摘要
通过对福建大田琴山矿区水文地质调查,并对研究区所取的8件水样水质分析结果研究发现,该地区的地下水类型主要以HCO3-Ca为主。通过Gibbs模型分析,其成因是岩石风化与大气降水共同作用的结果,是大气降水渗入岩层并经过溶滤作用形成现今的地下水特征类型。结合研究区的地质地貌特征,发现研究区水化学成分在垂直方向上存在明显的分带性,由地表到地下,随着深度增加,研究区水化学类型由HCO3-Ca向HCO3.SO4-Ca、SO4.HCO3-Ca过渡,在深部形成SO4-Ca型水,主要受研究区矿物岩石组合类型的控制,这为研究地下水水文地球化学分带性成因提供了很好的例子。
Through the hydrogeology survey and analysis on eight water samples quality at Qinshan areain Datian county of Fujian Province, the results show that the main chemical types of groundwater in the area are HCO3 - Ca. Through the Gibbs model analysis, its genesis is the result of rock weathering and precipitation joint action ,and is the present groundwater types formed by precipitation leaching . Com- bined with the geological and morphological characters, we found the obvious vertical hydrogeochemical zoning of groundwater is occured in the studied area, along with increased depth in the studied area, the water chemical type is also transited from HCO3 - Ca to HCO3·SO4 - Ca, SO4·HCO3 - Ca from sur- face to ground, and eventually formed the water chemical type SO4 - Ca in deep area, because it is main- ly controlled by mineral rock combination type in studied area, and it provides good example for hydro- geochemical zoning causes of groundwater.
出处
《勘察科学技术》
2013年第1期13-18,共6页
Site Investigation Science and Technology
