Migmatites pp 86-144 | Cite as

Phase equilibria in partial melting of pelitic rocks

  • James A. Grant


Melting of rocks is a logical extension of normal high-grade metamorphism and there is no question that it occurs: magma exists. Many petrologists ascribe the origins of many migmatites to partial melting with segregation of solids from liquid. However, it is by no means axiomatic that all migmatites are formed essentially by this process. As we have been recently reminded by Olsen (1983), partial melting, metamorphic differentiation, injection or metasomatism are all still processes possible in the formation of migmatites, and more than one of these may be involved in the formation of a given migmatite (e.g. Johannes, 1983).


Fluid Inclusion Partial Melting Univariant Equilibrium Liquid Composition Invariant Point 
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© Blackie & Son Ltd 1985

Authors and Affiliations

  • James A. Grant
    • 1
  1. 1.Department of GeologyUniversity of MinnesotaDuluthUSA

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