contact metamorphism iron ore

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contact metamorphism iron ore

contact metamorphism iron ore

Contact metamorphism and ore deposition

Moreover, measured temperatures of Concepcion del Oro ores fall within the range accepted for hypothermal deposits. It is suggested that these contact metasomatic deposits are properly classified as a particular type within the larger genetic group of high

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Metamorphic amphiboles in the Ironwood Iron

2020-7-28  The Paleoproterozoic Ironwood Iron-Formation, a Superior-type banded iron formation located in the western Gogebic Iron Range in Wisconsin, is one of the largest undeveloped iron ore resources in the United States. Interest in the development of this resource is complicated by potential environmental and health effects related to the presence of amphibole minerals in the Ironwood, a consequence of Meso-proterozoic contact metamorphism. The presence of these amphiboles and their contact metamorphic origin have long been recognized; however, recent interest in this resource has highlighted the lack of detailed knowledge on their distribution, mineral chemistry, and morphology. Optical microscopy, X-ray diffraction, scanning electron microscopy, and electron microprobe analysis were utilized to investigate the origin, distribution, morphology, and chemistry of amphiboles in the Ironwood.Amphibole is present in the western portion of the study area due to regional-scale contact meta-morphism

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Contact Metamorphism by a Tertiary Dyke at Waterfoot,

metamorphism, due to reaction between the calcite and the chloritic mineral. Associated with the pyroxene granules and chlorite are grains of iron-ore and fine needles of rutile. The quartz grains have finely irregular (probably fritted) margins, and occasionally have a fringe of optically continuous spine-like

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The Chinese Iron Ore Deposits and Ore Production

2018-7-17  Among more than 2000 iron ore deposits identified, the contact metasomatic-hydrothermal iron deposits account for 39% of the total iron ore deposits, followed by sedimentary metamorphism (28%) and sedimentary (20%), weathered leaching (7%), volcanic (3%) and magmatic (3%) iron ore are in small numbers.

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Metamorphosed Banded Iron Formation of

2020-7-3  The metamorphosed Banded Iron Formation (BIF) of Gorumahisani-Sulaipat-Badampahar (GSB) belt in Precambrian Iron Ore Group, Singhbhum Craton, is well known in the mineral map of India. Detailed characteristics of iron ore and iron-containing rocks in BIF have been investigated at different mine profiles and results are interpreted in terms of their genetic evolution.

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Contact Metamorphism an overview

2021-8-2  Contact Metamorphism. Contact metamorphism is a static thermal metamorphism in the vicinity of hot intrusive igneous bodies, and metamorphic rock is formed within the zone of contact metamorphism—contact aureole. From: Unconventional Petroleum Geology, 2013.

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Eagle Mountain Mine— geology of the former Kaiser

2001-9-27  Setting of iron ore The iron deposits are broadly stratabound and NNE-dipping, forming two horizons extending 11 km laterally in contact-metamorphosed sedimentary rocks. They roughly follow the contact of this sequence with porphyritic granitoid rocks of Jurassic age to the north. These vary in composition and texture but are generally referred to as

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MAGNETITE-HEMATITE IRON ORE OCCURRENCES IN

2020-1-5  In this area, ten iron ore outcrops have been found and investigated by trenches. They are situated in the orthogreenschists, very close to the contact with the parametamorphic schists. Krulc (1954) carried out certain geomagnetic measurements in the same area. The anomalies of 500-800 γ (locally 1000 γ) are very shallow, only 2-12 m.

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Origin of sedimentary hosted high-grade iron ore deposits

2019-9-27  deformation, ore bodies commonly in fault contact with unaltered iron formation Leached, Fe -depleted, silica rich cap over some ore bodies (e.g. Knob Lake) REE data, remobilization of some “immobile” elements Oxidized altered iron formation recorded between some ore bodies (w. iron remobilization) Evidence obscured by later supergene alteration

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BIF-hosted iron ore deposits-Hamersley style

2016-1-3  typically call for :0; 0.075% P, iron ores in Australia tend to be considered in terms of' low phos or high ph as '. BIF-hosted iron ores can be divided broadly into three groups: I. Leached BIF: i.e. residual concentrates of Fe oxides ('blue dust ores'). Very low P. 2. Martite- goethite ores: moderate-high P, typically 0.07-0.17% P. 3.

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Contact Metamorphism by a Tertiary Dyke at Waterfoot,

metamorphism, due to reaction between the calcite and the chloritic mineral. Associated with the pyroxene granules and chlorite are grains of iron-ore and fine needles of rutile. The quartz grains have finely irregular (probably fritted) margins, and occasionally have a fringe of optically continuous spine-like

get price

The Chinese Iron Ore Deposits and Ore Production

2018-7-17  Among more than 2000 iron ore deposits identified, the contact metasomatic-hydrothermal iron deposits account for 39% of the total iron ore deposits, followed by sedimentary metamorphism (28%) and sedimentary (20%), weathered leaching (7%), volcanic (3%) and magmatic (3%) iron ore are in small numbers.

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Features of the contact metamorphism in ores of

Download Citation Features of the contact metamorphism in ores of the Novo-Uchaly deposit, South Urals The article presents the impact of contact metamorphism on the ores of the large Novo

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The Chinese Iron Ore Deposits and Ore Production

2018-7-11  Among more than 2000 iron ore deposits identified, the contact metasomatic-hydrothermal iron deposits account for 39% of the total iron ore deposits, followed by sedimentary metamorphism (28%) and sedimentary (20%), weathered leaching (7%), volcanic (3%) and magmatic (3%) iron ore

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Sedimentary Hosted Iron Ores ResearchGate

Iron ore has been mined from igneous, metamorphic and sedimentary hosted deposits Contact metasomatic; (4) Hydrothermal with two subtypes, (BIF) are older than 2.0 Ga intense metamorphism

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BIF-hosted iron ore deposits-Hamersley style

2016-1-3  • Burial metamorphism converts goethite to microplaty hematite, destroying internal texture, but beddingllamination remains to high metamorphic grades. Section 6 Deposit Marra Mamba Figure I. Generalised section at MtTom Price, showing metamorphosed iron ore deposits (lIlp/ H) in

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The Effects of contact metamorphism on the host rocks

2020-11-15  However, the contact metamorphism associated with the intrusion of these plutons also caused calc-silicate alteration; which replaced the reactive, favorable, carbonate host rocks near these stocks with less favorable, unreactive, calc-silicate minerals such as wollastonite. Due to this replacement the Carlin ore fluids could

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7.5: Contact Metamorphism and Hydrothermal

2020-8-11  7.5: Contact Metamorphism and Hydrothermal Processes. Contact metamorphism takes place where a body of magma intrudes into the upper part of the crust. Any type of magma body can lead to contact metamorphism, from a thin dyke to a large stock. The type and intensity of the metamorphism, and width of the metamorphic aureole will depend on a

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Origin of sedimentary hosted high-grade iron ore deposits

2019-9-27  deformation, ore bodies commonly in fault contact with unaltered iron formation Leached, Fe -depleted, silica rich cap over some ore bodies (e.g. Knob Lake) REE data, remobilization of some “immobile” elements Oxidized altered iron formation recorded between some ore bodies (w. iron remobilization) Evidence obscured by later supergene

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Hydrothermal and metamorphic fluid-rock

2015-9-1  The Quadrilátero Ferrífero (QF; Fig. 1), Minas Gerais, Brazil represents one of the largest iron ore producing districts worldwide with estimated ore reserves of approximately 6.0 Gt and over 600 Mt of high-grade (> 60 wt.% Fe) iron ore (Rosière et al., 2008).The economically important ore deposits (with reserves over 100 Mt @ > 60 wt.% Fe or reserves over 250 Mt @ ~ 50 wt.% Fe) are mainly

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BIF-hosted iron ore deposits-Hamersley style

2016-1-3  • Burial metamorphism converts goethite to microplaty hematite, destroying internal texture, but beddingllamination remains to high metamorphic grades. Section 6 Deposit Marra Mamba Figure I. Generalised section at MtTom Price, showing metamorphosed iron ore deposits (lIlp/ H) in

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Sedimentary Hosted Iron Ores ResearchGate

Iron ore has been mined from igneous, metamorphic and sedimentary hosted deposits Contact metasomatic; (4) Hydrothermal with two subtypes, (BIF) are older than 2.0 Ga intense metamorphism

get price

Contact Metamorphism by a Tertiary Dyke at Waterfoot,

metamorphism, due to reaction between the calcite and the chloritic mineral. Associated with the pyroxene granules and chlorite are grains of iron-ore and fine needles of rutile. The quartz grains have finely irregular (probably fritted) margins, and occasionally have a fringe of optically continuous spine-like

get price

The Effects of contact metamorphism on the host rocks

2020-11-15  However, the contact metamorphism associated with the intrusion of these plutons also caused calc-silicate alteration; which replaced the reactive, favorable, carbonate host rocks near these stocks with less favorable, unreactive, calc-silicate minerals such as wollastonite. Due to this replacement the Carlin ore fluids could

get price

The Chinese Iron Ore Deposits and Ore Production

2018-7-17  Among more than 2000 iron ore deposits identified, the contact metasomatic-hydrothermal iron deposits account for 39% of the total iron ore deposits, followed by sedimentary metamorphism (28%) and sedimentary (20%), weathered leaching (7%), volcanic (3%) and magmatic (3%) iron ore are in small numbers.

get price

The Chinese Iron Ore Deposits and Ore Production

2018-7-11  Among more than 2000 iron ore deposits identified, the contact metasomatic-hydrothermal iron deposits account for 39% of the total iron ore deposits, followed by sedimentary metamorphism (28%) and sedimentary (20%), weathered leaching (7%), volcanic (3%) and magmatic (3%) iron ore

get price

7.5: Contact Metamorphism and Hydrothermal

2020-8-11  7.5: Contact Metamorphism and Hydrothermal Processes. Contact metamorphism takes place where a body of magma intrudes into the upper part of the crust. Any type of magma body can lead to contact metamorphism, from a thin dyke to a large stock. The type and intensity of the metamorphism, and width of the metamorphic aureole will depend on a

get price

"The Effects of contact metamorphism on the host

2011-9-9  The different ways in which these rock types respond to the contact metamorphism plays an important role in ore control at the deposit. The strongly calc-silicate altered rocks are poor hosts for Carlin-type gold deposition. The ore fluids which were moderately acidic, pH 3-4, required carbonates to generate porosity and permeability, as well

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METAMORPHIC ROCKS & PROCESSES

2013-6-21  Contact Metamorphism Concentric zones of alteration surrounding a magma body comprise an aureole. The zone closest to the intrusion contains higher temperature Iron Hematite Fe 2O 3 steel manufacturing Magnetite Fe 3O 4 Lead Galena PbS batteries, pipes, solder Hydrothermal contact metamorphism produces many metal ore minerals.

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Glossary of Mining Terms SEC

2017-10-14  Contact metamorphism Metamorphism of country rocks adjacent to an intrusion, Sinter Fine particles of iron ore that have been treated by heat to produce blast furnace feed. Skarn Name for the metamorphic rocks surrounding an igneous intrusive where it comes in contact with a limestone or dolostone formation.

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