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ID 105961
タイトルヨミ
ヨウケツ ギョウカイガン ノ フウカ ニヨル ガンセキ ブッセイ ノ ヘンカ
タイトル別表記
Rock property changes of welded tuff due to weathering
著者
西山, 賢一 徳島大学大学院ソシオ・アーツ・アンド・サイエンス研究部 徳島大学 教育研究者総覧 KAKEN研究者をさがす
長岡, 信治 元長崎大学教育学部
キーワード
Weathering
Welded Tuff
Osuzu Acidic Rocks
Miyazaki Plain
Rock Properties
Colour Measurement
資料タイプ
紀要論文
抄録
Temporal changes in colour and physical properties due to weathering during 240 ka were examined using welded tuff gravel in fluvial terrace deposits with a known emergence time that were distributed in Miyazaki Plain, Japan. The time between the age of each terrace formation (8, 90, 120 and 240 ka) and the present was assumed to be the weathering period.
The results of the measurements are as follows: (1) effective porosity increases as the weathering period increases; (2) the a*, b*-values of colour induces increase as the weathering period increases. These results suggest that (1) the increase in pores in gravel that occurs as the weathering period increases is caused by the dissolution of biotite; (2) iron concentration and the formation of goethite occur in older gravels. Dissolution of biotite and increasing pore volume play major roles in the weathering of welded tuff.
掲載誌名
徳島大学総合科学部自然科学研究 = Natural Science Research, The University of Tokushima
ISSN
09146385
cat書誌ID
AN10065859
27
4
開始ページ
59
終了ページ
70
並び順
59
発行日
2013-10
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