DIAGENETIC MODIFICATION OF CLAY MINERAL TYPES IN ARTIFICIAL SEA WATER

摘要

Analyses of samples of kaclinjtic, illitic, and montmorillonitic clay materials exposed to artificial sea water for periods of six months to five years have yielded some evidence to support the contention that chloritic and illitic clay types may ultimately develop from montmorillonitic material in the marine environment.nThe techniques of electron diffraction, electron microscopy, X-ray diffraction, and chemical analysis were employed to detect and measure the extent of modification of the clay materials at selected time inter¬vals during the five year period.nThese threads were observed to decrease or equilibrate in apparent amount within the chloritic separates as plate-like forms began to appear after three years. The illitic separates were characterized by fine granular material with increasing occurrence of larger plate-like forms as exposure time increased.