GEOCHEMISTRY OF PRE-MESOZOIC GOLDBEARING FORMATIONS IN SHAOXINGLONGQUAN UPLIFT REGION, ZHEJIANG PROVINCE

The geochemistry of the main country rocks of gold deposits in Shaoxing-Longquan uplift region has been systematically studied in this paper. The authors believe that the Proternzoic Shuangxiwu group is the primary gold-bearing formation in this region and the Sinian-Cambrian Chencai group and the Precambrian Zuoxi migmatized quartz-diorite are the derivative gold-bearing formations. The genesis of rocks, content distribution features of gold and silver, characteristics of associated trace elements and other geochemical features in these formations clearly show a relationship of inheritance with evolution. By means of metamorphic-solution and volcanic-solution or/and other geological actions, these gold-bearing formations supplied the necessary ore-forming materials for the gold deposits in this region.     

浙江绍兴-龙泉隆起带前中生界含金建造的地球化学

本文对浙江绍兴-龙泉隆起带中主要金矿床的围岩进行了系统的地球化学研究,确定了该区存在有前中生界的原始含金建造——元古界双溪坞群以及衍生含金建造——震旦-寒武系陈蔡群和前寒武系左溪混合岩。它们在岩石成因、金银含量及分布、微量元素组合及特征等方面,均具有一定的继承和演化关系。通过变质-热液、火山-热液等地质作用,含金建造为隆起带中各类金矿床的形成提供了必要的成矿物质。