Himalayan uplift impacts on methane flares

• Project/Area Number: 15F15029
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 外国
• Research Field: Geology
• Research Institution: The University of Tokyo
• Principal Investigator: 川幡 穂高 東京大学, 大気海洋研究所, 教授 (20356851)
• Co-Investigator(Kenkyū-buntansha): HOSSAIN H.M.Zakir 東京大学, 大気海洋研究所, 外国人特別研究員
• Project Period (FY): 2015-10-09 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,300,000 (Direct Cost: ¥2,300,000); Fiscal Year 2017: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2016: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2015: ¥300,000 (Direct Cost: ¥300,000)
• Keywords: organic carbon / organic matter / total nitrogen / shrubs / woody plants / herbaceous plants / バングラデシュ / ヒマラヤ / 風化 / 河川 / 堆積物 / 土壌 / 有機物 / 無機分析 / 有機分析

Outline of Annual Research Achievements

Sediments from the Bay of Bengal were measured for elemental, n-alkanes, and stable carbon (δ13C) and nitrogen (δ15Ntot) isotopic compositions to examine the gas hydrate reservoir systems in the oceanic region. The TOC, C/N ratio and isotopic compositions of the studied sediments suggest a mixture of marine and terrestrial derived organic matter. The negative δ13C values also indicate gas hydrate deposits of microbial methane dominant. Sediment accumulation rate and TOC are likely controlled by high crustal materials input in response to uplift of the Himalaya.

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Geochemical characteristics of modern river sediments in Myanmar and Thailand: Implications for provenance and weathering (2017)
  • Author(s): Hossain H.M. Zakir、Kawahata Hodaka、Roser Barry P.、Sampei Yoshikazu、Manaka Takuya、Otani Souya
  • Journal Title: Chemie der Erde - Geochemistry Volume: 77 Issue: 3 Pages: 443-458
  • DOI: 10.1016/j.chemer.2017.07.005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Downstream and seasonal changes of lithium isotope ratios in the Ganges-Brahmaputra river system (2017)
  • Author(s): Manaka Takuya、Araoka Daisuke、Yoshimura Toshihiro、Hossain H. M. Zakir、Nishio Yoshiro、Suzuki Atsushi、Kawahata Hodaka
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 18 Issue: 8 Pages: 3003-3015
  • DOI: 10.1002/2016gc006738
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spatial and seasonal variation in surface water pCO2 in the Ganges, Brahmaputra, and Meghna Rivers on the Indian subcontinent (2015)
  • Author(s): Manaka, T., Ushie, H., Araoka, D., Inamura, A., Suzuki, A., Hossain, H. M. Zakir. and Kawahata, H.
  • Journal Title: Aquatic Geochemistry Volume: 21 Issue: 5 Pages: 437-458
  • DOI: 10.1007/s10498-015-9262-2
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Geochemical implications of provenance and chemical weathering in the major river sediments of Myanmar and Thailand (2017)
  • Author(s): Hossain H. M.、川幡 穂高、Roser Barry、三瓶 良和、眞中 卓也、大谷 壮矢
  • Organizer: 日本地球惑星科学連合大会
  • Int'l Joint Research
• [Presentation] Geochemical characteristics of organic matter in the Andaman Sea sediments: Implications for source, paleovegetation and paleoclimate changes (2016)
  • Author(s): Zakir Hossain and Hodaka Kawahata
  • Organizer: American Geophysical Union
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2016-12-12
  • Int'l Joint Research