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    滇东地区深层次Pt-Cu-Au矿化异常定量提取与评价

    黄静宁 赵鹏大

    黄静宁, 赵鹏大, 2009. 滇东地区深层次Pt-Cu-Au矿化异常定量提取与评价. 地球科学, 34(2): 365-374.
    引用本文: 黄静宁, 赵鹏大, 2009. 滇东地区深层次Pt-Cu-Au矿化异常定量提取与评价. 地球科学, 34(2): 365-374.
    HUANG Jing-ning, ZHAO Peng-da, 2009. Quantitative Extraction and Estimation of Conceal Mineralization Anomalies of Pt-Cu-Au in Eastern Yunnan Province. Earth Science, 34(2): 365-374.
    Citation: HUANG Jing-ning, ZHAO Peng-da, 2009. Quantitative Extraction and Estimation of Conceal Mineralization Anomalies of Pt-Cu-Au in Eastern Yunnan Province. Earth Science, 34(2): 365-374.

    滇东地区深层次Pt-Cu-Au矿化异常定量提取与评价

    基金项目: 

    国家高技术研究发展计划863项目 2006AA06Z113

    国家自然科学基金项目 40772197

    国家科技支撑计划项目 2006BAB01A03

    详细信息
      作者简介:

      黄静宁(1982-), 女, 在读博士研究生, 矿产普查与勘探专业.E-mail: hjn82@126.com

    • 中图分类号: P628

    Quantitative Extraction and Estimation of Conceal Mineralization Anomalies of Pt-Cu-Au in Eastern Yunnan Province

    • 摘要:

      滇东地区是我国Cu-Au-PGE重要的成矿远景区.采用因子分析、地质统计学和多重分形S-A滤波等方法对滇东地区复杂地质背景下的不同层次的Pt-Cu-Au矿化异常进行定量提取与评价.结果表明: (1) 因子分析结果揭示滇东地区存在3种元素组合①Cu-Pd-Co-Pt-V-Cr-Ni、②Sb-As-U-Mo、③Pb-Ag-Zn-W-Sn-As-Au, 它们分别代表了位于扬子地块的二叠纪峨嵋山玄武岩、位于华南褶皱系含碳质的沉积建造和以有色金属矿化为代表的热液矿化元素组合特征; (2) 变差函数分析表明Pt、Cu、Au含量在NE向(9°~18.6°) 上变化最连续, 元素含量变化的最大变程范围约95km; 泛克里格法揭示了Pt、Cu、Au含量在区域上变化具有明显的裂控-岩控特征; (3) 多重分形滤波法则细致地刻画了滇东地区与矿化有关的局部异常特征, 有效地提取了Pt、Cu、Au隐蔽矿化异常信息, 其结果可作为圈定Pt-Cu-Au找矿靶区的重要依据; (4) 不同的数学方法可用以解决不同层次的地质成矿问题, 因子分析和地质统计学等线性方法可研究区域成矿地质背景、揭示成矿元素及其元素组合在区域上的空间变化特征, 而S-A滤波等非线性方法能够有效提取深层次局部矿化异常信息.

       

    • 图    滇东地质矿产简图

      Fig.  .  Simplified geological map of eastern Yunnan Province

      图    F1、F2、F3因子得分图

      Fig.  .  Factor score maps of F1, F2 and F3

      F1=Cu-Pd-Co-Pt-V-Cr-Ni; F2=Sb-As-U-Mo; F3=Pb-Ag-Zn-W-Sn-As-Au

      图    泛克立格法获取的Pt、Cu、Au区域地球化学异常

      Fig.  .  The regional Pt, Cu, Au anomalies obtained by universal Kriging

      a.Pt (10-9); b.Cu (10-6); c.Au (10-9)

      图    S-A法获取的Pt、Cu、Au异常

      Fig.  .  Local Pt, Cu, Au anomalies obtained by S-A method

      表    因子正交旋转载荷

      Table  .   Orthogonal rotation factor loadings

      表    Pt、Cu、Au统计参数

      Table  .   Statistical parameters of Pt, Cu and Au

      表    拟合半变差函数参数

      Table  .   Fitting semi-variogram parameters of Pt, Cu and Au

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