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Title :沖縄本島北部屋我地島沿岸における湧出ガスの起源
Authors :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
Authors alternative :Toki, Tomohiro
Honda, Ryutaro
Oomine Kazuki
Tsunogai, Urumu
Komatsu, Daisuke D
Sano, Yuji
Takahata, Naoto
Kinoshita, Masataka
Yamashiro, Hidetuki
Issue Date :Dec-2012
Abstract :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.
URL :https://doi.org/10.14934/chikyukagaku.46.257
Type Local :雑誌掲載論文
ISSN :2188-5923
Publisher :The Geochemical Society of Japan
URI :http://hdl.handle.net/20.500.12000/37846
Citation :地球化学 Vol.46 no.4 p.257 -274
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Science)

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