{"created":"2021-03-01T06:51:30.540265+00:00","id":32798,"links":{},"metadata":{"_buckets":{"deposit":"23155d1e-2704-4965-a66a-693280f2b2c7"},"_deposit":{"id":"32798","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"32798"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00032798","sets":["80:4535:4737:4743","9:504:4538:4739:4744"]},"author_link":["127628","127629","127630","127631","127632","127633","127634","127635","127636","127619","127620","127621","127622","127623","127624","127625","127626","127627"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"DELP1987年度小笠原海域航海報告 : III : エアガン-ハイドロフォン付海底地震計による屈折法地殻構造探査"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1989-09-30","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"162","bibliographicPageStart":"149","bibliographicVolumeNumber":"64","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":"A refraction experiment using five sets of OBSH as receivers and an airgun as an artificial energy source was carried out to clarify the fine crustal structure in the Ogasawara Trough. The P (longitudinal) wave velocity structure of the sediments in the trough was determined. The structure model for the sediments consists of two layers, the upper layer with P wave velocity (Vp) of 1.8-2.2 km/s and the lower layer with Vp of 3.6-4.1 km/s. Although the entire thickness of the sediments decreases gradually from 5.5 km to 3.6 km toward the east, the upper layer shows an abrupt change in thickness at around the center of the trough, revealing discontinuity of the sedimentary structure from west to east. There is a bumpy unevenness of the interface underlying the sediments also in the central part of the trough. The location of this bump corresponds to the place where a fault-like dislocation structure is found by the multi-channel seismic reflection survey.","subitem_description_type":"Abstract"},{"subitem_description":"小笠原トラフ下の地殻精密構造を調べるために,5台のハイドロフォソ付海底地震計とエアガンを用いた屈折法地震探査を行なった.エアガンの測線はトラフ軸に直交する東西の測線(測線長130km)で,エアガンを約100-180mおきに高密度でショットさせることにより,トラフ軸を横切る方向の構造の変化をとらえることができた.小笠原トラフ下の堆積層は2層からなる速度構造をもっており,全体の厚さは東に向かって5.5-3.6kmと徐々に薄くなっている.最上部堆積層のP波速度は1.8-2.2km/s,その下の層のP波速度は3.6-4.1km/sである.最上部堆積層の厚さはトラフのほぼ中央で急激に東側にむかって厚くなっていて,トラフ内の堆積構造は東西で異なっている.トラフの中央部ではこれらの堆積層の下側の境界面が平旦でないことがPmPの走時から示され,このことはマルチ・チャンネル反射探査で音響基盤に認められた断層の存在と調和的である.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"127628","nameIdentifierScheme":"WEKO"}],"names":[{"name":"日野, 亮太"}]},{"nameIdentifiers":[{"nameIdentifier":"127629","nameIdentifierScheme":"WEKO"}],"names":[{"name":"西澤, あずさ"}]},{"nameIdentifiers":[{"nameIdentifier":"127630","nameIdentifierScheme":"WEKO"}],"names":[{"name":"末広, 潔"}]},{"nameIdentifiers":[{"nameIdentifier":"127631","nameIdentifierScheme":"WEKO"}],"names":[{"name":"木下, 肇"}]},{"nameIdentifiers":[{"nameIdentifier":"127632","nameIdentifierScheme":"WEKO"}],"names":[{"name":"阿部, 信太郎"}]},{"nameIdentifiers":[{"nameIdentifier":"127633","nameIdentifierScheme":"WEKO"}],"names":[{"name":"大内, 徹"}]},{"nameIdentifiers":[{"nameIdentifier":"127634","nameIdentifierScheme":"WEKO"}],"names":[{"name":"久保, 篤規"}]},{"nameIdentifiers":[{"nameIdentifier":"127635","nameIdentifierScheme":"WEKO"}],"names":[{"name":"是沢, 定之"}]},{"nameIdentifiers":[{"nameIdentifier":"127636","nameIdentifierScheme":"WEKO"}],"names":[{"name":"南雲, 昭三郎"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000032798","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_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Hino, Ryota"}],"nameIdentifiers":[{"nameIdentifier":"127619","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nishizawa, Azusa"}],"nameIdentifiers":[{"nameIdentifier":"127620","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Suyehiro, Kiyoshi"}],"nameIdentifiers":[{"nameIdentifier":"127621","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kinoshita, Hajimu"}],"nameIdentifiers":[{"nameIdentifier":"127622","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Abe, Shintaro"}],"nameIdentifiers":[{"nameIdentifier":"127623","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ouchi, Toru"}],"nameIdentifiers":[{"nameIdentifier":"127624","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kubo, Atsuki"}],"nameIdentifiers":[{"nameIdentifier":"127625","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Koresawa, Sadayuki"}],"nameIdentifiers":[{"nameIdentifier":"127626","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nagumo, Shozaburo"}],"nameIdentifiers":[{"nameIdentifier":"127627","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":"ji0642003.pdf","filesize":[{"value":"1.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0642003.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/32798/files/ji0642003.pdf"},"version_id":"810cace0-eb8c-4874-9b74-5acb209b588b"}]},"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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Track Line"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T05:17:29.915736+00:00"}