intrusion related vein magnetit depositssits

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  • Intrusion sequence, vein evolution and timing of ...

    magnetite±chalcopyrite veins, postdate all porphyry intrusions, and offset earlier biotite veins, EDM halos, and A-quartz veins. QAM veins and to a lesser extent B-type veins contribute the bulk of molybdenum mineralization in the deposit. Six Re-Os ages of molybdenite in different veins types range from 41.3 ± 0.2 Ma to 40.9 ± 0.2 Ma.

  • POLYMETALLIC VEIN AND REPLACEMENT DEPOSITS …

    Figure 1.Schematic vertical section through a polymetallic replacement deposit showing distribution of ore types and host rocks. Figure 2 cklin plot showing pH versus the sum of dissolved base metals Zn, Cu, Cd, Co, Ni, and Pb in mine and natural water draining

  • (PDF) From intrusion-related to orogenic mineralization ...

    From intrusion-related to orogenic gold mineralization, the Wasamac deposit, Abitibi, Canada By Nicolas Mériaud Archean high-Mg monzodiorite–syenite, epidote skarn, and biotite–sericite gold lodes in the Granny Smith–Wallaby district, Australia: U–Pb and Re–Os chronometry of two intrusion-related hydrothermal systems

  • Relationships between a Porphyry Cu-Mo Deposit, Base and ...

    progenitor intrusion but was not directly related to the exposed Ithaca Peak stocks. The evolution from hypersaline fluids in the anhydrite-chalcopyrite veins to low-salinity, lower temperature fluids in the quartz-pyrite veins suggests an influx of meteoric water …

  • Deposits related to clastic sedimentation

    Well-rounded, well-packed pebbles of vein-quartz, chert and pyrite. Matrix = quartz, mica, chlorite, pyrite and fuchsite. Granite clasts are absent. Pyrite may occur as rounded grains and concentrically layered concretions. Gold occurs as small angular grains (0.005 to 0.1 mm in diameter). Quartz pebble conglomerate Au-U

  • Intrusion-related Gold Pyrrhotite Veins

    Alldrick,D. J.(1996): Intrusion-related Au Pyrrhotite Veins, in Selected British Columbia Mineral Deposit Profiles, Volume 2 - Metallic Deposits, Lefebure, D.V. and Hõy, T, Editors, British Columbia Ministry of Employment and Investment, Open File 1996-13, pages 57-58.

  • CO Meeting Organizer EGU21

    The later are associated with significant feldspar concentrations, but also host apatite, garnet, and magnetite vein-type ores. Thereafter, field- and petrographic-based data were used as training data to perform a supervised classification allowing to refine the geological mapping of …

  • Minerals | Special Issue : Iron Oxide-Copper-gold (IOCG ...

     · Silician magnetite with high concentrations of SiO 2 (3.8–8.9 wt %) was similarly noted in intrusion-related magmatic–hydrothermal deposits including porphyry- and skarn-type deposits. This characteristic suggests that a hydrothermal system of relatively high-temperature and hypersaline fluids could be a substantial factor in the formation ...

  • 14 Mile Well Gold Project

    intrusion Ba/V, Au, Ag, Bi and Te soil anomalies indicating potential syenite association Field mapping identified magnetite alteration DGPR indicates several potential vein sets The magnetic signature is similar to those at the Wallaby and Cameron Well gold deposits

  • INTRUSION-RELATED GOLD DEPOSITS

    INTRUSION-RELATED GOLD DEPOSITS SE Europe Geoscience Foundation Shortcourse ... W-Sn-Mo Jiangxi S 66-76 Magnetite peraluminous magnetite, ilmenite, garnet, monazite, tourmaline, fluorite ... lack textures & wide structurally-controlled veins • HS – lack acidic fluids & related-alteration features; low Cu • Shallow IRG - High CO

  • INTRUSION RELATED GOLD DEPOSITS

    Home Resources Past Meetings INTRUSION RELATED GOLD DEPOSITS: CLASSIFICATION, CHARACTERISTICS AND EXPLORATION INTRUSION RELATED GOLD DEPOSITS: CLASSIFICATION, CHARACTERISTICS AND EXPLORATION Society of Economic Geologists Regional VP Lecturer 2003 Dr. T. Baker Economic Geology Research Unit, School of Earth Sciences, James …

  • ceT Quarterly News

    The interpretation of intrusion-hosted hydrothermal alteration is commonly equivocal because later syn-tectonic fracturing of brittle intrusive rocks can produce geometrically similar vein systems to those produced by intrusion-related phase separation (Perring et al., 1991; Witt, 1992a; cassidy et al., 1998). There are few, if any, studies in ...

  • Dias Geophysical : Dias Airborne | » Mineral Exploration

    Dias Geophysical successfully imaged alteration related to a known uranium deposit from 100 m depth to over 600 m depth. A similar conductive response 400 m south of the known deposit led to the discovery of the South Arrow uranium deposit. Situation. Canada''s Athabasca Basin hosts the vast majority of high-grade uranium deposits.

  • Ore deposits related to mafic igneous rocks hosted copper ...

    Mineralogy • Chalcopyrite (with minor cubanite) is the predominant Cu mineral in the core, especially in the transgressive carbonatite, containing ca. 1% Cu. • Bornite is dominant in the low grade banded carbonatite and foskorite (olivine, magnetite, apatite and phlogopite in variable proportions). • Magnetite (up 4 wt.% TiO 2) makes up 20-25% of the foskorite.

  • Mineralization associated with felsic plutonic rocks in ...

    Mineralization genetically related to a crystallizing felsic pluton is generally emplaced in its apical or marginal zones, or in satellite dikes, sills and stocks. In the Arabian Shield, as elsewhere, the style and nature of mineralization is primarily controlled by the composition and form of the host intrusion.

  • Cambrian intrusion-related copper mineralisation at the ...

    Cambrian intrusion-related copper mineralisation at the Thomas Creek prospect, Southwestern Tasmania Keywords The Thomas Creek Prospect lies at the southern end of the Sorell Peninsula, western Tasmania and consists of intrusions believed to be coeval with copper mineralisation within a dioritic intrusive complex.

  • Hydrothermal clinopyroxenes of the Skaergaard intrusion

    Early vein clinopyroxenes are blocky, anhedral crystals up to 0.5 mm in length and are intergrown with minute grains of magnetite, ilmenite and hornblende (Fig. 2b). All clinopyroxene-bearing early veins above the central por- tions of the Middle Zone are in close association with gran-

  • ORE DEPOSIT TYPES AND THEIR PRIMARY EXPRESSIONS …

    hydrothermal deposits show forms related to the geometry of the fluid channelways (e.g., veins or stockworks along fractures). Syngenetic deposits are commonly stratabound (i.e., confined to a particular stratigraphic layer or unit) or stratiform (i.e., confined to the stratigraphy and internally stratified or layered).

  • Gold Deposits in the Sanandaj–Sirjan Zone: Orogenic Gold ...

     · At the Muteh intrusion-related gold deposits (Moritz et al., 2006), mineralization predominantly occurs in large quartz veins, hosted in Paleozoic felsic schist and metarhyolite, subsidiary amphibolite and quartzite, and local marble and magnetite horizons (Thiele et al., 1968; Rashidnejad Omran, 2002). The Muteh goldfield is located in the ...

  • THE MURRAY GOLD DISTRICT, SHOSHONE COUNTY, IDAHO: …

    the Gem stocks have accessory magnetite and higher magnetic susceptibilities than their surroundings. Base metal veins near the Gem contacts contain abundant magnetite. Leach et al (1998) noted that these veins are deformed and suggested the vein magnetite formed by metamorphism of Proterozoic siderite-sphalerite veins.

  • Intrusion–Related Vein Gold Deposits: Types, Tectono ...

     · The currently popular assignment of most gold-rich veins to the orogenic category requires caution, because of the geological convergence that they show with some intrusion-related deposits. A proper distinction between intrusion-related and orogenic gold deposits is crucial for exploration planning.

  • Ore genesis

    High-grade gold ore from the Harvard Mine, Jamestown, California, a wide quartz-gold vein in California''s Mother Lode. Specimen is 3.2 cm (1.3 in) wide. Various theories of ore genesis explain how the various types of mineral deposits form within the Earth''s crust. Ore-genesis theories vary depending on the mineral or commodity examined.

  • Mineralogical and Geochemical Characterization of the ...

    Although intrusion-related systems have not been previously recognized in the European segment of the Tethyan Metallogenic Belt, the Rhodope metallogenic province of SE Balkan peninsula hosts numerous such occurrences. The Kimmeria hydrothermal system incorporates two styles of ore mineralization: i) a massive Au-bearing magnetite-pyrrhotite skarn and ii) a Mo-Cu-Bi-W quartz vein …

  • Contrasting Styles of Intrusion-Associated Hydrothermal ...

    Intrusion-related hydrothermal systems represent a large variety of geologic environments that in some cases form large metallic mineral deposits. The deposits examined in this trip represent the spectrum from systems ... significance Zn-Pb-Ag-Au veins (6 Mt Cu); large magnetite resource (>200 Mt) Mt), small Cu prospects, local Ni-Co-Ag-As-U veins

  • Magnetic felsic intrusions associated with Canadian ...

    Magnetite-series and ilmenite-series granitoids are recognized in Phanerozoic orogenic terrains (Ishihara, 1977, 198 1). The magnetite-series in- trusions are characterized by the occurrence of magnetite, generally in a range between 0.1 and 2 vol%, and they display magnetic anomalies. The ilmenite-series plutons contain less oxides,

  • Descriptive model of Sn skarn

    DESCRIPTIVE MODEL OF Sn SKARN DEPOSITS. MODEL 14b. By Bruce L. Reed and Dennis P. Cox. DESCRIPTION Tin, tungsten, beryllium minerals in skarns, veins, stockworks and greisens near granite-limestone contacts (see fig. 34).. Figure 34. Cartoon cross section showing between Sn skarn, replacement Sn and Sn vein deposits, and granite intrusions.

  • Geology, mineralization, and fluid inclusion ...

     · Together with the relation to a magnetite-series high-K calc–alkaline to shoshonitic igneous suite and the presence of oxidized W–Cu–Mo skarns, with local strong enrichment in Fe oxides including hematite, this distinguishes the Au–W quartz–carbonate–sulfide veins at Kumbel from those typical of reduced intrusion-related Au deposits.

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    Crusher Machine For Sale in Philippines . Crusher Machine For Sale in the Philippines Crusher machine for sale is the mechanical equipment used to crush minerals Generally, a crushing machine can crush different materials, such as river pebbles, granite, limestone, basalt, ore, rock, stone, gypsum, coal, etcAccording to the feed particle size and discharge size, the process of crushing ...

  • (PDF) Iron oxide-copper-gold deposits: an Andean view ...

    Mineralium Deposita (2003) 38: 787–812 DOI 10.1007/s00126-003-0379-7 A RT I C L E Richard H. Sillitoe Iron oxide-copper-gold deposits: an Andean view Received: 3 March 2003 / Accepted: 22 July 2003 / Published online: 17 September 2003 Ó Springer-Verlag 2003 Abstract Iron oxide-copper-gold (IOCG) deposits, de- ising the close connection with ...

  • Intrusion-related affinity and orogenic gold overprint at ...

     · The Bonikro gold deposit and satellite Hiré open pits are located at the southern tip of the Oumé-Féttékro granite–greenstone belt in Côte d''Ivoire. Country rocks in the region have undergone polyphase deformation and prolonged arc magmatism during the Paleoproterozoic Eburnean orogeny. Intrusive host rocks at Hiré and Bonikro have been dated at 2180 ± 6 and 2086 ± 4 Ma (U–Pb on ...

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     · This is a weak intrusion‐related hydrothermal alteration and includes some epidote. It hosts elevated copper‐gold mineralisation in the deep drill hole WG002 and the barren sheeted laminated quartz‐magnetite veins in WDD019 and WDD020. Inner propylitic alteration ...

  • An intrusion-related gold deposit (IRGD) in the NW of ...

     · Highlights Linares is a gold deposit hosted by post-collisional mixed I and S-types granites. They are high-K calc-alkaline, peraluminous and moderately oxidised to reduced. The ore is related to microfractures and veins, commonly in sheeted vein array. Magmatic ± metamorphic, aqueous-carbonic (CO2 ± CH4 > N2 > H2S) ore fluids of low salinity. Linares is an intrusion-related …

  • The Association of Gold and Magnetite

     · One common type of gold deposit is one where the gold is associated with the mineral magnetite where the gold is formed in skarns of granular magnetite. The mineral has a chemical formula Fe 3 O 4 that is often found in contact metamorphosed areas associated with intrusions of magma into carbonate or silico-carbonate rocks the intrusion itself is usually granite or monzonite …

  • Anatomy of Porphyry-Related Mineralised Au-Cu-Ag-Mo …

    intrusion. Barren high temperature ptygmatic and disjointed A style quartz veins developed while the intrusion is cooling may be overprinted by stock work and linear sheeted Au veins which vary to locally wormy A style quartz-sulphide, or stock work and sheeted M style quartz-magnetite-sulphide veins. These veins and lesser

  • Advanced Spaceborne Thermal Emission and Reflection ...

    related magma. Three main mineralized zones were identified in the area. The NW part of the deposit (No. 1), which is associated with three major sub-parallel quartz veins, the SE portion (No. 3) and the central part (the main vein set- No. 2). Quartz is the most common constituent in all of the

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