The high-precision magnetic anomaly characteristics and prospecting forecast in Xunhua region of Qinghai
Mei-Ding WANG1, Jian-Qing MA2()
1. Geophysical and Geochemical Exploration Corporation, Bureau of Geological Exploration for Nonferrous Metals in Northwest China, Xi'an 710068,China 2. School of Geological Engineering and Surveying, Chang'an University, Xi'an 710054,China
Xunhua region of Qinghai is located in the joints of the Qilian orogenic belt and the west Qinling orogenic belt. In order to reveal the structural feature, and determine the key metallogenic prospect areas, the 150 000 high precision magnetic survey was carried out in the selected area. The azimuth of survey lines is north east to 30°, 391 pieces rock (mineral) magnetic specimens were cellected. through the analysis of the magnetic parameters, characteristics analysis and interpretation of magnetic anomaly, the ZongWuLong-tianshui thrust fault F1 towards NW50°. The key metallogenic prospect areas are mainly distributed in the northeast of the surveyed area, by caledonian period intrusive mass of JiShiShan ultrabasic diorite and LeiJiShan basite granite, and have high mineral content. This work shows that the high-precision magnetic survey is one of the important basic methods in regional geological survey and mineral survey, provides geophysical basis for the next step of mineral survey in the investigated area.
王美丁, 马见青. 青海循化地区高精度磁异常特征及找矿预测[J]. 物探与化探, 2018, 42(3): 491-498.
Mei-Ding WANG, Jian-Qing MA. The high-precision magnetic anomaly characteristics and prospecting forecast in Xunhua region of Qinghai. Geophysical and Geochemical Exploration, 2018, 42(3): 491-498.