{"created":"2023-07-25T11:00:30.590858+00:00","id":2345,"links":{},"metadata":{"_buckets":{"deposit":"dc3e6d2b-4568-4ede-bf04-d49b8602c1dd"},"_deposit":{"created_by":4,"id":"2345","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"2345"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00002345","sets":["1:356:407"]},"author_link":["17389","65705"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1998-12","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"202","bibliographicPageStart":"192","bibliographicVolumeNumber":"53","bibliographic_titles":[{"bibliographic_title":"Memoirs of National Institute of Polar Research. Special issue"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kitamura, Keigo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ishikawa, Masahiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_1_description_1":{"attribute_name":"ページ属性","attribute_value_mlt":[{"subitem_description":"P(論文)","subitem_description_type":"Other"}]},"item_1_description_12":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"The Tanzawa plutonic complex, which is composed mainly of tonalite with minor quartz gabbro and gabbro, is exposed at the northern end of the Izu-Bonin island-arc. It is interpreted as exposed middle crust of the Izu-Bonin arc which was uplifted during the collision of Izu-Bonin arc with the Honshu arc in Japan. Determination of elastic wave velocity in these rocks is crucial to interpret the seismic velocity structure of the Izu-Bonin arc. Compressional-wave (Vp) and shear-wave (Vs) velocities from Tanzawa plutonic rocks were measured at 1 atm and room temperature. The P-wave and S-wave velocities are strongly dependent upon the lithology : gabbro (Vp=4.89-5.44km/s, Vs=2.49-2.86km/s), quartz gabbro (Vp=4.90-4.97km/s, Vs=2.39-2.50km/s), tonalite (Vp=4.25-4.71km/s, Vs=2.40-2.48km/s), granitic aplite (Vp=3.82km/s, Vs=2.11km/s). The Tanzawa plutonic rocks show a positive correlation between elastic-wave velocity and density, and a rough positive correlation between Vp and Vs. Theoretical Voigt-Reuss-Hill average Vp values were also calculated for tonalites, quartz gabbro and gabbros at 1.0 GPa pressure. Theoretical Vp is about 2km/s faster than measured Vp at atmospheric pressure. The measured Vp of plutonic rocks (4.25-5.44km/s) is faster than the refraction-determined P-wave velocity in 2km-thick uppermost crust (2.5-4.0km/s) of the Izu-Bonin island arc, implying that plutonic rocks are not present at 0-2km depth. Theoretical Vp values of tonalite and quartz gabbro are consistent with the velocity structure of middle crust (6.0-6.7km/s velocity). The theoretical Vp of hornblende gabbro (7.0-7.2km/s) can explain the lower crustal P-wave velocity structure (7.1-7.2km/s). The high P-wave velocity (7.2-7.3km/s) in the lowermost crust implies a high content of orthopyroxene (more than 20%).","subitem_description_type":"Other"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA00733561","subitem_source_identifier_type":"NCID"}]},"item_1_text_10":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Department of Environmental Sciences, Faculty of Education and Human Sciences, Yokohama National University"},{"subitem_text_language":"en","subitem_text_value":"Department of Environmental Sciences, Faculty of Education and Human Sciences, Yokohama National University"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1998-12-01"}],"displaytype":"detail","filename":"KJ00000012897.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000012897","url":"https://nipr.repo.nii.ac.jp/record/2345/files/KJ00000012897.pdf"},"version_id":"52d56fb3-2b0d-4bb1-aa7a-d8c8efc2e0c7"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"compressional-wave","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"shear-wave","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Poisson's ratio","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"acoustic impedance","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"island-arc","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"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 paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Rock velocities at atmospheric pressure and room temperature in Tanzawa plutonic rocks from central Japan","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Rock velocities at atmospheric pressure and room temperature in Tanzawa plutonic rocks from central Japan","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["407"],"pubdate":{"attribute_name":"公開日","attribute_value":"1998-12-01"},"publish_date":"1998-12-01","publish_status":"0","recid":"2345","relation_version_is_last":true,"title":["Rock velocities at atmospheric pressure and room temperature in Tanzawa plutonic rocks from central Japan"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:56:39.090248+00:00"}