{"created":"2023-07-25T09:58:38.901005+00:00","id":1777,"links":{},"metadata":{"_buckets":{"deposit":"b9e30a64-6b84-4da8-b1dd-a1289001704a"},"_deposit":{"created_by":15,"id":"1777","owners":[15],"pid":{"revision_id":0,"type":"depid","value":"1777"},"status":"published"},"_oai":{"id":"oai:oacis.repo.nii.ac.jp:00001777","sets":["187:189:389","41:391","70:392"]},"author_link":["2939","2938","2933","2936","2937","2934","2941","2935","2926","2940","2942"],"item_3_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2015-08-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"8","bibliographicPageEnd":"2742","bibliographicPageStart":"2725","bibliographicVolumeNumber":"16","bibliographic_titles":[{"bibliographic_title":"Geochemistry, Geophysics, Geosystems"}]}]},"item_3_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Bulk mineral assemblages of sediments and igneous basement rocks on the incoming Cocos Plate at the Costa Rica subduction zone are examined by X‐ray diffraction analyses on core samples. These samples are from Integrated Ocean Drilling Program Expedition 334 reference Site U1381, ∼ 5 km seaward of the trench. Drilling recovered approximately 100 m of sediment and 70 m of igneous oceanic basement. The sediment includes two lithologic units: hemipelagic clayey mud and siliceous to calcareous pelagic ooze. The hemipelagic unit is composed of clay minerals (∼50 wt.%), quartz (∼5 wt.%), plagioclase (∼5 wt.%), calcite (∼15 wt.%) and ∼30 wt.% of amorphous materials, while the pelagic unit is mostly made up of biogenic amorphous silica (∼50 wt.%) and calcite (∼50 wt.%). The igneous basement rock consists of plagioclase (∼50–60 wt.%), clinopyroxene (∼>25 wt.%), and saponite (∼15–40 wt.%). Saponite is more abundant in pillow basalt than in the massive section, reflecting the variable intensity of alteration. We estimate the total water influx of the sedimentary package is 6.9 m3/yr per m of trench length. Fluid expulsion models indicate that sediment compaction during shallow subduction causes the release of pore water while peak mineral dehydration occurs at temperatures of approximately ∼100°C, 40–30 km landward of the trench. This region is landward of the observed updip extent of seismicity. We posit that in this region the presence of subducting bathymetric relief capped by velocity weakening nannofossil chalk is more important in influencing the updip extent of seismicity than the thermal regime."}]},"item_3_description_63":{"attribute_name":"研究課題番号","attribute_value_mlt":[{"subitem_description":"15H05717"}]},"item_3_publisher_32":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"American Geophysical Union"}]},"item_3_relation_11":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.1002/2015GC005837","subitem_relation_type_select":"DOI"}}]},"item_3_relation_13":{"attribute_name":"情報源","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"Publisher's Version/PDF (OpenAccess)"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.1002/2015GC005837","subitem_relation_type_select":"DOI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"KAKEN研究課題: プレート境界断層超深度掘削・観測による南海トラフ巨大地震切迫度評価"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-15H05717/","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"研究代表者: 木村学 (東京海洋大学)"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://nrid.nii.ac.jp/ja/nrid/1000080153188/","subitem_relation_type_select":"URI"}}]},"item_3_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1525-2027","subitem_source_identifier_type":"ISSN"}]},"item_3_subject_62":{"attribute_name":"件名","attribute_value_mlt":[{"subitem_subject":"科学研究費研究成果"}]},"item_3_subject_64":{"attribute_name":"科学研究費研究課題","attribute_value_mlt":[{"subitem_subject":"プレート境界断層超深度掘削・観測による南海トラフ巨大地震切迫度評価"},{"subitem_subject":"Urgency Evaluation of the Nankai Great Earthquake and Tsunami by Scientific Ocean Drilling"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kameda, Jun"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Harris, Robert N."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Shimizu, Mayuko"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ujiie, Kohtaro"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tsutsumi, Akito"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ikehara, Minoru"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Uno, Masaoki"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yamaguchi, Asuka"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hamada, Yohei"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Namiki, Yuka"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kimura, Gaku"}],"nameIdentifiers":[{},{}]}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"CRISP","subitem_subject_scheme":"Other"},{"subitem_subject":"Costa Rica margin","subitem_subject_scheme":"Other"},{"subitem_subject":"diagenesis","subitem_subject_scheme":"Other"},{"subitem_subject":"seismicity","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":"journal article"}]},"item_title":"Hydrogeological responses to incoming materials at the erosional subduction margin, offshore Osa Peninsula, Costa Rica","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Hydrogeological responses to incoming materials at the erosional subduction margin, offshore Osa Peninsula, Costa Rica"}]},"item_type_id":"3","owner":"15","path":["389","391","392"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-06-24"},"publish_date":"2019-06-24","publish_status":"0","recid":"1777","relation_version_is_last":true,"title":["Hydrogeological responses to incoming materials at the erosional subduction margin, offshore Osa Peninsula, Costa Rica"],"weko_creator_id":"15","weko_shared_id":-1},"updated":"2023-07-25T10:43:52.620630+00:00"}