Thermal and material recycling process in the upper mantle beneath off-arc region

• Project/Area Number: 23740398
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Osaka City University (2014-2015); Japan Agency for Marine-Earth Science and Technology (2011-2013)
• Principal Investigator: Sakuyama Tetsuya 大阪市立大学, 大学院理学研究科, 准教授 (80553081)
• Project Period (FY): 2011-04-28 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: アルカリ玄武岩 / プレート内火山 / スタグナントスラブ / ユーラシア大陸東縁部 / 海洋地殻 / 堆積物 / マントル遷移層 / 超背弧域 / 脱水した海洋地殻 / 流体 / 沈み込んだ堆積物 / 国際情報交換 / 北京大学 / 中国東北部地域 / アルカリ玄武岩火山 / 停滞スラブ / 上部マントル / 背弧火成活動 / 沈み込み堆積物 / 国際情報交流 / 中国東部地域 / HIMU玄武岩

Outline of Final Research Achievements

Stagnation of the subducted Pacific slab in the mantle transition zone beneath eastern China has been imaged by seismic tomography. Late Cenozoic basaltic volcanoes lying above the stagnant slab, are distributed throughout eastern China. These basalts are rich in alkaline and incompatible trace elements that are typically associated with oceanic island basalts (OIBs). Such geochemical similarities between the basalts in eastern Asia and typical OIBs have led some researchers to conclude that the Chinese basalts originated from the upwelling of mantle, independent of a stagnant slab. According to the results of high-pressure experiments, melting of the stagnant slab could occur if the slab contains adequate amounts of H2O or CO2. In this study, we presented geochemical and petrological evidence that melts from the igneous layers in the stagnant Pacific plate slab have contributed to the source composition of basalts erupted in eastern China.

Research Products

• [Journal Article] Progressive interaction between dry and wet mantle during high-temperature diapiric upwelling: constraints from Cenozoic Kita-Matsuura intraplate basalt province, northwestern Kyushu, Japan (2014)
  • Author(s): Tetsuya Sakuyama, Shun'Ichi Nakai, Masako Yoshikawa, Tomoyuki Shibata, Kazuhito Ozawa
  • Journal Title: Journal of Petrology Volume: 印刷中 Issue: 6 Pages: 1083-1128
  • DOI: 10.1093/petrology/egu020
  • Peer Reviewed / Open Access
• [Journal Article] Melting of the Uppermost Metasomatized AsthenosphereTriggered by Fluid Fluxing from Ancient Subducted Sediment: Constraints from the Quaternary Basalt Lavas at Chugaryeong Volcano, Korea (2014)
  • Author(s): Tetsuya Sakuyama, Shinji Nagaoka, Takashi Miyazaki, Qing Chang, Toshiro Takahashi, Yuka Hirahara, Ryoko Senda, Tetsumaru Itaya, Jun-Ichi Kimura, Kazuhito Ozawa
  • Journal Title: Journal of Petrology Volume: 55 Issue: 3 Pages: 499-528
  • DOI: 10.1093/petrology/egt074
  • Peer Reviewed
• [Journal Article] Melting of dehydrated oceanic crust from the stagnant slab and (2013)
  • Author(s): Tetsuya Sakuyama, Wei Tian, Jun-Ichi Kimura, Yoshio Fukao, Yuka Hirahara, Toshiro Takahashi, Ryoko Senda, Qing Chang, Takashi Miyazaki, Masayuki Obayashi, Hiroshi Kawabata, Yoshiyuki Tatsumi
  • Journal Title: Chemical Geology Volume: 359 Pages: 32-48
  • DOI: 10.1016/j.chemgeo.2013.09.012
  • Peer Reviewed
• [Journal Article] ユーラシア大陸東縁部の新生代背弧域火山活動 (2013)
  • Author(s): 柵山徹也
  • Journal Title: 岩石鉱物科学 Volume: ―
  • NAID: 10031158583
  • Peer Reviewed
• [Presentation] Volcanism Above a Stagnant Slab: Constraints from Cenozoic Alkaline Basalts in Eastern China and Korea (2016)
  • Author(s): Tetsuya Sakuyama, Jun-Ichi Kimura
  • Organizer: Goldschmidt 2016
  • Place of Presentation: パシフィコ横浜，神奈川県
  • Year and Date: 2016-06-28
  • Int'l Joint Research
• [Presentation] 神鍋単成火山群におけるアルカリ玄武岩のマグマプロセス (2016)
  • Author(s): 高橋崚，柵山徹也
  • Organizer: 日本地球惑星科学連合 連合大会 2016年大会
  • Place of Presentation: 幕張メッセ，千葉県
  • Year and Date: 2016-05-22
• [Presentation] 新生代東北アジア背弧域火山岩からみる上部マントル (2011)
  • Author(s): 柵山徹也、宮崎隆 、常青 、高橋俊郎 、 平原由香 、仙田量子、Wei Tian、木村純一
  • Organizer: 日本地球惑星科学連合 2011年度連合大会
  • Place of Presentation: 千葉幕張メッセ
• [Presentation] 停滞スラブのマントル遷移層における融解：中国東部、山東半島玄武岩からの制約 (2011)
  • Author(s): 柵山徹也、Wei Tian、木村純一、深尾良夫、平原由香、 高橋俊郎、仙田量子、常青、宮崎隆、大林政行、巽好幸
  • Organizer: 日本火山学会2011年度秋季大会
  • Place of Presentation: 旭川市大雪クリスタルホール
• [Presentation] Melting of the oceanic crust in the stagnant slab at the mantle transition zone: Constraints from alkaline basalts in eastern China (2011)
  • Author(s): Tetsuya Sakuyama, Wei Tian, Jun-Ichi Kimura, Yoshio Fukao, Yuka Hirahara, Toshiro Takahashi, Ryoko Senda, Qing Chang, Takashi Miyazaki, Masayuki Obayashi, and Yoshiyuki Tatsumi
  • Organizer: AGU fall meeting 2011
  • Place of Presentation: Moscone Center, San Francisco
• [Presentation] Cenozoic off-arc volcanisms and mantle dynamics in eastern margin of Eurasian continent
  • Author(s): Tetsuya Sakuyama, Jun-Ichi Kimura
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ（千葉県）
  • Invited
• [Presentation] Melting of a stagnant slab in the mantle transition zone: Constraints from Cenozoic alkaline basalts in eastern China
  • Author(s): Tetsuya Sakuyama, Wei Tian, Jun-Ichi Kimura, Yoshio Fukao, Yuka Hirahara, Toshiro Takahashi, Ryoko Senda, Qing Chang, Takashi Miyazaki, Masayuki Obayashi, Hiroshi Kawabata, Yoshiyuki Tatsumi
  • Organizer: IAVCEI2013 Scientific Assembly
  • Place of Presentation: かごしま県民交流センター（鹿児島県）
• [Presentation] Melting of the oceanic crust in the stagnant slab at the mantle transition zone: Constraints from alkaline basalts in eastern China
  • Author(s): 柵山徹也、Wei Tian、木村純一、深尾良夫、平原由香、高橋俊郎、仙田量子、常青、宮崎隆、大林政行、巽好幸
  • Organizer: 地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ
• [Presentation] スラブからの流体と背弧域におけるマントル融解：韓国第四紀Chugaryeong火山からの地球化学的制約
  • Author(s): 柵山徹也、長岡信治、木村純一、平原由香、高橋俊郎、仙田量子、常青、宮崎隆、板谷徹丸、小澤一仁
  • Organizer: 日本火山学会2012年秋季大会
  • Place of Presentation: エコールみよた
• [Presentation] Cenozoic alkaline off-arc volcanisms and mantle dynamics in the eastern margin of the Eurasian continent
  • Author(s): 柵山徹也
  • Organizer: 地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ
  • Invited
• [Remarks] Melting of the oceanic crust in stagnant slab
  • URL: http://www.mantleplumes.org/StagnantSlabs.html
• [Remarks] Melting of the oceanic crust in stagnant slabs
  • URL: http://www.mantleplumes.org/StagnantSlabs.html