铜陵矿集区断裂分形与多重分形特征  

Fractal and Multifractal Characteristics of Regional Fractures in Tongling Metallogenic Area

作　　者：孙涛[1] 李杭 吴开兴[1] 陈陵康[1] 刘卫明[1] 胡紫娟 SUN Tao;LI Hang;WU Kaixing;CHEN Lingkang;LIU Weiming;HU Zijuan(School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《有色金属工程》2018年第4期111-115,共5页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(41602335)

摘　　要：铜陵矿集区是我国重要的有色金属生产基地,断裂构造控制了区域岩浆侵入和成矿作用,为了定量表征区域断裂的复杂度及其对成矿的贡献,分别采用了计盒维数法和多重分形谱计算了全区和4个子区域的断裂分形参数。结果表明,研究区的断裂在0.1~3 km的尺度内具有良好的自相似性,盒维数为1.29。4个子区域多重分形谱宽Δα的大小排序为I区>II区>III区>IV区,Δα的大小关系与区域实际成矿有利度的强弱关系高度吻合。断裂的多重分形谱宽Δα可作为区域成矿预测的一个量化指标,本区形成大规模铜多金属矿化的断裂临界Δα应在1.35左右。The Tongling metallogenic area is an important non-ferrous metal production base in China. The fault structure controls regional magmatic intrusion and metallogenesis. In order to quantitatively characterize the complexity of regional fractures and their contribution to metallogenic process,the box-counting dimension method and multifractal spectrum are applied to calculate fractal parameters of fractures in the whole area and four subareas. The results show that the fractures in Tongling area have a good self-similarity in the scale ranging from 0. 1 to 3 km,and the box dimension is1. 29. The order of the multifractal spectrum widths Δα of the four sub-areas is I〉 II 〉III〉 IV in the study area. The relationship between the size of Δα and the strength of the area ＇s actual metallogenic prosperty is highly consistent. The multifractal spectrum width Δα of fractures can be employed as a quantitative index of regional metallogenic prediction. The critical spectrum width Δα for large-scale copper polymetallic mineralization in this area should be around 1. 35.

关 键 词：铜陵矿集区 分形 盒维数 多重分形谱 

分 类 号：P628[天文地球—地质矿产勘探]