{"created":"2021-03-01T06:51:30.605615+00:00","id":32799,"links":{},"metadata":{"_buckets":{"deposit":"635c6d6f-4f29-4a71-a9ef-1ca3f75deaa7"},"_deposit":{"id":"32799","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"32799"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00032799","sets":["80:4535:4737:4743","9:504:4538:4739:4744"]},"author_link":["127650","127651","127652","127653","127654","127655","127656","127657","127658","127659","127660","127661","127637","127638","127639","127640","127641","127642","127643","127644","127645","127646","127647","127648","127649"],"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 : VI 発破による地震波速度構造探査"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1989-09-30","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"177","bibliographicPageStart":"163","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":"The seismic velocity structure of lower crust and uppermost mantle along two track lines in the Ogasawara Trough were obtained by refraction experiments during DELP 1987 cruises. Seismic refraction surveys were carried out by using sixteen Ocean Bottom Seismographs combined with dynamite explosives. The crust of the trough consists of three or four layers. The top layer is about 2 km thick with P- wave velocity (Vp) of 2.0km/s, and the second layer about 2 km thick with Vp of 3.6km/s. The lower crust is about 10 km thick with average Vp of 6.3 km/s. The Moho depth is about 18 km in the northern part and about 20 km in the southern part of the trough below the sea surface. The Vp of the uppermost mantle is about 7.8- 7.9 km/s and seems to be isotropic. The gravity anomaly pattern around the Ogasawara Trough is in good accordance with the seismic velocity structure.","subitem_description_type":"Abstract"},{"subitem_description":"DELP1987航海では小笠原トラフにおいて屈折法探査実験が行われ,2つの直交する測線に沿った地殻および上部マントル地震波速度構造が求められた.この探査には海底地震計とダイナマイト発破とを組み合わせて用いた.小笠原トラフの地殻は3ないし4層からたっている.最上層はP波速度(Vp)2.0 km/secで厚さ約2km,第2層はVp3.6km/sで厚さ2kmである.下部地殻は厚さ約10kmでその平均的なP波速度は6.3km/sである.モホ面の深さはトラフ中央部で海面下約17kmで,東に向かって上昇し,南にむかって下降している.最上部マントルの速度は7.8-7.9km/sで等方的であると思われる.地震波速度構造は小笠原トラフ周辺のフリーエア重力異常分布と整合的である.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"127650","nameIdentifierScheme":"WEKO"}],"names":[{"name":"片尾, 浩"}]},{"nameIdentifiers":[{"nameIdentifier":"127651","nameIdentifierScheme":"WEKO"}],"names":[{"name":"南雲, 昭三郎"}]},{"nameIdentifiers":[{"nameIdentifier":"127652","nameIdentifierScheme":"WEKO"}],"names":[{"name":"是沢, 定之"}]},{"nameIdentifiers":[{"nameIdentifier":"127653","nameIdentifierScheme":"WEKO"}],"names":[{"name":"日野, 亮太"}]},{"nameIdentifiers":[{"nameIdentifier":"127654","nameIdentifierScheme":"WEKO"}],"names":[{"name":"西沢, あずさ"}]},{"nameIdentifiers":[{"nameIdentifier":"127655","nameIdentifierScheme":"WEKO"}],"names":[{"name":"大内, 徹"}]},{"nameIdentifiers":[{"nameIdentifier":"127656","nameIdentifierScheme":"WEKO"}],"names":[{"name":"久保, 篤規"}]},{"nameIdentifiers":[{"nameIdentifier":"127657","nameIdentifierScheme":"WEKO"}],"names":[{"name":"末広, 潔"}]},{"nameIdentifiers":[{"nameIdentifier":"127658","nameIdentifierScheme":"WEKO"}],"names":[{"name":"石橋, 正和"}]},{"nameIdentifiers":[{"nameIdentifier":"127659","nameIdentifierScheme":"WEKO"}],"names":[{"name":"小野, 祐一郎"}]},{"nameIdentifiers":[{"nameIdentifier":"127660","nameIdentifierScheme":"WEKO"}],"names":[{"name":"木下, 肇"}]},{"nameIdentifiers":[{"nameIdentifier":"127661","nameIdentifierScheme":"WEKO"}],"names":[{"name":"馬場, 久紀"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000032799","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":"東京大学地震研究所"},{"subitem_text_value":"東北大学理学部地震・噴火予知センター"},{"subitem_text_value":"神戸大学理学部地球科学"},{"subitem_text_value":"千葉大学理学部地学科"},{"subitem_text_value":"東海大学海洋学部海洋資源学科"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Katao, Hiroshi"}],"nameIdentifiers":[{"nameIdentifier":"127637","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hino, Ryota"}],"nameIdentifiers":[{"nameIdentifier":"127638","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nagumo, Shozaburo"}],"nameIdentifiers":[{"nameIdentifier":"127639","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Koresawa, Sadayuki"}],"nameIdentifiers":[{"nameIdentifier":"127640","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nishizawa, 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