燕辽地区燕山期岩浆作用及热液型铀矿研究新进展

New Research Progress of Yanshanian Magmatism and Hydrothermal-type Uranium Mineralization in Yanliao Region

燕辽地区燕山期岩浆活动强烈,在时间上,从早到晚可划分出早侏罗世-中侏罗世早期、中侏罗世晚期-晚侏罗世早期、早白垩世早期、早白垩世晚期、晚白垩世5个期次,火山岩主体由早白垩世早期构成,侵入岩主体由中侏罗世晚期-晚侏罗世早期和早白垩世早期构成。燕辽地区主要以流纹岩-粗面岩组合为特征,为燕辽地区的岩浆岩分布及火山岩与铀成矿之间的关系研究奠定了良好的基础,也为火山活动有关的热液型铀矿的寻找提供了方向。

The Yanshanian magmatic activity in Yan Liao Area seems to be strong, From the viewpoint of chronology, the volcanism of all these volcanic belts can be subdivided into five stages： the Early Jurassic to early Middle Jurassic, late Middle Jurassic to early Late Jurassic, early stage of Early Cretaceous, late stage of Early Cretaceous and early stage of Late Cretaceous. The peak of magmatism in Eastern China is the early stage of Early Cretaceous volcanism, and the intrusive rocks are late Middle Jurassic to early Late Jurassic and early stage of Early Cretaceous. The area is mainly charactered by rhyolite-trachyte rock assemblage, it has good basis of the distribution of magmatic rocks in Yan Liao Area and mineralization connect with the volcanic, supply a direction of the hydrothermal-type uranium deposits related to volcanic activities.