Computer Science
Scientific paper
Nov 1972
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972esrv....8..303m&link_type=abstract
Earth Science Reviews, Volume 8, Issue 3, p. 303-321.
Computer Science
3
Scientific paper
The microstructure of clay sediments has been of minor interest to geologists until very recently. Many of the major advances in the study of clay fabric have been provided not by sedimentologists or petrologists but by workers in the fields of soil mechanics, pedology, ceramics and colloid chemistry, and although the findings are not always directly applicable to clay sediments they have proved extremely useful. A review of the theories of microstructure past and present has been prepared and it has emerged that, probably due to the almost insuperable difficulties associated with sampling, there have been certain misconceptions regarding what is meant by a freshly deposited sediment. In this review the structure of a fresh clay is described and an attempt has been made to explain it. Microstructural changes produced by compaction are discussed and it appears that single, discrete particles are of little importance in clay sediments either fresh or compacted, but rather that the particles are organised into domains of a varying number of oriented clay particles. This concept is incorporated into the study of the development of fissility in shales in which it appears that a fissile nature in argillaceous rocks is more a function of the chemistry of the depositional medium than of overburden pressure. In the light of previous investigations an attempt has been made to produce a revised system of classification of particle association in fresh and compacted clay sediments.
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