Local singularity and S–A methods for analyzing ore-producing anomalies in the Jianbiannongchang area of Heilongjiang,China

作     者：Zhonghai Zhao Kai Qiao Yiwen Liu Xiaomeng Cui Binbin Cheng Shanshan Liang Chenglu Li Zhonghai Zhao;Kai Qiao;Yiwen Liu;Xiaomeng Cui;Binbin Cheng;Shanshan Liang;Chenglu Li

作者机构：College of MiningLiaoning Technical UniversityFuxin 123000China Heilongjiang Institute of Natural Resources SurveyHaerbin 150036China 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2023年第42卷第2期

页      面：360-372页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the Project of the Natural Science Foundation of Liaoning Province(2020-BS-258) the Scientific Research Fund Project of the Educational Department of Liaoning Provincial(LJ2020JCL010) The project was supported by the discipline innovation team of Liaoning Technical University(LNTU20TD-14) the Key Research and Development Project of Heilongjiang Province(GA21A204) 

主　　题：Geochemistry Local singularity S-A method Robust principal component analysis Jianbiannongchang area in Heilongjiang Province 

摘      要：The Heilongjiang Jianbiannongchang area is located at the confluence of the Great and Lesser Xing’an *** area has a complex magmatic and tectonic evolutionary history that has resulted in a complex and diverse geological background for *** this study,isometric logarithmic ratio(ILR)transformations of Au,Cu,Pb,Zn,and Sb contents were performed in the1:50,000 soil geochemical data of the Jianbiannongchang *** principal component analysis(RPCA)was conducted based on ILR *** local singularity and spectrum-area(S-A)methods were used to extract information on mineralogic *** results showed that:(1)the transformed data eliminated the influence of the original data closure effect,and the PC1and PC2 information obtained by applying RPCA reflected ore-producing element anomalies dominated by Au and Cu.(2)The local singularity method can enhance the information of the local strong and weak slow *** performing local singularity analysis on PC1 and PC2,the obtained local anomalies reflected the local singularity spatial anomaly patterns related to Cu and Au mineralization in this area,which is an effective method for trapping ore-producing anomalies.(3)Furthermore,the composite anomaly decomposition of PC1 and PC2 was performed using the S-A method,and the screened anomalous and background fields reflect the ore-producing anomalies related to Cu and Au *** information is in agreement with known Cu and Au mineralization.(4)The geochemical anomalies with mineralization potential were obtained outside the known mineralization sites by integrating the information of oreproducing anomalies extracted by the local singularity and S-A methods,providing the theoretical basis and exploration direction for future exploration in the study area.