite grains inclused in pyrrhotite, and electrum grains are ≤ 6 µm. No PGM are observed in the |  | Dare, S. A. S., Barnes, S.-J., Prichard, H. M., Fisher, P. C. (2010) The Timing and Formation of Platinum-Group Minerals from the Creighton Ni-Cu-Platinum-Group Element Sulfide Deposit, Sudbury, Canada: Early Crystallization of PGE-Rich Sulfarsenides. Economic Geology, 105 (6) 1071-1096 doi:10.2113/econgeo.105.6.1071 | Journal (article/letter/editorial) | | sperrylite (PtAs2: 9%), michenerite (PdBiTe: 5%), and electrum (AgAu2: 0.1%). These discrete minerals are predominantly...al., 1969). The Main embayment at the Creighton mine plunges northwest extending 3 km (1200 ft.) along...surface (open pit, 2.5 km west of the Creighton mine) and is connected to the 402 orebody at depth, which...BMS/Mt Sil 2 7 Mt present in % of samples 100 43 Electrum (AgAu2) Hessite (Ag2Te) (Re-Fe-Mo-Cu-Os-S) (Re-Fe-Pb-Bi-S)...S Fe Ni CR8B_3 CR7_23 Pd Sample no. 1.4 Electrum Pn CR14_24 Rhenium sulfides Host Sample no |  | Han, Chunming, Xiao, Wenjiao, Zhao, Guochun, Qu, Wenjun, Du, Andao (2007) Re–Os dating of the Kalatongke Cu–Ni deposit, Altay Shan, NW China, and resulting geodynamic implications. Ore Geology Reviews, 32 (1) 452-468 doi:10.1016/j.oregeorev.2006.11.004 | Journal (article/letter/editorial) | | (Russia; Walker et al., 1994), the Stillwater Complex (Montana, USA; Lambert et al., 1989; Martin, ⁎ Corresponding...Cu–Ni– PGE deposit, Sudbury, Canada Stillwater PGE deposit, Montana, USA Norll'sk I and Talnakh intrusions...There are nine orebodies in the Kalatongke deposit mine. Among these the No. 1 orebody is the largest; it...minerals have been reported from the Kalatongke mine (Chen et al., 2004). Ore minerals are dominantly...michenerite, bitepalladite, sperrylite, hessite and electrum. Gangue minerals are mainly olivine, pyroxene |  | | Journal (article/letter/editorial) | | (1981)Cyanophillite, a new mineral from the Clara Mine, near Oberwolfach, Central Black Forest. Chem. der...chrysocolla, brochantite, and tripuhyite at the Clara Mine near Oberwolfach, Black Forest, Germany. The name...zone of 2.660(EX220),r.677Q)(Js0,t32). the Tsumeb mine, associated with duftite, tsumcorite, and The mineral...gittinsite have max length about 0.1 mm. H Tsumeb Mine. Type material is at the Univ. of Stuttgart, 3VA...of Toronto. M.F. Pt tellurides from Stillwater complex, Montana. Can. Mineral., 17, 589-594. Goosecreekite* |  | | Report (issue) | | (WMR, Menlo Park) has mapped in the southern Stillwater Range primarily on the La Plata Canyon, Table...intrusion that crops out in the West Humboldt, Stillwater, and Clan Alpine Ranges. Previous interpretations...may be acquired in the future for parts of the Stillwater and West Humboldt Ranges. These data may allow...the Reno sheet. This report includes prospect and mine descriptions and results of geochemical analyses...rocks of the lopolith from the West Humboldt, Stillwater, and Clan Alpine Ranges, as well as outcrops |  | Grokhovskaya, T. L., Distler, V. V., Klyunin, S. F., Zakharov, A. A., Laputina, I. P. (1992) LOW-SULFIDE PLATINUM GROUP MINERALIZATION OF THE LUKKULAISVAARA PLUTON, NORTHERN KARELIA. International Geology Review, 34 (5) 503-520 doi:10.1080/00206819209465618 | Journal (article/letter/editorial) | | series, palladium-bearing pentlandite, hessite, electrum, and native gold occur in close association with...rare minerals; it was found previously in the Stillwater and Lac des lies plutons [10]. In the Lukkulaisvaara...spectra match those of stillwaterite from the Stillwater pluton [10]. The composition of the mineral corresponds...fine (15-20 urn) segregations in association with electrum and telargpatite in chalcopyrite of the bornite-chalcopyrite...paragenesis with sopcheite in the presence of electrum associated with telargpalite. In anorthosite, |  | | Book | | Refining the Classification Using McCreedy West Mine and Podolsky Project Case Studies 163-180 C.E.G...369-390 18. Discovery of the J-M Reef, Stillwater Complex, Montana: the role of soil and silt platinum and...Dyke, Zimbabwe - Case Study of the Hartley Platinum Mine A.H. Wilson, R.T. Brown 409-429 20. The Platinova...BUSHVELD COMPLEX UG2 Chromitite Merensky Reef STILLWATER COMPLEX GREAT DYKE MUNNI MUNNI INTRUSION SKAERGAARD...REFINING THE CLASSIFICATION: USING McCREEDY WEST MINE, AND PODOLSKY PROJECT CASE STUDIES C.E.G. Farrow |  | | Journal (article/letter/editorial) | | first grouped into aurian silver (<50 at. % Ag), electrum (50-80 at.% Ag, and gold (>80 at. % Ag). Compositions...unpublished reports for Marathon PGM Corporation (now Stillwater Canada Inc., 2006 and 2007) and a report on Marathon...Acknowledgments The authors wish to thank John McBride of Stillwater Canada Inc. for support throughout this study...analytical work. This work was partly funded by Stillwater Canada Inc. and the Geological Survey of Canada’s...processed sample from the Coldwell Complex for Stillwater Canada Inc., Confidential Report 2014-01. 52 |  | | Report (issue) | | Nb-Cr-rutile Nickel-mackinawite Palladic platinum Pd-electrum Potassium richterite Pt-Sb-sobolevskite Pyrandine...California, U.S.A. (Switzer and Bailey, 1953); Mihara mine, Okayama Prefecture and at Fuka, Okayama Prefecture...crystals in one mineralised pocket in the Wessels mine, Farm Wessels 227, Hotazel district, Northern Cape...1960) and in the Barringer Hill pegmatite, Llano County, Texas, U.S.A (Marble, 1940). Manganoan varieties...1972); also from pegmatites at Ragged Peak, Tuolumne County, California, U.S.A (Hutton, 1951 a) and at Chari |  | | Report (issue) | | exploration, and assessment of abandoned mine lands and mine-site remediation. This compilation presents...smelting. For example, the environmental signature of a mine site may include metal contents and suites in minedrainage...readily soluble secondary salts associated with mine waste. The "environmental effects" of mineral deposits...including, for example, the environmental effects of a mine drainage on a river into which the drainage flows...release of metals into the environment from solid mine or mineral processing wastes. Although the relative |
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