Geochemical characteristics of stream sediments and ore-prospecting in Qiaomuwan area,Anhui Province

The Qiaomuwan area is located in southern Qingyang-Nanling depression basin. At present, more than ten metal deposits (occurrences) have been discovered in this area and surroundings with good prospecting potentials of gold, tungsten, copper, antimony and silver deposits. Based on the 1:50 000 stream sediment survey in Qiaomuwan area, this paper described geochemical characteristics of 12 elementssuch as Au,Ag, Cu, Pb, Zn, etc. in the Tianwu-Cheshan study area. According to the element geochemical parameters and element assemblage, there are favorable potentials for the concentration and mineralization of Au, Ag, Sb and Hg which are main ore-forming elements in the study area. With single element anomaly map of Au as its priority, combined with elements assemblages, abnormal characteristics and the ore-forming geological settings, the authors delineated 6 geochemical comprehensive anomalies and 4 metallogenic prospective areas, including Cheshan, Tianwu, Jinshan and Liyang prospects, and introduced geological metallogenic settings of the prospective area, which can provide important evidences for further prospecting work.