Applicability of helicopter magnetic prospecting to the landslide area on the rim area of Toga-Graben
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- SUGIMOTO Toshihide
- Mlit Hokuriku Regional Development Bureau, River Department, Nigata, Japan
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- NOZAKI Tamotu
- Nozaki EG Consulting
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- SAKAI Hideo
- University of Toyama, Division of Earth And Environmental Systemsl, Toyama, Japan
Bibliographic Information
- Other Title
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- 利賀地溝帯縁辺部の地すべり地域における空中磁器探査の適用性
- 利賀地溝帯縁辺部の地すべり地域における空中磁気探査の適用性
- リガチコウタイ エンペンブ ノ ジスベリ チイキ ニ オケル クウチュウ ジキ タンサ ノ テキヨウセイ
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Abstract
The air-borne magnetic surveys are reported to determine the distribution of susceptible layers to landslide in the southwestern Toyama, including the boundary between the Hida belt and the green tuff region. The results show the strong magnetic anomaly for the igneous rocks but the weak magnetic anomaly for the hydrothermal alternation zone or thick colluvial deposits that are susceptible to landslide, and therefore determine the landslide areas in the Funatsu granitic rocks and the colluvial deposits in the Neogene formations. Further, there is a strong positive correlation between the boundary of the anomalies and the group of faults that divide granitic rocks and Neogene formation in the area. The air-borne magnetic survey is not affected by small variation such as intrusive rocks due to its relatively low resolution of less than several meters, suggesting that this technique could be a powerful tool for the first screening survey for the susceptible layers to landslide, although the magnetic properties of the regional rocks have to be clarified in advance.
Journal
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- Journal of the Japan Society of Erosion Control Engineering
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Journal of the Japan Society of Erosion Control Engineering 66 (1), 23-29, 2013
Japan Society of Erosion Control Engineering
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Details 詳細情報について
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- CRID
- 1390001205480043264
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- NII Article ID
- 10031174602
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- NII Book ID
- AN0012035X
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- ISSN
- 21874654
- 02868385
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- NDL BIB ID
- 024758614
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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