溶存メタンを指標に用いた富山湾海底湧出地下水の地球化学的研究

亀山 宗彦; KAMEYAMA Sohiko; 角皆 潤; TSUNOGAI Urumu; 蒲生 俊敬; GAMO Toshitaka; 張 勁; ZHANG Jing; 鈴木 麻衣; SUZUKI Mai; 小山 裕樹; KOYAMA Yuki

タイトル	ja 溶存メタンを指標に用いた富山湾海底湧出地下水の地球化学的研究 en Geochemical studies on submarine groundwater discharges in Toyama Bay using methane as a tracer
作成者	ja 亀山, 宗彦 en KAMEYAMA, Sohiko NRID 1000070510543 ja 角皆, 潤 en TSUNOGAI, Urumu NRID 1000050313367 ja 蒲生, 俊敬 en GAMO, Toshitaka NRID 1000070143550 ja 張, 勁 en ZHANG, Jing NRID 1000020301822 ja 鈴木, 麻衣 en SUZUKI, Mai ja 小山, 裕樹 en KOYAMA, Yuki
アクセス権	open access
主題	Other en methane Other en carbon isotope Other en submarine groundwater discharge Other en Toyama Bay NDC 450
内容注記	Abstract en We present here a geochemical study on the SGD in the Toyama Bay using CH4 and its carbon isotope ratio as tracers. We found that all SGD fluids and many of land groundwaters contain less methane than natural water in equilibrium with atmospheric CH4. Theδ13C values of CH4 in the SGD fluids range from -50 to -20‰ VPDB, almost comparable or slightly higher than that of atmospheric CH4. The results suggest that most of methane in the SGD fluids had been derived from the atmosphere and a part of the CH4 is oxidized in the course of groundwater flow through the aquifer, with no CH4 production that is usual in highly anoxic groundwater.This is probably due to little organic matter content in the aquifer and/or a short residence time from recharge to discharge on seafloor. The low concentration and high carbon isotopic ratio of CH4 are similar to those in some of the land groundwaters. The SGD fluid in Uozu should be flowing underground along the Katagai River.
出版者	ja 日本地球化学会
日付	Issued2005-08-20
言語	jpn
資源タイプ	journal article
出版タイプ	VoR
資源識別子	HDL http://hdl.handle.net/2115/44893
収録誌情報	PISSN 0386-4073 NCID AN00141280 ja 地球化学 en Chikyukagaku (Geochemistry) 巻39 号3 開始ページ131 終了ページ140
ファイル	fulltext chikyukagakuv39p131.pdf 3.1 MB (application/pdf) Issued2005-08-20
コンテンツ更新日時	2023-07-26