{"_buckets": {"deposit": "1a0461cb-577a-4fa8-8836-a7f4a5deec25"}, "_deposit": {"created_by": 17, "id": "2001821", "owner": "17", "owners": [17], "owners_ext": {"displayname": "図書情報係", "username": "repository"}, "pid": {"revision_id": 0, "type": "depid", "value": "2001821"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:02001821", "sets": ["490"]}, "author_link": [], "item_1615768549627": {"attribute_name": "出版タイプ", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_970fb48d4fbd8a85", "subitem_version_type": "VoR"}]}, "item_1629683748249": {"attribute_name": "日付", "attribute_value_mlt": [{"subitem_date_issued_datetime": "2022-01-05", "subitem_date_issued_type": "Available"}]}, "item_9_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2021", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "6", "bibliographicPageEnd": "e33", "bibliographicPageStart": "e25", "bibliographicVolumeNumber": "55", "bibliographic_titles": [{"bibliographic_title": "GEOCHEMICAL JOURNAL", "bibliographic_titleLang": "en"}]}]}, "item_9_description_4": {"attribute_name": "内容記述", "attribute_value_mlt": [{"subitem_description": "Recent studies have reported slight but definite differences in Δ^′17O between the lithosphere and hydrosphere. In the present study, we precisely and accurately quantify the Δ^′17O values of geothermal H2O and mid-ocean ridge basalt (MORB) with normalization on the VSMOW-SLAP scale to further substantiate these differences and to discuss the isotopic evolution of the hydrosphere throughout the geologic time scale. With a Δ^′17O value of -60 ± 13 × 10^-6, the Δ^′17O value of MORB is comparable with that in other silicates reported in previous studies. However, the Δ^′17O value of geothermal H2O tended to decrease from +31 × 10^-6 to -51 × 10^-6, which are the usual Δ^′17O values in meteoric water and silicates, respectively, in accordance with the 18O-enrichment. These results imply an active oxygen isotope exchange between silicates and geothermal H2O under high-temperature conditions at depth. This is supported by previous studies which report the 17O-enrichment of silicate altered by hydrothermal H2O. Considering this direct evidence for depletion of 17O, we conclude that the 17O-depleted H2O has been supplied continuously to the hydrosphere. Additionally, low-temperature interaction between the silicates and H2O besides high-temperature hydrothermal interaction must be assumed to explain the observed Δ^′17O of the terrestrial hydrosphere. We conclude that the Δ^′17O of the terrestrial hydrosphere should have been variable throughout the geologic time scale owing to the various oxygen exchange interaction between the lithosphere and hydrosphere.", "subitem_description_language": "en", "subitem_description_type": "Abstract"}]}, "item_9_publisher_32": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "日本地球化学会", "subitem_publisher_language": "ja"}]}, "item_9_relation_43": {"attribute_name": "関連情報", "attribute_value_mlt": [{"subitem_relation_type": "isVersionOf", "subitem_relation_type_id": {"subitem_relation_type_id_text": "https://doi.org/10.2343/geochemj.2.0644", "subitem_relation_type_select": "DOI"}}]}, "item_9_source_id_7": {"attribute_name": "収録物識別子", "attribute_value_mlt": [{"subitem_source_identifier": "0016-7002", "subitem_source_identifier_type": "PISSN"}]}, "item_access_right": {"attribute_name": "アクセス権", "attribute_value_mlt": [{"subitem_access_right": "open access", "subitem_access_right_uri": "http://purl.org/coar/access_right/c_abf2"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Sambuichi, Takashi", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Tsunogai, Urumu", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Kura, Kazushige", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Nakagawa, Fumiko", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Ohba, Takeshi", "creatorNameLang": "en"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "date": [{"dateType": "Available", "dateValue": "2022-01-05"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "55_2_0644.pdf", "filesize": [{"value": "187 KB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "application/pdf", "size": 187000.0, "url": {"objectType": "fulltext", "url": "https://nagoya.repo.nii.ac.jp/record/2001821/files/55_2_0644.pdf"}, "version_id": "a4b72551-b43a-4946-85ad-824542825815"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "triple oxygen isotopes", "subitem_subject_scheme": "Other"}, {"subitem_subject": "geothermal H2O", "subitem_subject_scheme": "Other"}, {"subitem_subject": "MORB", "subitem_subject_scheme": "Other"}, {"subitem_subject": "VSMOW-SLAP scale", "subitem_subject_scheme": "Other"}, {"subitem_subject": "rock-water interaction", "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", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "High-precision Δ^′17O measurements of geothermal H2O and MORB on the VSMOW-SLAP scale: evidence for active oxygen exchange between the lithosphere and hydrosphere", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "High-precision Δ^′17O measurements of geothermal H2O and MORB on the VSMOW-SLAP scale: evidence for active oxygen exchange between the lithosphere and hydrosphere", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "17", "path": ["490"], "permalink_uri": "http://hdl.handle.net/2237/0002001821", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2022-01-05"}, "publish_date": "2022-01-05", "publish_status": "0", "recid": "2001821", "relation": {}, "relation_version_is_last": true, "title": ["High-precision Δ^′17O measurements of geothermal H2O and MORB on the VSMOW-SLAP scale: evidence for active oxygen exchange between the lithosphere and hydrosphere"], "weko_shared_id": -1}