便携式能量色散X射线荧光光谱仪在新疆东天山浅钻化探异常查证中的应用  

Application of Minipal 4 Portable Energy Dispersive X-ray Fluorescence Spectrometer in the Verification of Geochemical Anomaly Delineated by Shallow Hole Drill Core in Eastern Tianshan

作　　者：杨帆[1,2] 郝志红[1] 刘华忠[1] 郭志娟[1] 王徽[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《岩矿测试》2015年第6期665-671,共7页Rock and Mineral Analysis

基　　金：国土资源地质大调查项目(1212011220598;12120113101000);国土资源部公益性行业科研专项(201411024)

摘　　要：便携式能量色散X射线荧光光谱仪(EDXRF)具有大型XRF光谱仪的分析性能,在矿产资源勘查中具有广阔的应用前景,特别是在勘查难度大、找矿工作周期长的覆盖区的现场快速分析具有重要意义,但在野外快速分析方面亟需进一步开发。本文采用手工压制样片,建立了Minipal 4便携式能量色散XRF光谱仪现场测定新疆东天山浅覆盖区浅钻化探样品中的铜铅锌砷钴镍锰7种元素的野外快速分析方法,各元素的检出限分别为2、2、1.5、2、2、2、6μg/g,精密度(RSD,n=12)小于4.7%。本方法能在浅覆盖区实施有效的地球化学样品分析,数据成图效果与实验室分析数据成图效果接近,可快速指导浅钻化探扫面和异常查证工作,缩短了工作周期,提高了矿产资源勘查效率。A portable Energy Dispersive X-ray Fluorescence Spectrometer（ EDXRF） has similar properties to an X-ray Fluorescence Spectrometer in the geological laboratory. EDXRF has a broad application prospect in the mineral exploration and is particularly suitable for in situ analysis at areas with a difficult and long prospecting period. However,further developments of rapid in situ analysis are necessary. A method for rapid determination of Cu,Pb,Zn,As,Mn,Co and Ni by XRF in the field has been proposed. Samples were collected by a vehiclemounted drilling rig in the shallow overburden areas in the eastern Tianshan area of the Xinjiang Uygur Autonomous Region. Sample powder pellets were pressed manually. The determination limits of the method for Cu,Pb,Zn,As,Mn,Co and Ni are 2,2,1. 5,2,2,2 and 6 μg / g,respectively. The precision（ RSD,n = 12） is less than4. 7%. This method can be used to analyze geochemical samples. The data of in situ rapid analysis was evaluated by comparing with that obtained from the geological laboratory. The geochemical maps of elements drawn by the two types of analytical data were completely consistent. This method can rapidly analyze geochemical samples in the field,decreasing the time of verification of geochemical anomaly and improving geochemical exploration efficiency.

关 键 词：浅覆盖区 浅钻化探样品 现场分析 地球化学异常查证 便携式能量色散X射线荧光光谱仪 

分 类 号：P62[天文地球—地质矿产勘探] O657.31[天文地球—地质学]