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  1. 学術雑誌論文
  2. その他
  1. 部局別インデックス
  2. 理学部

In situ thermal excursions detected in the Nankai Trough forearc slope sediment at IODP NanTroSEIZE Site C0008

http://hdl.handle.net/20.500.12000/37646
http://hdl.handle.net/20.500.12000/37646
3863a738-3fba-45fb-8dc5-76d86ec36a40
名前 / ファイル ライセンス アクション
vol67no16.pdf vol67no16.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2018-02-05
タイトル
タイトル In situ thermal excursions detected in the Nankai Trough forearc slope sediment at IODP NanTroSEIZE Site C0008
言語 en
作成者 Kinoshita, Masataka

× Kinoshita, Masataka

en Kinoshita, Masataka

Fukase, Hiroaki

× Fukase, Hiroaki

en Fukase, Hiroaki

Goto, Shusaku

× Goto, Shusaku

en Goto, Shusaku

Toki, Tomohiro

× Toki, Tomohiro

en Toki, Tomohiro

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
主題
言語 en
主題Scheme Other
主題 NanTroSEIZE
言語 en
主題Scheme Other
主題 Methane hydrate
言語 en
主題Scheme Other
主題 Endothermic
言語 en
主題Scheme Other
主題 Friction
内容記述
内容記述タイプ Other
内容記述 At Integrated Ocean Drilling Program (IODP) Site C0008 in the Nankai Trough slope sediment, we discovered in situ temperature anomalies at 80 to 160 m below the seafloor, where pore fluid Cl and δ 18O excursions were identified and interpreted as pore fluid refreshing due to hydrate dissociation. The volume fraction of hydrates is estimated to be approximately 3% and approximately 40% maximum at Holes C0008A and C0008C, respectively. In the vicinity of these anomalies, we discovered negative and positive temperature excursions of up to 1 K measured in situ using the Advanced Piston Corer Temperature (APC-T) tool attached to the shoe of a hydraulic piston corer. They are significantly larger than the uncertainties caused during data acquisition and processing. Frictional heat due to penetration increased the temperature by >10 K, exceeding the gas/hydrate stability temperature at that depth. This heat is partly consumed by hydrate dissociation, which disturbs the thermal decay curve after penetration, but 2D numerical modeling revealed that hydrate dissociation does not significantly change the extrapolated equilibrium temperature. So far, we cannot suggest any acceptable explanation for the observed thermal anomalies, although we strongly suspect that it is related to hydrate dissociation.
内容記述タイプ Other
内容記述 論文
出版者
言語 en
出版者 Springer
言語
言語 eng
資源タイプ
資源タイプ journal article
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/37646
識別子タイプ HDL
関連情報
関連識別子
識別子タイプ DOI
関連識別子 https://doi.org/10.1186/s40623-014-0171-1
関連識別子
識別子タイプ DOI
関連識別子 info:doi/10.1186/s40623-014-0171-1
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1880-5981
収録物名
言語 en
収録物名 Earth, Planets and Space
書誌情報
巻 67, 号 16, p. 1-9
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