张家口地区矿化元素异常信息提取与集成  

The extraction and integration of geochemical anomaly information from Zhangjiakou area, Hebei Province

作　　者：李随民[1] 崔美娟 魏明辉[2] 韩腾飞 李永峰[4] 韩玉丑[4] 陈树清[2] 李玉红[2] 李紫烨[1] 

机构地区：[1]石家庄经济学院,河北石家庄050031 [2]河北省地矿局第三地质大队,河北张家口075000 [3]河北省地质调查院,河北石家庄050081 [4]河北省地矿局,河北石家庄050081

出　　处：《中国地质》2013年第6期1925-1934,共10页Geology in China

基　　金：河北省国土资源厅项目(2011055548和2013045650)共同资助

摘　　要：本文以局部奇异性方法为手段,结合证据权模型中点-面空间相关关系显著性指标t值,确定了成矿元素局部奇异值最优的α阈值,据此圈出了单元素异常分布区域。同时采用基于广义自相似性原理的S-A方法对复合异常进行分解,得出区域背景场和异常场的空间分布。研究显示,上述方法圈定的异常区域与已知矿床及区域成矿条件吻合程度较高,能有效地提取和增强元素弱异常,所圈异常区域可靠程度较高,具有找矿意义。Using the local singularity method, the authors determined the optimal alpha threshold based on the point-surface space related significant index t value of the weight of the evidence method, and delineated the distribution of single element anomalies. At the same time, based on the generalized self-similarity principle, the authors used the S-A method to decompose the complex anomaly, and detected the spatial distribution of the regional background field and the anomalous field. Because the delineated anomalies are well consistent with known Pb-Zn-Ag polymetallic deposits, they can provide geochemical evidence for delineating target areas. Research shows that the local singularity method and the fractal filtering method can effectively enhance the weak anomalies, extract the ore-forming anomalies, and help explore concealed ore bodies in Zhangjiakou area.

关 键 词：多重分形技术 弱异常提取 张家口 

分 类 号：P595[天文地球—地球化学]