摘要
以莫桑比克楠普拉地区草原稀树景观区某处为试验区,开展了土壤测量试验工作。这里主要展示了试验区土壤中Au、Ag、Cu、Pb、Zn等18种元素的含量水平,介绍了不同类型土壤各层位的粒级组成特征,研究了这些元素次生富集、贫化特征,并结合地质、重矿物等特征初步探讨了土壤元素含量分布成因。经研究发现:试验区土壤元素含量水平与上地壳土壤元素丰度及我国土壤元素丰度均有较大差异;残坡积土壤中元素含量垂向分布总体规律性明显,表层土壤中Au、Ag、Zn、Li、Nb、Mo、Fe、Ta等8个元素发生次生贫化作用,Cu、Hg、Zr、Si等四个元素发生了明显的次生富集作用,Sn、Cu、Pb、Ta、Sb、K等元素表现出在B层或C层含量较高的特点。该项研究丰富了莫桑比克地球化学基础资料,为进一步研究莫桑比克土壤元素地球化学丰度提供了基础数据,为我国企业在非洲类似景观区开展土壤地球化学测量工作提供了技术参考。
Geochemical soil survey test has been performed in Savanna landscape area of Mozambique.Au,Ag and other 16 elements content in soil and the characteristics of soil grains composition of different horizons in three types soils were showed.The characteristics of enrichment or depletion of 18 elements has been studied,the reason of elements content distribution in soil has been preliminary discussed.Research shows that,the elements＇ content level of test area are clearly different from the crustal abundance also different from the soil abundance of China,the elements vertical variation in residual soil are obvious,such as Au,Ag,Zn,Li,Nb,Mo,Fe and Ta depleting when going down from surface.Meanwhile,Cu,Hg,Zr and Si enriching when going down,however Sn,Cu,Pb,Ta,Sb and K enriched in the B or C layer.These results obtained have enriched the geochemistry Base materials of Mozambique in this paper,which provided basicdata for furtherstudy element abundance of soil in Mozambique,offered reference for China s companies further exploration work in Africa under the same landscape.
出处
《物探化探计算技术》
CAS
CSCD
2015年第3期361-371,共11页
Computing Techniques For Geophysical and Geochemical Exploration
关键词
莫桑比克
土壤测量
元素富集贫化
元素迁移
勘查地球化学
Mozambique
soil survey
elements enrichment-depletion
elements mobilization
exploration geochemistry
