论文部分内容阅读
在采用Jarque-Bera统计量和Augmented Dickey-Fuller检验法,分别进行正态和稳定性检验的基础上,运用多重分形消除趋势波动分析方法(MF-DFA)和多重分形谱分析方法,研究了山东大尹格庄金矿-290m中段多钻孔Au元素的长程相关性和多重分形特征,并分析多重分形谱曲线的宽度差异和对称性.结果显示:消除二阶多项式非线性趋势后,趋势波动函数Fq(s)与尺度s具有较好幂律关系,广义Hurst指数h(q)是随q的非线性函数,h(2)值均小于1但大于0.5,即具有长程相关性,表明在特定的地质背景下该矿体的发育相对稳定,其与大尹格庄金矿的地质事实相吻合.多重分形谱曲线为非对称状且各有不同,表明该地区的Au元素品位序列具有明显多重分形特征,其多重分形谱函数的形态差异为矿化强度的识别提供依据,从而可为进一步判定矿床富集程度、圈定有利成矿靶区提供指导.
Based on the Jarque-Bera statistic and the Augmented Dickey-Fuller test, the normality and the stability test were respectively carried out. By using the MF-DFA and the multifractal spectrum analysis method, The long-range correlation and multifractal characteristics of multi-bored Au elements in the middle section of Dayingezhuang gold deposit and analysis of the width differences and symmetries of multifractal spectrum curves show that: after eliminating the nonlinear trend of second-order polynomials, the trend fluctuation The generalized Hurst exponent h (q) is a non-linear function of q, and the value of h (2) is less than 1 but greater than 0.5, which means that the function Fq (s) The development of this orebody is relatively stable under certain geological background, which is consistent with the geological facts of Dayingezhuang gold mine.The multifractal curve is asymmetric and has different characteristics, indicating that the Au element grade sequence in this area is obvious The multifractal characteristics and the morphological differences of the multifractal spectrum functions provide the basis for the identification of mineralization intensity, which can provide guidance for further determining the enrichment degree of ore deposits and delineating favorable metallogenic target areas.