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タイトルヨミ
Zn-Fe2_O_3 ハンべツズ カラ タイセキ カンキョウ オ ヒョウカ スル
タイトル別表記
Evaluation of sedimentary environment using a Zn-Fe_2O_3 diagram
ファイル
言語
日本語
著者
道前 香緒里
アーメッドファルキ
Mst. Hawa Bibi
海田 学
内容記述(抄録等)
A Zn-Fe_2O_3 discrimination diagram is proposed to evaluate sedimentary environments using geochemical data from coastal lagoon,tidal flat,lake and fluvial sediments.The concentration of zinc is sensitive to change in redox conditions.Zinc tends to be soluble in a reducing condition with divalent iron,and may accumulate as a sulfide mineral or be adsorbed to organic matter.Bulk geochemical composition,however,is also related to source material,and varies with grain size.Zinc behaves similarly to iron in igneous process and may form compositional trends on Zn-Fe_2O_3 cross plots.Concentrations of Zn and Fe_2O_3 of normal sediments plot above the igneous compositional trend,and have steep inclination,suggesting enrichment ofZn over iron in finer grained sediments.Zn-Fe_2O_3 data from coastal lagoon in cities such as Hiroshima and Fukuoka show further enrichment of Zn over that of normal sediments.Data from larger cities such as Osaka city plot significantly above the Hiroshima trend,which identifying pollution from artificial activity,such as vehicle emission and factories.Pb-Fe_2O_3 diagrams are also useful for evaluation of environments.However,considering the greater concentrations of Zn in sediments(80-100 ppm)compared to Pb(20-40 ppm),discrimination for different environments by Zn-Fe_2O_3 diagrams is easier than that offered by Pb-Fe_2O_3 cross plots.
掲載誌名
島根大学地球資源環境学研究報告
22
開始ページ
15
終了ページ
20
ISSN
13439774
発行日
2003-12-27
NCID
AA11455176
出版者
島根大学総合理工学部地球資源環境学教室
出版者別表記
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
資料タイプ
紀要論文
部局
(旧組織)大学院総合理工学研究科
備考
12-14,16+ / 1993+
飯泉滋教授・山内靖喜教授 退官記念特集号
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