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A quantitative petrofabric characterization of metamorphic rocks

  • Tsidzi K. E. N. 
Article

Abstract

Adequate and reliable estimation of the nature of rocks is a primary requirement in engineering geology. Of crucial concern in the characterization of metamorphic rocks in particular is their intrinsic anisotropic fabric, foliation.

The degree of foliation has been assessed in terms of a proposed quantitative foliation index involving micropetrographic modal and shape factor analyses. This approach improves the accurate identification and description of metamorphic rocks and provides a reliable basis for the estimation of the behavioural aspects of rock anisotropy in engineering geology.

Keywords

Metamorphic Rock Shape Factor Cordierite Andalusite Alkali Feldspar 

Analyse structurale quantitative de roches métamorphiques

Résumè

Une appréciation correcte et fiable de la nature des roches est une nécessité première en géologie de l'Ingénieur. En ce qui concerne les roches métamorphiques, un point essentiel est leur structure intrinsèquement anisotrope, leur foliation.

Le degré de foliation a été étudié et un indice caractérisant cette foliation de manière quantitative est proposé, incluant des analyses modales micropétrographiques et un facteur de forme. Cette approche améliore la connaissance et la description des roches métamorphiques et fournit des éléments fiables pour la précision du comportement des roches anisotropes dans le domaine de la géologie de l'Ingénieur.

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Copyright information

© International Assocaition of Engineering Geology 1986

Authors and Affiliations

  • Tsidzi K. E. N. 
    • 1
  1. 1.School of MinesUniversity of Sciences and TechnologyKumasiGhana

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