Experimental determination of carbon isotope fractionation in theFe-C system under HPHT conditions.

2012 Fiscal Year Final Research Report

• Project/Area Number: 23654186
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Niigata University (2012); Shizuoka University (2011)
• Principal Investigator: エム サティッシュ-クマール 新潟大学, 自然科学系, 教授 (50313929)
• Co-Investigator(Kenkyū-buntansha): YOSHINO Takashi 岡山大学, 地球物質科学研究センター, 准教授 (30423338)
• Project Period (FY): 2011 – 2012
• Keywords: 岩石 / 鉱物 / 鉱床学 / 炭素同位体 / Fe-C系 / 高温高圧実験 / 同位体分別

Research Abstract

Equilibrium carbon isotope fractionation between graphite/diamond and iron carbide melt at 5 and 10 GPa and in the temperature range between 1200 and 2000 oC was determined. The results suggest that iron carbide melt will preferentially accumulate12^C rather than 13^C. We proposed that the temperature-dependent fractionation of carbon isotopes between iron carbide melt and graphite/diamond might have created a “12^C-enriched core” with a significant difference in the distribution of carbon isotopes between the carbon in the metallic core and bulk silicate Earth during the accretion and differentiation of early Earth.

Research Products

• [Journal Article] Carbon isotope fractionation in the Fe-C system at HPHT experiments: Reply to the comment by Reutsky and Borzdov (2013)
  • Author(s): Satish-Kumar, M., So, H., Yoshino, T., Kato, M. and Hiroi, Y.
  • Journal Title: Earth and Planetary Science Letters Volume: 368 Pages: 222-224
  • DOI: DOI:10.1016/j.epsl.2013.03.032
  • Peer Reviewed
• [Journal Article] Experimental determination of carbon isotope fractionation between iron carbide melt and carbon: 12C-enriched carbon in the Earth's core? (2011)
  • Author(s): Satish-Kumar, M., So, H., Yoshino, T., Kato, M., Hiroi Y.
  • Journal Title: Earth and Planetary Science Letters Volume: 310 Pages: 340-348
  • DOI: DOI:10.1016/j.epsl.2011.08.008
  • Peer Reviewed
• [Journal Article] Carbon isotope anatomy of a single graphite crystal in a metapelitic migmatite revealed by high-spatial resolution SIMS analysis. (2011)
  • Author(s): Satish-Kumar, M., Yurimoto, H., Itoh, S., Cesare B.
  • Journal Title: Contributions to Mineralogy and Petrology Volume: 162 Pages: 821-834
  • DOI: DOI:10.1007/s00410-011-0626-3
  • Peer Reviewed
• [Presentation] Experimental determination of carbon isotope fractionation in the deep Earth (2012)
  • Author(s): Satish-Kumar, M., Yoshino, T., Mizutani, S., So, H. and Kato, M.
  • Organizer: 2012年度日本地球化学会第59回年会
  • Place of Presentation: 九州大学
  • Year and Date: 20120911-0913
• [Presentation] Experimental studies on carbon isotope fractionation in the deep Earth (2012)
  • Author(s): Satish-Kumar, M., Yo shino, T., Mizutani, S., So, H. and Kato, M.
  • Organizer: The 22nd V.M. Goldschmidt Conference
  • Place of Presentation: Montreal,Canada
  • Year and Date: 20120624-29
• [Presentation] High-pressure and high-temperature experimental study of carbon isotope fractionation in the Mg-Si-C-O system (2012)
  • Author(s): Mizutani, S., Satish-Kumar, M., Yoshino, T. and Kato, M.
  • Organizer: The 22nd V.M. Goldschmidt Conference
  • Place of Presentation: Montreal,Canada
  • Year and Date: 20120624-29
• [Presentation] Understanding carbon isotopesystematics in the deep Earth (2012)
  • Author(s): Satish-Kumar, M., Yoshino, T., Mizutani, S., So, H., Kato, M.
  • Organizer: Joint Symposium of Misasa-2012 and Geofluid-2: Dynamics and Evolution of the Earth's Interior: special emphasis on the role of fluids
  • Place of Presentation: Institute for Study of the Earth's Interior,Okayama University, Misasa, apan(招待講演)
  • Year and Date: 20120318-21
• [Presentation] Experimental determination of carbon isotope fractionation between iron carbide melt and carbon: 12C-enriched carbon in the Earth's core? (2011)
  • Author(s): Satish-Kumar, M., So, H., Yoshino, T., Kato, M., Hiroi, Y.
  • Organizer: 日本鉱物科学会2011年年会
  • Place of Presentation: 茨城大学(水戸市)
  • Year and Date: 20110909-11
• [Presentation] Carbon isotope fractionation during the formation of the Earth's core (2011)
  • Author(s): Satish-Kumar, M., So, H., Yoshino, T., Kato, M., Hiroi, Y.
  • Organizer: 日本地球惑星科学連合2011 年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉市)
  • Year and Date: 20110522-27
• [Presentation] Hidden light carbon in the Earth's core?: Evidence from high pressure high temperature experiments in the Fe-C system (2011)
  • Author(s): Satish-Kumar, M., So, H., Yoshino, T., Kato, M., Hiroi, Y.
  • Organizer: 第31回極域地学シンポジウム
  • Place of Presentation: 国立極地研究所(立川市)
  • Year and Date: 2011-11-17