GIS支持下的证据权法在胶东金矿集中区预测中的应用  

Application of the Evidence Wright Method to the Prognosis of Mineral Resources in Jiaodong Gold Ore Concentration Area

作　　者：杨茂森[1,2] 黎清华[3] 杨海巍[4] 

机构地区：[1]中国地质大学研究生院 [2]山东省鲁地矿业有限公司,山东济南250013 [3]中国地质调查局宜昌地质矿产研究所 [4]河北电力勘测研究设计院

出　　处：《地球学报》2005年第5期487-491,共5页Acta Geoscientica Sinica

基　　金：国家重点基础研究项目(编号:G1999043207-3)资助。

摘　　要：本文在综合分析胶东矿集区各成矿异常信息规律的基础上,运用证据权法对胶东金矿集区的各种控矿异常进行深入分析,共提取构造、地层、岩浆岩(岩脉)、重磁等13种证据权因子,按照1 km×1 km的网格,借助GIS共将该矿集区划分为9 346个有效网格,按照后验概率将其划分了4级(其中Ⅰ级为0.667～1;Ⅱ级为0.405～0.667;Ⅲ级为0.200～0.405;Ⅳ级为0～0.200),并将Ⅲ级以上定为找矿有利靶区.为胶东矿集区的下一轮成矿预测提出了新的找矿思路和找矿前景.Using the Evidence Wright Method （EWM）, the authors made an analysis of Jiaodong gold deposits concentration area （GDC） on the basis of summarizing and analyzing all kinds of geo-anomalies. 13 kinds of evaluation factors, such as magmatic rock （vein） anomaly, stratigraphic anomaly, rupture and structure anomaly, and gravity and aeromagnetic anomaly, were selected for EWM analysis. The Jiaodong GDC was divided into 9 346 units by GIS at the scale of 1 km～ 1 km. According to the value of posterior probability, these units were in tum classified into four grades （ Ⅰ -grade： 0. 667～ 1;Ⅱ -grade： 0. 405 ～0. 667; Ⅲ-grade： 0. 200～0. 405; Ⅳ-grade： 0～0. 200）, with Ⅰ -grade, Ⅱ -grade and Ⅲ-grade areas defined as ore potential areas. The results indicate that the EWM is effective in analyzing the Jiaodong GDC resource potentials and thus contributes to the evaluation of Jiaodong GDC resources.

关 键 词：GIS 证据权法 胶东矿集区 成矿预测 金矿集中区 胶东 应用 异常信息 找矿前景 矿集区 

分 类 号：P618.510.2[天文地球—矿床学] P612[天文地球—地质学]