论文部分内容阅读
采用SHRIMP测年方法测得柏杖子金矿区含矿花岗岩的锆石U-Pb年龄为(222±3)Ma,与区内都山花岗岩基和三家子金矿区花岗斑岩的年龄一致,属中生代印支期后碰撞花岗岩。该年龄限定了金矿化年龄的下限,即金矿化不可能早于印支期,但并不能确定金矿化的精确年龄。根据金矿脉与后期岩脉伴生的特征,矿化可能发生在中生代燕山期。
The zircon U-Pb ages of the ore-bearing granites in the Bazhangzi gold deposit are (222 ± 3) Ma measured by the SHRIMP dating method and are consistent with the age of the granite porphyries in the Dushan granite basement and the Sanjiazi gold ore area , Belonging to the Mesozoic Indosinian post-collision granite. This age limits the lower limit of the age of gold mineralization, that is, gold mineralization can not be earlier than Indosinian, but the exact age of gold mineralization can not be determined. According to the characteristics of the gold veins and the later dikes, mineralization may occur in the Mesozoic Yanshanian period.