| Co-Investigator(Kenkyū-buntansha) |
片山 郁夫 広島大学, 先進理工系科学研究科(理), 教授 (10448235)
森 康 北九州市立自然史・歴史博物館, 自然史課, 学芸員 (20359475)
WALLIS R・Simon 東京大学, 大学院理学系研究科(理学部), 教授 (30263065)
橋本 善孝 高知大学, 教育研究部自然科学系理工学部門, 教授 (40346698)
谷川 亘 国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 主任研究員 (70435840)
堤 昭人 京都大学, 理学研究科, 准教授 (90324607)
|
|---|
| Budget Amount *help |
¥189,930,000 (Direct Cost: ¥146,100,000、Indirect Cost: ¥43,830,000)
Fiscal Year 2020: ¥27,560,000 (Direct Cost: ¥21,200,000、Indirect Cost: ¥6,360,000)
Fiscal Year 2019: ¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000)
Fiscal Year 2018: ¥33,540,000 (Direct Cost: ¥25,800,000、Indirect Cost: ¥7,740,000)
Fiscal Year 2017: ¥62,530,000 (Direct Cost: ¥48,100,000、Indirect Cost: ¥14,430,000)
Fiscal Year 2016: ¥40,560,000 (Direct Cost: ¥31,200,000、Indirect Cost: ¥9,360,000)
|
|---|
| Outline of Final Research Achievements |
We investigated the processes and mechanisms responsible for slow earthquakes using geological and experimental methods. As a result, we clarified that low-frequency earthquakes and tremor are a swarming phenomenon linked by multiple shear and tensile failures under high fluid pressure in quartz-filled shear and extension veins. We also derived the materials, frictional properties, and viscous shear mechanisms that can lead to slow slip events, and found that dehydration of hydrous minerals and chemical reactions between adjacent rocks play an important role in the generation of slow slip at elevated slip rates.
|
