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矿床及有关岩石类型的模式图可以用空间分析方法进行研究。在矿床模式图上叠加一由大小和形状相同的单元所构成的格网,这时单元的矿床频数可能满足负二项分布,其方差取决于单元的大小和形状,它可以根据单元频数进行计算,也可以通过图上测量来估计。本文提出点状模式图的某些特征还可以用Neyman-Scott丛聚过程模型确定。文中举例用的陆地矿床二维模式图是新布伦瑞克省 Bathurst的一组火山岩型块状硫化物矿床,该类矿床常常呈线状,沿喷发裂隙延伸。间接的研究方法是对比硫化物矿床与有关的火山岩或其它参变量之间的相互关系。这样就得出了代表矿床产出概率较大的岩石类型或参变量组合的空间统计量。在这种间接方法中,两两岩石类型之间的交叉协方差函数提供了有用的信息。
The patterns of deposits and related rock types can be studied by means of spatial analysis. By superimposing a grid of elements of the same size and shape on the pattern of the deposit, the frequency of the deposit in the element may satisfy the negative binomial distribution, the variance of which depends on the size and shape of the element, which can be calculated from the element frequencies , Can also be estimated by measuring on the map. In this paper, some features of the point-like pattern are also determined by the Neyman-Scott clustering process model. An illustrative two-dimensional model of a terrestrial deposit is a group of volcanic massive sulphide deposits at Bathurst, New Brunswick that are often linear and extend along eruptions. An indirect method of research is to compare the correlation between sulphide deposits and the associated volcanic rocks or other parameters. This yields the spatial statistics for the rock type or parameter combination that represents a greater probability of ore yield. In this indirect method, cross-covariance functions between any two rock types provide useful information.