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They are nestled in the Chilean iron belt, between the largest iron ore mines in Chile: Cerro Negro and Los Colorados, owned by Compañía Minera del Pacífico ("CMP"). ... Admiralty's Harper South project is …
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Abstract The Pliocene El Laco deposits of magnetite-apatite iron ore of the Kiruna type, situated on the flanks of a volcano in northern Chile, can morphologically and structurally be described as extrusive and intrusive magmatic orebodies with hydrothermal over. Fluid inclusions in pyroxene and apatite record different stages in the …
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Description and properties of common iron ore minerals. Iron ore minerals are rocks or minerals that contain iron in concentrations high enough to be economically extracted. Common iron ore minerals include: Hematite (Fe2O3): Hematite is the most abundant and important iron ore mineral. It is typically steel-gray to black in color and …
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Microscopy and rock-magnetic properties appear as appropriate tools for investigating Chilean iron-ore deposits. If the ores were initially lava flows of …
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Magnetite-(apatite) ore deposits are interpreted as being formed by the crystallization of iron-rich ultrabasic melts, dominantly generated by the interaction of silicate melts with oxidized P-F ...
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Abstract. The textures of outcrop and near-surface exposures of the massive magnetite orebodies (>90 vol % magnetite) at the Plio-Pleistocene El Laco iron oxide …
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A review of magnetite geochemistry of Chilean iron oxide-apatite (IOA) deposits and its implications for ore-forming processes ... Magnetite is the most important iron ore in iron oxide-apatite (IOA) deposits which represent the Cu-poor end- member of the iron oxide-copper–gold (IOCG) clan. Magnetite chemistry has been used as a …
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The El Romeral IOA deposit is located at the southern end of the Chilean Iron Belt, between latitudes 29°44′S and 29°42′S (Fig. 1).Resources have been estimated at about 450 Mt with a 28.3% iron grade (CAP Minería 2014 Annual Report) and up to 1.1% vanadium (Dobbs, 1978).Mineralization is hosted by the late Jurassic to Neocomian La …
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deposit in Chile that supports the model of Knipping et al. (2015a,b), pointing to a combination of efficient magmatic and hydrothermal processes of Fe concentration. The …
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What is iron ore? Iron ores are rocks and minerals from which metallic iron can be extracted. There are four main types of iron ore deposit: massive hematite, which is the most commonly mined, magnetite, titanomagnetite, and pisolitic ironstone. These ores vary in colour from dark grey, through to deep purple, rusty red and bright yellow.
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Iron oxide–apatite (IOA or Kiruna-type) deposits typically consist of a magnetite-apatite-actinolite/diopside assemblage and are spatially associated with extensive Na-(Ca) alteration and brecciation. The origin of these deposits is highly controversial and has been ascribed to the separation of iron-oxide/sulfate-(carbonate) …
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1.Introduction. Iron oxide copper-gold (IOCG) deposits proposed initially by Hitzman et al. (1992) are a new group of hydrothermal Fe-Cu deposits enriched in Fe, Cu, Au, U and REE. The research of IOCG deposits gained impetus following the exploration and subsequent identification of the Olympic Dam Cu-U-Au deposit in Australia in 1975.
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DOI: 10.1016/j.oregeorev.2020.103748 Corpus ID: 224948064; A review of magnetite geochemistry of Chilean iron oxide-apatite (IOA) deposits and its implications for ore-forming processes
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New contributions to the understanding of Kiruna-type iron oxide–apatite deposits revealed by magnetite ore and gangue mineral geochemistry at the El Romeral deposit, Chile. Ore Geol. Rev. 93 ...
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The El Laco magnetite deposit has been interpreted as lava flows and feeder dikes formed from iron oxide magma, but more recently, as a product of metasomatic replacement.
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Magnetite is a mixed iron(II)/iron(III) oxide and its magnetism, hardness, density and catalytic properties combine to generate its importance.Massive deposits of magnetite were formed around 2 ...
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Section snippets Geological background. About 50 Kiruna-type IOA deposits, including seven large deposits (>100 Mt high grade Fe-ore each), occur in the Chilean Iron Belt (CIB) within the Coastal Cordillera of northern Chile between latitudes 25° and 31° S (Nyström and Henríquez, 1994) (Fig. 1).The CIB was formed during the …
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The geochemistry of apatite from the Los Colorados iron oxide–apatite deposit, Chile: implications for ore genesis. Apatite grains from the Los Colorados iron oxide–apatite …
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Magnetite is the main constituent of iron oxide-apatite (IOA) ore deposits, commonly referred to as Kirunatype deposits, which can host hundreds of millions to …
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The results show that the high-Ti magnetite in the IOA deposits has chemical compositions similar to those of high-temperature hydrothermal deposits, including the iron oxide copper-gold and porphyry deposits, but significantly distinct from the igneous magnetite. High-titanium (high-Ti, more than 1 wt % Ti) magnetite, …
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Iron oxide-apatite (IOA) deposits are important sources of iron. The role of evaporite layers in the formation of IOA ore deposits remains controversial. The Luohe deposit in eastern China and the El …
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A major mining site in Michigan is the Marquette Range, which hosts four types of iron ore deposits, including both magnetite and hematite ore. In Minnesota, magnetite ore is mined mainly in the ...
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Pa ge 2/ 17 Abstract Magnetite is the main constituent of iron oxide–apatite (IOA) deposits, which are a globally important source of Fe and other elements such as P and REE, critical for modern ...
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Apatite grains from the Los Colorados iron oxide–apatite (IOA) deposit, the largest IOA deposit in the Chilean Iron Belt (CIB), exhibit significant intracrystalline …
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Major deposits in the Chilean iron belt and Kiruna contain ... Keywords: Oxygen isotope, magnetite, iron ore, El Laco, Kiruna, Chile, Sweden. 1 Swedish Museum of Natural History, Box 50007, ...
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Kiruna-type iron oxide–apatite (IOA) deposits, an important global resource of iron and potentially rare earth elements (REEs) and phosphorus, consist of massive, disseminated, brecciated, and/or vein-type magnetite + apatite + diopside and/or actinolite ores (1–6).It has long been recognized that IOA deposits are spatially and temporally …
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Magnetite geochemistry is crucial for the discrimination of ore deposit genetic type. Traditional two-dimensional discrimination diagrams based on particular data for limited deposits cannot meet the requirements of high-precision classification. The continuous compilation of magnetite geochemical big data and high-precision machine …
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An executable program of the classifiers used to train different machine learning (ML) classifiers, including random forest, support vector machine, and multilayer perceptron neural network, to predict the genetic type of ore deposits meets the requirements for ore deposit-type classification. Expand
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A few iron ore deposits, notably in Chile, are formed from volcanic flows containing significant accumulations of magnetite phenocrysts. [10] Chilean magnetite iron ore deposits within the Atacama Desert have also formed alluvial accumulations of magnetite in streams leading from these volcanic formations.
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Magnetite is the most important iron ore in iron oxide-apatite (IOA) deposits which represent the Cu-poor end-member of the iron oxide-copper-gold (IOCG) clan. Magnetite chemistry has been used as a petrogenetic indicator to identify the geological environment of ore formation and as a fingerprint of the source reservoir of iron. In this study, we …
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