断層粘土中の石英粒子の表面構造による断層活動性評価の試み(その1) : 表面構造の分類と形成過程

概要

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Surface textures of quartz grains from about 250 fault gauge samples with various types of fault in Japan are examined by means of the scanning electron microscope. It is disclosed that the surface morphology of the grains is variable, but quartz grains extracted from one fault gauge sample commonly show a type of texture different from those observe on the grains from the other samples. The surface textures observed under the microscope are tentatively classified into eight types; subconcoidal, orange peel-like, fish scale-like, moss-like, motheaten, stalactitic, pot-hole, and coral-like textures. These textures can be classified into four group of I to IV. Arranged in the order of their apparent features, it is interpreted that the progressive corrosion of quartz grains by ground water has taken place after faulting. The change of this surface feature can assist in estimating the time elapled since the last fault activity.
一般社団法人日本応用地質学会の論文
1982-03-30