The predominant types of high-grade iron deposits in China include skarn, sedimentary metamorphic (banded iron-formation, BIF-type), continental/submarine …
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 …
The primary mechanism of formation of skarn iron deposits is hydrothermal activity associated with contact metasomatism (Edwards and Atkinson, 1986, Hall et …
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 ...
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 …
The Jinshandian iron deposit contains ore minerals of magnetite, pyrite, and hematite, as well as gangue minerals of diopside, phlogopite, anhydrite, andalusite, chlorite, epidote, calcite, garnet, gypsum, and titanite. ... In addition to magmatic–hydrothermal stratabound deposits associated with Cu and Au (such as the Tongling district ...
The third mechanism for the formation of silicate-hosted iron deposits is the deep-seated magmatic differentiation where the ore-forming materials and magma are of the same origin and both come from the upper mantle (Lin et al., 1984, Lin and Xu, 1989, 1998; Pei et al., 1985). It is believed that the direct ore-controlling factor for the ...
The Chengchao iron skarn deposit is located in the northern portion of the Daye Fe Cu mineralizing district, western Middle-Lower Yangtze River Metallogenic Belt along the northeastern margin of the Yangtze Craton (Fig. 1 a).This metallogenic belt contains more than 200 deposits and has been one of the most important Fe Cu Au …
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 are masses of igneous rock enriched in useful chemical elements to such an extent that it is feasible to mine them at a profit. To be considered an ore, an accumula- ... With the sole exception of iron, the ore elements identified in Figure 2are all trace elements in primary magmas, and their
A Deposit Model for Magmatic Iron-Titanium-Oxide Deposits Related to Proterozoic Massif Anorthosite Plutonic Suites (USGS PDF) Titanium-vanadium deposits hosted in mafic-ultramafic layered intrusions and massif anorthosite intrusions from around the world: U.S. Geological Survey data release (Academic Article Link )
Formation of various types of iron ore deposits by concentration of iron in the Earth's surface environments. Tsubasa OTAKE, Yoko ... There are various geological processes that concentrate Fe and form Fe ore deposits, including magmatic, hydrothermal, and sedimentary processes. Fe ore deposits can be divided into orthomagmatic type (or Fe …
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 ...
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 …
Au-poor magmatic-related deposits form from dominantly asthenospheric or crustal melts (such as Cu-rich or W-Sn porphyry, respectively). ... and distinction from other epigenetic iron oxide ...
These findings strongly support the conclusion that the Beizhan iron deposit underwent a process of magmatic–hydrothermal mineralization. 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 …
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 …
Magnetite (Fe3O4): Magnetite is a common magmatic ore mineral that is an important source of iron, which is used in the production of steel and other industrial applications. Magnetite can form in a wide range of igneous rocks, including mafic and ultramafic rocks, and it can be extracted from magnetite deposits through open-pit or …
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 …
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 …
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 …
Iron oxide–apatite deposits can form from purely igneous (~1,000–800 °C), through late magmatic or magmatic–hydrothermal (~800–600 °C), to purely …
The Pilot Knob magnetite deposit (PKM) is located in Iron County, Missouri, USA (Fig. 1), and was mined from 1968 to 1980, producing 20 million tons averaging 35–40% iron (Kisvari, 1990).The deposit consists of a series of tabular forms that strike northwest and dip about 45° southwest (Figs. 2 & 3), approximately parallel to …
Simon, A. C. et al. Kiruna-Type Iron Oxide-Apatite (IOA) and Iron Oxide Copper-Gold (IOCG) Deposits Form by a Combination of Igneous and Magmatic-Hydrothermal Processes: Evidence from the Chilean ...
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. The results of our study …
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 ...
The magmatic model suggests that iron ores are precipitated from highly evolved iron-rich melts segregated from subvolcanic silicate magmas, whereas the …
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, …
The Zhaoanzhuang magnetite-apatite deposit (113°29ʹE, 33°22.5ʹN) is located in Wugang City of the Henan province in the southern North China Craton (NCC) (Fig. 1 A).The ore deposit has an ore reserve of>96 million metric tons (Mt) at > 40 wt% Fe and 4.8 Mt at 2.0 wt% P, making it one of the largest iron deposits in the southern NCC.
1. Introduction. China has a rich reserve of iron ores, and hosts most of the major types of iron deposits recognized over the world. However, most of these deposits are low-grade ores (<50% Fe), and the high-grade iron ores only account for ∼1% of the total iron ore resources (Zhang et al., 2014a).During 50s to 70s of the last century, two …
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 they are very large. Figure 20.7 Banded iron formation from an unknown location in North America on display at a museum in Germany. The ...
Here, we provide new evidence that supports subaerial volcanic eruptions in magmatic arcs as a viable process for the accumulation of metals at or near the surface …
@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 ...
The world-renowned El Laco iron deposit in the Chilean Altiplano represents the Earth's youngest and one of the best-exposed records of iron oxide …
Abstract - The El Laco magnetite-apatite ore deposits in the Andean Cordillera of northern Chile occur as massive, tabular bodies, as stratified, pyroclastic ores, and as crosscutting dykes...
The new conceptual model proposed in this study for the XSM Fe deposit envisages the following processes: (a) "iron magma" formed by dioritic magma reacted with carbonate rocks in the deep magma chamber; (b) sinking of this high density fraction into the bottom of the chamber; (c) introduction of volatiles of deep magmatic chamber into …
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 …
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 …
The iron ore-related magmatic suites in China exhibit a compositional spectrum from mafic–ultramafic to intermediate-felsic rock suites. Following the recent classification scheme by Dill (2010), these iron deposits are categorized as: (1) Ti–Fe–(V) deposits related to mafic intrusions (high Ti); (2) apatite-bearing Fe oxide deposits (low ...
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 …