pentlandite in peridotite

Chemistry and origin of mantle sulfides in spinel
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Neogene to Quaternary alkaline basalts from the Nógrád-Go 168 mo 168 r Volcanic Field NGVF in the Carpathian-Pannonian Region of northern Hungary and southern Slovakia contain a large number and great variety of sulfide-bearing mantle xenoliths A previous detailed textural and chemical study of spinel peridotite Cr-diopside xenoliths from the NGVF identified multiple mantle processes ie...

PENTLANDITE Fe Ni 9S8 A widespread nickel mineral
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the partly serpentinized Yellow Dog peridotite plagioclase lherzolite body represented by two outcrops in sections 11 and 12 T50N R29W Klasner et al 1979 Other species in the sulfide assemblage are major pyrrhotite chalcopyrite minor pyrite cubanite and trace mackinawite marcasite bornite and covellite Pentlandite...

Horomanite Fe Ni Co Cu 9S8 and samaniite Cu2 Fe Ni 7S8
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akiite and pentlandite from the Horoman peridotite massif sown in Figure 3 The difference in the composition of these mineral is clarified in this figure It is possible that horomanite exhibits a limited a solid-solution in term of Fe content preset over an internal of 551 to 604 apfu Fig 4 This trend is very similar to that of...

Sulfide minerals from the Horoman peridotite Hokkaido Japan
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Ni-bearing minerals such as pentlandite heazlewoodite unknown sulfide minerals X Y and Z are found in the Horoman peridotite Hokkaido Japan Cu-rich mineral of talnakhite bornite and native copper also occurs associating with Ni-bearing minerals Pentlandite has the compositional range from 4276 to 5238 in atomic ratio of Fe total...

Pyrrhotite Mineral information data and localiti
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Pyrrhotite is found with pentlandite in basic igneous rocks veins and metamorphic rocks It is also often found with pyrite marcasite and magnetite It has varying magnetic powers depending on the number of Fe vacancies in the crystal structure...

Sulphide Mineralogy in Peridotite Xenoliths from the
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representative of the peridotite xenoliths from the El Aprisco and Cerro Pelado Fig 1 Based on reflected light microscopy and EDS spectra obtained by means of VPSEM three main different sulphides were distinguished pentlandite Pn pyrrhotite Po and chalcopyrite Cp Although some grains of pentlandite and pyrrhotite were found as single...

Chromite platinum group elements and nickel
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Disseminated Ni mineralisation as awaruite 177 magnetite 177 ferritchromit 177 heazlewoodite 177 pentlandite 177 native Cu occurs in serpentinised peridotites and was likely produced as a by-product of hydration as a result of detachment faulting allowing penetration of seawater into underlying mantle peridotite...

Abiotic methane synthesis and serpentinization in olivine
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Sep 03 2019 0183 32 Methane Abundance in Oceanic Peridotite and Gabbro Examination of gabbro n = 43 and peridotite n = 117 in thin sections with relict olivine revealed the presence of fluid inclusions in rocks from each of the field locations shown in Fig 1All of the olivine-bearing gabbro samples and 77 of the peridotite samples contain fluid inclusions hosted in olivine...

Cobalt and precious metals in sulphides of peridotite
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Jan 01 2016 0183 32 Cobalt and precious metals in sulphides of peridotite xenoliths and inferences concerning their distribution according to geodynamic environment A case study from the Scottish lithospheric mantle Stockwork texture between pentlandite and pyrrhotite with minor chalcopyrite as distinct non-intergrown phas Overall this is an example of a...

Peridotite
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Peridotite is a dense coarse-grained igneous rock consisting mostly of the silicate minerals olivine and pyroxenePeridotite is ultramafic as the rock contains less than 45 silicaIt is high in magnesium Mg 2 reflecting the high proportions of magnesium-rich olivine with appreciable ironPeridotite is derived from Earth s mantle either as solid blocks and fragments or as crystals...

Hydrothermal processes in partially serpentinized
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Native metals and metal alloys are common in serpentinized ultramafic rocks generally representing the redox and sulfur conditions during serpentinization Variably serpentinized peridotites from the Santa Elena Ophiolite in Costa Rica contain an unusual assemblage of Cu-bearing sulfides and native copper The opaque mineral assemblage consists of pentlandite magnetite awaruite pyrrhotite...

Peridotite Mineral information data and localiti
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A peridotite is an ultramafic rock containing more than 40 olivine Mg 2 SiO 4 A general term for a coarse-grained plutonic rock composed chiefly of olivine with or without other mafic minerals such as pyroxenes amphiboles or micas and containing little or no feldspar...

Pentlandite
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Pentlandite sulphide of iron and nickel - heazlewoodite in Catalogue of the Minerals of Tasmania Mines Department Tasmania 134-135 Alsén N 1925 Röntgenographische Untersuchung der Kristallstrukturen von Magnetkies Breithauptit Pentlandit Millerit und verwandten Verbindungen Geologiska Föreningens i Stockholm Förhandlingar 47 19...

Nickel Deposits of
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of pyrrhotite F6t-4 S and associated pentlandite Fe Ni 988 and chalcopyrite CuFeS2 Many of the deposits contain minor but re 173 coverable amounts of platinum metals cobalt and selenium These deposits occur in or near peridotite or norite intrusions and are gen 173 erally considered to be genetically related to them The sulfides occur...

Sulfide mineralogy and chalcophile and siderophile element
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Sulfide mineralogy as well as chalcophile and siderophile element geochemistry have been investigated in samples of the peridotite massifs of Baldissero Balmuccia and Finero Western Italian Alps These massifs are supposed to represent a suite of mantle fragments affected by various degrees of partial melting beneath an area of plate collision...

Peridotites February 2011
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The other reason is that the peridotite body hosts a large body of semi-massive and massive sulfides mainly chalcopyrite and pentlandite A large mining company is in the process of developing these resourc This image is a full thin section view of Yellow Dog peridotite plagioclase lherzolite...

PENTTANDITE COMPOSITIONS AND ASSOCIATIONS IN SOME
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Pentlandite-bearing assemblages lrom 21 Canadian deposits that re-present a wide range of geological environments were collected as part Peridotite sill Serpentinized ultrabasic Serperrtinized ultrabasic Amphibolite-granite mntact Brecciated greywacke in serpentine Serpentin2ed ultrabasic...

Pyrite tracks assimilation of crustal sulfur in Pyrenean
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Pyrite occurs as vermicular intergrowths inside pentlandite and/or chalcopyrite or as coarser blocky grains in the intergranular pores of host peridotit Peridotite lithologies are markedly...

AlistosMexico
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The ore is believed to have originated from solutions which produced alteration in a peridotite stock The latter cuts surrounding flat-lying volcanics the chief one being an enstatite latite The mineralization responsible for the unusual group of minerals is interpreted as being hypogene Pentlandite Pentlandite is abundant in the gold...

Mineralogy and chemistry of Cu
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Mantle-derived peridotite bodies of Ariége are composed of spinel lherzolites and harzburgites ranging from remarkably fresh less than 5 serpentinized samples with protogranular texture to secondary foliated samples which are generally 10 20 serpentinized The foliated samples have passed through two cycles of deformation and re-crystallization the earlier ones occurring at...

Pentlandite Mineral information data and localiti
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Pentlandite Group Cobaltpentlandite-Pentlandite Seri Pentlandite is a rather pale brassy yellow metallic sulphide one of the most important nickel ores and a primary mineral in many ultramafic rocks...

PDF Sugakiite discovered as a new mineral species from
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Pentlandite and unknown sulfide mineral X occur as primary minerals in the peridotite Talnakhite and bornite are also found and has their ideal compositions View...

68 MINERAL ANALYSES FROM THE PERIDOTITE
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peridotite-olivine gabbro-gabbro in the plutonic com-plex of Site 334 A cycle usually begins with peridotite but in some cases the most basic member may be olivine gabbro Also a cycle usually ends with olivine-poor or olivine-free gabbro but in some cases the cycle ends while the gabbro is still relatively olivine rich This...

Minerals Free Full
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The sulfides occur enclosed in primary silicates interstitial in the peridotite matrix and associated with glass-bearing melt pockets Monosulfide solid solutions are enriched in these xenoliths relative to pentlandite and intermediate solid solutions...

Pentlandite Mineral Data
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Pentlandite Plumbopalladinite Valleriite Cubanite Comments Polished Section image PPL of plumbopalladinite Pl with polarite Po surrounded by a rim of isoferroplatinum Iso with cubanite Cu pentlandite Pe and valleriite Va...

PDF In Situ Chalcophile and Siderophile Element Behavior
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interstitial in the peridotite matrix and associated with glass-bearing melt pockets Monosulfide solid solutions are enriched in these xenoliths relative to pentlandite and intermediate solid...

Pyrite tracks assimilation of crustal sulfur in Pyrenean
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of the sulfide phase in some eastern Pyrenean peridotite massifs comparedtopiecesof subcontinental mantle studied so far for sulfid Pyrite occurs as vermicular intergrowths inside pentlandite and/or chalcopyrite or as coarser blocky grains in the intergranular pores of host peridotit Those different pyrites are characterized by...

THE GOMPOSITION OF NiSULFIDE ORES WITH PARTICULAR
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zone of massive pyrrhotite-pentlandite-pyrite-chalcopyrite ore occurs in sharp contact with the basaltic footwall and is overlain by net-textured ore overlain in turn by sulfides weakly dis-seminated in peridotite Other depoits associated with ultrqmafic rocks Pipe This deposit occurs in the Manitoba...

PDF Occurrence and Significance of Awaruite in the Dras
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Ni and Fe released from olivine and/or pyroxene must have produced awaruite after magnetite and pentlandite had been formed -RAH composed of peridotite and dunite overlain by a mafic zone...

Sulfur geochemistry of peridotite
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Thus cycling of sulfur in peridotite-hosted hydrothermal systems during the Jurassic was probably very similar to the processes observed today in systems along the Mid-Atlantic Ridge pentlandite millerite siegenite magnetite and hematite reflecting relatively oxidizing conditions while the sulfur geochemistry reveals a dominance of...

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