庐江顺港地区化探异常分形分析  

Fractal analysis of data abnormities in geochemical exploration in Shungang,Lujiang

作　　者：徐庆安[1] 张千明[1] 汪龙虎[1] 洪江生[1] 

机构地区：[1]安徽省地质矿产勘查局327地质队,安徽合肥230011

出　　处：《合肥工业大学学报（自然科学版）》2016年第9期1260-1265,共6页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省地质矿产勘查基金资助项目([2012]-2-19)

摘　　要：庐江顺港地区地质背景复杂,构造活动多期。在综合找矿信息方面,化探数据量大,与矿化有关的微量元素富集规律和空间分布特征具有多维分形的特点,针对化探数据处理,传统方法是采用均值加减几倍离差的方法,仅仅考虑了基本的数理统计特征,忽略了元素在迁移过程中物质与能量的交换。文章以庐江顺港地区为例,通过对土壤的化探数据进行统计分析,采用"含量-面积"模型的分形方法进行研究,对照地质图,得出铜金的富集地层,以MapGIS为工具求出的异常下限和传统方法的计算结果相近。研究认为分形处理的方法在理论上更优越,处理的结果更精确,尤其对于大比例尺的地质调查与矿产调查的钻孔定位效果更好。Shungang is an area of complex geological background and multistage tectonic activities in Lujiang area .In terms of comprehensive prospecting information ,the number of exploration data is huge ,and the trace elements’ rules of mineralization enrichment and spatial distribution have multi‐dimensional fractal char‐acteristic .With regard to the geochemical data processing ,the traditional times mean plus or minus deviation method considers only the basic features of mathematical statistics ,ignoring the exchange of matter and ener‐gy elements during the migration .In this paper ,taking the district of Shungang ,Lujiang as an example , through the statistical analysis of soil geochemical data and based on the content‐area fractal method ,the cop‐per‐gold enrichment formations are drawn by comparing to the geological map .The anomaly threshold ob‐tained by using MapGIS is similar to that by traditional methods .The method of fractal process is theoretical‐ly superior ,and has more precise result of the treatment .And it has better results in drilling positioning in large‐scale geological survey and mineral survey .

关 键 词：地球化学 分形理论 异常值下限 因子分析 庐江 

分 类 号：P632.1[天文地球—地质矿产勘探]