{"_buckets": {"deposit": "1db5efc4-2b8f-457e-a2ee-eafbd3911a56"}, "_deposit": {"id": "4294", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "4294"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00004294", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2012-02"}, "bibliographicPageEnd": "23", "bibliographicPageStart": "17", "bibliographicVolumeNumber": "45", "bibliographic_titles": [{"bibliographic_title": "Journal of Asian Earth Sciences", "bibliographic_titleLang": "ja"}, {"bibliographic_title": "JOURNAL OF ASIAN EARTH SCIENCES", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "To constrain the thermal and its spatial conditions of pseudotachylyte formation and cooling, we dated zircons from a pseudotachylyte in the Ryoke belt obtained about 100 m north from the Median Tectonic Line in the Taki area, southwest Japan, and its host rock, the Hatai Tonalite, by the (U-Th)/He method. The ages obtained are 60.3 +/- 2.7 and 55.5 +/- 4.5 (1SE) Ma, respectively, which are essentially the same within the error. This is the first (U-Th)/He age directly measured for a pseudotachylyte. The coincidence between these ages indicates that the pseudotachylyte formed at ca. 60 Ma under the ambient temperature of about 180 degrees C, the closure temperature of zircon (U-Th)/He method. The Fish Canyon Tuff zircon, one of the most well-known geological age standards, was also dated to confirm the validity of our analyses, which yielded the weighted mean age of 29.6 +/- 1.5 (1SE) Ma, consistent with other reported ages. The average cooling rates and denudation rates of the host rock were calculated based on these ages, reported zircon fission-track ages (ca. 70 Ma) and apatite fission-track ages (ca. 40 Ma) as about 12 degrees C/Myr and about 0.6 mm/yr from 70 to 60 Ma, and about 4 degrees C/Myr and about 0.2 mm/yr from 60 to 40 Ma, respectively, assuming that the closure temperatures of zircon and apatite FT methods are 300 degrees C and 110 degrees C, respectively, and a geothermal gradient of 20 degrees C/km. One possible reason of this slow down of denudation rates is the decrease of convergent rate and change in the movement direction of the Pacific Plate relative to the Eurasian Plate along the southwest Japan in the Paleogene. (C) 2011 Elsevier Ltd. 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": "PERGAMON-ELSEVIER SCIENCE LTD", "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.jseaes.2011.08.009"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "1878-5786", "subitem_source_identifier_type": "EISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "K. Yamada", "creatorNameLang": "ja"}, {"creatorName": "Kunimi Yamada", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "T. Hanamuro", "creatorNameLang": "ja"}, {"creatorName": "Takahiro Hanamuro", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "T. Tagami", "creatorNameLang": "ja"}, {"creatorName": "Takahiro Tagami", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "K. Shimada", "creatorNameLang": "ja"}, {"creatorName": "Koji Shimada", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "H. Takagi", "creatorNameLang": "ja"}, {"creatorName": "Hideo Takagi", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "R. Yamada", "creatorNameLang": "ja"}, {"creatorName": "Ryuji Yamada", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "K. Umeda", "creatorNameLang": "ja"}, {"creatorName": "Koji Umeda", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_title": "The first (U–Th)/He thermochronology of pseudotachylyte from the Median Tectonic Line, southwest Japan", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "The first (U–Th)/He thermochronology of pseudotachylyte from the Median Tectonic Line, southwest Japan", "subitem_title_language": "ja"}, {"subitem_title": "The first (U-Th)/He thermochronology of pseudotachylyte from the Median Tectonic Line, southwest Japan", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4294", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "4294", "relation": {}, "relation_version_is_last": true, "title": ["The first (U–Th)/He thermochronology of pseudotachylyte from the Median Tectonic Line, southwest Japan"], "weko_shared_id": -1}