The test of high-density induced polarization technique in the detection of shallow concealed lead-zinc deposits
Zhang Wei1, Zhang Zhen2, Li Hua1, Yu Yuanshan1, Jiao Yanjie1
1. Chengdu Center of China Geological Survey, Chengdu 610082, China;
2. No. 2 Geological Party, Guizhou Bureau of Geological Survey for Nonferrous Metal and Nuclear Industry, Liupanshan 553004, China
The application of Chinese-made WGMD-9 super-high-density electrical system to the Yangtianwo lead-zinc ore district in Shuicheng of Guizhou Province shows that this technique can more accurately distinguish the electrical structure characteristics of the Upper Permian Liangshan Formation and the Upper Carboniferous Maping Formation which are closely related to mineralization, and can also more accurately detect the orebody buried in the contact area between the sandstone and shale of Liangshan Formation and the limestone of the Maping Formation in the depth of 0~150 m, thus guiding the implementation of surface prospecting tunnels and finally achieving the prospecting aim through "indirect" means. The results obtained also show that the high-density induced polarization technique has two deficiencies, i.e., the restriction of supply current and the limited depth of detection.
