書誌事項
- タイトル別名
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- Evaluation of the effect of turbidity currents in the formation of hemipelagic siltstones: An example from the lower Pleistocene Kazusa Group on the Boso Peninsula, Japan
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説明
This study investigated downslope variations in sedimentation rate, grain size, magnetic susceptibility, and clay mineral composition of hemiplelagic siltstones in the Kd8 (ca. 1.2 Ma) and O7 (ca. 0.9 Ma) volcanic ash key bed horizons in the Pleistocene Kazusa Group on the Boso Peninsula, Japan. In general, sedimentation rates decrease in the downslope directions in association with the decrease in grain size, except for local increases in sedimentation rates and grain size as a response to additional supply of fine-grained sediment particles from turbidity currents. In contrast, although the magnetic susceptibility shows a downslope variation in harmony with that in grain size in the O7 volcanic ash key bed horizon, it is also influenced by local development of authigeneic magnetic minerals in the Kd8 volcanic key ash bed horizon. Regardless of the spatial variations in sedimentation rates, grain size, and magnetic susceptibility, clay mineral composition does not show any distinct spatial variation and can be used as a proxy of temporal variation in hinterland geology and paleoclimates in a one-dimensional stratigraphic record.
収録刊行物
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- 堆積学研究
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堆積学研究 72 (2), 153-157, 2008
日本堆積学会
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詳細情報 詳細情報について
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- CRID
- 1390001205218916736
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- NII論文ID
- 130004543469
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- ISSN
- 18829457
- 1342310X
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
