Burial Metamorphism

  • Helmut G. F. Winkler

Abstract

As contrasted with the dynamothermal metamorphism genetically connected with orogenesis, no additional thermal energy was supplied, no “thermal domes” were ever set up in course of a burial metamorphism. The rock formations accumulating in a geosynclinal basin gradually subsided to so profound a depth, that the temperatures realized there sufficed to bring about reactions between the minerals of the sediments. No high temperatures were set up, yet the temperatures reached a magnitude in which certain minerals of the sedimentary assemblages became unstable and entered into reaction with each other, that is, the sediments underwent metamorphism. While the sediments, deposited at a temperature significantly lower than that during the subsequent metamorphism, suffer a prograde change, the volcanic rocks intercalated between them, having originated at essentially higher temperatures, undergo a retrogressive alteration. The mineral constituents of these rocks are of course also unstable under the conditions of deposition in a basin, however, it is only the relatively higher temperatures of deep burial that raise the velocity of reactions to such an extent that the minerals and the glassy components react more or less completely to give rise to mineral assemblages stable under the P-T conditions of the new environment.

Keywords

Quartz Zeolite Calcite Petrol Montmorillonite 

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Copyright information

© Springer-Verlag OHG. in Berlin, Göttingen, Heidelberg 1933

Authors and Affiliations

  • Helmut G. F. Winkler
    • 1
  1. 1.Department of Mineralogy and PetrologyUniversity of GöttingenGermany

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