桂林岩溶地下水^(14)C年龄测定结果及分析  

RESULTS AND ANALYSIS TO THE^(14)C DATING OF KARST GROUNDWATER IN GUILIN

作　　者：刘金荣[1] 梁耀成 

机构地区：[1]国土资源部岩溶动力学开放研究实验室,广西桂林541004 [2]广西地质环境监测总站桂林站,广西桂林541004

出　　处：《中国岩溶》2003年第4期267-270,共4页Carsologica Sinica

摘　　要：通过对桂林市孤峰平原部分水文地质钻孔的泥盆系上统融县组灰岩(D3r)和石炭系下统大塘阶白云岩、灰岩(C1d)溶蚀裂隙含水层进行岩溶水14C年龄分析测试,结果表明在与地表水或浅层地下水无直接水力联系的条件下,该岩溶地下水年龄一般都在3330aB.P.以上,且有随着深度增加而增大的趋势。该岩溶地下水年龄之所以偏大,主要是因为受制于其所处的地质环境的制约,水循环交替比较缓慢。Through^(14)C dating to karst groundwater from corrosion fissure aquifers in limestone of the Rongxian Group in the early Devonian Period, dolomite and the limestone of the Datang Group in the later Carboniferous Period in Guilin isolated peak-plain, it is proved that the age of the groundwater is usually 3330a B.P. if there is no direct relation between surface water and shallow groundwater. But the age will be older along with the depth. The major reason for the groundwater getting older is the water cycle becoming slower that is influenced by the geologic environment.

关 键 词：岩溶 地下水 ^14C年龄测定 桂林 

分 类 号：P641.134[天文地球—地质矿产勘探] P533[天文地球—地质学]