| The Geochemical Features and Evolution of Laterite in the Karst Areas of Guizhou Province |
| |
| 作者姓名： | 朱立军 林进也 |
| |
| 作者单位： | GuizhouInstituteofTechnology,Guiyang,550003 |
| |
| 摘 要： | Guizhou is one of the dominating karst regions,where laterite is widespread,in China.Seventy-two laterite samples were taken from twelve laterite sections in the karst areas of Guizhou Province,which are possessed of typical subtropical karst geomphological and ecological environmental features and have evolved completely from dolostones and limestones.In terms of the major,trace and REE deta for thd samples this paper discusses the geochemical characteristics of laterite in the karst areas with an attempt to disclose the geochemical process and evolutionary rule of laterite formation.There have been involved three important pedogenetic geochemical precesses in the formation of laterite in the karst areas:(1)enrichment of silicon and aluminum and depletion of calcium and magnesium;(2)enrichment of iron and manganese;and(3) enrichment of aluminum and depletion of silicon.During the formation and evolution of laterite,obvious enrichment and differentiation of trace elements such as Cu,Pb,Zn,Ni,Co,Cr,Pb,F,Cl,and As can be observed,but for the rare-earth elements,their enrichment is remarkable against a weak differentiation.The REE distribution patterns in the laterite are similar to those of its parental carbonate rocks.
|
| 关 键 词： | 红土 土壤地球化学特征 喀斯特地区 稀土元素分布模式 贵州 |
The geochemical features and evolution of laterite in the karst areas of Guizhou Province |
| |
| Zhu Lijun,Lin Jinye.The Geochemical Features and Evolution of Laterite in the Karst Areas of Guizhou Province[J].Chinese Journal of Geochemistry,1996,15(4):353-363. |
| |
| Authors: | Zhu Lijun Lin Jinye |
| |
| Institution: | (1) Guizhou Institute of Technology, 550003 Guiyang |
| |
| Abstract: | Guizhou is one of the dominating karst regions, where laterite is widespread, in China. Seventy-two laterite samples were
taken from twelve laterite sections in the karst areas of Guizhou Province, which are possessed of typical subtropical karst
geomorphological and ecological environmental features and have evolved completely from dolostones and limestones. In terms
of the major, trace and REE data for the samples this paper discusses the geochemical characteristics of laterite in the karst
areas with an attempt to disclose the geochemical process and evolutionary rule of laterite formation. There have been involved
three important pedogenetic geochemical precesses in the formation of laterite in the karst areas: (1) enrichment of silicon
and aluminum and depletion of calcium and magnesium; (2) enrichment of iron and manganese; and (3) enrichment of aluminum
and depletion of silicon. During the formation and evolution of laterite, obvious enrichment and differentiation of trace
elements such as Cu, Pb, Zn, Ni, Co, Cr, Rb, F, Cl, and As can be observed, but for the rare-earth elements, their enrichment
is remarkable against a weak differentiation. The REE distribution patterns in the laterite are similar to those of its parental
carbonate rocks.
This project was jointly supported by the National Natural Science Foundation of China and the State Key Laboratory of Environmental
Geochemistry, Chinese Academy of Sciences. |
| |
| Keywords: | laterite pedogenic geochemistry karst region |
| 本文献已被 维普 SpringerLink 等数据库收录！ |
|
