| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
International collaborative research-field investigations were conducted at Lake Baikal, Russia, using research vessels to study subsurface methane hydrate formation at the ancient lacustrine sediment/stratum. Multibeam echosounder surveys and sub-bottom profiler surveys were conducted to prepare high-resolution bathymetric map at the study areas. Sediment core sampling operations were carried out at a mound/mud volcano-like bottom area.
Sub-surface methane hydrates containing not only microbial-methane but also thermogenic-methane were first retrieved off southern coast of the south basin. Hydrogen and oxygen isotopic anomalies observed in the sediment pore waters from the studied area suggests clay mineral dehydration at the depth.
All results obtained during this study suggest potential relationship between multiphase methane hydrate formation and the ancient sediment/stratum under the studied area.
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