Magmatic Segregation Mineral Deposits

Magmatic segregation can also take place as a result of the separation of sulphide and silicate liquids. Sulphide and silicate liquids are immiscible meaning they do not mix, so droplets of iron, copper, nickel and platinum sulphides that form at high temperatures and are denser than the surrounding silicate liquid (magma) sink to the base of the intrusion to form a cumulate layer, where they ...

Get Price

deposit of copper ore by magmatic concentration process. Mineral Resources (Chapter 21) This process is called fractionation or magmatic segregation 2 Some ore deposits are formed by magmatic segregation a Iron deposits of Kiruna An example of such a deposit is the porphyry copper deposit so important Check price [Live Online]

Get Price

Nickel deposits of the United States-----36 Alaska-----36 ... which the hydrosilicate garnierite is the principal nickel mineral. These deposits contain more than 1.5 percent nickel. Large deposits of ... Some geologists favor the theory of magmatic segregation, that …

Get Price

Mantle-derived magmas and magmatic Ni-Cu-(PGE) deposits N.T. Arndt1, C.M. Lesher2 and G.K. Czamanske3 1 – LGCA, University Joseph Fourier, 1381 rue de la Piscine, 38401 Grenoble, France, [email protected] 2 - Mineral Exploration Research Centre, Department of Earth Sciences, Laurentian University, ... generation or segregation of an ...

Get Price

The segregation may take place by the sinking of heavy early formed crystals to the lower part of the magma chamber, by marginal accumulation, or by constrictional flowage, The mineral deposits formed by early magmatic segregation are generally lenticular of relatively small size.

Get Price

In the previous chapter we have described some of the mineral deposits that have formed by magmatic activity, often by segregation within the magma chamber itself. In this chapter we turn our attention to other magmatic activity which results in important mineral deposits.

Get Price

Ore Deposits Related to Magmatic Activity magmatic segregation mineral deposits &#; Ore Deposits Related to Magmatic Activity. Certain accessory or uncommon constituents of magmas become enriched into bodies of sufficient size and richness to constitute valuable mineral deposits eg.

Get Price

Definition of magmatic segregation. Concentration of crystals of a particular mineral (or minerals) in certain parts of a magma during its cooling and crystallization. Some ore deposits (i.e., magmatic ore deposits) are formed in this way. See Also: differentiation.

Get Price

Mineral Resources . Background . Mineral resources in the Bristol Bay planning area include metallic base, precious, platinum-group, rare earth, and the industrial rocks and minerals. The minerals occur in a wide range of deposit types. The metallic mineral deposits can be divided into placers and lodes.

Get Price

The igneous processes are magmatic segregation, late stage crystallization, and hydrothermal fluids. The sedimentary processes are clastic deposits , like placer deposits , and chemical precipitates .

Get Price

Abstract. 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.

Get Price

Sedimentary deposits. Magmatic Segregation. Magmatic Segregation, or separation and concentration of the ore from the cooling, crystallizing rock magma, has taken place where the magma has pushed its way upward and formed large masses (laccoliths, etc.) at sufficient depths to …

Get Price

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. Rocks formed as a result of magmatic segregation are called magmatic cumulates.

Get Price

Magmatic Base Metals Deposits Chrome - Nickel/Copper - Platinum Group Metals (PGM) Magmatic Deposits are so named because they are genetically linked with the evolution of magmas emplaced into the crust (either continental or oceanic) and are spatially found within rock types derived from the crystallization of such magmas.

Get Price

15 A large proportion of ores in magmatic sulfide deposits consist of mixtures of cumulus 16 silicate minerals, sulfide liquid and silicate melt, with characteristic textural relationships that ... segregation of S-bearing metal melts in meteorites and hence the formation ... 126 Discrete sulfide mineral aggregates in magmatic sulfide ores (or ...

Get Price

aid in understanding how layered deposits form, but where differential pressures exist, liquid injection is more likely toform podiform deposits. ŁKind of deposits ŁAlmost all chromite deposits are magmatic segregation in ultrabasic rocks. Chromite occurs in the host rock as masses, lenses, and dissemination.

Get Price

Review Quiz. Which is NOT a major limitation in predicting future mineral resource costs and availability? a. Inability to predict new discoveries of major mineral resources and reserves ... c. Magmatic segregation and mantle convection d. Hydrothermal activity and fluid enrichment of magmas ... Mineral deposits are renewable, and fossil fuels ...

Get Price

In 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. Rocks formed as a result of magmatic segregation are called magmatic cumulates. While a magma may start… Read More

Get Price

Ore Deposits Related to Magmatic Activity. Certain accessory or uncommon constituents of magmas become enriched into bodies of sufficient size and richness to constitute valuable mineral deposits eg. Chromite and platinum. Magmatic ore deposits are characterized by their close relationship with intermediate or deep seated intrusive igneous rocks.

Get Price

The property hosts the Sunday Lake Intrusion, which is part of the Proterozoic Mid-Continental Rift magmatic event that produced the Eagle nickel deposit in Michigan (Lundin Mining) and the Tamarack (Rio Tinto Talon Resources) and Duluth Complex (Antofagasta PLC) magmatic sulphide deposits …

Get Price

magmatic-segregation deposit. Quick Reference. Concentration of particular minerals in different parts of a magma chamber during consolidation, by gravity settling, filter pressing, flow, fractional crystallization, liquid immiscibility, or gas transference; for example, the accumulation of heavy minerals such as chromite and magnetite by ...

Get Price

forming processes. The development of mineral deposit models is therefore an iterative process. Kambalda-type nickel sulfide deposits provide a useful illustration of the relationship among the three kinds of deposit models. Models of the process of magmatic segregation suggest that the sulfide ores formed by batch segregation and that the

Get Price

Mineral deposits formed due to the verious processes associated with magmatic activities are called ‘Primary-Mineral Deposits’. These are also called ‘hypogene-deposits’ Mineral deposits arising out of the processes of weathering, and activities of several geological agents are called ‘Secondary Mineral Deposits’.

Get Price

Complexes segregated via magmatic processes and was subsequently modified by hydrothermal processes. References Barnes, S.-J., and Maier, W.D., 1999, The fractionation of Ni, Cu, and the noble metals in silicate and sulphide liquids in Dynamic Processes in Magmatic Ore Deposits and their Application to Mineral Exploration, GAC Short Course ...

Get Price

Ore deposits produced by magmatic segregation, with special reference to the nickel ores of the Sudbury district, Ontario Stuart St.Clair State University of Iowa This work has been identified with aCreative Commons Public Domain Mark 1.0. Material in the public domain. No restrictions on use.

Get Price

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 …

Get Price

Second, during the crystallization of magma valuable minerals may form earlier than others and sink to the bottom of the magma reservoir, forming early magmatic deposits. These deposits are also called segregation or accumulative deposits (chromium, titanium, and iron deposits).

Get Price

Epithermal mineral ore deposits are formed at low temperatures (50-200 °C) near the Earth's surface (<1500 m), that fill veins, breccias, and stockworks. Telethermal mineral ore deposit are formed at shallow depth and relatively low temperatures, with little or no wall-rock alteration, presumably far from the source of hydrothermal solutions.

Get Price

Segregation deposits:- Early magmatic segregation deposits are formed as a result of gravitation crystallization differentiation. In such cases, the ore minerals which crystallize early, get concentrated in a particular part of the igneous mass the ore deposits thus formed are called “Segregation deposits”.

Get Price

Jan 10, 2017· Economic geology - Magmatic ore deposits_1 1. Prepared by: Dr. Abdel Monem Soltan Ph.D. Ain Shams University, Egypt 2. Economic Geology Principles and Practice Metals, Minerals, Coal and Hydrocarbons – Introduction to Formation and Sustainable Exploitation of Mineral Deposits, Walter L. Pohl ©2011 Walter L. Pohl. Published 2011 by Blackwell Publishing Ltd.

Get Price