Mantlederived Magmas And Magmatic Nicupge Deposits

Magmatic Fe-Ni-Cu ± platinum-group element (PGE) sulfide deposits form when mantle-derived mafic and ultramafic magmas become saturated in sulfide and segregate …

A large proportion of ores in magmatic sulfide deposits consist of mixtures of cumulus silicate minerals, sulfide liquid, and silicate melt, with characteristic textural relationships that provide essential clues to their origin. Within silicate-sulfide cumulates, there is a range of sulfide abundance in magmatic-textured silicate-sulfide ores between ores with up to about …

A question fundamental to the study of magmatic ore deposits is whether the parental magmas must have unusually high contents of ore metals in order to form an ore deposit, or whether the ore-forming process depends more on the history of the mantle-derived magma, particularly the

Magmatic sulfide ore deposits are some of the world's most valuable metal accumulations, currently accounting for ∼56% of the world's nickel production (Mudd and Jowitt, 2014, Peck and Huminicki, 2016). ... Magmatic sulphides in Quaternary Ecuadorian arc magmas. Lithos, Volumes 296–299, 2018, pp. 580-599.

Assimilation by mafic to ultramafic magmas of sulfur-bearing country rocks is considered an important contributing factor to reach sulfide saturation and form magmatic Ni–Cu–platinum group ...

Abstract Magmatic Ni-Cu sulfide deposits form as the result of segregation and concentration of droplets of liquid sulfide from mafic or ultramafic magma, and the partitioning of chalcophile elements into these from the silicate melt. Sulfide saturation of a magma is not enough in itself to produce an ore deposit. The appropriate physical environment is required …

Magmatic sulfide ore deposits are some of the world's most valuable metal accumulations, currently accounting for ∼56% of the world's nickel production (Mudd and Jowitt, 2014, Peck and Huminicki, 2016).They form by the accumulation of immiscible sulfide liquid that scavenged chalcophile elements from a coexisting silicate magma in various settings and …

13.8.3 Fertility of Primary Magmas 197 13.8.4 Incompatible Element Deposits 200 13.8.4.1 Rare-Element Granites, Syenites, and Pegmatites 200 ... 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-

Here we review the characteristics of some diamond, platinum-group elements (PGE), Ni-Cu- (PGE) and (Cu-)Au ore deposits worldwide, and argue that the history, structure and evolution of the SCLM...

The three most crucial factors for the formation of large and super-large magmatic sulfide deposits are: (1) a large volume of mantle-derived mafic-ultramafic magmas that …

Magmatic Fe-Ni-Cu ± platinum-group element (PGE) sulfide deposits form when mantle- derived mafic and ultramafic magmas become saturated in sulfide and segregate immiscible sulfide liquid ...

The nickel deposits mainly distributed in 19 provinces and autonomous regions in China are 339 ore deposits/occurrences, including 4 super large-scale deposits, 14 large-scale deposits, 26 middle ...

Ore forming processes involve the redistribution of heat, mass and momentum by a wide range of processes operating at different time and length scales. The fastest process at any given length scale tends to be the dominant control. Applying this principle to the array of physical processes that operate within magma flow pathways leads to some key insights into the origins of …

For example, it is commonly assumed that ultramafic-mafic intrusions and associated Ni-Cu-PGE deposits of the Noril'sk area genetically linked to the ~250 Ma Siberian flood-basalt volcanism (e.g., Campbell et al., 1992; Naldrett et al., 1995).However, based on petrography, bulk chemical analyses and phase equilibria, it was shown that there is no …

Magmatic Fe-Ni-Cu ± platinum-group element (PGE) sulfide deposits form when mantle-derived mafic and ultramafic magmas become saturated in sulfide and segregate immiscible sulfide …

Magmatic Fe-Ni-Cu ± platinum-group element (PGE) sulfide deposits form when mantle- derived mafic and ultramafic magmas become saturated in sulfide and segregate immiscible sulfide liquid ...

Magmatic Fe-Ni-Cu ± platinum-group element (PGE) sulfide deposits form when mantle- derived mafic and ultramafic magmas become saturated in sulfide and segregate …

Magmatic Fe-Ni-Cu ± platinum-group element (PGE) sulfide deposits form when mantle- derived mafic and ultramafic magmas become saturated in sulfide and segregate immiscible sulfide …

Magmatic sulfide deposits fall into two major groups when considered on the basis of the value of their contained metals, one group in which Ni, and, to a lesser extent, Cu, are the most valuable products and a second in which the PGE are the most important. The first group includes komatiite- (both Archean and Paleoproterozoic), flood basalt ...

In most deposits, ore formation is linked directly to incorporation of S-rich country rocks and only indirectly to contamination by granitic crust. However, the geochemical signature of contamination is easily recognized and is a useful exploration guide because it identifies magmas that had the capacity to incorporate crustal material.

The three most crucial factors for the formation of large and super-large magmatic sulfide deposits are: (1) a large volume of mantle-derived mafic-ultramafic magmas that participated in the ...

Pegmatites rich in beryllium, tin, and niobium are a good example of late magmatic deposits. The ore deposits formed by magmatic processes are divided into two categories: early magmatic deposits. late magmatic deposits. Early magmatic deposits. Early magmatic deposits, also known as orthomagmatic deposits, are known to form directly from ...

Time scales and length scales in magma flow pathways and the origin of magmatic Ni-Cu-PGE ore deposits. March 2018 ... in komatiite magmas. Sulfides in the Archean magmatic and sedimentary host ...

Magmatic Fe-Ni-Cu ± platinum-group element (PGE) sulfide deposits form when mantle-derived mafic and ultramafic magmas become saturated in sulfide and segregate immiscible sulfide …

This process produces magmatic sulfide deposits, which are the most important sources of platinum, palladium, chromium, and several other metals. Cumulate sulfide minerals include pentlandite (Fe,Ni) 9 S 8, chalcopyrite (CuFeS 2), pyrrhotite (Fe 1-x S), and pyrite (FeS 2). ... The magmas originate at depths of 150 to 450 km, deeper than other ...

No significant deposits are associated with the margins of large oceans or with supra-subduction zone environments, possibly reflecting poor preservational potential or (with the latter) limitations to plume interaction with continental lithosphere. A craton-margin model for the genesis of magmatic Ni-Cu-PGE deposits is proposed.

Compositions of mantle-derived lavas from continental large igneous provinces and oceanic plume settings, showing estimated range of parent magma compositions for various …

We have modeled the genesis of primary mantle-derived magma to explore the controls exerted on its Ni-Cu ore potential by water content, pressure, and mantle potential temperature ( T p ). During decompression melting, Ni concentration in primary magma decreases with an increasing degree of melting, which is in contradiction to long-held understanding obtained from previous …

The formation of magmatic Ni-Cu-platinum-group element (PGE) sulfide deposits require saturation of silicate magmas in sulfide to generate immiscible sulfide droplets (Naldrett, 2004;Ripley and Li ...

Magmatic Ni-Cu ore bodies at Nunavik Nickel, like most similar deposits, are mainly composed of pyrrhotite (Fe 1-x S) and varying amounts of chalcopyrite (CuFeS 2) and pentlandite ((Fe,Ni) 9 S 8). From a geophysical point of view, these minerals are indistinguishable, and their global signatures will mostly depend on their texture (i.e ...