1. Earth Sciences College, Guilin University of Technology, Guilin 541004, China 2. Key Laboratory of Geochemical Exploration ,Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences,Langfang 065000, China 3. UNESCO International Center on Global-Scale Geochemistry, Langfang 065000, China 4. Inner Mongolia Xingye Mining Co., Ltd., Chifeng 024000, China
With the electro-geochemical survey technology becoming more and more "portable", it is possible to conduct electro-geochemical survey of small or medium scales. In this paper, an effect comparison test of electro-geochemicalsurvey and soil survey at the scale of 1:50,000 was carried out within 40 km2 of the hydrothermal type lead-zinc polymetallic ore district in the aeolian sand shallow covered area of Luokedun, Inner Mongolia. The results are as follows: ①Electro-geochemical survey can delineate comprehensive anomalies of Pb-Zn-Ag-As-Bi-Cd, which have the same composition as the known orebodies. The locations of the anomalies are consistent with the known orebodies/ore spots in spatial distribution. ② Compared with the soil survey results, the results of anomaly range, contrast and continuity from the electro-geochemical survey are more superior in that soil soil survey can only find anomalies of spotted distribution in the outcropping area of the hill residual soil. ③The electro-geochemical survey also finds comprehensive anomalies of multiple elements in the aeolian sand shallow covered area in the northwest of the survey area. Based on these anomalies, the 1:10,000 induced-current middle-gradient survey and drilling verification test was carried out. A 6-meter-thick Ag-Cu rich orebody was discovered at the depth of about 540 meter, which seems to have been a breakthrough in ore prospecting. The above test results show that the electro-geochemical survey at the scale of 1:50,000 can effectively delineate the prospecting targets in the shallow covered area of aeolian sand. The electro-geochemical survey can be popularized and applied in future work.
Ren T X, Wu Z H, Wang M Q. New advances in the research on new methods and new techniques for geochemical exploration in the past ten years[J]. Geophysical and Geochemical Exploration, 1997,22(6):411-417.
Liu P F, Luo X R, Wen M L, et al. Retrospect and prospect for geo-electrochemical technology research in the past three decades of China[J]. Joumal of Guilin University of Technology, 2018,38(1):47-55.
Jiang Y J, Wei J H, Zhou J R, et al. The Application of new geochemical exploration methods to mineral exploration and its geological effect[J]. Geophysical and Geochemical Exploration, 2010,34(2):134-138.
Zhi C, Xiang W, Zeng J N, et al. The tentative application of the geoelectro-chemical extraction method to the deep prospecting:A case study of the Hucun copper-molybdenum deposit in Anhui Province[J]. Geophysical and Geochemical Exploration, 2015,39(1):149-155.
Ye X D, Sun B B, Zhou G H, et al. Effectiveness and conditions tests of geo-electrochemical electrochemical extraction in the Caijiaying Pb-Zn polvmetallic mining area,Hebei Province[J]. Geology and Prospecting, 2018,54(5):979-987.