用地球化学块体法评价辽宁省钼矿资源潜力

Molybdenum Resources Potential of Liaoning Province Based on Geochemical Block Method

分别从矿产成因类型、成矿地球化学特征两个方面分析了辽宁省钼矿成矿地质背景,在此基础上,首先基于辽宁省1∶20万化探扫面数据,以0.71×10-6为异常下限共圈定了5个钼地球化学块体(编号分别为I#、II#、III#、IV#、V#);其次通过分析块体内地质特征、矿产资源特征,确定将各地球化学块体的五级子块体作为找矿远景区,并建立了全省钼矿找矿模型;然后应用找矿信息量法筛选出地质、物探、化探等13个找矿标志,并以该类找矿标志为变量,对找矿远景区进行了分类,优选出A级远景区6个、B级远景区9个、C级远景区11个;最后利用地球化学块体法估算出的辽宁省钼矿资源量为87.26万t,可见,全省钼矿资源潜力较大。上述分析对于辽宁省进一步开展钼矿找矿预测工作有一定的参考价值。

The metallogenic geological background of the molybdenum deposits in Liaoning province is analyzed from the two aspects of mineral genesis types and metallogenic geological characteristics. In order to conduct further research of the molybdenum resources potential of Liaoning province,firstly,based on the 1∶ 200 000 geochemical surveying data obtained from regional geochemistry-national reconnaissance project( RGNR) of Liaoning province,5 molybdenum geochemical blocks are delineated( the number as I#,II#,III#,IV#,V#) by using the geochemical anomaly threshold of 0. 71 × 10-6; then,the geological characteristics and mineral resources characteristics of the geochemical blocks are analyzed in detail,the fifth sub-blocks of the five geochemical blocks are taken as the prospecting potential areas,and the prospecting model of the molybdenum deposits in Liaoning province is established; thirdly,the 13 prospecting indicators of geological,geophysical and geochemical are selected by adopting the method of prospecting information contents,taking the 13 prospecting indicators as variables,the prospecting potential areas are divided into 6 A-type prospective areas,9 B-type prospective areas and 11 C-type prospective areas;finally,the geochemical block method is used to estimate the molybdenum resources in Liaoning province,which is 872 600 t,it is show that the molybdenum resources in Liaoning province is huge. The above analysis results in this paper can provide some reference for the further prospecting work of molybdenum deposits in Liaoning province.