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ID 117527
タイトル別表記
Slaking characteristics of pyrite-bearing mudstone based on mineral compositions
著者
佐藤, 威臣 国土防災技術
竹熊, 隆宏 国土防災技術
長谷川, 修一 香川大学
キーワード
slaking
mudstone
mineral compositions
clay minerals
weathering
pyrite
Fujikawa formation
資料タイプ
紀要論文
抄録
The X-ray diffraction analysis (XRD) and wet-dry slaking test were examined to clarify mudstone weathering and slaking characteristics using drilling cores of the Lower Cretaceous Fujikawa Formation distributed in the Katsuura-gawa area, Tokushima, Japan. The drilling cores of the Fijikawa Mudstone were subdivided into three weathering grades as in the Fresh-zone, Slightly- and Strongly-weathered zones by naked-eye observations. The peaks of quartz, feldspar, calcite, illite and chlorite were detected by XRD analysis of the mudstone. The amount of calcite decreased in relation with the progressing of weathering grade, whereas the amounts of other minerals are constant during the weathering. Pyrite micrograins were extracted by the chemichal-etching process of mudstones. * The laboratory experiments and field observations revealed that the wet-dry slaking occurs in the Fujikawa Mudstone without swelling-clay minerals such as smectite. These characteristics of slaking originate from the changes of rock texture and physical properties of the mudstone with the oxidation of pyrite micrograins and dissolution of calcite under the oxidizing condition.
掲載誌名
自然科学研究
ISSN
09146385
cat書誌ID
AN10065859
出版者
徳島大学総合科学部
20
開始ページ
43
終了ページ
54
並び順
43
発行日
2006-12-22
EDB ID
フルテキストファイル
言語
jpn
著者版フラグ
出版社版
部局
理工学系