Daocaowan mining area is located about 20 kilometers northeast of Lengshuijiang City, which is under the jurisdiction of Lengshuijiang Mining Town, and is adjacent to the old tin mine in the south and west. The traffic in the work area is mainly through the highway. The Hunan-Guizhou Railway passes through the East and West Stations of Lengshuijiang City, and the waterway along the Zijiang River allows 20 tons of civilian boats to go north to Dongting Lake, with convenient transportation. The working area is 4.55 square kilometers. The overall trend of the mountains in the working area is northeast, which belongs to hilly landform with strong terrain cutting. This area has a continental mountainous climate. The water system in this area is not very developed, and there are roughly two streams and gullies.
The second corps of Hunan Nonferrous Geological Exploration Bureau conducted geological exploration. The mineral to be explored is antimony, and the work level is general survey. The exploration fund is 8.35 million yuan.
(2) Description of results
The exposed strata in the mining area are mainly Lower Carboniferous and Upper Devonian, and the ore-bearing rock series are mainly limestone members of Shetianqiao Formation. The mining area is located at the north inclined end of Xikuangshan compound anticline, where Xing Xing anticline and Daocaowan anticline are developed. F75 and its northeast branch fault F74 pass through the western periphery of the mining area, and there are northeast metallogenic faults F7 1, F72, F98 and F73 in the area. Antimony deposits in this area should belong to stratabound medium-low temperature hydrothermal deposits, and the ore bodies controlled by drilling are mainly integrated ore bodies, which are layered and stratoid. This work has controlled the deep ore body to extend to about 65,438+0,000m deep and 300m wide.
Main physical workload completed: drilling 8478.438+03m, and 96 basic analysis samples. The general survey found (3.33+3.34) 42,000 tons of antimony metal resources. Among them, the amount of (333) metallic antimony is 6.5438+0.3 million tons; The quantity of metallic antimony is 29,000 tons.
(3) the brief process of achievement
Team 234 of Hunan Metallurgical Exploration Company once listed this area as the prospect area of Xikuangshan antimony ore field, and did a little surface geological work near 1966. 198 1, and the prospecting work was carried out by drilling. 1∶5000 geological mapping covers an area of 8 square kilometers, with 553 cubic meters of exploratory trench, 524 spectral geochemical samples, 8 bottom samples, 3 measured profiles of 3,685 meters and 4 mercury gas profiles. In the drilling project, four holes (64/ZK2, 72/ZK 1, 72/ZK2 and 58/ZK2) were completed, with a total footage of 2,732 meters (4 holes). Field work was carried out in 2007-2008, and the geological profiles1:/10 10,17 m,1:5000 m, 2 square kilometers, exploratory trench,1. In 2009, the Second Corps of Hunan Nonferrous Geological Exploration Bureau was entrusted to design and construct ZK6A01(920 (920m)). On 20 10, the general survey of exploration rights was continued, mainly drilling, and then 9 drilling holes were completed. During the project, 8478m drilling footage was completed, 10 boreholes were investigated and 96 samples were collected.