Fracture Characteristics and Ore-Controlling Model of Laowan Gold Deposit, Tongbai County, Henan Province
摘要
Laowan gold ore zone is controlled by Laowan brittle-ductlie shear zone which is a part of Guishan-Meishan fault that uncovered at Tongbai area.Laowan brittle-ductlie shear zone is a kind of right-sliding-shear rupture system,which including Laowan-Songba fault and a type of secondary shear fracture.Laowan fault and Songba fault are right sliding rock and ore-controlling fault,which control magmatic hydrothermalism and hydrothermal minerogenetic system engender at this area.The secondary fault lie in some brittle faults that in two border fault,which are different because of geometric shapes,structure features and sliping styles.Shangshanghe-Pengjialaozhuang ore block is a R-tensile contorted fault that is a type of regional right sliding system.Most of Laowan-Shenglaozhuang ore block are P-compressible contorted fault,the others are Y-tensile contorted fault and T-tensile fracture,they are Riedel-shear system and made up a type of braided right sliping shear zone that contacted by P-shear zone and R-shear zone,which controls all lodes and mineralized bodies in Laowan gold deposit.So the ore-control model of fault structure in Laowan gold deposit is primary border fault control wall rocks and secondary right-sliping-shear fault zone control ores.
