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Massive Sulfide - an overview ScienceDirect Topics

03.03.2012  The massive sulfide bodies may be located within felsic basement gneiss up to 30 m below the basal contact of the intrusion, or within the intrusion, up to 20 m above the basal contact (Figs. 3.3.5 and 3.3.9). They range in size from about 1 million tons to more than 10 million tons.

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7. Geophysical Characteristics of Volcanogenic Massive ...

massive sulfide ore body and may be associated with clays, which also produce significant IP responses (Ford and others, 2007). The techniques associated with electromagnetic (EM) surveys, collected both on ground and in air, are the most common electrical methods employed in

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Massive sulfide ores of the northern equatorial

26.10.2013  The application of these methods made it possible to discover six massive sulfide deposits and considerably extend the boundaries of another two ore objects. The ores associated with ultramafic rocks are characterized by elevated Cu, Au, and Co concentrations.

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The Cu Stockwork and Massive Sulfide Ore of the

The Variscan Feitais volcanic-hosted massive sulfide deposit in the Aljustrel district of the Iberian Pyrite Belt consists of 55 million metric tons of Zn-Pb-Cu massive sulfide overlying a Cu-rich stockwork. The massive ore is overlain by up to 30 m of feldspar-phyric, rhyolitic volcaniclastic rock and locally by a jasper and/or chert layer up to 15 m thick. The massive sulfide orebody ...

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The Characteristics of the Seafloor Massive Sulfide ...

08.11.2014  Sulfide ores in bottom of Unit4 (454–510 cmbsf) were also massive, and large euhedral cystals of barite were observed to be different from barite crystals in Unit 2 (18–166 cmbsf) (Fig. 43.2k). From these peterologic characteristics, five units were assigned and shown in Fig. 43.1c.

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Vulkanogene massive Sulfiderzlagerstätte - Volcanogenic ...

Vulkanogene massive Sulfiderzlagerstätte - Volcanogenic massive sulfide ore deposit Aus Wikipedia, der freien Enzyklopädie Die vulkanogene massive Sulfiderzlagerstätte in der Kidd Mine , Timmins, Ontario , Kanada, entstand vor 2,7 Milliarden Jahren auf einem alten Meeresboden

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High Grade Ore From Massive Sulfide Pod! -

25.11.2019  We removed 10KG of samples from a massive sulfide vein and massive sulfide pod containing gold, silver, copper. Mineralized quartz carbonate vein and pod hos...

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Sulfide-silicate textures in magmatic Ni-Cu-PGE

01.10.2018  Typically, the assemblage of ore types in sulfide-rich deposits contains a component of massive or semi-massive ores, characterised by the presence of modal sulfide proportions between about 50 and 100% on sample length scales of tens of centimetres to tens of metres ( Naldrett, 2004 ).

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Gisement de minerai sulfuré massif volcanogène ...

Les gisements de minerai de sulfures massifs volcanogènes, également connus sous le nom de gisements de minerai de VMS, sont un type de gisement de minerai de sulfures métalliques, principalement de cuivre - zinc qui sont associés et créés par des événements hydrothermaux d' origine volcanique dans des environnements sous-marins.

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Massive sulfide ores of the northern equatorial

The application of these methods made it possible to discover six massive sulfide deposits and considerably extend the boundaries of another two ore objects. The ores associated with ultramafic rocks are characterized by elevated Cu, Au, and Co concentrations. It is established that the ore

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Minerals Special Issue : Massive Sulfide

Massive sulfide deposits are commonly classified in two large categories, attending to the dominant processes during ore generation: Volcanogenic massive sulfide deposits (VMS) and sediment-hosted massive sulfide deposits (SHMS). The boundary between both groups is, nevertheless, diffuse. The literature on massive sulfide deposits is immense, particularly, since the discovery (in 1979) of ...

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The Cu Stockwork and Massive Sulfide Ore of

The Variscan Feitais volcanic-hosted massive sulfide deposit in the Aljustrel district of the Iberian Pyrite Belt consists of 55 million metric tons of Zn-Pb-Cu massive sulfide overlying a Cu-rich stockwork. The massive ore is overlain by up to 30 m of feldspar-phyric, rhyolitic volcaniclastic rock and locally by a jasper and/or chert layer up to 15 m thick. The massive sulfide orebody ...

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Silicate-replacive high sulfidation massive sulfide ...

11.12.2020  The true massive sulfide sample shows a net volume reduction of 12% and is more representative for the overall process of massive sulfide replacement, as this ore type is prevalent in the T orebody, as well as in historic samples from Tilva Ros. These observations suggest that the massive sulfide orebody did not form by precipitation into extra space (e.g., opening of large extensional jogs ...

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Minerals Free Full-Text Massive Sulfide Ores in

Less attention has been paid to the ore mineralogy forming the massive sulfide deposits and its textural evolution. Nevertheless, there are a number of case studies documenting the mineralogy of single deposits [18,22,26,34,35,36,37].The main ore mineralogy reported for the IPB deposits is pyrite, with subordinate sphalerite, galena, chalcopyrite, tetrahedrite–tennantite, arsenopyrite ...

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MAGMATIC SULFIDE DEPOSITS (MODELS 1, 2b, 5a, 5b, 6a, 6b ...

PGE sulfide near base of com­ massive ore tire area of intrusion; and meta­ plex, subvolcanic, elon- Massive sulfide orebodies sedimentary gate intrusions less than as much as 45 m thick and 350 m thick 2.5 km2 in area Komati­ 6a Mostly massive, lesser Mostly massive, Fe>Ni Generally deposits less Ultramafic itic Ni­ disseminated, sulfide minor dissemi­ than 2 million tons; me-Cu deposits ...

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Sulfide-silicate textures in magmatic Ni-Cu-PGE sulfide ...

1 Sulfide-silicate textures in magmatic Ni-Cu-PGE sulfide ore 2 deposits. 1. Disseminated and net-textured ores. 3 (Revision 1) 4 ... 73 intergrowths in massive ores, semi-massive breccia ores and other variants of sulfide-74 dominated ores will be described in a forthcoming companion paper. 75 Our main purpose in the study of textures is to make deductions about ore-forming processes 76 ...

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Gisement de minerai sulfuré massif volcanogène ...

Gisement de sulfures massifs volcanogènes - Volcanogenic massive sulfide ore deposit. Un article de Wikipédia, l'encyclopédie libre . Gisement de sulfure massif volcanogène à Kidd Mine , Timmins, Ontario , Canada, formé il y a 2,7 milliards d'années sur un ancien fond marin . Une coupe transversale d'un gisement de minerai de sulfures massifs volcanogènes (SMV) typique, comme on le ...

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Deposito di minerale solfuro massiccio

Deposito di minerale solfuro massiccio vulcanogenico - Volcanogenic massive sulfide ore deposit. Da Wikipedia, l'enciclopedia libera . Il massiccio deposito di minerale di solfuro vulcanico nella miniera di Kidd , Timmins, Ontario , Canada, formatosi 2,7 miliardi di anni fa su un antico fondale marino . Una sezione trasversale di un tipico deposito di minerale di solfuro massiccio vulcanico ...

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Minerals Special Issue : Massive Sulfide

Massive sulfide deposits are commonly classified in two large categories, attending to the dominant processes during ore generation: Volcanogenic massive sulfide deposits (VMS) and sediment-hosted massive sulfide deposits (SHMS). The boundary between both groups is, nevertheless, diffuse.

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The Cu Stockwork and Massive Sulfide Ore of

The massive sulfide orebody consists dominantly of pyrite, sphalerite, galena, chalcopyrite, tetrahedrite-tennantite, arsenopyrite, and bournonite, together with minor quartz, chlorite, sericite, carbonate, and barite. The orebody is up to 100 m thick and is underlain by a tabular alteration zone of chlorite-dominated, locally silicified, felsic volcanic rock, the upper 30 to 60 m of which contains chalcopyrite

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Geology and mineralogy of massive sulfide ores

Strong similarities, both geochemically and mineralogically, are found between these ore samples and kuroko-type massive sulfide ores. However, the formation of the Jade deposit is as yet incomplete and at an immature stage. This presents the unique opportunity to examine a modern analogue of an ancient deposit. AB - Massive sulfide ores were collected from active and inactive vents and ...

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THE MASSIVE SULFIDE OCCURRENCES IN WISCONSIN

Location of known massive sulfide ore bodies in the Middle Pr'ecambrian of norther'n Wisconsin and relations to the inferred metavolcanic belt. banded iron formation. Independent of the type of mineralization, however, is the observation that all metavolcanic belts can be subdivided into sequences of tholeiitic and calc--alkaline affinity typically with the calc-alkaline association occupying ...

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MINERALOGY OF SULFOSALT-RICH VEIN-TYPE ORES, BOLIDEN ...

Au–Cu–As massive sulfide deposit, in the Skellefte district, in northern Sweden, have been investigated by a combination of ore microscopy, electron-microprobe analysis and balanced reactions. The sample material contains a variety of ore minerals, includ - ing Au–Ag alloy, gudmundite, selenian galena, kobellite, tetrahedrite, bournonite and laitakarite. The vein ores display struct ures ...

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Setting, sulfur isotope variations, and

Massive ore lenses are usually underlain by deformed Cu‐pyrite and quartz‐pyrite stockworks. Most of the sulfide ore bodies have proximal‐type features. Ductile deformation and regional metamorphism have transformed many of the stockwork structures. The mineralization is characterized by high Zn, Pb, and Ag contents, while Cu and critical metals are low. Primary depositional textures ...

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Sulfide-silicate textures in magmatic Ni-Cu-PGE sulfide ...

116 broadly trimodal distribution between massive ores typically containing 80-100% sulfide, 117 ores with up to about five modal percent sulfides, called “disseminated ores”, and ores 118 containing about 30 to 70 modal percent sulfide forming continuous networks enclosing

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Gisement de minerai sulfuré massif volcanogène ...

Gisement de sulfures massifs volcanogènes -. Volcanogenic massive sulfide ore deposit. Les gisements de minerai de sulfures massifs volcanogènes , également connus sous le nom de gisements de minerai de VMS, sont un type de gisement de minerai de sulfures métalliques , principalement de cuivre - zinc qui sont associés et créés par des événements ...

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Deposito di minerale solfuro massiccio

Volcanogenic massive sulfide ore deposit. I depositi di minerale di solfuro massiccio vulcanogenico , noti anche come depositi di minerale di solfuro di metallo , sono un tipo di deposito di minerale di solfuro di metallo , principalmente rame - zinco che sono associati e creati da eventi idrotermali associati a origine vulcanica in ambienti ...

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Geology and mineralogy of massive sulfide ores

Massive sulfide ores were collected from active and inactive vents and smokers and from mounds of the hydrothermal Jade field in the central Okinawa trough (Japan), which is a tectonically active intracontinental back-arc basin located in the northwestern Pacific. The Jade field occurs at a site where the tip of a marine graben segment is thought to be influenced by an obliquely striking shear zone.

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THE MASSIVE SULFIDE OCCURRENCES IN WISCONSIN

250°C chosen to represent hydrothermal Ore fluids that may be associated with massive sulfide formation. Except for the lowest total sulfur concentration, an increase in oxygen fugacity results in the loci of ore solutions migrating from pyrrhotite-magnetite stability fields to pyrite or hematite stability fields. Neither pyrite nor hematite have appreciable magnetic susceptibility

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Volcanogenic massive sulfide ore deposit and

Volcanogenic massive sulfide ore deposit. Volcanogenic massive sulfide ore deposits, also known as VMS ore deposits, are a type of metal sulfide ore deposit, mainly copper-zinc which are associated with and created by volcanic-associated hydrothermal events in submarine environments. Wikipedia.

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The Cu Stockwork and Massive Sulfide Ore of the Feitais ...

The massive sulfide orebody consists dominantly of pyrite, sphalerite, galena, chalcopyrite, tetrahedrite-tennantite, arsenopyrite, and bournonite, together with minor quartz, chlorite, sericite, carbonate,

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Massive sulfide Cu-Zn ore from Pyhäsalmi Mine,

Massive sulfide Cu-Zn ore from Pyhäsalmi Mine, Oulu Province, Finland Input Input (optical microscopy) 100 µm 0,5 mm 70 µm Output after one pass comminution (SEM image) Output after one pass comminution (SEM image) Summary (after one pass comminution): • Sulfide ore minerals are almost completely liberated.

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Pyhäsalmi Volcanogenic Massive Sulfide Deposit, Central ...

Massive sulfide deposits consist of >60% of sulfides. VMS deposits form at or just below the sea floor in any relatively deep submarine environments from seawater derived hydrothermal fluids that are driven by convective circulation above a deep heat source, which is most commonly a magma chamber (Hannington, 2014). Most often submarine massive sulfide ore precipitates on top of volcanic ...

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MINERALOGY OF SULFOSALT-RICH VEIN-TYPE ORES, BOLIDEN ...

infiltrations and replacements. The massive sulfide ores at Boliden occur as an elongate set of lenses, obliquely cutting the host rocks in a structure approximately ori-ented east–west with a roughly vertical dip. The orien-tation of the ore zones has been related to a local shear zone (Bergman Weihed et al. 1996) responsible for the

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Setting, sulfur isotope variations, and

Massive ore lenses are usually underlain by deformed Cu‐pyrite and quartz‐pyrite stockworks. Most of the sulfide ore bodies have proximal‐type features. Ductile deformation and regional metamorphism have transformed many of the stockwork structures. The mineralization is characterized by high Zn, Pb, and Ag contents, while Cu and critical metals are low. Primary depositional textures, for example, layering,

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Massive sulfide Zn deposits in the Proterozoic

06.03.2020  Massive sulfide Zn deposits in the Proterozoic did not require euxinia. J.M. Magnall 1, 1 GFZ German Research Centre for Geosciences, 14473 Potsdam, Germany S.A. Gleeson 1,2, 1 GFZ German Research Centre for Geosciences, 14473 Potsdam, Germany 2 Institute of Geological Sciences, Freie Universität, 74-100 Malteserstrasse, 12249 Berlin, Germany N. Hayward 3, 3 Teck Australia Pty

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Significant Known Metallic Mineral Deposits in Maine

*Second Pond (or Blue Hill Mine) - 1 MT of massive sulfide ore mined in 1972-1977, averaging 6.9% zinc and 0.9% copper with minor lead and silver. Reserves of about 1.4 MT at 8% zinc remain at depth. (Blue Hill, Hancock Co.) Warren - 2.6 MT massive sulfide, grading 1.5% nickel, 0.7% copper, 0.1% cobalt. A

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