岩矿测试2017，Vol.36Issue(2)：136-145,10.DOI:10.15898/j.cnki.11-2131/td.2017.02.007
中国南部湿润半湿润丘陵山区不同粒级水系沉积物地球化学特征对比研究
Geochemical Characteristics Comparison of Different Scale Sediments in the Humid and Semi-humid Hilly Area, Southern China
摘要
Abstract
Appropriate sampling grain size is very important for accurate geochemical information and better exploration effects in different landscapes.In order to determine the best sampling grain size of the sediments in the humid and semi-humid hilly landscape,a sampling experiment was carried out.Samples of two scales,-60 and-10-+80,were collected from the Hulesi-Ningguodun area in Southern Anhui Province.40-element high-precision data,which are needed for regional geochemical exploration,were acquired by X-ray Fluorescence Spectrometry(XRF)and Inductively Coupled Plasma-Mass Spectrometry(ICP-MS).Results show that the contents of rock-forming elements in sediments are similar to the background values of regional rocks.Samples with grain size of-10-+80 scale are rich in As,Au,Hg,Mo,Pb and Sb.Samples with grain size of-10-+80 scale have been weakly modified by later surface weathering and reserve the original geochemical characteristics,which are remarkably better than the-60 scale in delineating anomalies of mineralization and reflecting characteristics of ore-related anomalies.Therefore,the-10-+80 scale is preferred for stream sediment surveys in the middle and lower mountains and hilly areas in southern Anhui province,which is meaningful to the choice of stream sediment sample grain size in performing geochemical exploration of similar landscapes in China.关键词
采样粒级/水系沉积物/造岩元素/地球化学特征/湿润半湿润景观区Key words
sampling scale/stream sediment/rock-forming elements/geochemical characteristics/the humid and semi-humid landscape area分类
天文与地球科学引用本文复制引用
陈富荣,史春鸿,梁红霞..中国南部湿润半湿润丘陵山区不同粒级水系沉积物地球化学特征对比研究[J].岩矿测试,2017,36(2):136-145,10.基金项目
中国地质调查局地质调查项目(1212011120938,1212011220592) （1212011120938,1212011220592）
