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The Paragenesis of Kyanite-amphibolites (With Plate XX.)

Published online by Cambridge University Press:  14 March 2018

C. E. Tilley  and
H. C. G. Vincent
C. E. Tilley
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
H. C. G. Vincent
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
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Extract

In an earlier paper the writer has discussed the paragenesis - kyanite-omphacite as observed in certain ec|ogites. The fate of this association under conditions of retrograde metamorphism has led to a consideration of rocks showing the paragenesis amphibole-kyanite, a point which is briefly taken up in the present communication. Rocks containing this latter assemblage include two groups, the one better known, of sedimentary origin, the other essentially igneous in origin.

Here are included members of the para-amphibolites, biotite-hornblende- schists, and hornblende-Garbenschiefer derived from sediments of the character of calcareous and dolomitic shales. The best-known examples come from the Alps—particularly the Triassic and pre- Triassic sediments on the south side of the St. Gotthard massif.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 24 , Issue 158 , September 1937 , pp. 555 - 568
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1937

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