The distribution and environment problems of geothermal springs in development and utilization in Beijing–Tianjin–Tangshan – Qinhuangdao area, China

摘要

Beijing-Tianjin-Tangshan- Qinhuangdao area structurally lies in the fault-fold belt before Yanshan orogenic belt. The geothermal springs are divided into two types: the natural outcrop type and the hidden artificial type of heat reservoir, the former of which is controlled by piedmont faulted, extending EW; while the latter of which is controlled by regional structure and geothermal field. Geothermal spring water is low salinity and neutral even low alkaline water, whose chemical type is mainly SO_4·(HCO_3)~- Na and SO_4·Cl·(HCO_3)~- Na. As the water is rich in fluoride and multiple heavy metals, it pollutes drinking water, soil, crops in different degree during the development and utilization. H_2S and CO_2 in the geothermal water also does harm to the atmosphere more or less.