摘要
根据同性素水文地质研究,对潞安煤矿供水勘探区中奥陶统岩溶水划分为4个水动力条件分区,对其所在辛安村泉域划分了3个岩溶水系统。论述了各区岩溶水的补、径、排特征,计算了岩溶水的年龄及流速、天然补给量等水文地质参数。
The isotope hydrogeological study of karst water has shown that there are three karst water systems in the water supply exploration district of the Lu'an coal mine aud the Xin'ancun spring basin where it is located, one of which is the Middle Or-dovician karst water system in the northern and southern parts of the cover area where water supply exploration is carried out for the Lu'an coal mine. The exploration district can be divided into four zones of hydrodynamic conditions based on δ18O, δD, T and δ34S data of karst water and its hydrochemical characteristics con-bined with the data from hydrogeologic investigations (mainly including karst ratio and specific water capacity per well). According to the isotope content distribution and features of the regimes as well as the precipitation 18O altitude effect analysis, the characteristics of karst water recharge, runoff and discharge for various zones are discussed. Among the four zones, zones Ⅰ.Ⅲ and Ⅳ are zones of piston flow. The isotopic ages and the rates of natural recharge of karst water of zones Ⅰ and Ⅳ have been calculated with the piston flow tritium age calculation model; they are 12 years and 4.55m3/s for zone 1 and 33 years and 0,387m3/s for zone IIIIIIVVVVV. The 14C age of karst water and the rate of natural recharge of zone Ⅲ have been calculated by using the Tamers correction model, which are over 5000 years and 0.001m3/s respectively. Zone Ⅱ is a transitional zone between zones Ⅰ and Ⅲ, where the water is mainly recent water recharged since 1952 and unevenly distributed.The Xin'ancun spring swarm is the discharge outlet of the full drainage-pattern spring basin. The average tritium age and reserves of karst water in the basin have been calculated by using the full mixing model; they are 84 years and 3.15 × 1010m3/s respectively. Among other things the Middle Ordovician karst water has an average age of 80 years and reserves of 2.57 ×1010m3/s, and the Middle and Upper Cambrian karst water has an average age of 111 years and reserves of 0.58 ×1010m3/s.
出处
《地质学报》
EI
CAS
CSCD
北大核心
1994年第1期71-86,共16页
Acta Geologica Sinica
关键词
同位素
岩溶水
天然补给量
年龄
isotope, karst water, main runoff zone, natural recharge, age
