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Geophysical characteristics and prospecting effect deep in Shanhou Gold District,south part of Zhaoping Fault,Jiaodong Peninsula

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  • Geophysical Prospecting Co.,Ltd.,Inner Mongolia Non-ferrous Geological Mining Industry(Group)&College of Earth Sciences,Institute of Disaster Prevention|College of Earth Sciences,Institute of Disaster Prevention&Hebei Key Laboratory of Earthquake Dynamics|College of Earth Sciences,Jilin University|College of Earth Sciences,Institute of Disaster Prevention&Hebei Key Laboratory of Earthquake Dynamics
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Abstract:

Jiaodong Peninsula is an important base of gold reserves for China and even the whole world.The gold deposits within are mainly controlled by 3 super large-scale faults namely Sanshandao,Jiaojia and Zhaoping.Among them,Zhaoping Fault is covered severely by Quaternary system,making it difficult to predict the spatial distribution of deep factures,rock mass and ore bodies by surface geological work.High-precision gravity measurement and CSAMT are used to carry out geophysical research on Shanhou Gold District,south part of Zhaoping Fault.The high-precision gravity measurement results show that the anomaly curve on the whole rises rapidly;the rock density parameter results show that the density of rock is 2.77 g/cm3,the density of Palaeoproterozoic rock is 2.82 g/cm3,the density of quartz vein and altered rock is 2.92 g/cm3,all above the density of Yanshanian Linglong monzonitic granite(2.57 g/cm3);CSAMT resistivity profile shows that on the contact zone of Linglong monzonitic granite and palaeoproterozoic strata exists stripped low resistance body which inclines eastward and takes the form of stretched wave.Above the low resis-tance body,there is a high resistance lump.Therefore,it is inferred that the low resistance body is caused by the southward stretch of Zhaoping Fault.Verified by drilling,at elevation of -432--423 m discovered ore(mineralized) body.So it is concluded that deep in the district,there are good prospecting potentials.

Keywords:

Zhaoping Fault;geophysics;prospecting direction;Shanhou Gold District;Jiaodong Peninsula