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Report on DELP 1989 Cruise in the TTT Junction Areas : Part 2: Upper Crustal Structure Near the Trench-Trench-Trench Triple Junction off the Boso Peninsula, Japan
https://doi.org/10.15083/0000032727
https://doi.org/10.15083/0000032727e4bb236d-15af-40c7-a875-98f501fcb5b1
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ji0674004.pdf (6.2 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-10-13 | |||||
| タイトル | ||||||
| タイトル | Report on DELP 1989 Cruise in the TTT Junction Areas : Part 2: Upper Crustal Structure Near the Trench-Trench-Trench Triple Junction off the Boso Peninsula, Japan | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | departmental bulletin paper | |||||
| ID登録 | ||||||
| ID登録 | 10.15083/0000032727 | |||||
| ID登録タイプ | JaLC | |||||
| その他のタイトル | ||||||
| その他のタイトル | 1989年度DELP海溝三重会合点海域調査研究航海報告 : 第2部:房総沖海溝三重会合点付近の上部地殻構造 | |||||
| 著者 |
Hirata, Naoshi
× Hirata, Naoshi× Takahashi, Narumi× Amishiki, Toshiyuki× Katao, Hiroshi× Kaiho, Yuka× Kashiwabara, Shizuo× Hino, Ryota× Baba, Hisatoshi× Shiobara, Hajime× Koresawa, Sadayuki× Shinohara, Masanao× Kubo, Atsuki× Kanazawa, Toshihiko× Kasahara, Jun |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127102 | |||||
| 姓名 | 平田, 直 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127103 | |||||
| 姓名 | 高橋, 成実 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127104 | |||||
| 姓名 | 網敷, 俊志 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127105 | |||||
| 姓名 | 篠原, 雅尚 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127106 | |||||
| 姓名 | 木下, 肇 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127107 | |||||
| 姓名 | 笠原, 順三 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127108 | |||||
| 姓名 | 是沢, 定之 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127109 | |||||
| 姓名 | 片尾, 浩 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127110 | |||||
| 姓名 | 海宝, 由佳 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127111 | |||||
| 姓名 | 金澤, 敏彦 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127112 | |||||
| 姓名 | 塩原, 肇 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127113 | |||||
| 姓名 | 柏原, 静雄 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127114 | |||||
| 姓名 | 日野, 亮太 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127115 | |||||
| 姓名 | 馬場, 久紀 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 127116 | |||||
| 姓名 | 久保, 篤規 | |||||
| 著者所属 | ||||||
| 著者所属 | Report on DELP 1989 Cruise in the TTT Junction Areas : Part 2: Upper Crustal Structure Near the Trench-Trench-Trench Triple Junction off the Boso Peninsula, Japan | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In July 1989 twenty-two ocean bottom seismographs (OBSs) from 5 Japanese institutions were deployed in an array on the deep sea floor in the vicinity of the trench-trench-trench triple junction off the Boso Peninsula, Japan. The array is 300 km long and 80 km wide, including 3 profiles for study of crustal structure. A permanent OBS array telemetered by a cable system (Japan Meteorological Agency) was used as a part of the array. The sea floor array was complemented by five temporary land stations on the Boso Peninsula. Water depth along the seismic profile varies considerably from a few 100 m to 9000 m or more. We placed three OBSs specially designed for the very deep ocean. We conducted airgun-OBS profiling for the refraction survey. Two 16-liter airguns were fired every 40-50s spaced about 100m apart. Airgun signals were observed as far as 30-40 km from the OBS. To obtain the sedimentary and shallow crustal structure we transformed seismograms of airgun shots into the intercept time (τ)-ray parameter (p) domain and inverted them in a P-wave speed structure with depth by the τ-sum inversion method. We derived one-dimensional models for all OBSs. Both the sedimentary thickness and the P-wave speed in the sedimentary layer change along the profiles. The difference in sedimentary structure between the oceanic side of the trench axis and the continental side is evident: the sediment on the pacific plate consists of a vertically homogeneous unconsolidated layer (0.32 s-1 of vertical wave speed gradient) and a consolidated layer with a large gradient of 4.8s-1, while on the Northeast Japan plate the gradient is 0.65s-1 in the topmost and 0.8s-1 in the lower part of the sediment. | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 1989年,房総沖海溝三重会合点付近において,上部地殻を精密に求めるため,エアガン-海底地震計(OBS)を用いた地震波探査が行われた. 22台のOBSを設置して,更に,気象庁の常時観測システムのOBS4台とあわせて,計26台でアレイ観測を行った.このうち3台は, 7000mを超える深海に設置された.長さ300km,巾80kmの調査海域に, 3本のエアガンの測線(全長450km)を設けた.東西に引かれた測線では,水深が数100mから9000mまで変化している.同時に,房総半島においても臨時観測点を5箇所設けた. | |||||
| 書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 67, 号 4, p. 479-512, 発行日 1993-03-30 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00408972 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00162258 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 日本十進分類法 | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 453 | |||||
| 出版者 | ||||||
| 出版者 | 東京大学地震研究所 | |||||
| 出版者別名 | ||||||
| Earthquake Research Institute, University of Tokyo | ||||||
