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ID 25451
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title alternative
Fault displacement along the Naruto-South fault, the Median Tectonic Line active fault system in the eastern part of Shikoku, southwestern Japan
creator
Takada, Keita
Nakata, Takashi
Okada, Atsumasa
Haraguchi, Tsuyoshi
Matsugi, Hiroaki
subject
中央構造線
中央構造線活断層系
鳴門南断層
変位地形
地下地質
地層抜き取り装置
Median Tectonic Line
MTL active fault system
Naruto-South fault
fault displacement
subsurface geology
Geo-Slicer
NDC
General geography. Description and travel
abstract
The Naruto-South fault is situated of about 1000m south of the Naruto fault, the Median Tectonic Line active fault system in the eastern part of Shikoku. We investigated fault topography and subsurface geology of this fault by interpretation of large scale aerial photographs, collecting borehole data and Geo-Slicer survey. The results obtained are as follows; 1) The Naruto-South fault runs on the Yoshino River deltaic plain at least 2.5 km long with fault scarplet. the Naruto-South fault is oblique by about 5-10°clockwise to the strike of the Naruto fault. 2) Geologic boundary (MTL) suggested by borehole data, extends between Himeta and Ote-Beach about 8 km long, buried under alluvial deposits. The strike and location is consistent with the Naruto-South fault and submarine fault. Therefore, the Naruto-South fault is presumed to have dislocated using the part of fault plane of the geologic boundary fault. 3) We investigated to detect marks of the last faulting event by use of Geo-Slicer, and we confirmed a active fault with lateral slip component.
journal title
活断層研究
issue
Issue 17
start page
97
end page
105
date of issued
1998-12
publisher
活断層研究会
issn
0918-1024
ncid
language
jpn
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
relation url
department
Graduate School of Letters