摘要
笔者通过对大兴安岭北段呼中地区1∶20 000土壤测量Au、Ag、Cu、Pb、Zn、Mo、As、Bi等8种热液元素标准化后的978件样品使用主成分分析法抽取因子,得到3个特征值> 1的主因子(CuPb-Zn-Ag;Au-Mo;Bi-As),但不能合理做地质解释;经过最大方差法的因子旋转后,得到3个新的主因子(Ag-Pb-Zn;Cu-Mo-Bi;Au-As),在地质解译上更具优势。新的主因子组合指示研究区内存在一热液系统,从含矿热液中心到远端,自南向北依次有高、中、低温元素沉淀,在工程查证中见到相应元素的矿化体产出。同时根据因子得分值与地质体的关系(主因子强度空间平面分布图),将成矿时间界定在早侏罗世与晚侏罗世之间。
Based on the 1∶20000 soil survey of eight hydrothermal elements(Au,Ag,Cu,Pb,Zn,Mo,As,Bi)in Huzhong area of northern Great Xing an Range,factors of 978 standardized samples were extracted by principal component analysis.Three principal factors(Cu-Pb-Zn-Ag;Au-Mo;Bi-As)with eigenvalues greater than 1 were obtained,but they could not be reasonably interpreted.Three new principal factors(Ag-Pb-Zn;Cu-Mo-Bi;Au-As)were obtained after factor rotation of maximum variance method,which have more advantages in geological interpretation.It indicates that there existed a hydrothermal system in study area.From the ore bearing hydrothermal center to the far end,precipitation of high,medium and low temperature elements occurred from south to north in turn.Ore bodies of corresponding elements can be seen by engineering verification.Meanwhile,according to the relationship between factor score and geological body(spatial distribution map of principal factor intensity),the metallogenic time is defined between the Early Jurassic and Late Jurassic.
作者
史冬岩
张坤
张玉鹏
高勇
唐伟
吕明奇
石金国
SHI Dong-yan;ZHANG Kun;ZHANG Yu-peng;GAO Yong;TANG Wei;LYU Ming-qi;SHI Jin-guo(Heilongjiang Institute of Natural Resources,Harbin 150036,China;Heilongjiang Geology and Mineral Resources Investment Group Co.Ltd.,Harbin 150036,China;Institute of Geosciences and Resources,China University of Geosciences,Beijing 100083,China;The Fifth Geological Survey Institute of Heilongjiang Province,Harbin 150036,China)
出处
《世界地质》
CAS
2021年第1期193-202,209,共11页
World Geology
基金
黑龙江省自然资源厅公益类资助项目(GY-2018001)
黑龙江省资源补偿费项目(KCZX-SDKC-2017012)资助。
关键词
大兴安岭北段
土壤测量
因子分析
旋转因子载荷矩阵
northern Great Xing an Range
soil survey
factor analysis
rotation factor load matrix
