隆安县不同地层岩石与土壤中的元素自然含量特征

Characteristics of Natural Contents of Soil and rock elements in Different Stratum of Long'an County

关键词:  地层  岩石、土壤  元素含量  相关性

Key words:  stratum  rock  soil  natrual contents of elements  correlation

摘要:

对隆安县21个地层的20个岩石、21个土壤31种元素含量分析,结果表明,该区土壤中Fe、Al、Zn、V、Ni、As、Se含量高于世界土壤元素背景值,Mn、Cu、B、Mo、Co、Cr、Ga与世界土壤背景值接近,Si、P、K、Na、Ca、Mg、S低于世界土壤背景值,F和Br含量均小于15μg/g,Sn小于0.09μg/g;岩石元素变异系数较大,土壤元素分布相对集中;土壤元素含量与其母岩之间多数相关不显著;多数元素在成土过程中富集;土壤Ni/C₀比值与其母岩之间显著正相关。

Abstract:

The data of 31 elements of rocks and soils from 21 strata in Long'an county,southwest of Guangxi, were sorted out.The average contents of Fe,Al,Zn,V,Ni,As and Se were higher than the background values of elements in soils of the world;Mn,Cu,B,Mo,Co,Cr and Ga were similar;Si,P,K,Na,Ca,Mg,S were lower,F and Br were less than 15 μg/g,Sn was less than 0.09 μg/g.The contents of the elements in rocks were different greatly when expressed by coefficient of variation.There were no correlation for most rocks and soils in element contents.Most elements were relatively enriched in soil forming process.Significant positive correlation was found for the Ni/C₀ between soils and rocks.