活断層トレンチにおける透過X線を用いた断層面の観察手法

X-radiography of faults in the trenching study of active faults

佐藤 比呂志

奥村 晃史

石丸 恒存

活断層研究

To determine paleoseismic events from trench walls of active faults, precise observation of displaced horizon by fault are very important. However, fault traces in humic soil and peat are sometimes very difficult to detect. X-radiography was used to identify the fault plane in the samples from the Kamishiro trench across the Itoigawa-Shizuoka Tectonic Line.

The fault which is hardly identified on the eyes was succesfully identified by X-radiography. We described the detailed sampling method and condition of X-radiography. X-radiography is useful tool for the precise determination of paleoseismic event form trench walls.

透過X線

トレンチ調査

活断層

断層面

神城断層

X-radiography

trenching survey

active fault

fault plane

Kamishiro fault

地球科学・地学・地質学 [ 450 ]

日本語

活断層研究会

[ISSN] 0918-1024

[NCID] AN10157356

[URI] http://topo.earth.chiba-u.jp/afr/index.htm