CAJ | 학술논문

通过对良乡地热田中地热地质条件、地热水化学资料及δD、δ18 O、3 H、14 C同位素的研究,阐述了良乡地热田地热水的起源、地热水的变质与演化、同位素水文特征。研究表明：良乡地热田中地热水化学类型以 HCO3· SO4-Ca·Na·Mg 型为主,同时地热水中含有氟、偏硅酸等多种有医疗价值的特殊组分；通过对地热水离子浓度分析,良乡地热田中地热水具有入渗溶滤水特征,为初期变质水。从水-岩平衡状态上看,地热田中地热水为未成熟水；依据主要离子浓度和同位素分析,良乡地热田中地热水为地热热源水和来自北京迭断陷西南方向现代循环水补给的混合型；依据放射性同位素3 H与14 C确定了良乡地热田中地热水年龄为38960±630 a；依据氢氧稳定同位素计算了地热水补给高程为620~730 m,推断补给区来源于北京市西南房山区相对高程较小的中-低山区。
통과대량향지열전중지열지질조건、지열수화학자료급δD、δ18 O、3 H、14 C동위소적연구,천술료량향지열전지열수적기원、지열수적변질여연화、동위소수문특정。연구표명：량향지열전중지열수화학류형이 HCO3· SO4-Ca·Na·Mg 형위주,동시지열수중함유불、편규산등다충유의료개치적특수조분；통과대지열수리자농도분석,량향지열전중지열수구유입삼용려수특정,위초기변질수。종수-암평형상태상간,지열전중지열수위미성숙수；의거주요리자농도화동위소분석,량향지열전중지열수위지열열원수화래자북경질단함서남방향현대순배수보급적혼합형；의거방사성동위소3 H여14 C학정료량향지열전중지열수년령위38960±630 a；의거경양은정동위소계산료지열수보급고정위620~730 m,추단보급구래원우북경시서남방산구상대고정교소적중-저산구。
According to the geothermal settings,hydrochemical data,and research on the isotopes ofδD,δ 1 8 O,3 H,1 4 C in geother-mal water in the Liangxiang geothermal field,the origin,metamorphism and evolution,and hydrological characteristics of iso-topes of geothermal water were investigated.The results suggested that (1)the hydrochemistry type of geothermal water in the Liangxiang geothermal field is mainly HCO3 ·SO4-Ca·Na·Mg,and the geothermal water contains mineral components with medical benefits,especially chlorine and metasilicic acid;(2)according to the analysis of ion concentrations,the geothermal wa-ter is lixiviated and belongs to initially metamorphic water;(3)the geothermal water is immature based on the water-rock bal-ance status;(4)the geothermal water is mainly formed by the mixing of geothermal heat source water and modern circulating water supply from the southwest of Beijing multiphase fault-subsidence;(5)the age of geothermal water is about 38 960±630 years based on the isotope analysis of 3 H and 1 4 C;and (6)the recharge elevation of the geothermal water is about 620 to 730 m according to the stable isotope calculations of oxygen and hydrogen,and the recharge source is the mountain area with relatively lower elevations in the southwest of Beijing.