云南麻栗坡地区成矿元素的多重分形特征与成矿预测

对麻栗坡地区1∶5万水系沉积物测量数据的统计分析表明,W、Sn、Pb、Zn、Cu等主要成矿元素不完全服从正态分布和对数正态分布,而表现出多重分形结构特征。因此,采用传统的地质统计学方法提取异常显然不能客观地反映区域的成矿元素分布特征。本文引用了"C-A"多重分形模型来研究该地区成矿元素特征,并有效提取各元素异常下限值,结合区域成矿地质背景,对区内成矿潜力进行初步预测。实践表明,分形方法所提取的剩余异常与研究区的矿产分布较为相符,较好地反映了研究区成矿元素分布规律,为研究区成矿预测提供了依据。

Multifractal characteristics and metallogenic prognosis of the ore-forming elements in the Malipo region,Yunnan

The statistical analyses for the stream sediment samples(scale 1∶50 000) from the Malipo region,Yunnan show that the main metallic elements W,Sn,Pb,Zn and Cu display not the normal or log-normal distribution but the multifractal distribution.The "C-A"(content-area) multifractal model is presented here to obtain the threshold values of individual elements from 7950 samples of stream sediments.The distribution of residual anomalous values based on the multifractal model apparently represents the distribution ...