Structural controlling characteristics of the Zhoujia Fe-Co ore deposit and regional geological significance in Dashiqiao,Liaodong Peninsula
Structure often serves as a crucial pathway for ore-forming fluids,playing a pivotal role in controlling the formation and enrichment of ore deposits.Investigation structural evolution can provide a theoretical foundation for geological prospecting.This study detailly examines the Zhoujia Fe-Co deposits in Dashiqiao City,Liaoning Province,Northeast China through profiling,structural analysis,and petrographic observation.Field observations and laboratory petrographic studies indicate that Fe-Co ore bodies primarily occur within the leucoleptite and leptynite of the second segment of the Li'eryu Formation.A small amount of iron ore is also found in the Paleoproterozoic Liaoji granite.The structural analysis reveals that the deformation of surrounding rocks at Zhoujia Fe-Co mine includes early tight folding,thrust faulting,fault-related folding,as well as late pudding structures and plunging vertical folds.Based on field dike-cutting relationships and previous geochronology data synthesis,the Zhoujia Fe-Co deposit formation can be divided into three stages.In the early stage,initial formation deformation occurred,resulting in the development of S0 deformation into S1 and F,stages.During the middle stage,thrust faults and tight folds,which were generated during a period of intense orogeny,provided crucial structural conditions for the enrichment and mineralization of the Zhoujia Fe-Co deposit in the Paleoproterozoic.The final structural pattern observed at the Zhoujia Fe-Co deposit,including vertical folds and boudinage iron ores,was formed during exhumation and denudation processes associated with late Paleoproterozoic orogeny.
Zhoujia Fe-Co ore depositStructure and mineralizationPlunging vertical foldPaleoproterozoic Orogenesis
万方数据
维普
