山西定襄七岩泉水化学特征分析

Geochemical characteristics of Qiyan spring in Dingxiang,Shanxi Province

定襄泉地质构造处于系舟山逆断层,属奥陶系灰岩溶洞水,泉水主要受降雨补给。本文采集了定襄七岩泉测点及周围4个取样点的水样,通过水质、水岩反应、氢氧同位素、采样点水氡和微量元素等水化学特征分析,认为定襄4#来源于直接降水,其余4个取样点均为同一水源,1#、2#(测点)和3#水源为径流岩石且逐渐积累后形成的地下水,5#水源径流岩石的时间短,为地表水。泉的补给来源主要是大气降水,水—岩反应尚未达到离子平衡状态,反应程度较低,循环深度不大。

The Dingxiang spring geological structure is in the Jizhou mountain reverse fault,which belongs to the Ordovician limestone cave water.The spring water is mainly recharged by rainfall.In this paper,water samples were collected from Dingxiang Qiyan spring measuring point and four sampling points around.Through analysis of water chemical characteristics such as water quality,water-rock reaction,hydrogen and oxygen isotopes,water radon at the sampling point and trace elements,it is found that the number 4 is derived from direct precipitation,and the remaining 4 sampling points are all from the same water source.The water sources of number 1 and number 2 which is the measuring point as well as number 3 are runoff rocks and gradually accumulate groundwater.The number 5 is from surface water with short time of runoff rock.The source of spring supply is mainly atmospheric precipitation.The water-rock reaction has not yet reached the ion equilibrium state,the degree of reaction is low,and the circulation depth is not large.