Regional Hypersthene Zone (Granolite High-Grade)

  • Helmut G. F. Winkler
Part of the Springer Study Edition book series (SSE)

Abstract

As pointed out in Chapter 7 (p. 88f), a distinction must be made in high-grade metamorphism between two situations: (1) water pressure being approximately equal to load pressure, or (2) considerably less than load pressure. in the latter case and at medium to high load pressure, rocks called granulites are formed (the granulite facies is developed). Since hypersthene is the most diagnostic mineral in both mafic and acidic granulites, it is suggested that granulite high-grade metamorphism be designated as the “regional hypersthene zone.” This is in contrast to the low pressure, contact metamorphic high-grade zone, where ortho-pyroxene is also present in rocks of appropriate composition.

Keywords

Metamorphic Rock Mineral Assemblage Mafic Rock Alkali Feldspar Granulite Facies 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • Helmut G. F. Winkler
    • 1
  1. 1.Institute of Mineralogy and PetrologyUniversity of GöttingenFederal Republic of Germany

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