CLAY MINERALOGICAL DIFFERENCE BETWEEN BEDROCK AND COLLUVIAL-SOIL SLIDES IN THE NORTHERN PART OF NAGASAKI
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- EGASHIRA K.
- Faculty of Agriculture, Kyushu University
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説明
Two types of landslide, namely bedrock and colluvial-soil slides, are found in the northern part (Kitamatsuura-gun) of Nagasaki Prefecture. The bedrock slide has a slip surface in the tuffaceous coal seams intercalated in the Miocene sediments composed of sandstone and mudstone. The colluvial-soil slide occurred in colluvial materials overlying bedrock and movement was for a relatively short distance. The samples were collected from sites undergoing bedrock or colluvial-soil slide and analyzed for physical, chemical and mineralogical properties. A large clay mineralogical difference was found between the samples of bedrock and colluvial-soil slides, while such properties as particle-size distribution and proportions of exchangeable cations were not substantially different. The sample from the site undergoing a bedrock slide was characterized by a high amount of smectite, and the samples from colluvial-soil slides contained mica, kaolinite, and less smectite. Such clay mineralogical difference may partly be related to the small scale of colluvial-soil slides compared to bedrock slides.
収録刊行物
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- Clay Sci.
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Clay Sci. 6 217-223, 1986
日本粘土学会
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詳細情報 詳細情報について
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- CRID
- 1572261552239350400
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- NII論文ID
- 110003709487
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- NII書誌ID
- AA00607148
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- ISSN
- 00098574
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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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- CiNii Articles
