Study on the geological characteristics of the Dasiji silver-lead-zinc deposit in Tianzhou County,Zhejiang Province

Based on the analysis and research on the geological setting and the geologic features of mineral deposit in Dasiji silver-lead-zinc deposit,it is concluded that the type of this silver-lead-zinc deposit can be regarded as tectonically altered deposit formed by the activities of volcanic hydrothermal solutions,belonging to the late Yanshan metallogenetic epoch.The volcanic hydrothermal activities not only provided thermodynamic energy,but also carried a great deal of metallogenetic materials from the source of ore-bearing layers to the tectonically favorable positions.Especially in the NW-trending faults,to precipitate,concentrate and form deposit.The prospecting criteria and the metallogenic prognosis are also summed up in the paper.