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  1. 原著論文

Iodine dating of pore waters associated with gas hydrates in the Nankai Area, Japan.

https://repo.qst.go.jp/records/43134
https://repo.qst.go.jp/records/43134
203c19af-431e-4d69-88a2-c4cac0eda1a6
Item type 学術雑誌論文 / Journal Article(1)
公開日 2003-08-20
タイトル
タイトル Iodine dating of pore waters associated with gas hydrates in the Nankai Area, Japan.
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Fehn, Udo

× Fehn, Udo

WEKO 429160

Fehn, Udo

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Snyder, G.

× Snyder, G.

WEKO 429161

Snyder, G.

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Matsumoto, Ryou

× Matsumoto, Ryou

WEKO 429162

Matsumoto, Ryou

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Muramatsu, Yasuyuki

× Muramatsu, Yasuyuki

WEKO 429163

Muramatsu, Yasuyuki

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Tomaru, Hitoshi

× Tomaru, Hitoshi

WEKO 429164

Tomaru, Hitoshi

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村松 康行

× 村松 康行

WEKO 429165

en 村松 康行

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抄録
内容記述タイプ Abstract
内容記述 The Nankai Hydrate Field, Japan, is an example of gas hydrate deposits associated with an active subduction zone. In order to determine the origin of gas hydrates in this area, 129I/I ratios together with halogen concentrations were measured in a set of pore water samples collected from two bore holes in the Nankai Hydrate Field, Japan. Iodine concentrations are between 100 and 230 E M, i.e. strongly enriched compared to seawater, while Cl concentrations were found to be close to that of seawater. Except for one sample, 129I/I ratios are between 180 and 520x10-15, giving minimum ages between 24 and 48 Ma. Because these ages are considerably older than present host sediments (<2 Ma) and subducting marine sediments (<21 Ma) in this area, iodine (and, by association, methane in the gas hydrates) must have been derived from source formations located in the continental side of the subduction zone. The results do not support derivation of gas hydrates from present host sediments or currently subducting sediments, but could be related to release and long-time recycling of fluids from marine formations of early Tertiary age.
書誌情報 Geology

巻 31, p. 521-524, 発行日 2003
ISSN
収録物識別子タイプ ISSN
収録物識別子 0091-7613
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