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magmatic magnetite ore

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Magnetite chemistry and implications for the magmatic

20-09-2019  Magnetite in the Devonian Yuleken porphyry Cu–Mo deposit located in NW China witnessed complicated magmatic-hydrothermal ore-forming processes. The magnetite grains can be divided into Mag I-A (from the Beitashan Formation basalt), Mag I-B (from the porphyritic syenite wall rock), Mag II (from sodic-calcic alteration zone), Mag III-A (from early potassic stage with no concomitant sulfides) and Mag

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Magmatic Ore Deposits Sede Medellin

Magmatic Ore Deposits Magmatic ore deposits are those which are formed during crystallization of a magma, deep underground. The host rock for the mineralization can range from ultramafic to felsic. The deposit can consist of massive ores in some cases, a nd disseminations of rare minerals in others.

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Magmatic origin of giant ‘Kiruna-type’ apatite-iron-oxide

10-04-2013  The main GMD ore field, locally known as the ‘Export Field’, is estimated to consist of about 80% magnetite and 20% hematite ore, with a concentration of the latter near the structural footwall.

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Discriminate between magmatic-and magmatic

28-02-2021  The primary observation of this study is that magnetite samples from high grade ores of magmatic origin IOA deposits has a heavier Fe isotopic signature relative to

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Magmatic Ore Deposits Sede Medellin

Magmatic Ore Deposits Magmatic ore deposits are those which are formed during crystallization of a magma, deep underground. The host rock for the mineralization can range from ultramafic to felsic. The deposit can consist of massive ores in some cases, a nd disseminations of rare minerals in others.

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Formation of massive iron deposits linked to explosive

05-10-2018  The world-class El Laco iron deposit in the ELVC consists of six massive magnetite ore bodies that are spatially associated with the pre-existing subvertical annular collapse structures and...

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Discriminate between magmatic-and magmatic

28-02-2021  The primary observation of this study is that magnetite samples from high grade ores of magmatic origin IOA deposits has a heavier Fe isotopic signature relative to

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Magmatic iron ores Naturhistoriska riksmuseet

The volcanic textures and structures of the ore, rather than reflecting a magmatic origin, are believed by hydrothermalists to be relict features of original volcanic rocks replaced by magnetite. The purpose of this project is to present additional evidence for a magmatic origin of magnetite-apatite ores.

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Magnetite Wikipedia

Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe 3 O 4. It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. It is the most magnetic of all the naturally occurring minerals on Earth.

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Iron ore, Magmatic magnetite ore, Hematite ore,

03-01-2011  Magmatic magnetite ore depositsOccasionally granite and ultrapotassic igneous rocks segregate magnetite crystals and form masses of magnetite suitable for economic concentration. A few iron ore deposits, notably in Chile, are formed from volcanic flows containing significant accumulations of magnetite phenocrysts.

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Minerals Free Full-Text Magnetite Geochemistry of the

Type I magnetite is subhedral to anhedral from massive Ni- (or Fe-) and Cu-rich sulfide ores, with apparent magmatic origin, whereas Type II (dendritic or laminar crystals) and III magnetite (granular crystals as disseminated structures) from disseminated Cu-rich sulfide ores may have precipitated from late stage of melts evolved from a primitive Fe-rich and sulfide-bearing system with magmatic origin,

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Mineral chemistry of magnetite from magnetite-apatite

Magnetite samples from Kiruna have low trace element concentrations with little chemical variation between the ore, host, and related intrusive rocks. Magnetite from andesite at El Laco, and dacite from the nearby Láscar volcano, has high trace element concentrations typical of magmatic magnetite.

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Trace Element Geochemistry of Magnetite: Implications

Magnetite commonly exists in magmatic-type deposits and hydrothermal-type deposits as an accessory mineral within igneous, sedimentary, and metamorphic rocks [ 28, 29, 30, 31 ], Magnetite has a typical spinel structure [ 30, 32] and is compatible with trace elements—such as Mg, Al, Ti, V, Cr, Mn, Co, Ni, Zn, and Ga—within its structure [ 28, 31 ].

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Magmatic and Hydrothermal Ore Deposits ResearchGate

As magmatichydrothermal ore deposit was centered by the granitic pluton, in the convection of ore making fluids two opposite effects correspondingly: integrated and dispersive flows. Fluidic

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Magmatic Ore Deposits Sede Medellin

Magmatic Ore Deposits Magmatic ore deposits are those which are formed during crystallization of a magma, deep underground. The host rock for the mineralization can range from ultramafic to felsic. The deposit can consist of massive ores in some cases, a nd disseminations of rare minerals in others.

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Ore deposits related to magmatic activity

Ore Deposits Related to Magmatic Activity. Certain accessory or uncommon constituents of magmas become enriched into bodies of sufficient size and richness to constitute valuable mineral deposits eg. Chromite and platinum. Magmatic ore deposits are characterized by their close relationship with intermediate or deep seated intrusive igneous rocks.

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Magmatic iron ores Naturhistoriska riksmuseet

The purpose of this project is to present additional evidence for a magmatic origin of magnetite-apatite ores. Volcanic ash from El Laco, Chile, composed of fine-grained magnetite (gray), small amounts of apatite (thin white layer at right), sublimated iron phosphate (violet hue at center), and a horizon with orange lumps of an iron-phosphorus-sulfur mineral (below the apatite layer).

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Formation of massive iron deposits linked to explosive

05-10-2018  The world-class El Laco iron deposit in the ELVC consists of six massive magnetite ore bodies that are spatially associated with the pre-existing subvertical annular collapse structures and...

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Iron ore, Magmatic magnetite ore, Hematite ore,

03-01-2011  Magmatic magnetite ore depositsOccasionally granite and ultrapotassic igneous rocks segregate magnetite crystals and form masses of magnetite suitable for economic concentration. A few iron ore deposits, notably in Chile, are formed from volcanic flows containing significant accumulations of magnetite phenocrysts.

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Oxygen isotope composition of magnetite in iron ores of

Magnetite from ore with a magmatic texture has a mean of 3.7‰, and the mean for magnetite intergrown with pyroxene in veins is 2.4‰. Oxygen isotope data given here, fluid inclusion results and geological evidence indicate that ore formation took place in a cooling magmatic system.

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Magnetite Mineral Physical Optical Properties

Uses of Magnetite Most of the iron ore mined today is a banded sedimentary rock known as taconite that contains a mixture of magnetite, The abrasive known as “emery” is a natural mixture of magnetite and corundum. Some synthetic emery is produced by mixing...

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(PDF) Magnetita Pedernales; a new magmatic iron

The most spectacular rapid-growth form is the transition from spherulite fiber to columnar dendrite to octahedron in a single magnetite crystal.A magmatic origin can also be inferred for Magnetita Pedernales because it is an apatite iron ore with development of dendritic magnetite (Figs. 3 and 4).

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Mineral chemistry of magnetite from magnetite-apatite

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 concentrations and displays growth zoning in incompatible elements (Si, Ca, and Ce), compatible elements (Mg, Al, and Mn), large-ion lithophile element (Sr), and high field strength element (Y, Nb,

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Economic geology Magmatic ore deposits_1

Hydrothermal-metasomatic ore deposits 10.Hydrothermal vein deposits 11.Volcanogenic ore deposits Magmatic Ore Formation Systems 32. 1. Orthomagmatic ore formation Oxide (magnetite, ilmenite, chromite), base metal sulphides (Ni, Cu), and ore of precious metals (Pt, Pd, Au) is often found in ultramafic and mafic igneous rocks.

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