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https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00007573
2023-04-20T00:44:25Z
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オホーツク海天然ガスハイドレートの同位体組成とその結晶特性
Isotopic Composition and Crystallographic Properties of Gas Hydrate in the Sea of Okhotsk
Isotopic Composition and Crystallographic Properties of Gas Hydrate in the Sea of Okhotsk
八久保, 晶弘
八久保, 晶弘
八久保
八久保
晶弘
晶弘
坂上, 寛敏
南, 尚嗣
布, 川 裕
庄, 子 仁
open access
ガスハイドレート
安定同位体
解離熱
ラマン分光法
水和数
gas hydrate
stable isotope
dissociation heat
Raman spectroscopy
hydration number
New hydrate-bearing seepage structures off Sakhalin in the Sea of Okhotsk were investigated
from 2003 to 2006 within the framework of the CHAOS project. We obtained samples of natural
gas hydrate and measured the molecular and isotopic compositions of hydrate-bound gas.
Methane δ13C and δD were in the range of -67 to -63‰ and -207 to -193‰, respectively.
These results indicate a microbial origin produced by CO2 reduction according to Whiticar's diagram.
Because ethane δ13C showed a thermogenic origin, hydrate-bound gas contains a small
amount of thermogenic gas. The hydration numbers of the samples were estimated as 6.19 ±
0.02 using the Raman spectra of the C?H stretching mode and a thermodynamic calculation.
Heat flow calorimetry revealed that the values for dissociation heat of the samples were 18.1 ±
0.3 kJ mol-1( from hydrate phase to gas and ice phases) and 55.4±0.4 kJ mol-1( from hydrate
phase to gas and water phases), which agree well with the values in of literature.
東京地学協会
2009-03
jpn
journal article
VoR
https://kitami-it.repo.nii.ac.jp/records/7573
http://doi.org/10.5026/jgeography.118.207
地學雜誌
118
1
207
221
https://kitami-it.repo.nii.ac.jp/record/7573/files/(2009)JGeog_1.pdf
application/pdf
1.4 MB
2016-11-22