• Michael Abratis | FriedrichSchillerUniversität Jena ...

    PGErich sulphides are notably absent and there are no discrete phases of Rh, Ir, Os and Ru. Common basemetal sulphides do not incorporate PGE detectable by EMPA, except of cobaltrich pentlandite that contains up to wt% Rh and wt% Pd.

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  • PGEEnrichment in MagnetiteBearing Olivine Gabbro: New ...

    FeTi oxides, traces of biotite and sulfide minerals such as pyrrhotite, chalcopyrite, and pentlandite (Figure3A,B). Olivine gabbro samples are typically composed of about 50% olivine, 30% plagioclase, 10–15% pyroxene, 5–10% FeTi oxides, and traces of sulfide minerals. Sulfide minerals in troctolite and

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  • ReOs Isotope Systematics of the Voisey's Bay NiCuCo ...

    However, data for sulfide (chalcopyrite, pyrrhotite, pentlandite) and oxide (magnetite, ilmenite) mineral separates from the Ovoid and a troctolite from the Eastern Deeps yield an isochron with an age of 1004 ± 20 Ma, consistent with ReOs TCHUR model ages for some low Os troctolites and olivine gabbros from the magmatic system. These data

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  • Petrology and geochemistry of the Kruuse Fjord Gabbro ...

    Pentlandite elongated, zoned plagioclase laths and very finegrained, forms flamelike exsolution lamellae in pyrrhotite and rounded clinopyroxene and Fe–Ti oxide grains in approx discrete grains adjacent to pyrrhotite and chalcopyrite. imately the same proportions as the host, but olivine is Some pyrrhotite grains are partly altered to magnetite. absent in the inclusions.

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  • 应助Plagioclase Fractionation in Troctolitic 下载 ...

    应助Plagioclase Fractionation in Troctolitic 百度云下载,收藏和分享。 应助Plagioclase Fractionation in Troctolitic 下载 百度云 百度网盘下载_盘多多 盘多多

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  • NDT VenturesProgress Report, Labrador Exploration ...

    The project is optioned from Rupert Resources Ltd. (VSE:RUP). The holes were drilled to test an eastwest troctolitic dyke system with associated ground EM conductors. Mineralization on the adjacent Consolidated Magna/Consolidated Viscount property occurs in northsouth gabbroic dykes adjacent to the eastwest troctolitic dyke.

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  • Silicon Investor (SI) The First Internet Community

    In a recent development on Tuesday afternoon Mr French advised the company that a third hole presently being drilled has intersected, in the first 80 ft of core, disseminated chalcopyrite, pyrrhotite, pentlandite mineralization on the gossan zone. The drill hole is set up on the gossan zone which fringes the west side of the conductor.

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  • Magnetite composition in NiCuPGE deposits worldwide ...

    Oct 01, 2014· Read "Magnetite composition in NiCuPGE deposits worldwide: application to mineral exploration, Journal of Geochemical Exploration" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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  • GRENVILLIAN METAMORPHISM OF THE SUDBURY DIABASE .

    Frc. l. Geology of the region southwest of Sudbury, Ontario (modified after Card Lumbers 1977, Card,l978) showing the extenJ of the Sudbury diabase dykeswarm in the Southern Province and correlative dykes of metadiabase in the Grenville

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  • Petrologic evolution of gneissic xenoliths in the Voisey's ...

    Nickel‐copper‐cobalt sulfide ores in the Voisey's Bay Intrusion are closely associated with troctolitic to gabbroic rocks that contain abundant country rock xenoliths. Potenti

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  • Serpentinized troctolites exposed near the Kairei ...

    In 2004, it recovered troctolitic rocks which potentially represent exhumed was suggested that a hydrogenbased hyperthermophilic subsurface lower oceanic crust. Although the uplift and emplacement processes lithoautotrophic microbial ecosystem (HyperSLiME) existed in the of the deepseated rocks are still unclear, the characteristic topo subseafloor environments of the KHF (Takai et al., 2004).

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  • Variations in Os isotope ratios of pyrrhotite as a result ...

    mineralization is found in many of the troctolitic and gabbroic rocks of the Basal Heterogeneous Zone; massive sulfide mineralization is found locally (Fig. 2a). Xenoliths of country rock are also common in the Basal Heterogeneous Zone. Most of the xenoliths are pelitic and thought to be derived from the ia Formation.

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  • HI HO SILVER RESOURCES INC ACQUIRES VOISEY'S BAY AREA ...

    The occurrence of troctolitic breccias with Tasiuyak Gneiss inclusions and disseminated sulphides is a characteristic of the Voisey's Bay deposit". The sulphide assemblage within the breccia at Garland Lake is dominated by pyrrhotite, with chalcopyrite and pentlandite. The amount of sulphides within the breccia matrix reaches 10%.

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  • Northwest Africa 8046 Lunar Meteorite

    Petrography: (C. Agee, UNM) his meteorite is a polymict breccia of fragmental feldspathic, troctolitic and mafic lithologies, as well as fragmental pyroxene, olivine, plagioclase grains, and .

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  • FLUID SEGREGATION ON THE CUNIPGE MINERALIZZATION .

    2. Magmatic CuNiPGE sulfide mineralization occurs in the troctolitic rocks of the Layered Series in the South Filson Creek area. Sulfide minerals (chalcopyrite, cubanite, pyrrhotite and pentlandite) form disseminations or patches in irregular shaped zones m in diameter in an area of about km2. These zones do not form layers or ...

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  • The Grenville Instruct

    Three major structural boundary zones (the Grenville Front and adjacent Grenville Front Tectonic Zone, the Central Metasedimentary Belt boundary thrust zone, and the ElzevirFrontenac boundary zone) have been identified across the region of the crosssection based on their prominent geophysical signatures comprising broad zones of southeast ...

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  • Lunar troctolitic anorthositic granulitic breccia ...

    Lunar troctolitic anorthositic granulitic breccia meteorite. This specimen originates from a tested and confirmed single stone Lunar troctolitic anorthositic granulitic breccia meteorite with a tkw grams Petrography: (A. Irving) Extremely fine grained anorthiterich assemblage with tiny grains of olivine (, FeO/MnO = 85), orthopyroxene and other minerals. similar to NWA 5744 and pairings

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  • Deciphering Magmatic and Metasomatic Processes Recorded by ...

    The troctolitic, Cu–Nisulfide mineralized Bathtub intrusion (BTI) of the 1·1 Ga Duluth Complex (NE Minnesota) was formed by multiple intrusive pulse We use cookies to enhance your experience on our continuing to use our website, you are agreeing to our use of cookies.

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  • Possible sources for CH4rich fluid inclusions in olivine ...

    Cumulus olivine from the Babbitt deposit in the troctolitic Bathtub intrusion (Duluth Complex) contains abundant CH4rich fluid inclusions with common hydrous silicate and carbonate precipitates at their inclusion walls. Given the active rifting environment in which the magmas of the Duluth Complex have intruded as repeated pulses, fluid

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