Gold geochemical characteristics and the prospecting potential forecast of Zhajiatongna gold orefield of Qumalai

Zhajiatongna gold deposit was found during the 1∶ 50 000 ore survey by Qinghai Geological Survey Institute in 2005.It was located at east side of Dachang superlarge gold deposit.Based on exploration work in recent years,the amount of gold resources is over 20 tons.The discovery of the deposit was derived from the 1∶ 50 000 gold geochemical anomalies instructions.According to gold abundance background,1∶ 200 000,1∶ 50 000 stream sediment survey and 1∶ 1 million soil measurements,it was shown that gold geochemical abnormal characteristics were significant,with pretty well anomalies reproduction,which could be the direct guid gold prospecting,and the resource potential forecast can be up to large.