2013 Fiscal Year Final Research Report
Downhole experiments for in situ state and property assessment of seismogenic processes
| Project Area | New perspective of great subduction-zone earthquakes from the super deep drilling |
|---|
| Project/Area Number |
21107006
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
|
| Allocation Type | Single-year Grants |
|---|
| Review Section |
Science and Engineering
|
|---|
| Research Institution | Japan Agency for Marine-Earth Science and Technology |
|---|
Principal Investigator |
KINOSHITA Masataka 独立行政法人海洋研究開発機構, 高知コア研究所, 所長 (50225009)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ITO Hisao 独立行政法人海洋研究開発機構, 地球深部探査センター, 技術研究統括 (10356470)
LIN Weiren 独立行政法人海洋研究開発機構, 高知コア研究所, グループリーダー (80371714)
ITO Takatoshi 東北大学, 流体科学研究所, 教授 (00184664)
KANO Yasuyuki 京都大学, 防災研究所, 助教 (30447940)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
ARAKI Eiichiro 独立行政法人海洋研究開発機構, 海洋工学センター, サブリーダー (60359130)
YAMAOKA Koshun 名古屋大学, 大学院環境学研究科, 教授 (70183118)
|
|---|
| Project Period (FY) |
2009-07-23 – 2014-03-31
|
| Keywords | 統合国際深海掘削系下記 / 南海トラフ地震発生帯掘削 / 応力場 / 間隙水圧 / 孔内計測 / 東北地方太平洋沖地震 / 熱・水理構造 / CT亀裂検出 |
|---|
| Research Abstract |
Various experiments were conducted in order to assess insitu state and property of the seismogenic processes of subduction zone earthquakes. At Nankai Trough, insitu stresses were estimated through core measurements, resistivity-image logging, hydro-fracturing, vertical seismic profiling, etc., all of which show maximum horizontal compression parallel to the plate conversion. Borehole observatory data suggest that the temperature at the mega-splay fault at 5000 m below sea floor is 130-150 degC.
At Japan Trtench, stress drop in the shallow portion was detected after the 3.11 Tohoku event. Insitu temperature monitoring at the fault zone revealed only +0.3degC increase, suggesting a very low friction (<0.1) during the fault slip. These are consistent with a large slip inferred along the shallow fault zone.
|
-
-
-
[Journal Article] Expedition 343, 343T, and KR13-08 Scientists(2013)Low Coseismic Friction on the Tohoku-Oki Fault Determined from Temperature Measurements2013
Author(s)
Fulton, P.M., E. E. Brodsky, Y. Kano, J. Mori, F. Chester, T. Ishikawa, R. N. Harris, W. Lin, N. Eguchi, S. Toczko
-
Journal Title
Science
Volume: 342
Pages: 1214
DOI
Peer Reviewed
-
-
[Journal Article] Determination of Stress State in Deep Subsea Formation by Combination of Hydraulic Fracturing In-situ Test and Core Analysis -A Case Study in the IODP Expedition 319-2013
Author(s)
Ito, T., A. Funato, W. Lin, M-L., Doan, D. Boutt, Y. Kano, H. Ito, D. Saffer, L. McNeill, T. Byrne, K. Moe
-
Journal Title
J. Geophys. Res
Volume: 118
Pages: 1203-1215
DOI
Peer Reviewed
-
[Journal Article] Continuous Permeability Measurements Record Healing Inside the Wenchuan Earthquake Fault Zone2013
Author(s)
Xue, L., H.-B. Li, E. E. Brodsky, Z.-Q. Xu, Y. Kano, H. Wang, J. J. Mori, J.-L. Si, J.-L. Pei, W. Zhang, G. Yang, Z.-M. Sun, and Y. Huang
-
Journal Title
Science
Volume: 340
Pages: 1555-1559
DOI
Peer Reviewed
-
-
[Journal Article] Tsunamigenic potential of the shallow subduction plate boundary inferred from slow seismic slip2012
Author(s)
Sugioka, H., T. Okamoto, T. Nakamura, Y. Ishihara, A. Ito, K. Obana, M. Kinoshita, K. Nakahigashi, M. Shinohara, and Y. Fukao
-
Journal Title
DOI
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
