As an important part of geothermal resources, hot dry rock(HDR) is regarded as a clean energy for future, with a great research value and development prospect. In the present stage, HDR study in China should not only be carried out across the country, but also be focused on some key spots for breakthrough. According to this principle, this paper takes Wudalianchi volcanic area as a key spot for pilot study. Through analysis of the collected materials including regional geological conditions, rock geochemistry, deep CO₂ gas, regional geophysical data, this paper discusses the existence possibility of HDR resources in Weishan volcanic area of Wudalianchi. The results show that Wudalianchi volcanoes are not deep volcanoes, which indicates the possibility of HDR existence with heat source from shallow residual magma. The ceiling of the quaternary volcanic magma capsule may possibly exist at a depth of 3.3~3.4 km or so. Deep source CO₂ gas, widely discovered in the Wudalianchi volcanic area, is proven to be derived from the exhaust function of mantle magma, which is a diagenetic and cooling process and resulted frommagmatic crystallizing differentiation. The fact that high concentrations of CO₂ are found around Well W8 indicates there may be cooling diagenetic magmatic capsule in the underground space between Weishan volcano and Wulianchi No.7 Farm.

Wudalianchi  /  Weishan volcano  /  quaternary volcano  /  geothermal  /  hot dry rock  /  magmatic capsule