分形方法在金矿化时空结构分析中的应用

摘要

以川西北地区微细浸染型金矿为例，采用分形方法探讨了 金矿化的时空结构特征。研究表明，分数维D值的大小能表征金矿化品位分布的复杂性 ，成矿过程中相关元素组合存在相似的分形结构。利用主成矿元素及相关元素品位数据的分 形结构特征可以指示成矿期次，厘定成矿演化的时间结构,利用地球化学数据的二维空间序 列的R/S分析方法，可以较精确有效地厘定金矿化的空间结构特征。分形 方法在矿化时空结构分析中有着极为广阔的应用前景。%This paper takes the fine disseminated gold deposit in the northwest Sichuan Pr ovince as an example to illustrate the fractal delineation and characterization of the temporal and spatial structures of the gold mineralization.The research r esults show that the size of the fractal D value can be used to characterize the complexity of the grade distribution of the gold mineralization,and that th e similar fractal structure is present in the correlated element assemblage duri ng the mineralization.The fractal structures of the grade data for the host mine ralized elements and correlated elements may be used to indicate the mineralizat ion periods and times and to delineate the temporal structure for the evolution of the mineralization.In addition,the R/S analytical method for the two-dim ension spatial sequence of the geochemical data can be applied to the relatively accurate and effective delineation of the spatial structure of the gold mineral ization.The fractal method will be of wide application to the analysis of the te mporal and spatial structure of the mineralization.