A Study of Water-Rock Equilibrium of Low Temperature Geothermal Reservoirs in China

Abstract

The vast main land of China is far from the Pacific Rim Geothermal Zone and the Mediterranean-Himalayan Geothermal Zone. Most of hot springs and geothermal wells in China located within inner Euro-Asian Plate. They are low temperature geothermal resources mostly. But there are different geological settings and various types of origin for them. However such low temperature geothermal resources in developed Eastern China is significant, especially in Beijing, Tianjin and the North China areas. Local geothermal resources have been utilized in space heating, medical treatment, industrial processing, agricultural greenhouse, amusement center and holiday resort. Present development has gained obvious economic and social benefit. Fitting in with the need of the development from many of these geothermal fields the research and forecast of potential geothermal resources have been undertaken in various aspects. Geochemical research is one of these components (Zheng et al., 1997). Nine geothermal water samples were collected from five geological units (Table 1 and Fig.1). As a comparison, collected a typical cold spring sample.