Laboratory experiments of hydrothermal reactions in Enceladus : Toward understanding chemistry in the interior ocean

2011 Fiscal Year Final Research Report

• Project/Area Number: 22740352
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Geochemistry/Astrochemistry
• Research Institution: The University of Tokyo
• Principal Investigator: SEKINE Yasuhito 東京大学, 大学院・新領域創成科学研究科, 講師 (60431897)
• Project Period (FY): 2010 – 2011
• Keywords: 惑星科学 / 地球化学 / 惑星探査

Research Abstract

We have investigated chemical reactions between primordial volatiles(such as ammonia and carbon dioxide) and primitive minerals(such as olivine) in Enceladus' interior ocean by conducting laboratory experiments of hydrothermal reactions. By comparing the results with the observations of Enceladus' plume by the Cassini spacecraft, we have discussed the temperature conditions of possible hydrothermal systems and habitability in Enceladus' ocean.

Research Products

• [Journal Article] Giant impacts in the Saturnian system : a possible origin of diversity in the inner mid-sized satellites (2012)
  • Author(s): Sekine, Y., H. Genda
  • Journal Title: Planetary and Space Science Volume: 63-64 Pages: 133-138
  • Peer Reviewed
• [Journal Article] Oxidizing proto-atmosphere on Titan : constraint from N_2 formation by impact shock (2011)
  • Author(s): Ishimaru, R., Y. Sekine, T. Matsui, O. Mousis
  • Journal Title: Astrophysical Journal Letters Volume: 741 : L10 Pages: 1-6
  • DOI: doi:10.1088/2041-8205/1/L10.
  • Peer Reviewed
• [Journal Article] Osmium evidence for synchronicity between a rise in atmospheric oxygen and Palaeoproterozoic deglaciation (2011)
  • Author(s): Sekine, Y., K. Suzuki, R. Senda, K. T. Goto, E. Tajika, R. Tada, K. Goto, S. Yamamoto, N. Ohkouchi, N. O. Ogawa, T. Maruoka
  • Journal Title: Nature Communications Volume: 2 : 502 Pages: 1-6
  • DOI: doi:10.1038/ncomms1507.
  • Peer Reviewed
• [Journal Article] Manganese enrichment in the Gowganda Formation of the Huronian Supergroup : a highly oxidizing shallow-marine environment after the last Huronian glaciation (2011)
  • Author(s): Sekine, Y., E. Tajika, R. Tada, T. Hirai, K. T. Goto, T. Kuwatani, K. Goto, S. Yamamoto, S. Tachibana, Y. Isozaki, J. L. Kirschv ink
  • Journal Title: Earth and Planetary Science Letters Volume: 307 Pages: 201-210
  • Peer Reviewed
• [Journal Article] Replacement and late formationof atmospheric N2 on undifferentiated Titan by impacts (2011)
  • Author(s): Sekine, Y., H. Genda, S. Sugita, T. Kadono, T. Matsui
  • Journal Title: Nature Geoscience Volume: 4 Pages: 359-362
• [Journal Article] 化学実験から惑星の起源・多様性の理解を目指して (2010)
  • Author(s): 関根康人
  • Journal Title: 日本惑星科学会誌,遊星人 Volume: 19, 4 Pages: 303-313
• [Journal Article] Impact-induced N2 production from ammonium sulfate : Implications for the origin and evolution of N2 in Titan's atmosphere (2010)
  • Author(s): Fukuzaki, S. Y. Sekine, H. Genda, S. Sugita, T. Kadono, T. Matsui
  • Journal Title: Icarus Volume: 209, 2 Pages: 715-722
• [Journal Article] Anomalous negative excursion of carbon isotope in organic carbon after the last Paleoproterozoic glaciation in North America (2010)
  • Author(s): Sekine, Y., E. Tajika, N. Ohkouchi, N. O. Ogawa, K. Goto, R. Tada, S. Yamamoto, J. L. Kirschvink
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 11 Pages: Q08019
  • DOI: doi:10.1029/2010GC003210.
• [Presentation] Hydrothermal systems in Enceladus : Constraints from experiments and observations (2011)
  • Author(s): Sekine, Y., T. Shibuya, T. Kuwatani, K. Suzuki
  • Organizer: Planetary Geology Field Symposium
  • Place of Presentation: Kitakyusyu, Japan
  • Year and Date: 2011-11-06
• [Presentation] Experimental constraints on exogenic and endogenic N2 formation on Titan, Triton, and Enceladus (2011)
  • Author(s): Sekine, Y.(invited)
  • Organizer: Nitrogen in planetary systems : the early evolution of the atmospheres of terreestrial planets
  • Place of Presentation: Barcelona, Spain
  • Year and Date: 2011-09-23
• [Presentation] Experimental constraints on hydrothermal systems on Enceladus (2011)
  • Author(s): Sekine, Y., T. Shibuya, K. Suzuki(invited)
  • Organizer: Asia Oceania Geosciences Society 2011
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2011-08-11
• [Presentation] Atmospheric replacement and late formation of N2 on undifferentiated Titan during the Late Heacy Bombardment (2010)
  • Author(s): Sekine, Y., H. Genda, S. Sugita, T. Kadono, T. Matsui
  • Organizer: American Geophysical Union fall meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2010-12-14
• [Presentation] Laboratory experiments on hypervelocity impacts on planetary ices (2010)
  • Author(s): Sekine, Y.(invited)
  • Organizer: International Workshop on Advances in Planetary Atmospheres and Exploration
  • Place of Presentation: Ahmedabad, India, July 2010
  • Year and Date: 2010-07-11