Referactory elements mobility during volcanic weathe-ring: As evidenced by dacite weathering profile in Pingxiang, Guangxi

被引：0

作者：

Gu, Shang-Yi ^{[1
]}

Wan, Guo-Jiang ^{[1
]}

Mao, Jian-Quan ^{[1
]}

Zhang, Qi-Hou ^{[1
]}

机构：

[1] St. Key Lab. of Envrn. Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, China

来源：

Kuangwu Yanshi | 2002年 / 22卷 / 01期

关键词：

Adsorption - Iron oxides - Leaching - Weathering - Zirconium;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The mobility of six kinds of refractory elements for dacite weathering profile in Jiaonong, Guangxi were studied. The results show that elements Ti, Nb and Ta remain immobile during weathering and pedogenesis while Zr, Hf and Th remain immobile during the initial stage of weathering, become moderately enriched during the middle stage of weathering and reach pronounced enrichment during the advanced stage of weathering. The enrichment of Th may be attributed to the adsorption of iron oxides and formation of phosphate mineral during downward migration of Th leached from eroded material. The enrichment of Zr may be related to specific zirconsilicate and zirconophosphate mineral (s) formed by silica and Zr released from above eroded material. However, further research is needed to unravel exact enrichment mechanism of Th, Zr and Hf.

引用

页码：6 / 9