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18 rowsBecause magnetite is ubiquitous in ore deposits formed under diverse conditions—ranging from ...
Magmatic mineral deposits are formed when processes such as partial melting and fractional crystallization occur during the melting and cooling of rocks. Layered intrusion (typically ultramafic to mafic) can be host to deposits that contain copper, nickel, platinum-palladium-rhodium, and chromium.
The largest magmatic deposits in the world are the chromite deposits in the Bushveld Igneous Complex in South Africa . Rocks of the Bushveld Igneous Complex have an areal extent larger than the state of Utah. ... Metamorphism of iron and/or sulfide deposits commonly results in an increase in grain size that makes separation of gangue from the ...
Iron oxide–apatite deposits can form from purely igneous (~1,000–800 °C), through late magmatic or magmatic–hydrothermal (~800–600 °C), to purely …
19 rowsAbstract. This descriptive model for magmatic iron-titanium-oxide (Fe-Ti-oxide) deposits ...
Taking the Xiaoyangchong zinc–iron deposit as an example, the Cd content of the massive sphalerite ore in the Xiaoyangchong mine reached an economic level for industrial production, with the content of Cd in massive magnetite ore also being relatively high. ... Li, S.G. Infrastructure of Mesozoic magmatic rocks and copper-iron …
The Iron Springs deposits have been described as being of magmatic–hydrothermal origin 22, 23, 24, on account of their skarn-like features, which include massive replacement-style ore bodies...
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.
A magmatic deposit is one in which the metal concentration takes place primarily at the same time as the formation and …
This reaction is very common in magnetite from igneous and metamorphic rocks and magmatic Fe-Ti oxide and iron skarn deposits (Hu et al., 2015, Tan et al., 2016, Huang et al., 2019). Recently, Brzozowski et al. (2020) proposed that CO 2 can also serve as an important oxidizing agent for the oxidation of magnetite-ulvöspinel assemblages: …
The Plio-Pleistocene El Laco magnetite ore bodies in the Chilean Altiplano represent an unusual subvolcanic/aerial type of an iron oxide-apatite (IOA) deposit. The textures of these magnetite ore bodies have sustained a long-standing geological controversy on the origin of iron oxide deposits with models spanning the spectrum …
A deposit model for magmatic iron-titanium-oxide deposits related to Proterozoic massif anorthosite plutonic suites. This descriptive model for magmatic iron …
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 …
The formation of high-grade iron deposits is mostly associated with the processes related to multiple stages of superimposition, e.g., desiliconization and iron enrichment, removal of impurity, and remobilization and re-precipitation of iron.
Abstract. This descriptive model for magmatic iron-titanium-oxide (Fe-Ti-oxide) deposits hosted by Proterozoic age massif-type anorthosite and related rock types …
Voisey's Bay is one of the largest magmatic Ni-Co-Cu deposits in the world. With resources of 32.4 Mt @ 2.13% Ni and 0.13% Co (as of 2018), it's location on northern Labrador, Canada's coast also allows uniquely favorable access to maritime shipping, making it a low-cost, high margin producer. Map of the Voisey's Bay mine and …
The deposits, which may form centimeters-, or meters-thick layer called a cumulate, are often entirely, or nearly entirely, composed of sulfide minerals. This process produces magmatic sulfide deposits, …
Magnetite is a major constituent of iron oxide-apatite (IOA) deposits and has been the focus of elemental and isotopic analyses to address debates on ore genesis processes (e.g., Frietsch and...
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 …
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 …
An unusual magmatic process is a kimberlite pipe, which is a volcanic conduit that transports ultramafic magma from depths in the mantle to the surface. Diamonds, which are formed at great temperature and depth, …
The origin of magnetite- (apatite) iron deposits (MtAp) is among the most contentious issue in ore geology with competing models involving purely hydrothermal to magmatic processes. We study here ...
The distribution of iron-rich ore bodies and deposit is controlled by the basement tilting and faults, with the deposit exhibiting a U-shaped distribution and the mineral body occurring in a lens-like shape. In addition, the electrical results indicate the presence of high-resistance magma along faults that intrude the deposit.
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 …
Magmatic Deposits Certain kinds of mineral deposits form integral parts of igneous rock masses and permit the inference that they have originated, in their present form, by processes of differentiation and cooling in molten magmas. (Lindgren p. 863, 1929). ... The intergrowth could be due to diffusion of iron into the plagioclase ...
Download Citation | On Apr 1, 2023, Placide Uwamungu and others published Evolution of Fe-Ti oxides within the Tiechagou carbonatite-related iron deposit: Insights from texture and in situ ...
Iron oxide–apatite deposits can form from purely igneous (~1,000–800 °C), through late magmatic or magmatic–hydrothermal (~800–600 °C), to purely hydrothermal (<600 °C) conditions. Cooling...
Magnetite is the main iron-bearing component in Kiruna-type deposits and our approach therefore utilizes highly reliable major elements as petrogenetic tracers, as opposed to, e.g., traditional...
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...
The origin of magnetite- (apatite) iron deposits (MtAp) is among the most contentious issue in ore geology with competing models involving purely hydrothermal to magmatic processes. We study...
The world-class El Laco iron deposit in the ELVC consists of six massive magnetite ore bodies that are spatially associated with the …
According to Bain and colleagues, there are a number of iron oxide–apatite deposits, including those at Kiruna, for which this particular combination of silicate magma intruding...
The genetic link between magmas and ore deposit formation is well documented by studies of fossil hydrothermal systems associated with magmatic intrusions at depth. However, the role of explosive ...
In magmatic deposits, magnetite occurs with apatite and pyroxenes, while in contact metamorphic rocks it is more commonly found with garnet, pyroxene, olivine and metallic sulfides such as pyrite and chalcopyrite. In high temperature hydrothermal veins it often associated with sphalerite and galena.
January 1, 2014 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.