{"created":"2021-03-01T06:51:25.803594+00:00","id":32727,"links":{},"metadata":{"_buckets":{"deposit":"1205bf5f-a00d-46b8-a924-c2fa054b6325"},"_deposit":{"id":"32727","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"32727"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00032727","sets":["80:4535:4707:4708","9:504:4538:4709:4710"]},"author_link":["127102","127103","127104","127105","127106","127107","127108","127109","127110","127111","127112","127113","127114","127115","127116","127088","127089","127090","127091","127092","127093","127094","127095","127096","127097","127098","127099","127100","127101"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"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"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1993-03-30","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"512","bibliographicPageStart":"479","bibliographicVolumeNumber":"67","bibliographic_titles":[{"bibliographic_title":"東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]},"item_4_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"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.","subitem_description_type":"Abstract"},{"subitem_description":"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.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"127102","nameIdentifierScheme":"WEKO"}],"names":[{"name":"平田, 直"}]},{"nameIdentifiers":[{"nameIdentifier":"127103","nameIdentifierScheme":"WEKO"}],"names":[{"name":"高橋, 成実"}]},{"nameIdentifiers":[{"nameIdentifier":"127104","nameIdentifierScheme":"WEKO"}],"names":[{"name":"網敷, 俊志"}]},{"nameIdentifiers":[{"nameIdentifier":"127105","nameIdentifierScheme":"WEKO"}],"names":[{"name":"篠原, 雅尚"}]},{"nameIdentifiers":[{"nameIdentifier":"127106","nameIdentifierScheme":"WEKO"}],"names":[{"name":"木下, 肇"}]},{"nameIdentifiers":[{"nameIdentifier":"127107","nameIdentifierScheme":"WEKO"}],"names":[{"name":"笠原, 順三"}]},{"nameIdentifiers":[{"nameIdentifier":"127108","nameIdentifierScheme":"WEKO"}],"names":[{"name":"是沢, 定之"}]},{"nameIdentifiers":[{"nameIdentifier":"127109","nameIdentifierScheme":"WEKO"}],"names":[{"name":"片尾, 浩"}]},{"nameIdentifiers":[{"nameIdentifier":"127110","nameIdentifierScheme":"WEKO"}],"names":[{"name":"海宝, 由佳"}]},{"nameIdentifiers":[{"nameIdentifier":"127111","nameIdentifierScheme":"WEKO"}],"names":[{"name":"金澤, 敏彦"}]},{"nameIdentifiers":[{"nameIdentifier":"127112","nameIdentifierScheme":"WEKO"}],"names":[{"name":"塩原, 肇"}]},{"nameIdentifiers":[{"nameIdentifier":"127113","nameIdentifierScheme":"WEKO"}],"names":[{"name":"柏原, 静雄"}]},{"nameIdentifiers":[{"nameIdentifier":"127114","nameIdentifierScheme":"WEKO"}],"names":[{"name":"日野, 亮太"}]},{"nameIdentifiers":[{"nameIdentifier":"127115","nameIdentifierScheme":"WEKO"}],"names":[{"name":"馬場, 久紀"}]},{"nameIdentifiers":[{"nameIdentifier":"127116","nameIdentifierScheme":"WEKO"}],"names":[{"name":"久保, 篤規"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000032727","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学地震研究所"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162258","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00408972","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"453","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"Earthquake Research Institute, University of Tokyo"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"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"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Hirata, Naoshi"}],"nameIdentifiers":[{"nameIdentifier":"127088","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takahashi, Narumi"}],"nameIdentifiers":[{"nameIdentifier":"127089","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Amishiki, Toshiyuki"}],"nameIdentifiers":[{"nameIdentifier":"127090","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Katao, Hiroshi"}],"nameIdentifiers":[{"nameIdentifier":"127091","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kaiho, Yuka"}],"nameIdentifiers":[{"nameIdentifier":"127092","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kashiwabara, Shizuo"}],"nameIdentifiers":[{"nameIdentifier":"127093","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hino, Ryota"}],"nameIdentifiers":[{"nameIdentifier":"127094","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Baba, Hisatoshi"}],"nameIdentifiers":[{"nameIdentifier":"127095","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shiobara, Hajime"}],"nameIdentifiers":[{"nameIdentifier":"127096","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Koresawa, Sadayuki"}],"nameIdentifiers":[{"nameIdentifier":"127097","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shinohara, Masanao"}],"nameIdentifiers":[{"nameIdentifier":"127098","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kubo, Atsuki"}],"nameIdentifiers":[{"nameIdentifier":"127099","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kanazawa, Toshihiko"}],"nameIdentifiers":[{"nameIdentifier":"127100","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kasahara, Jun"}],"nameIdentifiers":[{"nameIdentifier":"127101","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-26"}],"displaytype":"detail","filename":"ji0674004.pdf","filesize":[{"value":"6.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0674004.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/32727/files/ji0674004.pdf"},"version_id":"73edd37e-74d3-4c46-a42c-908885e7442b"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin 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Japan"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T05:17:21.810138+00:00"}