晋陕蒙接壤地区岩溶地下水与黄河水环境同位素特征分析  

STUDY ON ENVIRONMENTAL ISOTOPIC FEATURES OF THE KARST WATER AND THE YELLOW RIVER WATER AROUND THE JUNCTURE OF SHANXI, SHAANXI PROVINCES AND INNER MONGOLIA AUTONOMOUS REGION

作　　者：韩颖[1] 

机构地区：[1]山西省地质调查院太原分院

出　　处：《中国岩溶》2002年第4期283-289,共7页Carsologica Sinica

摘　　要：本文通过晋陕蒙接壤地区岩溶地下水与黄河水环境同位素特征的分析、研究,得出由补给区→迳流区→排泄区,岩溶水氚值由高变低,14C年龄具有由低逐渐升高的变化规律;利用同位素的高程效应,计算得到岩溶水补给区的补给高程为1500～1600m;利用氚值的衰变估算,岩溶地下水的运移速度为3.8～2.1km/a,反映出岩溶水由补给→排泄区由快到慢的运动过程。文中还利用黄河水与岩溶水的氚值,估算了黄河西岸岩溶水中有25%来自黄河水入渗,75%来自东部岩溶水的补给。According to analysis and study on the environmental isotopes of the karst water and the Yellow River water around the juncture of Shanxi, Shaanxi provinces and Inner Mongolia Autonomous Region, it is concluded that the tritium content changes from high to low and14C changes higher gradually when groundwater flows from the recharge area via runoff area to discharge area. It is calculated out by means of the altitude effectiveness of isotope, that the height of the karst water recharge area is about 1500 to 1600m. It is estimated by tritium decay that the velocity of karst water runoff is about 3.8 to 2.1km/a. So, it proves that the velocity of karst water runoff gets faster and faster from recharge area to discharge area. Finally, in this paper, it is estimated by using the tritium contents in the karst water and the river water that there is 25% river water seeps to the karst water on the west bank of Yellow Rivere, and other 75% water comes from karst water. 

关 键 词：地下水 环境同位素 岩溶水 黄河水 氚值 山西 陕西 赋存条件 运移规律 

分 类 号：P641.134[天文地球—地质矿产勘探] P64[天文地球—地质学]