摘要
采样层位的确定、样品粗加工粒级和指示元素选择是沟系土壤地球化学测量试验研究的重要内容。本次研究选取灰岩、玄武岩、砂页岩风化土壤的表土层、淀积层、母质层样品为研究对象,样品常温晾干后依次过20目、40目、60目、80目沈阳套筛进行粗加工,分析样品元素含量。通过研究土壤机械粒级组成和元素在不同层位、不同粒级土壤中的含量特征,确定了本区进行土壤地球化学测量时采样层位为土壤淀积层上部,样品粗加工粒级为-20～+40目粒级,指示元素以Au、Sb、As、Cu为主。试验结果确保在贵州普安—晴隆地区运用沟系土壤地球化学测量所圈定的地球化学异常成果真实、有效。
Determination of sampling layer,rough machining size fraction of samples and indicator elements are important contents for experimental study of soil geochemical survey of valley,directly related to the validity of the soil geochemical anomalies for using soil geochemical survey of valley to mine searching.Studied the weathering soil from limestone,basalt and shales sandstone,dried soil geochemical samples of three horizons（epipedon,illuvial horizon,parent material horizon） at room temperature.Samples sieving for Shenyang layer vibrating screen of 20,40,60 and 80 meshs.determined element content of samples.An experiment study on soil mechanical composition and element content of soil measured for three horizons of four size fractions （-20 ～＋40,-40～＋60,-60～＋80,-80） in the Puan-Qinglong antimony-gold exploration area,determined upper part of illuvial horizon for sampling layer in the Puan-Qinglong antimony-gold exploration area,rough machining size fraction of samples is from 20 to 40 mesh fraction.The Au,Sb,As,Cu elements had been mainly considered the indicator elements.Results to ensure that ,soil geochemical anomalies from soil geochemical survey of valley are effective for geological prospecting in the Puan-Qinglong antimony-gold exploration.
出处
《地质通报》
CAS
CSCD
北大核心
2010年第11期1712-1720,共9页
Geological Bulletin of China
基金
国家财政部资补项目(编号:295050028-6)
教育部新世纪人才支持计划项目(编号:NCE-04-917)联合资助
关键词
沟系土壤地球化学测量
元素富集
土壤层位
粒级
黔西南
soil geochemical survey of valley
element enrichment
soil horizon
size fraction
southwestern Guizhou Province
