2024-03-29T15:56:58Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00028051
2022-12-15T03:57:58Z
453:456
503:836:1555:1565
Origin of Na-Cl type groundwaters in the Matsunoyama landslides, Niigata Prefecture
新潟県松之山地すべり地のNa-Cl型地下水の起源
新潟県松之山地すべり地のNa-Cl型地下水の起源
渡部, 直喜
161264
大木, 靖衛
161265
佐藤, 修
161266
日下部, 実
161267
the Matsunoyama landslides
Tertiary type landslides
Na-Cl type groundwaters
the geopressured hydrotermal system
松之山地すべり地
第三紀層地すべり
Na-Cl型地下水
ジオプレッシャー型熱水系
Many landslides classified into Tertiary type landslides have occurred in the Niigata Prefecture. The Matsunoyama town located in the southwestern Niigata prefecture is typical of landslide areas. The groundwater behavior is one of the most important factors for landslide movements. There are Na-Cl type groundwaters of high concentration in several landslides including the Matsunoyama landslides. The Na-Cl type groundwaters cannot be derived from reactions between groundwater and rock forming minerals. Na-Cl type geothermal waters have developed in Niigata sedimentary basin including the Matsunoyama. These are similar to the geopressured hydrothermal system in the Gulf of Mexico, USA. The Na-Cl type groundwaters have been formed by mixing between shallow meteoric groundwaters and deep geothermal waters on the basis of geochemical analyses. This suggests the deep geothermal waters rise through fault fractures and inject into shallow groundwaters close to the slip plane of landside block.
departmental bulletin paper
新潟大学積雪地域災害研究センター
1997-03
application/pdf
新潟大学積雪地域災害研究センター研究年報
18
81
92
新潟大学積雪地域災害研究センター研究年報
AN00183327
03877892
https://niigata-u.repo.nii.ac.jp/record/28051/files/18_81-92.pdf
jpn