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タイトルヨミ
チュウ シンセイ オナガワ ケイシツ タイセキブツ チュウ ノ イソプレノイド チオフェン
日本語以外のタイトル
Isoprenoid Thiophenes in Miocene Onnagawa Siliceous Sediments, Japan
ファイル
言語
英語
著者
鈴木 徳行
内容記述(抄録等)
The isoprenoid thiophenes with 20 carbons (3-methyl-2-(3.7,1 l-trimethyldodecyl)-thio-phene and 3-(4,8,12-trimethyltridecyl)-thiophene) are significantly detected in Miocene Onnagawa siliceous sediments (sample 82408) from Oomagari, Akita Prefecture, Japan. Associated kerogen is also rich in organosulphur (S 7.7% and atomic S/C 0.063) and can be classified as Type II-S kerogen. The isoprenoid thiophenes are possibly formed abiogenically by reactions of H2S with several phytadiene isomers derived from dehydration and reduction of phytol in the very early stage of diagenesis. The isoprenoid thiophenes are not always detected in contemporaneous siliceous and non-siliceous sediments. The unique presence of isoprenoid thiophenes in Onnagawa siliceous sediments from Oomagari is due to the followings: (1) the sample is anomalously poor in clay minerals having active iron which removes HIS. (2) the marked contribution of diatom-derived organic matter rich in chlorophyll-derived phytol as a precursory compound of isoprenoid thiohenes, and (3) the anoxic condition favorable for the formation of abundant H2S as source of organosulphur.
掲載誌名
島根大学理学部紀要
26
開始ページ
107
終了ページ
115
ISSN
03879925
発行日
1992-12-25
NCID
AN00108106
出版者
島根大学理学部
出版者別表記
The Faculty of Science, Shimane University
資料タイプ
紀要論文
部局
総合理工学部
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