2024-03-28T15:03:16Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02008863
2023-08-03T05:41:40Z
1642838163960:1642838338003
1642838403551:1642838406414
沖縄本島北部屋我地島沿岸における湧出ガスの起源
The origin of seeping gas from the coastal area of Yagaji Island in Northern Okinawa Island
土岐, 知弘
本田, 龍太郎
高畑, 直人
大嶺, 一希
木下, 正高
山城, 秀之
角皆, 潤
小松, 大祐
佐野, 有司
Toki, Tomohiro
Honda, Ryutaro
Oomine Kazuki
Tsunogai, Urumu
Komatsu, Daisuke D
Sano, Yuji
Takahata, Naoto
Kinoshita, Masataka
Yamashiro, Hidetuki
Seeping gas
Yagaji Island
Methane
Origin
Carbon isotope
Hydrogen isotope
Helium isotope
Potential source
Chemical and isotopic compositions of seeping gas from the coastal area of Yagaji Island were measured. The gases composed mainly of methane. The δ13C and δD of methane suggest that the origin of the methane is thermal decomposition of organic matter. The δ13C of methane and CH4/(C2H6+C3H8) ratio in the gases suggest long distance migration from the sources. The 3He/4He ratios in the Yagaji gases suggest thermal decomposition of organic matter occurs in deeply-buried sediments. The Yagaji gases would be generated from marine organic matter in the Motobu group around 4 km below the ground.
論文
http://purl.org/coar/resource_type/c_6501
The Geochemical Society of Japan
日本地球化学会
2012-12
VoR
http://hdl.handle.net/20.500.12000/37846
2188-5923
地球化学
4
46
274
257
eng
https://doi.org/10.14934/chikyukagaku.46.257
https://doi.org/10.14934/chikyukagaku.46.257
open access