区域地球化学评价中变异系数校正参数的意义  

Significance of the Correction Parameters of Variation Coefficient in Regional Geological Evaluation

作　　者：刘明义[1,2] 张晶 孟广路[1] 胡立[3] LIU Mingyi;ZHANG Jing;MENG Guanglu;HU Li(Xi'an CenterofGeologicalSurvey,ChinaGeologicalSurvey,Xian,Shaanxi 710054,China;DepartmentofGeology,NorthwesternUniversity,Xian,Shaanxi 710069,China;ShaanxiGeologicalExplorationInstituteofGeologyandMineBureau,Xian,Shaanxi 710075,China)

机构地区：[1]中国地质调查局西安地质调查中心,陕西西安710054 [2]西北大学地质学系,陕西西安710069 [3]中化地质矿山总局陕西地质勘查院,陕西西安710075

出　　处：《现代地质》2018年第5期1074-1079,共6页Geoscience

基　　金：中国地质调查局基础性公益性地质矿产调查二级项目"乌兹别克斯坦;塔吉克斯坦及邻区矿产资源潜力评价"(121201011000150010)

摘　　要：通过对我国新疆西天山各地球化学区数据的归纳和研究,计算西天山12种常见成矿元素在各地球化学区的富集系数,提出校正系数公式,并将变异系数进行合理的校正与排序。与实际矿床和矿点结合,验证校正系数的正确性和适用性,预测元素成矿有利顺序和规律,总结出西天山富集系数与变异系数在成矿中的制约关系。该方法实现了不同成矿元素之间成矿条件的对比,拓宽了地球化学参数的适用性,提高了在勘探程度较低的地区地球化学评价方法的准确性,为地球化学评价提供科学依据。By summarizing and studying the data of geochemical divisions in the west Tianshan of Xinjiang,China,the enrichment coefficients of 12 common oreforming elements are calculated;the correction coefficients formula is put forward,and variation coefficients are reasonably corrected and sorted.Combining with the case deposit and mineralized points,the validity and applicability of correction coefficients is confirmed and the restrictive relationship between enrichment coefficients and variation coefficients in oreforming process is summarized.By this way,it is possible to compare the ore conditions among different oreforming elements and the applicability of geochemical parameters is broadened.Besides,the study improves the accuracy of geochemical evaluation methods in low exploration degree areas and provides scientific basis for geochemical evaluation.

关 键 词：校正参数 变异系数 地球化学方法 地球化学区 新疆西天山 

分 类 号：P595[天文地球—地球化学]