地球化学块体的方法技术在山东金资源潜力预测中的应用  

The Application of Geochemical Blocks Methods to Gold Resources Assessment in Shandong Province

作　　者：刘大文[1] 谢学锦[1] 严光生[2] 连长云[2] 王全明[2] 

机构地区：[1]国土资源部地球物理地球化学勘查研究所,河北廊坊065000 [2]中国地质调查局发展研究中心,北京100083

出　　处：《地球学报》2002年第2期169-174,共6页Acta Geoscientica Sinica

基　　金：国家攀登项目B 85 34;国家重点基础研究项目 (G19990 432 15 );地质大调查项目"中国东部地球化学块体内资源潜力预测"资助

摘　　要：山东的化探扫面工作已经结束了 13a,积累了数十万的化探资料。作者尝试用地球化学块体的方法技术来挖掘这些资料的潜在价值。因此 ,对山东全省Au的资源潜力进行了预测 ,确定了圈定山东地球化学块体的下限值为 2 .5ng/g ,圈出了2个地球化学块体和数十个区域异常。统计计算了 2个地球化学块体和 8个区域异常的参数特征 ,计算出 10 0 0m厚岩块总的Au供应量为 4192 36t,根据所确定的成矿率 0 .90 %来预测 5 0 0m和 10 0 0m深度内这 2个地球化学块体和 8个区域异常所覆盖的 15 6 31km2 的范围内的Au的资源潜力为 12 49t和 2 5 2 2t。The Regional Geochemistry-National Reconnaissance project (RGNR) in Shandong Province was completed in 1989, with more than 900 thousand high quality geochemical data obtained. This paper tries to use a new method, the Methodology of Geochemical Blocks developed by Prof. Xie and his colleagues in recent years, for assessing gold resources in Shandong Province. In this paper, the authors have calculated and got 2.5 ng/g as the threshold of Au geochemical blocks in Shandong, and delineated 2 geochemical blocks and more than ten regional geochemical anomalies. The statistic characteristics of these two geochemical blocks and other 8 regional geochemical anomalies are listed in this paper; the total gold tonnage in these blocks and regional geochemical anomalies (given a 1 000m thickness of every rock mass) is 419 236 ton. Using a mineral coefficient 0.90% to calculate the potential of gold resources, it is revealed that there are still 1 249 ton (given 500m thickness of every rock mass ) or 2 522 ton (given 1 000m thickness of every rock mass) gold resources in about 15 631 km 2.

关 键 词：勘查地球化学 地球化学块体 资源潜力预测 金矿床 山东 成矿率 

分 类 号：P618.51[天文地球—矿床学]