摘要
通过对崖城地热田的水化学、同位素、地温场特征进行分析:崖城地热田属于中低温地热田,水化学类型为SO_4·HCO_3-Na型,呈碱性,含较高氟和硅;地下热水为陆相沉积水,补给源为大气降水,补给高程591.3~683.3m,补给区为万担岭和大公岭一带;地下水年龄4269~11868年之间,热储平均温度118.59℃,循环深度达3.1km;该地热田受东西向九所—陵水深大断裂、F1、F2、F3断裂共同控制,在F2裂隙带钻孔地温曲线表现为对流型,F1断裂东侧的非裂隙带上钻孔地温曲线表现为传导为主的直线型。
By the analysis on the hydrochemistry,isotope and geothermal field characteristics for Yacheng geothermal field,it is found that Yacheng geothermal field belongs to a low temperature geothermal system,and the hydrochemical type belongs to SO_4·HCO_3-Na,which is with alkaline and contains relatively high fluoride and silicon. The hot groundwater is from continental sedimentary water which originates from atmospheric precipitation. The recharge elevation is in the range of 591. 3 ~ 683. 3m,and the recharge areas are from the mountain areas from Wandan to Dagong. The groundwater age is in the range of 4269 ~11868 years. The equilibrium temperature of the geothermal reserve is about 118. 59℃, and the circulation depth reaches 3. 1km. Yacheng geothermal field is controlled by the regional F1,F2,F3 and the EW faults. In F2 fissure zone,the drilling ground temperature curve performs to the air convection type,but the drilling ground temperature curve turns into the linear convection that shows the conduction is the main type in the zone without fissures which locates in the east of F1 fault.
出处
《工程勘察》
2017年第10期38-45,共8页
Geotechnical Investigation & Surveying
关键词
崖城地热田
地球化学
同位素
地温场
Yacheng geothermal field
geochemistry
isotope
geothermal field
