{"_buckets": {"deposit": "bcd6efe3-386f-4732-8c0f-07687b8b3ba0"}, "_deposit": {"id": "4346", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "4346"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00004346", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2009-10"}, "bibliographicIssueNumber": "3-4", "bibliographicPageEnd": "258", "bibliographicPageStart": "247", "bibliographicVolumeNumber": "112", "bibliographic_titles": [{"bibliographic_title": "LITHOS", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "The mechanisms of continental intraplate magmatism were investigated with respect to Cenozoic basaltic shield lavas from the Changbaishan area, northeast China, using a comprehensive data set of major and trace elements, Sr, Nd, and Pb isotopic compositions, and K-Ar ages. The shield lavas show a significant variation in TiO(2) content (1-4 wt%), which exhibits a positive covariance with K(2)O and a negative covariance with SiO(2) for most samples. The compositional variation of the lavas cannot be explained solely by magma chamber processes, such as fractional crystallization and crustal assimilation, and may in part be attributed to processes in the magmatic source region. The variation in TiO(2) is considered to mainly reflect variations in the degree of partial melting of the source mantle, and the negative covariance of SiO(2) and TiO(2) suggests that lower-degree melts were produced at greater depths. On the basis of the observed negative covariance of TiO(2) with K-Ar ages in the main lavas, it would appear that magmas segregated at progressively greater depths with time, since at least 4.2 Ma. This feature cannot be explained in terms of temporal changes in the mantle potential temperature and/or bulk source composition. Instead, it appears likely that the rate of asthenosphere upwelling beneath the Changbaishan area decreased with time, whereby the melting depth gradually increased, resulting from a reduction in the heat flux from the upwelling mantle to the overlying lithosphere. The inferred deceleration of the asthenospheric mantle is considered to have been related to a change from an extensional to compressive tectonic stress regime during the late Pliocene. Our study suggests that long-term volcanic activity in the Changbaishan area will continue to decrease unless there is an increase in the upwelling rate of the asthenospheric mantle. (C) 2009 Elsevier B.V. All rights reserved.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "ELSEVIER SCIENCE BV", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1016/j.lithos.2009.02.007"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0024-4937", "subitem_source_identifier_type": "ISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Takeshi Kuritani", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Jun-Ichi Kimura", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Tsuyoshi Miyamoto", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Haiquan Wei", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Taketo Shimano", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Fukashi Maeno", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Xu Jin", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Hiromitsu Taniguchi", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_title": "Intraplate magmatism related to deceleration of upwrelling asthenospheric mantle: Implications from the Changbaishan shield basalts, northeast China", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Intraplate magmatism related to deceleration of upwrelling asthenospheric mantle: Implications from the Changbaishan shield basalts, northeast China", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4346", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "4346", "relation": {}, "relation_version_is_last": true, "title": ["Intraplate magmatism related to deceleration of upwrelling asthenospheric mantle: Implications from the Changbaishan shield basalts, northeast China"], "weko_shared_id": -1}