Elucidating the complexity of metallogenic elements based on multifractal detrending moving average analysis
Elucidating the complexity of metallogenic elements based on multifractal detrending moving average analysis
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基于多重分形去趋势移动平均分析阐明成矿元素的复杂性
DOI：
10.1016/j.physa.2019.123296
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发表时间：
2020-03
影响因子：
3.3
通讯作者：
Lai Jiajing
中科院分区：
文献类型：
--
作者：
Wan Li;Zeng Xiangjian;Lai Jiajing
成矿元素分布通常呈现高度不规则的空间格局和尺度依赖性变化。在本研究中，采用多重分形去趋势移动平均（MFDMA）模型来描述中国胶东省上庄矿床不同成矿元素分布的奇异谱并研究元素浓度的非均质性。结果表明，六种成矿元素表现出多重分形尺度。 Au 和 Cu 的多重分形光谱是左偏的，而 Ag、Pb、Zn 和 Hg 的多重分形光谱接近对称。因此，多重分形谱的形状可以为成矿潜力的研究提供方向。值得注意的是，Au和Cu分布不均匀，多重分形特征强于其他差异显着的元素，揭示矿体分布明显不均匀，膨胀和收缩现象突出。相比之下，Ag 是弱多重分形且几乎是单一分形，表明几乎没有矿化区域。当多重分形的来源通过长程相关性和宽厚尾分布两个因素来量化时，我们发现Ag的多重分形结构是由于厚尾概率密度函数，而其他元素的多重分形结构是由于这两个因素。 (C) 2019 Elsevier B.V. 保留所有权利。
Metallogenic element distributions generally present highly irregular spatial patterns and scale-dependent variations. In the present study, the multifractal detrending moving average (MFDMA) model is applied to describe the singularity spectrum of different metallogenic element distributions and study the heterogeneity of element concentrations in the Shangzhuang deposit, Jiaodong Province, China. The results show that six metallogenic elements exhibit multifractal scaling. The multifractal spectra of Au and Cu are left-deviated, while Ag, Pb, Zn, and Hg are close to symmetric. Hence, the shape of the multifractal spectrum may give directions to study the ore-forming potential. Notably, Au and Cu are unevenly distributed with stronger multifractal characteristics than other elements with significant difference, revealing that the distributions of orebodies are significantly inhomogeneous and that inflation and contraction phenomena are prominent. In contrast, Ag is a weak multifractal and nearly a single fractal, suggesting barely mineralized zones. When the sources of multifractality are quantified by two factors, long-range correlations, and broad fat-tail distributions, we find that the multifractal structure of Ag is because of the fat-tail probability density function, and the multifractal structure of the other elements is due to both factors. (C) 2019 Elsevier B.V. All rights reserved.
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