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The magnetite mineralization mainly occurs as massive iron ores, partly with columnar-network or flow textures, and as disseminated magnetite ores. Trace element and isotope investigations of the different ore types reveal two major groups of magnetite: Group I, represented by the massive, partly brecciated ores from both …
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Textural and compositional data of magnetite from Igarapé Bahia, Alemao, Sossego, Salobo, and Candelaria iron oxide copper-gold (IOCG) and El Romeral Kiruna-type iron oxide-apatite (IOA) deposits show that some magnetite grains display oscillatory zoning or have been reequilibrated by oxy-exsolution, coupled dissolution and …
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Dissolution–reprecipitation process of magnetite from the Chengchao iron deposit: Insights into ore genesis and implication for in-situ chemical analysis of magnetite. Ore Geol. Rev. 57, 393 ...
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Type II is a network ore composed of magnetite and crosscutting pyrite. Type III is a massive ore containing calcite and hematite. Type I magnetite is characterized by highly variable trace element content, whereas Type II magnetite has consistently higher Si, Ti, V, and Nb. Type III magnetite contains more In, Sn, and As than the other …
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Magnetite is rock mineral and one of the most important iron ore minerals with chemical formula is iron(II,III) oxide, Fe2+Fe3+2O4 .It also as the name magnetic minerals to attracted to a magnet. It is the most magnetic natural occuring minerals in the World. Small grains of magnetite occur in almost all igneous and metamorphic rocks.. …
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Trace element and isotope investigations of the different ore types reveal two major groups of magnetite: Group I, represented by the massive, partly brecciated ores from both deposits, is ...
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At least 100 magnetite grains were randomly selected from the magnetic fraction of each till sample. Nineteen trace elements in ~50 magnetite grains in each sample were measured by laser ablation-inductively coupled plasmamass spectrometry (LA …
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Trace element compositions of magnetite of alkaline mafic–ultramafic rocks were not previously studied but are potentially useful to constrain their petrogenesis and related metallogenesis. In the Permian Emeishan large igneous province, subalkaline mafic–ultramafic intrusions are widely distributed, but sparse alkaline counterparts are …
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The mineralogical and geochemical characters of the vanadiferous titano-magnetite and associated copper ore are described for the first time in this paper. ... Vanadiilm is the dominant minor element in the magnetite-gabbro and magnetite bands; it ranges fron 0.23 - 0.93%. Optical studies have not disclosed the 3+ presence of any …
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The Xinqiao Cu-Fe-Au deposit in the Tongling ore district is a typical stratabound ore body characterized by multi-stage magnetite. A total of six generations …
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2.1. Island Copper. Island Copper is a Cu–Mo–Au deposit hosted in a Jurassic (165 Ma) calc-alkaline monzonite stock and rhyodacite dykes that intrude Bonanza Group volcanic rocks of the Wrangellia Terrane (Perelló et al., 1995, Friedman and Nixon, 1995).Skarn and vein-style mineralization is locally prominent. Most ore at Island …
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The Paleoproterozoic Great Bear magmatic zone is the focus of ongoing exploration for iron oxide copper-gold (IOCG) deposits and also hosts iron ... important geochemical differences in V, Ni, Cr, and Co concentrations within the magnetite. Variations of trace elements in magnetite from ... the Cr/Co ratio is higher in barren and …
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The subtle variations of trace element concentrations within a magnetite grain and between the magnetite grains in the same sample probably indicate local inhomogeneity of ore–forming fluids. The variations of Co in magnetite between samples are probably due to the mineral proportion of magnetite and pyrite.
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Magnetite occurs as an ore mineral in many types of deposits and its trace element characteristics can be used to fingerprint various types of mineral deposits and …
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Huang, X. & Beaudoin, G. Textures and chemical compositions of magnetite from iron oxide copper-gold (IOCG) and Kiruna-type iron oxide–apatite (IOA) deposits and their implications for ore ...
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Olympic Dam-type iron-oxide copper–gold deposits are widely recognised in terrains with significant Palaeoproterozoic to Mesoproterozoic granitic magmatism. Most researchers favour a magmatic association for these deposits, but none of the 100–2000 Mt recognised copper-bearing deposits has a spatial and/or temporal relationship to an intrusive body …
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The Bipindi iron ore district is located in the central section of the Nyong Complex at the northwestern margin of the Congo Craton in Southwest Cameroon. This iron district contains numerous iron mineralization hosted by the Mewongo, Bibole, Kouambo, and Zambi banded iron formations (BIFs). These BIFs contain magnetite as the main …
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chief driver in the high interest in magnetite as an ore deposit discriminator and proximity indicator (Grigsby 1990; Dare et al. 2012, 2014; Nadoll et al. 2014). Magnetite is a stable phase at a range of temperatures and pressures and is a common gangue mineral in many styles of ore deposits, as well as in igneous, metamorphic, metasomatic
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A continuum from iron oxide copper-gold to iron oxide–apatite deposits: Evidence from Fe and O stable isotopes and trace element chemistry of magnetite. …
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Huang, X. W. & Beaudoin, G. Textures and chemical compositions of magnetite from iron oxide copper-gold (IOCG) and Kiruna-type iron oxide-apatite (IOA) deposits and their implications for ore ...
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Chalcopyrite is a mineral and ore of copper. Its chemical composition is CuFeS2, meaning it contains copper (Cu), iron (Fe), and sulfur (S). Chalcopyrite is one of the most important copper ores and …
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oxide copper gold (IOCG) and rare earth element (REE) deposits, it is commonly observed that early magnetite is replaced by hematite in the main ore-forming stage 6–9, and …
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In some important deposit classes, including iron oxide copper gold (IOCG) and rare earth element (REE) deposits, it is commonly observed that early magnetite is replaced by hematite in the main ...
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The magnetite ore body at the El Romeral comprises an aggregate of massive magnetite (>95% modal) with actinolite found mainly at the margins of the ore body. ... Regional geologic and petrologic framework for iron oxide ±apatite ±rare earth element and iron oxide copper-gold deposits of the Mesoproterozoic St. Francois …
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A selection of LA-ICPMS magnetite trace element maps sampled from high-grade TATD003 and TATD030 depicts the partial recrystallisation of some magnetite in …
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We have characterized the distribution of 25 trace elements in magnetite (Mg, Al, Si, P, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Sn, Hf, Ta, …
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The majority of the copper deposits in the western Awulale belt are hosted in Permian sedimentary strata and late mafic and felsic dikes (Zhao et al., 2018, Liu and …
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Introduction. Copper slag flotation tailing (CSFT) is a by-product of Cu pyro-metallurgical production, which accounts for more than 80 % of all Cu products produced worldwide [1].During Cu extraction, molten Cu slag is generated, which consists of a matrix of iron silicates (Fe 2 SiO 4), metal oxides, and matte droplets [1].Copper is usually …
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The origin of magnetite-(apatite) iron deposits (MtAp) is one of the most contentious issues in ore geology with competing models that range from hydrothermal to magmatic processes. Here we report ...
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Magnetite from andesite at El Laco, and dacite from the nearby Láscar volcano, has high trace element concentrations typical of magmatic magnetite. El Laco ore magnetite have low trace element ...
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