The Geological Characteristics And Prospecting Prediction Of Gold And Polymetallic Deposits In The Margin Of Zang Jia Zhuang Basin,Jiaodong,China

Zangjiazhuang basin is located in the middle of Jiaodong,sitting in Qipengfu metallogenic belt,which is one of down-fault basins in the north of Qixia anticlinaria,showing ??‘type.The vocano-magma activities in the basin are obviously controlled by reginal intersection faults,the margin of which produced gold and polymetallic deposits.Based on the projects of ?Study on deep crustal structure and metallogenic mechanism in the northwest Jiaodong Peninsula???Geological and mineral survey in Qixia–MuPing region of Jiaodong metallogenic belt? and ?The metallogenetic regularity and prediction of gold and polymetallic deposits in Qixia,Penglai and Fushan,Shandong Province?,gold and polymetallic deposits characteristics and metallogenic prediction in the margin of Zangjiazhuang basin were analyzed.The results showed that gold and polymetallic deposits were respectively produced in the north and south of the basin margin fault and the typical gold deposit is Xilin gold deposit,medium-low temperature hydrothermal alteration rock type.Typical pollymetallic deposit is Xiangkuang lead-zinc deposit,skarn-porphyry type.Vocanic activities have close relationship with the production of gold and polymetallic deposits.The zircon U-Pb dating of the mineralization parent rock granodiorite porphyry in the Xiang Kuang Pb-Zn deposit is 125.8 ± 0.12 Ma,The age of polymetallic mineralization corresponds to its metallogenic age,and gold deposits is slightly posterior to the polymetallic deposits.According to 21 faults deduced in gravitational field and magnetic field,among which 9 is NE-trending faults,4 is NW-trending faults,3is EW-trending faults,5 is SN-trending faults.EW-trending Xilin-Wuyangquan fault and Longwopu-Hanjiatong fault is obviously reflected in gravitational field and magnetic field.Based on 1 ? 50 000 stream sediment anomaly,7 advantage regin were delineated.According to comprehensive analysis of regional geological characteristics,gravitational field and magnetic field characteristics and geochemistry characteristics,combined with typical deposits characteristics of Xilin gold deposit and Xiangkuang lead-zinc deposite,2 I grade metallogenic prospective areas,1 ?grade metallogenic prospective area and 1 ? grade metallogenic prospective area were delineated.2 prospecting target areas were preliminarily determined,Dongshanzhuang Au prospecting target area and Xiangkuang deep Cu-Mo prospecting target area.