Why was iron lost without significant isotope fractionation during the lateritic process in tropical environments?

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• 作者：Miao Li^a ; Yong-Sheng He^b ; Jin-Ting Kang^a ; Xiao-Yong Yang^a ; Zhi-Wei He^a ; Hui-Min Yu^a ; Fang Huang^a ; ^{fhuang@ustc.edu.cn}
• 关键词：Tropical weathering ; Laterite ; Iron isotope ; Fe cycling
• 刊名：Geoderma
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：290
• 期：Complete
• 页码：1-9
• 全文大小：1212 K
• 卷排序：290

文摘

Fe isotope composition of laterites from Surigao, South Philippines was studied. The laterite profile depicts limited Fe isotope fractionation, reflecting a complete and in situ oxidation before Fe migration. Significant loss of Fe in laterites suggests that Fe was likely lost via ferric Fe colloids. Fe isotope variations in soils help identify soil evolution processes under different climates.