magmatic iron deposits
Mesozoic magmatic–hydrothermal iron oxide deposits …
Magmatic-hydrothermal iron oxide (MHIO) deposits in Mexico started forming early after the accretion of oceanic terranes to the Mexican mainland, like the Guerrero composite terrane or the Alisitos arc terrane, was complete by the end of the Early Cretaceous and the buildup of the present-day continental crust was initiated (Camprubí, …
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Triple oxygen isotope variations in magnetite from iron-oxide deposits …
The formation of iron-oxide–apatite (IOA) deposits is much debated. Studies on the origin of IOA deposits have often focused on the δ 18 O values of magnetite, which were suggested to reflect isotopic equilibrium with magmas or with magmatic water; i.e., H 2 O in equilibrium with magma (e.g., Jami et al., 2007; Nyström …
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A deposit model for magmatic iron-titanium-oxide deposits …
@article{Woodruff2013ADM, title={A deposit model for magmatic iron-titanium-oxide deposits related to Proterozoic massif anorthosite plutonic suites: Chapter K in Mineral Deposit Models for Resource Assessment}, author={Laurel G. Woodruff and Suzanne W. Nicholson and David L. Fey}, journal={Scientific Investigations Report}, year={2013}, url ...
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(PDF) ORIGIN OF HIGH-Ti MAGNETITE IN MAGMATIC
PDF | On Aug 12, 2022, Liping Zeng and others published ORIGIN OF HIGH-Ti MAGNETITE IN MAGMATIC-HYDROTHERMAL SYSTEMS-EVIDENCE FROM IRON OXIDE-APATITE (IOA) DEPOSITS OF EASTERN CHINA | Find, read ...
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Geological settings and metallogenesis of high-grade iron deposits …
The predominant types of high-grade iron deposits in China include skarn, sedimentary metamorphic (banded iron-formation, BIF-type), continental/submarine volcanic-hosted and magmatic Fe-Ti-V oxide deposits. Based on a comprehensive review of current studies on these deposits, this paper suggests that the oxygen concentration …
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Geological settings and metallogenesis of high-grade iron deposits …
The predominant types of high-grade iron deposits in China include skarn, sedimentary metamorphic (banded iron-formation, BIF-type), continental/submarine volcanic-hosted and magmatic Fe-Ti-V ...
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Occurrence and enrichment of cobalt and nickel in the …
Notably, magmatic iron oxide deposits associated with mafic–ultramafic igneous complexes, commonly accompanied by sulfide mineralization, demonstrate a similar magmatic affinity to magmatic Ni-Cu-Co sulfide deposits, indicating an economic potential of Co and Ni in these deposits (Bhattacharjee and Mondal, 2021, Mikulski et …
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Magmatic-hydrothermal processes within an evolving Earth: Iron …
Iron oxide-copper-gold (IOCG) deposits formed by magmatic-hydrothermal fluids (MH-IOCG) share many similarities with, but have important differences from, porphyry Cu ± Mo ± Au (porphyry) deposits: MH-IOCG deposits predominantly occur in Precambrian rocks, are Fe oxide rich, and have volumetrically extensive high …
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Formation of iron oxide–apatite deposits
Iron oxide–apatite deposits can form from purely igneous (~1,000–800 °C), through late magmatic or magmatic–hydrothermal (~800–600 °C), to purely …
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Magmatic ore deposits (Chapter 2)
Ore Deposit Geology - July 2013. Magmatic ore deposits, also known as orthomagmatic ore deposits, are deposits within igneous rocks or along their contacts in which ore minerals crystallised from a melt or were transported in a melt. Ore deposits that form in and around igneous rock units as a result of mineral precipitation from aqueous …
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20.1: Metal Deposits
A magmatic deposit is one in which the metal concentration takes place primarily at the same time as the formation and emplacement of the magma. ... (PageIndex{5})). Unlike many other metals, which are economically viable at grades of around 1% or even much less, iron deposits are only viable if the grades are in the …
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Magmatic immiscibility and the origin of magnetite-(apatite) …
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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9.3.2: Hydrothermal Ore Deposits
The largest VMS deposits, about twice the size of the Kidd, are the Windy Craggy deposit in British Columbia, discovered in 1958, and the Rio Tinto deposit in Spain, discovered in 1972. The quality of the ore in massive sulfide deposits is high, host rocks are generally greater than 60% ore minerals, so even if they are small, massive …
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Magmatic immiscibility and the origin of magnetite-(apatite) …
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 …
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Mineral deposit
Mineral deposit - Magmatic Cumulates: Magmatic segregation is a general term referring to any process by which one or more minerals become locally concentrated (segregated) during the cooling and crystallization of a magma. ... Cumulus deposits of magnetite make poor iron ores, because cumulus magnetites invariably contain elements such as ...
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A Deposit Model for Magmatic Iron-Titanium …
Abstract. This descriptive model for magmatic iron-titanium-oxide (Fe-Ti-oxide) deposits hosted by Proterozoic age massif-type anorthosite and related rock types presents their geological, …
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Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits
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 melt inclusions trapped in plagioclase phenocrysts in andesite hosting the MtAp mineralization at El Laco, Chile.
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8.1: Metal Deposits
Magmatic Deposits. A magmatic deposit is one in which the metal concentration takes place primarily at the same time as the formation and emplacement of the magma. Most of the nickel mined in the world, and much of the copper, comes from magmatic deposits such as those in Indonesia, Canada, southern Africa, Australia and …
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Genesis of the Beizhan Iron Deposit in Western Tianshan, …
The Beizhan iron deposit (468 Mt at an average grade of 41% Fe) is the largest iron deposit in the Awulale iron metallogenic belt of Western Tianshan, northwest China. The high-grade magnetite ores are hosted in the Carboniferous volcanic rocks with extensive development of skarn alteration assemblages. While considerable progress …
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9.3.1: Magmatic Ore Deposits
9.3.1.1 Magmatic Sulfides and Cumulates. Mafic and ultramafic magmas, like all common magmas, contain the major elements oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and …
ادامه مطلبMagmatic iron ores and associated mineralisation: …
iron deposits in the Coastal Cordillera of Chile also have features that suggest a magmatic origin. Associated with these magmatic ore deposits are economic and sub-economic concentrations of Cu ...
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A New Depositional Framework for Massive Iron …
The oldest recognized proxies for low atmospheric oxygen are massive iron-rich deposits. Following the rise of oxygen ∼2.4 billion years ago (Ga), massive iron formations (IFs) largely disappear from …
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Magmatic Deposits
Magmatic deposits can roughly be divided into three groups. The first group includes deposits associated with primitive magmas that originate directly from the Earth's mantle such as basalt. Such basic and ultrabasic magmas can form deposits of chromium, nickel, platinum, iron, titanium, and vanadium. ... Such segregation may play …
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The role of iron-rich hydrosaline liquids in the formation of …
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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Magmatic origin of giant 'Kiruna-type' apatite …
These include direct magmatic segregation or crystallization, magmatic hydrothermal replacement and hydrothermal precipitation in the sense of iron-oxide-copper-gold (IOCG-type) …
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Minerals | Free Full-Text | Elucidating the Genetic Mechanism …
The Kaladawan iron deposit is located in the North Altyn Tagh and exhibits occurrences of iron ore bodies at the contact zone between Ordovician magmatic rocks (basalts, rhyolite, and granodiorite) and marble. However, controversy persists regarding the genetic classification and metallogenic mechanism of this deposit. Through a field …
ادامه مطلب20.1 Metal Deposits – Physical Geology
Magmatic Nickel Deposits . ... Unlike many other metals, which are economically viable at grades of around 1% or even much less, iron deposits are only viable if the grades are in the order of 50% iron and if …
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Magmatic ore deposits in layered intrusions
Layered, ultramafic to mafic intrusions are uncommon in the geologic record, but host magmatic ore deposits containing most of the world's economic concentrations of platinum-group elements (PGE) (figs. 1 and 2). These deposits are mined primarily for their platinum, palladium, and rhodium contents (table 1). Magmatic ore deposits are …
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Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits
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 melt inclusions trapped in plagioclase phenocrysts in andesite hosting the MtAp mineralization at El La …
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A deposit model for magmatic iron-titanium-oxide deposits …
This descriptive model for magmatic iron-titanium-oxide (Fe-Ti-oxide) deposits hosted by Proterozoic age massif-type anorthosite and related rock types presents their geological, mineralogical, geochemical, and geoenvironmental attributes. Although these Proterozoic rocks are found worldwide, the majority of known deposits are found within exposed …
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