六盘山东麓地区岩溶类型及水化学特征研究  

Study on Karst types and hydrochemical characteristics of the six Shandong mountains

作　　者：周斌 

机构地区：[1]甘肃省地质环境监测院,甘肃兰州730050

出　　处：《地下水》2017年第6期27-29,共3页Ground water

基　　金：中国地质调查局地质调查项目"鄂尔多斯盆地甘肃能源基地地下水勘查"(1212010535205)

摘　　要：六盘山东麓地区岩溶具有北方岩溶的基本特征,碳酸盐岩的分布主要受构造作用、岩性条件及水动力条件的控制。根据埋藏条件、分为裸露型、覆盖型和埋藏型三种岩溶类型。通过在研究区内采集29组样本,对勘查区岩溶类型及水化学特征和该区域水化学成因进行探讨,结果显示,勘查区内地下水化学特征主要由含水层岩性及地下水埋藏条件决定。裸露型及覆盖型岩溶水(碳酸盐岩)和黄土潜水化学特征基本一致,为HCO3-Ca或HCO3-Ca·Mg型水;埋藏型岩溶水水化学类型趋于复杂化,主要表现在TDS达0.4~1.0 g/L,阳离子中三大离子含量平均化,阴离子中SO42-的含量明显升高,最高比例可达阴离子总量的40﹪;与裸露型及覆盖型岩溶水相比,Cl-含量占阴离子总量的比例仍然不大,最高不足20﹪,但绝对值增大,最高可达70.3 mg/L。研究结果为在该区寻找岩溶地下水提供参考。The karst in the six Shandong mountain area has the basic characteristics of the northern karst,and the distribution of carbonate rocks is mainly controlled by tectonism,lithologic conditions and hydrodynamic conditions. According to the burial conditions,it can be divided into three types： bare type,covered type and buried type. By collecting 29 samples in the study area,to explore,to Karst Exploration Types and characteristics of water chemistry and the regional water chemical characteristics showed that the exploration of groundwater chemical characteristics mainly from aquifer lithology and groundwater conditions. The chemical characteristics of bare and covered karst water（ carbonate rock） and loess phreatic water are basically the same,and they are HCO3-Ca or HCO3-Ca·Mg water; Buried karst water chemical type is complex,mainly in the TDS of 0. 4 ~ 1. 0 g/L,in three the average content of cationic ion,anion content in SO42-increased significantly,the highest proportion of total anion output; Compared with the bare and covered karst water,Cl-in the proportion of total anion is still insufficient,the highest 20 %,but the increase of the absolute value of the highest,up to 70. 3 mg/L. The results provide reference for finding karst groundwater in this area.

关 键 词：岩溶 类型 水化学 特征 

分 类 号：P641.134[天文地球—地质矿产勘探]