Intergrated Geophysical Constraint to the NW-trending Fault Zone in the Xiling Gold Deposit,Sanshandao,Shandong Province
Received date: 2017-08-20
Revised date: 2018-03-29
Online published: 2019-03-19
The Xiling gold deposit of Sanshandao is located in the coast of Bohai sea.It connected with the north sea area gold deposit and they explore a huge gold deposit of nearly 1 000 t of gold resources.The deposit need to be mined underground and undersea.The faults in the region are well developed and distributed in NE and NW directions.The NE-trending faults are ore-controlling structures.The NW-trending faults in the region have different degrees of water conductivity,it has a great impact on the safe mining of the deposit,so it is very important to ascertain the spatial distribution of the NW trending faults.In view of geological conditions and geophysical characteristics of the area,the exploration test in the east of mining area by using high precision magnetic method and audio magnetotelluric (AMT) method to conducted.According to the magnetic anomalies and electrical anomalies,the NW-trending faults F-1,F-2 and NE-trending faults F-3 and F-4 were interpreted in plane,four faults were interpreted in L1 section and three faults were interpreted in L2 section.Comprehensive judgment interpretation information shows that the NW-trending F-1 fault responds well both in plane and profile.Comparing with the NW trending structure research data in the north sea area,the results show that F-1 fault of Xiling gold deposit was agree well with B-F4 fault of north sea features.It is inferred that the NW-trending F-2 fault in Xiling mining area is broken by the F-3 fault.The study shows that the comprehensive geophysical prospecting method in the area is feasible and effective.It provide a geophysical evidence for verifying the existence of the new fault structure and judging the water-rich and water-conducting properties of the fault for the next drilling,also provided the basis for future development and utilization of mineral deposits.
Shipeng LIU , Shuya WANG , Xinxin FENG , Chuanyin YIN . Intergrated Geophysical Constraint to the NW-trending Fault Zone in the Xiling Gold Deposit,Sanshandao,Shandong Province[J]. Gold Science and Technology, 2019 , 27(1) : 25 -32 . DOI: 10.11872/j.issn.1005-2518.2019.01.025
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