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Chromite deposits frequently form close to the base of intrusions as a result of magmatic segregation.
What is Magmatic segregation ?
Any process by which one or more minerals become regionally concentrated (segregated) when a magma is cooling and crystallizing is referred to as magmatic segregation. Magmatic cumulates are rocks that resulted from magmatic segregation. Iron, granite, aluminium, diamond, chromite, and platinum are a few of the often occurring mineral deposits created by magmatic segregation. The concentration of the ore leads to the segregation of different minerals due to the varied temperatures and basicity zones that exist in magma.
What are the three magmatic processes?
Molten magma is produced by three main rock behavior crossings to the right of the green solidus line: 1) Decompression melting brought on by reducing pressure, 2) Flux melting brought on by introducing volatiles (more on this below), and 3) Heat-induced melting brought on by raising temperature. Mantle rock melting causes magma to develop. As they ascend, a little amount of the rocks start to melt (or as water is added to them). These little melt blobs travel upward and combine to form larger volumes that also move higher.
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