{"_buckets": {"deposit": "ef04b00b-3c40-41ed-87e5-43e841e8f4f8"}, "_deposit": {"id": "32796", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "32796"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00032796", "sets": []}, "author_link": ["127606", "127605"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "DELP1987\u5e74\u5ea6\u5c0f\u7b20\u539f\u6d77\u57df\u822a\u6d77\u5831\u544a : I : \u6982\u8aac"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1989-09-30", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "2", "bibliographicPageEnd": "131", "bibliographicPageStart": "119", "bibliographicVolumeNumber": "64", "bibliographic_titles": [{"bibliographic_title": "\u6771\u4eac\u5927\u5b78\u5730\u9707\u7814\u7a76\u6240\u5f59\u5831 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]}, "item_4_description_13": {"attribute_name": "\u30d5\u30a9\u30fc\u30de\u30c3\u30c8", "attribute_value_mlt": [{"subitem_description": "application/pdf", "subitem_description_type": "Other"}]}, "item_4_description_5": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "Late in the fall of 1987, as a part of the Japanese National Research Program (DELP/Dynamics and Evolution of the Lithosphere Program : Japanese title of ILP) a geophysical and geological research cruise (DELP-87 cruise by two vessels) was carried out in the western margin of the Pacific and the Ogasawara (Bonin) Trough area, one of the back-arc basins in the western part of the Pacific. It is suggested through the present and past studies that the trough has been formed as a result of differential rifting and subsequent opening of the Parece Vela and Shikoku Basins in the middle Tertiary. The crustal structure of the trough is basically similar to those of other part of the Izu-Ogasawara system but it represents a consequence of tectonic stretching. Therefore, the horizontal stress field of the trough area between ca. 50 and 20 Ma may have been extensional. A conspicuous feature of the world\u0027s highest gravity anomaly associated with the existence of a large Boninite mass around the Ogasawara Ridge in the eastern part of the trough must be supported by some dynamic uplifting force if not a compressive horizontal stress field.", "subitem_description_type": "Abstract"}, {"subitem_description": 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"item_title": "Report on DELP 1987 Cruises in the Ogasawara Area : Part I : General Outline", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "Report on DELP 1987 Cruises in the Ogasawara Area : Part I : General Outline", "subitem_title_language": "en"}]}, "item_type_id": "4", "owner": "1", "path": ["80/4535/4737/4743", "9/504/4538/4739/4744"], "permalink_uri": "https://doi.org/10.15083/0000032796", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-05-30"}, "publish_date": "2008-05-30", "publish_status": "0", "recid": "32796", "relation": {}, "relation_version_is_last": true, "title": ["Report on DELP 1987 Cruises in the Ogasawara Area : Part I : General Outline"], "weko_shared_id": -1}