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

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.