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A Key to Determine Metamorphic Grades and Major Reaction-Isograds or Isograds in Common Rocks

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

Abstract

This chapter summarizes some highlights given in previous chapters in order to provide a key for the determination of metamorphic grades and reaction-isograds. High-grade granulitic rocks diagnostic of the regional hypersthene zone are not considered here because they are treated later. Sequences of isograds are indicated by selected mineral reactions in common rocks. A more precise determination of metamorphic grade may be achieved by referring to the details presented in each relevant chapter. Earlier, in Chapter 7, arguments were given for setting up major divisions of metamorphic grade within the large P-T field of metamorphic conditions. These are very-low-grade, low-grade, mediumgrade, and high-grade. With respect to pressure the metamorphic grades have been further subdivided:

(Bang)

Keywords

Metamorphic Rock Ultramafic Rock Mafic Rock Metamorphic Grade Reaction Curve 
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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References

  1. Akella, J. and Winkler, H. G. F. 1966. Contr. Mineral. Petrol. 12: 1–12.CrossRefGoogle Scholar
  2. Althaus, E. 1967. Contr. Mineral. Petrol. 16: 29–44.CrossRefGoogle Scholar
  3. Choudhuri, A. and Winkler, H. G. F. 1967. Contr. Mineral. Petrol. 14: 239–315.CrossRefGoogle Scholar
  4. Hirschberg, A. and Winkler, H. G. F. 1968. Contr. Mineral. Petrol. 18: 17–42.CrossRefGoogle Scholar
  5. Richardson, S. W., Bell, P. M., and Gilbert, M. C. 1968. Am. J. Sci. 266: 513–541.CrossRefGoogle Scholar
  6. Richardson, S. W, Gilbert, M. C. and Bell, P. M. 1969. Am. J. Sci. 267: 259–272.CrossRefGoogle Scholar
  7. Schreyer, W. 1974. Geol. Rundschau 63: 597–609.CrossRefGoogle Scholar
  8. Schreyer, W. and Seifert, F. 1969. Am. J. Sci. 267: 371–388.CrossRefGoogle Scholar
  9. Turner, F. J. 1968. Metamorphic Petrology, McGraw-Hili Book Company, New York.Google Scholar
  10. Wenk, C. and Keller, F. 1969. Schweiz. Mineral. Petrog. Mitt. 48: 455–457.Google Scholar
  11. Winkler, H. G. F. 1967. Petrogenesis of Metamorphic Rocks. 2nd edit. SpringerVerlag, New York-Berlin.Google Scholar

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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