专家证据权重法及其在东昆仑地区的应用

证据权重法是基于GIS矿产资源评价的主要方法之一,在东昆仑地区应用该方法后发现其结果和东昆仑地区的总体找(成)矿潜力实际情况不相符,研究后认为其原因是没有考虑东昆仑地区地质研究程度低、研究程度不均一且地质构造背景差异大等客观事实.为此,我们将东昆仑地区的基础地质、区域成矿规律及典型矿床研究等方面取得的认识("知识系统")和"证据权重法"结合起来,提出并建立了一个"专家证据权重法"矿产资源定量预测评价系统,该系统实际上相当于一个专家系统,其根据知识系统对各证据因子赋权重的过程体现了地质专家的思想.我们将该系统应用到东昆仑地区获得了满意的结果,这对其他研究程度低地区进行矿产资源评价工作具有重要的指导和借鉴意义.

EXPERT EVIDENCE METHOD OF WEIGHTING AND ITS APPLICATION IN THE EASTERN KUNLUN MOUNTAIN

Weighting of evidence (WofE) is an important method among those of GIS-based mineral resources assessments. After using this method in the Eastern Kunlun Mountain, it was found that the result did not match with the fact of metallogenic potentials in the area. It was considered that the WofE did not think of the facts that the degree of research was low and unbalanced, and geotectonic settings were so different in the Eastern Kunlun Mountain. Combined knowledge system with WofE, a mineral resource quantitative prospecting and assessing system called "Expert WofE" are proposed and built. The knowledge system means knowledge from geology, regional metallogenetic laws and typical deposits in the studying area. Such system is a typical expert system because the process that geologist specified weights for evidential themes shows their expert thought. Expert WofE is used in the Eastern Kunlun Mountain for gold mineral resource assessment and got satisfied results. Such works will be helpful to do mineral resources assessment in some area where was not explored well.