论文部分内容阅读
金厂峪金矿床是冀东最大的金矿床 ,具有早期复脉型和晚期石英大脉型两种矿石类型。矿区产有多期钠长岩脉 ,且与含金矿脉有密切的时间和空间关系。青山口花岗岩体位于矿区西约 2～ 3km,有研究者认为金矿床成因上与花岗岩体有关。应用先进的 SHRIMP测年技术 ,测得肉红色钠长岩脉的锆石 w (2 0 7Pb) / w (2 0 6Pb)年龄为 (185 8± 8) Ma,青山口花岗岩体锆石 w(2 0 6Pb) / w(2 3 8U )年龄为 (199± 2 ) Ma。金厂峪金矿床的的复脉型矿化早于肉红色钠长岩脉 ,故其矿化的时代应在晚元古代。青山口岩体的年龄和区域上与辉钼矿化有关的花岗岩年龄一致 ,均为燕山早期。推测金厂峪金矿床晚期石英大脉型矿化中的辉钼矿化可能与青山口花岗岩体有关 ,石英大脉型金矿化时代为中生代燕山期
The Jinchangyu gold deposit is the largest gold deposit in eastern Hebei with two types of ore deposits: early complex veins and late quartz veins. The mining area has a number of briquette dikes and has close temporal and spatial relationships with gold-bearing veins. The Qingshankou granite body is located about 2 ~ 3km west of the mining area. Some researchers believe that the gold deposits are genetically related to granite bodies. Based on the SHRIMP dating technique, the zircon w (2 0 7Pb) / w (206Pb) age of the reddish-burial dikes was (185 8 ± 8) Ma, and the zircons of the Qingshankou granite 2 0 6Pb) / w (2 3 8U) Age (199 ± 2) Ma. The gold-bearing gold deposits in the Jinchangyu deposit were earlier in mineralization than the reddish-bryophyte veins, so the age of mineralization should be in the Late Proterozoic. The age and area of the Qingshankou pluton coincide with the age of granite associated with molybdenite mineralization, both of which were early Yanshanian. It is speculated that the molybdenite mineralization in late quartz vein-type mineralization of the Jinchangyu gold deposit may be related to the Qingshankou granite body. The epoch of the quartz vein-type gold mineralization is Mesozoic Yanshanian