Ground penetrating radar profiling across the Kamishiro fault in the Itoigawa-Shizuoka tectonic line active fault system, central Japan
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- Kimura Haruo
- Geological Survey of Japan, AIST Present: Central Research Institute of Electric Power Industry
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- Nakanishi Toshimichi
- Geochemical Analysis Center, Korea Institute of Geoscience and Mineral Resources
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- Maruyama Tadashi
- Geological Survey of Japan, AIST
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- Ando Ryosuke
- Geological Survey of Japan, AIST
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- Horikawa Haruo
- Geological Survey of Japan, AIST
Bibliographic Information
- Other Title
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- 糸魚川-静岡構造線活断層系神城断層における地中レーダー探査
- イトイガワ-シズオカ コウゾウセンカツダンソウケイシンジョウ ダンソウ ニ オケル チチュウ レーダー タンサ
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Abstract
The Itoigawa-Shizuoka tectonic line (ISTL), which is located between the NE and SW Japan arcs, is one of the most major tectonic lines in Japan. The N-S trending Kamishiro fault located in the northern part of the ISTL active fault system is an east dipping reverse fault. Near the southern part of the fault, the alluvial fan formed by a river flowing toward the southeast is tilted to the west by faulting. To reveal shallow subsurface deformation structure above a depth of 5 m, we carried out ground penetrating radar (GPR) profiling along two survey lines, whose lengths are 50 m and 130 m, respectively, across the fault. The GPR data was collected by common-offset modes using the control unit SIR-3000 (Geophysical Survey System Inc.) and the 200 MHz antenna Model-5106(Geophysical Survey System Inc.), and the station spacing was 0.01 m. The depth converted GPR sections after careful data processing are very concordant with the geological section based on drilling and trenching surveys conducted near the GPR survey. The GPR sections show deformation structure of the fan deposits in detail. The vertical displacement of the top of the fan gravel deformed by the Kamishiro fault is over 3.0 m during the last faulting event.
Journal
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- Active Fault Research
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Active Fault Research 2013 (38), 1-16, 2013
Japanese Society for Active Fault Studies
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Keywords
Details 詳細情報について
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- CRID
- 1390282680733104384
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- NII Article ID
- 130005143519
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- NII Book ID
- AN10157356
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- ISSN
- 21865337
- 09181024
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- NDL BIB ID
- 024755538
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed