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Kinematic models proposed in the mid-1980s suggest that the differential rotation of the two island arc slivers occurred simultaneously at~15 Ma, over a period of~1-2 Myr, and this view still has a strong influence on geotec tonic studies of Japan. However, recent progress in biostratigraphic and radiometric dating has provided new data indicating that the clockwise rotation of Southwest Japan occurred a few millions of years earlier than was previously suggested. In addition, reinvestigation of middle Miocene (15―14 Ma) igneous rocks that have a northeast-directed remanent magnetization direction suggests that this direction represents a geologically instantaneous paleomagnetic record and should therefore not be used for tectonic analysis. Here we review paleomagnetic and geochronological data for Southwest Japan published during the last quarter century with the aim of revising the timing and amount of clockwise rotation. Results show that clockwise rotation occurred at 18-16 Ma. The maximum amount of rotation relative to the tectonically stable part of the Asian continent is estimated to be 41.7° ±5.4°,based on the assumption that the main part of Southwest Japan rotated as a rigid block. The angular velocity of rotation was about \u003e21°/Myr. These findings are incorporated into a model for the Japan Sea involving two stages of opening as follows: (1) during the earlier stage (Eocene-Oligocene), Southwest Japan was rifted from the eastern margin of the Asian continent with little or no rotation; and (2) during the later stage (Miocene, 18-16 Ma), Southwest Japan migrated to its present position via~40°of clockwise rotation.", "subitem_description_type": "Abstract"}]}, "item_4_link_3": {"attribute_name": "研究者総覧へのリンク", "attribute_value_mlt": [{"subitem_link_text": "星, 博幸", "subitem_link_url": "https://souran.aichi-edu.ac.jp/teachers/3b00c17b43be8186.html"}]}, "item_4_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "日本地質学会"}]}, "item_4_relation_16": {"attribute_name": "関係URI", "attribute_value_mlt": [{"subitem_relation_name": [{"subitem_relation_name_text": "https://doi.org/10.5575/geosoc.2017.0056"}], "subitem_relation_type_id": {"subitem_relation_type_id_text": "https://doi.org/10.5575/geosoc.2017.0056", "subitem_relation_type_select": "DOI"}}]}, "item_4_relation_18": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type": "isIdenticalTo", "subitem_relation_type_id": {"subitem_relation_type_id_text": "info:doi/10.5575/geosoc.2017.0056", "subitem_relation_type_select": "DOI"}}]}, "item_4_rights_12": {"attribute_name": "権利", "attribute_value_mlt": [{"subitem_rights": "著作権は日本地質学会に帰属します。"}]}, "item_4_source_id_11": {"attribute_name": "書誌レコードID", "attribute_value_mlt": [{"subitem_source_identifier": "AN00141768", "subitem_source_identifier_type": "NCID"}]}, "item_4_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0016-7630", "subitem_source_identifier_type": "ISSN"}]}, "item_4_text_10": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"subitem_text_value": "地質学雑誌. 2018, 124(9), p. 675-691."}]}, "item_4_text_26": {"attribute_name": "著者別名", "attribute_value_mlt": [{"subitem_text_value": "ホシ, ヒロユキ"}]}, "item_4_text_4": {"attribute_name": "著者(別言語)", "attribute_value_mlt": [{"subitem_text_value": "Hoshi, Hiroyuki"}]}, "item_4_version_type_14": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_970fb48d4fbd8a85", "subitem_version_type": "VoR"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "星, 博幸"}], "nameIdentifiers": [{"nameIdentifier": "33", "nameIdentifierScheme": "WEKO"}, {"nameIdentifier": "90293737", "nameIdentifierScheme": "e-Rad", "nameIdentifierURI": "https://kaken.nii.ac.jp/ja/search/?qm=90293737"}, {"nameIdentifier": "90293737", "nameIdentifierScheme": "KAKEN - 研究者検索", "nameIdentifierURI": "https://nrid.nii.ac.jp/ja/nrid/1000090293737/"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2019-10-18"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "hoshih009.pdf", "filesize": [{"value": "2.4 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 2400000.0, "url": {"label": "hoshih009.pdf", "url": "https://aue.repo.nii.ac.jp/record/7373/files/hoshih009.pdf"}, "version_id": "c8da756e-2740-4187-aff8-3f38cfca2937"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "Japan Sea opening", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Miocene", "subitem_subject_scheme": "Other"}, {"subitem_subject": "paleomagnetism", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Southwest Japan", "subitem_subject_scheme": "Other"}, {"subitem_subject": "tectoni crotation", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "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": "中新世における西南日本の時計回り回転", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "中新世における西南日本の時計回り回転"}]}, "item_type_id": "4", "owner": "3", "path": ["725"], "permalink_uri": "http://hdl.handle.net/10424/00008494", "pubdate": {"attribute_name": "公開日", "attribute_value": "2019-10-18"}, "publish_date": "2019-10-18", "publish_status": "0", "recid": "7373", "relation": {}, "relation_version_is_last": true, "title": ["中新世における西南日本の時計回り回転"], "weko_shared_id": 3}
中新世における西南日本の時計回り回転
http://hdl.handle.net/10424/00008494
http://hdl.handle.net/10424/00008494c861d962-1343-4d89-8a35-fb92703b9a1e
名前 / ファイル | ライセンス | アクション |
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hoshih009.pdf (2.4 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-10-18 | |||||
タイトル | ||||||
タイトル | 中新世における西南日本の時計回り回転 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Japan Sea opening | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Miocene | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | paleomagnetism | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Southwest Japan | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | tectoni crotation | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
その他のタイトル | ||||||
その他のタイトル | Miocene clockwise rotation of Southwest Japan | |||||
著者 |
星, 博幸
× 星, 博幸 |
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研究者総覧へのリンク | ||||||
星, 博幸 | ||||||
https://souran.aichi-edu.ac.jp/teachers/3b00c17b43be8186.html | ||||||
著者(別言語) | ||||||
著者(別言語) | Hoshi, Hiroyuki | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 西南日本の15Ma高速回転モデルは現在も日本列島の地質学研究に大きな影響を与えている.しかし,微化石層序や放射年代測定の進展,および回転を示すと考えられていた中期中新世残留磁化方位の最近の解釈は,回転年代が従来考えられていたよりも古くなる可能性を示している.今回筆者はこの四半世紀に西南日本から報告された古地磁気と年代のデータをレビューした.重要な結論は,回転が18~16Maの間のある時期に起こったということだ.西南日本が東西縁辺部を除き剛体的に回転したと仮定すると,回転量の上限は41.7±5.4°で,実際にはそれより数度程度小さかったかもしれない.回転の平均角速度は約21°/Myrか,より大きかった可能性がある.日本海拡大初期(始新世~漸新世)に西南日本はほとんど回転を伴わずに大陸から分裂・移動し,約18~16Maに時計回りに40°程度回転しながら現在の位置まで急速に移動したと考えられる. | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | During the Miocene, Southwest and Northeast Japan rotated clockwise and counterclockwise, respectively, associated with opening of the back-arc basins of the Japan Sea. Kinematic models proposed in the mid-1980s suggest that the differential rotation of the two island arc slivers occurred simultaneously at~15 Ma, over a period of~1-2 Myr, and this view still has a strong influence on geotec tonic studies of Japan. However, recent progress in biostratigraphic and radiometric dating has provided new data indicating that the clockwise rotation of Southwest Japan occurred a few millions of years earlier than was previously suggested. In addition, reinvestigation of middle Miocene (15―14 Ma) igneous rocks that have a northeast-directed remanent magnetization direction suggests that this direction represents a geologically instantaneous paleomagnetic record and should therefore not be used for tectonic analysis. Here we review paleomagnetic and geochronological data for Southwest Japan published during the last quarter century with the aim of revising the timing and amount of clockwise rotation. Results show that clockwise rotation occurred at 18-16 Ma. The maximum amount of rotation relative to the tectonically stable part of the Asian continent is estimated to be 41.7° ±5.4°,based on the assumption that the main part of Southwest Japan rotated as a rigid block. The angular velocity of rotation was about >21°/Myr. These findings are incorporated into a model for the Japan Sea involving two stages of opening as follows: (1) during the earlier stage (Eocene-Oligocene), Southwest Japan was rifted from the eastern margin of the Asian continent with little or no rotation; and (2) during the later stage (Miocene, 18-16 Ma), Southwest Japan migrated to its present position via~40°of clockwise rotation. | |||||
書誌事項 |
地質学雑誌 巻 124, 号 9, p. 675-691, 発行日 2018 |
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出版者 | ||||||
出版者 | 日本地質学会 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0016-7630 | |||||
書誌情報 | ||||||
地質学雑誌. 2018, 124(9), p. 675-691. | ||||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00141768 | |||||
権利 | ||||||
権利情報 | 著作権は日本地質学会に帰属します。 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
関係URI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.5575/geosoc.2017.0056 | |||||
関連名称 | https://doi.org/10.5575/geosoc.2017.0056 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.5575/geosoc.2017.0056 | |||||
著者別名 | ||||||
著者別名 | ホシ, ヒロユキ | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | text |