Detection of carbon from deep mantle

• Project/Area Number: 26400527
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geochemistry/Cosmochemistry
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: HANYU Takeshi 国立研究開発法人海洋研究開発機構, 地球内部物質循環研究分野, 主任研究員 (50359197)
• Co-Investigator(Kenkyū-buntansha): 小川 奈々子 国立研究開発法人海洋研究開発機構, 生物地球化学研究分野, 主任技術研究員 (80359174)
• Co-Investigator(Renkei-kenkyūsha): OHKOUCHI Naohiko 国立研究開発法人海洋研究開発機構, 生物地球化学研究分野, 分野長 (00281832)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 炭素 / マントル / 物質循環 / 揮発性元素

Outline of Final Research Achievements

Carbon has been exchanged between Earth's surface and mantle, but the mechanism for carbon cycle and the amount of carbon in the mantle are not understood. In order to assess the existence of carbon derived from Earth's surface in the mantle, we studied carbon dioxide in the ocean island basalts that are sourced from the deep mantle. Because carbon dioxide is easily degassed from erupting magmas, we developed the method to measure carbon dioxide in the quenched submarine glasses and melt inclusions in olivine phenocrysts in volcanic rocks. Applying this method for some ocean island basalts, it is inferred that mantle contains some carbon from Earth's surface.

Research Products

• [Journal Article] Key new pieces to the HIMU puzzle from olivines and diamond inclusions (2016)
  • Author(s): Weiss, Y., C. Class, S. L. Goldstein, T. Hanyu
  • Journal Title: Nature Volume: 537 Issue: 7622 Pages: 666-670
  • DOI: 10.1038/nature19113
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Volatiles in olivine-hosted melt inclusions in HIMU basalts from Raivavae, South Pacific (2017)
  • Author(s): T. Hanyu, K. Shimizu, T. Ushikubo, J. Yamamoto, K. Kimoto, Y. Nakamura, J.-I. Kimura, Q. Chang, M. Hamada, M. Ito, H. Iwamori, and T. Ishikawa
  • Organizer: 日本地球惑星科学連合大会２０１７
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2017-05-23
  • Int'l Joint Research
• [Presentation] Geochemical constraints on the age of HIMU mantle reservoirs (2016)
  • Author(s): T. Hanyu
  • Organizer: The 1st Asia-Pacific Workshop on Lithosphere and Mantle Dynamics
  • Place of Presentation: 台北、台湾
  • Year and Date: 2016-09-23
  • Int'l Joint Research / Invited
• [Presentation] Possible carbonated melts from a mantle plume; a study of Raivavae (2016)
  • Author(s): T. Hanyu, H. Kawabata, J.-I. Kimura, T. Miyazaki, R. Senda, Q. Chang, Y. Hirahara, T. Takahashi, B. S. Vaglarov, Y. Tatsumi
  • Organizer: Goldschmidt Conference 2016
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
  • Year and Date: 2016-06-28
  • Int'l Joint Research
• [Presentation] Volatile element compositions of HIMU basalts; a study of Raivavae in the South Pacific (2016)
  • Author(s): T. Hanyu, K. Shimizu, T. Ushikubo, M. Ito, J.-I. Kimura, Q. Chang, M. Hamada, T. Ozawa, H. Iwamori, T. Ishikawa
  • Organizer: 日本地球惑星科学連合大会２０１６
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2016-05-25
  • Int'l Joint Research
• [Presentation] A seamount on top of Ontong Java Plateau was created by remelting of plateau lithosphere by plate flexure (2016)
  • Author(s): T. Hanyu, M. L. G. Tejada, K. Shimizu, O. Ishizuka, J.-I. Kimura, Q. Chang, R. Senda, T. Miyazaki, K. Goto, A. Ishikawa
  • Organizer: 日本地球惑星科学連合大会２０１６
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2016-05-23
  • Int'l Joint Research / Invited
• [Presentation] Volatile element compositions of HIMU basalts; a study of Raivavae in the South Pacific (2015)
  • Author(s): T. Hanyu, K. Shimizu, T. Ushikubo, M. Ito, J.-I. Kimura, Q. Chang, M. Hamada, T. Ozawa, H. Iwamori, T. Ishikawa
  • Organizer: 日本地球惑星科学連合２０１６年大会、JpGU-AGU Joint sesseion
  • Place of Presentation: 幕張メッセ、千葉県千葉市
  • Year and Date: 2015-05-25
  • Int'l Joint Research
• [Remarks] マントル深部由来の玄武岩に炭酸塩の痕跡を発見 ―地球表層とマントルの物質循環モデルに新説－
  • URL: http://www.jamstec.go.jp/j/about/press_release/quest/20160906/