Tetra- and pentacyclic alkanes in the Cretaceous/Tertiary boundary sediments at Kawaruppu, Hokkaido, Japan
スポンサーリンク
概要
- 論文の詳細を見る
Twenty two steranes and 17 triterpanes were detected in the Cretaceous-Tertiary (K/T) boundary sediments at Kawaruppu, Hokkaido, Japan. These steranes and triterpanes were detected at a concentration level of 0.001-0.1nmol g^<-1>. Their concentrations were smaller within the K/T boundary claystone than in the sediments above and below the claystone, which are likely related to the large biomass extinction event at the end of the Cretaceous. The concentrations of 5α-cholestane and the relative ones of 17α,21β-hopane in the sediments above the boundary claystone were about a half of those in the sediments below the claystone, whereas those of 5α-ergostane, 5α-stigmastane, and oleanane in the sediments above were less than a half abundance level of those in the sediments below the claystone. Diastereomer ratios of steranes and triterpanes were nearly constant over the sediments. No tricyclic alkanes were detected in the sediments.
- 日本有機地球化学会の論文
- 2002-06-30
著者
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Mita Hajime
Department of Chemistry, University of Tsukuba
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Mita H
Department Of Chemistry University Of Tsukuba
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Shimoyama Akira
Department of Chemistry, University of Tsukuba
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Mita Hajime
Department Of Chemistry University Of Tsukuba
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Yabuta Hikaru
Coordination Center for Research and Education, The Graduate University for Advanced Studies, Shonan
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Shimoyama Akira
Kochi Gakuen College
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Yabuta H
Coordination Center For Research And Education The Graduate University For Advanced Studies Shonan V
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Shimoyama Akira
Institute Of Chemistry The University Of Tsukuba
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Yabuta Hikaru
Coordination Center For Research And Education The Graduate University For Advanced Studies Shonan V
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