主成分分析法解析地气测量元素异常信息  

Using Principal Component Analysis to Process Anomaly of Geogas Measurement Elements

作　　者：罗齐彬 杨亚新[1,3] 金和海 付宸 肖昆 LUO Qi-bin;YANG Ya-xin;JIN He-hai;FU Chen;XIAO Kun(State Key Laboratory of Nuclear Resources and Environment,East China university of Technology,Nanchang,330013,China;Research Institute No.270,CNNC,Nanchang,330200,China;School of Geophysics and Observation&Control Technology,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,南昌330013 [2]核工业二七〇研究所,南昌330200 [3]东华理工大学地球物理与测控技术学院,南昌330013

出　　处：《核电子学与探测技术》2021年第2期214-220,共7页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(41574102、41774134);东华理工大学核资源与环境国家重点实验室开放基金(NRE1921);东华理工大学博士科研启动基金项目(DHBK2019086);江西省自然科学基金(20192BAB202010)资助。

摘　　要：在铀矿或其他金属矿勘探中,元素间的伴生性导致地气测M数据样本往往存在较大的冗余性,利用主成分分析(PCA)算法对相山居隆安地区某已知剖面上所测7种地气元素含量分析数据进行了处理和分析。结果表明,主成分分析将原有7维地气元素数据降至3维,同时保留了原有数据中80%以上的元素异常信息。隐伏铀矿所致地气元素异常分布主要集中在第一主成分上,第二主成分和第三主成分所包含的部分异常信息主要与铀元素伴生性较差的金属元素相关。主成分分析方法则能够有效地降低地气元素含量分析结果中的异常信息冗余性,提高异常解释的准确性和效率。In uranium or other metal deposits prospecting,a certain correlation between analysis elements results in redundant information brought by the geogas measurement data.The analysis data of 7 geogas elements measured on a known section of Xiangshan Julong-an area is processed with principal component analysis(PCA).The research results show that,PCA reduces the dimension of geogas element data from 7 to 3,while retaining more than 80%abnormal elements information of the original data.The anomalous distribution of geogas elements caused by concealed uranium deposits is mainly concentrated on the first principal component,and some of anomalous information contained in the second principal component and the third principal component are mainly related to the metal elements with poor uranium concomitant properties.PCA method can effectively reduce the redundancy of abnormal information in the analysis results of geogas elements content and improve the accuracy and efficiency of abnormal interpretation.

关 键 词：主成分分析 地气测量 隐伏铀矿 异常解释 

分 类 号：TL81[核科学技术—核技术及应用]