辽宁杨家堡金矿矿床成因和找矿标志分析

Analysis of Genesis and Prospecting Criteria of Yangjiapu Gold Deposit in Liaoning

基于对矿区、矿体和矿石特征的分析,探讨了杨家堡金矿矿床成因和找矿标志。分析认为:区内NE向断裂是最重要的控矿和容矿构造,围岩以碎裂似斑状黑云母二长花岗岩、碎裂大理岩和碎裂绢云板岩等为主。震旦系和寒武—奥陶系接触交代部位、甬子峪斑状黑云母二长花岗岩与地层接触部位、构造碎裂岩带和围岩蚀变发育地段是重要的找矿部位。矿床属中—低温构造岩浆热液蚀变岩型金矿床。

Based on the analysis of mining area,ore body and ore characteristics,the genesis and prospecting criteria of Yangjiapu gold deposit are discussed.The analysis shows that the NE-trending faults in the area are the most important ore-controlling and ore-hosting structures,and the surrounding rocks are mainly cataclastic porphyritic biotite monzonitic granite,cataclastic marble and cataclastic sericite slate.The contact metasomatic parts of Sinian and Cambrian-Ordovician,the contact parts of Yongziyu porphyritic biotite monzonitic granite and strata,tectonic cataclastic rock belt and wall rock alteration development area are important prospecting criteria.The gold deposit is a medium-low temperature tectonic magmatic hydrothermal altered rock type gold deposit.