Geological features and prospecting significance in Dongwan-Manyu gold deposit,Song County,Henan province

Based on the analysis and research on the geological setting and the geologic characteristic of mineral deposit in Dongwan gold deposit,it is concluded that the type of this gold deposit can be regarded as tectonically altered deposit formed by the activities of magmatic hydrothermal solutions,belonging to the Late Yenshan metallogenetic epoch.The magma 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 favourable positions,especially in the NNE-trending faults,to precipitate,concentrate and form deposit.The prospecting criteria and the metallogenic prognosis are also summed up in the paper.