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.
出处
《地球学报》
EI
CAS
CSCD
北大核心
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。
