No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
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-apatite (IOA)-type …
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.
World-class magmatic ore systems are often characterised by fluids/melts that are derived from deep lithosphere, mostly located at the margins of ancient craton 1,2,3,4,5,6.There is, however ...
Magnetite-(apatite) ore deposits are interpreted as being formed by the crystallization of iron-rich ultrabasic melts, dominantly generated by the interaction of silicate melts with oxidized P-F-SO4-bearing sedimentary rocks. This hypothesis is supported by geologic evidence, experimental studies, numerical modeling, stable and radiogenic isotope …
Further, our model explains the observed coexisting purely magmatic and hydrothermal-magmatic features and allows a genetic connection between Kiruna-type IOA and iron oxide–copper–gold deposits, contributing to a …
Over 30 magmatic Ni-Cu-Co sulfide deposits have been discovered in China (Fig. 1), two of which are the world-class Jinchuan deposit and the super-large Xiarihamu deposit, with nickel metal resources exceeding one million tonnes representing ∼80% of China's nickel and cobalt resources [21].China's earliest discovered magmatic Ni-Cu-Co mineralisation is the …
Steel is a foundation of national economic construction. Magnetite and hematite are the main minerals for the recovery of Fe to make steel. The main source of Fe deposits in most of the world is banded iron formation, but in China magmatic-hydrothermal Fe deposits are the main Fe-enriched (total Fe > 50%) type of deposit.
The magmatic model suggests that iron ores are precipitated from highly evolved iron-rich melts segregated from subvolcanic silicate magmas, whereas the magmatic-hydrothermal model refers to the formation of iron deposits from Fe-rich fluids exsolved from cooling magma or the interaction of such fluid with the host rocks.
The origin of giant Kiruna-type iron ores has been debated for nearly 100 years. This study employs extensive stable isotope data from Kiruna-type ores worldwide and magmatic and hydrothermal ...
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 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 …
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 major research and exploration …
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 investigation, single …
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 …
Iron oxide–apatite deposits, including the massive deposits at Kiruna, Sweden (Fig. 1), are principally comprised of magnetite and apatite minerals.Models for their formation range from purely ...
The Awulale Iron Metallogenic Belt (AIMB) has developed many medium–large iron deposits, of which the Zhibo iron deposit is selected as the research object in this paper. The Zhibo deposit's ore primarily consists of …
Below, we look at some of the most important kinds of igneous deposits. Mafic and ultramafic magmas, like all common magmas, contain the major elements oxygen, silicon, …
A magmatic ore deposit is an accumulation of magmatic minerals. Some of these minerals are extremely rare and almost never encountered in common rocks, an example being alloys of the platinum metals; other minerals, such as magnetite, are common and can be seen in many thin sections.
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 underground ...
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 …
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 that ...
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 Ti); (3) apatite-bearing Fe oxide …
90 3 Magmatic (Orthomagmatic) Deposits … 3.1 Introduction Magmatic deposits: ores formed by direct crystallization and accumulation from a magma Deposits associated with mafic–ultramafic rocks • Chromite deposits: (i) stratiform chromite in layered intrusions, and (ii) podiform chromite in ophiolite complexes • Magmatic sulfides (Cu ...
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 by …
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 a role in ...
Subsequent melting (which may be much later) contributes Au to magmatic systems, forming deposits of porphyry Cu-Au, epithermal Au, iron oxide Cu-Au, intrusive-related orogenic Au, and possibly ...
Iron oxide–apatite (IOA or Kiruna-type) deposits typically consist of a magnetite-apatite-actinolite/diopside assemblage and are spatially associated with extensive Na-(Ca) alteration and brecciation. The origin of these deposits is highly controversial and has been ascribed to the separation of iron-oxide/sulfate-(carbonate) melts, magnetite emulsions, or …
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
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 rocks of the …
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 …
