分形方法在海南屯昌地区地球化学找矿中的应用

Fractal Method of Geochemical Prospecting in th Tunchang area,Hainan Province

化探异常下限的确定是勘查地球化学有效地应用于矿产勘查的一个关键性环节。传统的异常下限计算方法是以地球化学元素含量数据服从正态或对数正态分布为前提,而本文采用的元素含量-总量多重分形计算异常下限的方法,则基于地球化学变量服从分形与多重分形分布的理论与方法。作者以海南屯昌某测区化探数据为例,运用传统元素含量对数正态分布和元素含量-总量多重分形两种计算模型确定了测区主要指示元素的异常下限并圈定、对比了其化探异常图。本区槽井探对化探异常的揭露表明,采用元素含量-总量的分形方法确定化探异常下限的尝试是成功而有效的。

Geochemical anomaly minimum is a key part in exploration geochemistry applied to mineral exploration. The traditional calculation method of geochemical anomaly minimum is based on the geochemical element content data obey normal or lognormal distribution as a precondition. And the elements of this paper, the total muhifractal calculation of abnormal minimum, is based on the geochemical variables obey fractal and multi-fractal distribution theory and method. The author uses the geochemical data of a measured area in Hainan, for example. Using the traditional elements in lognormal distribution and element contents - total multifractal these two computational models to determine the main indicator elements＇ anomaly minimum, and at the same time, to delineate and compare the geochemical anomaly map. The exposing situation of geochemical anomaly of the trenching and shallow wells of this district indicates that the element contents - the total fractal method to attempt to determine the geochemical anomaly minimum is successful and effective.