Abstract:The gold deposit types in Daqinghe in right wing of Chahar in Inner Mongolia are metamorphic hydrothermal medium and low temperature deposits. It occur in Archean Ula Mountain Group, and the ore types are mainly gold-bearing sulphide quartz veins and alteration rock type gold ores. Based on geological characteristics and distribution of ore bodies in the study area, combining with the test analysis of relevant elements and geological characteristics of adjacent typical ore deposits, it is concluded that the source area of gold elements in the area is mainly Archean Ula Mountain Group, and followed by magmatic rocks. The deposit are formed in the end of Paleozoic to the middle and late Permian. The early diagenetic mineralization is formed in the original ore deposit or initial source layers, and the late Permian is affected by the middle and late Permian multi-stage subhydrothermal fluid, extracting, activating and migrating gold elements to form gold-bearing hydrothermal fluids, and filling and precipitating in favorable mineralization sites. The mineralization is strictly controlled by compressive torsional fractures with the trend of NE and NEE in Permian granodiorite. The ore bodies have the characteristics of hidden reproduction and goose column lateral ambush distribution.
