| 湖南宏厦桥花岗岩的水文地球化学特征和成因过程 |
| |
| 引用本文： | 罗照华,曾小芽.湖南宏厦桥花岗岩的水文地球化学特征和成因过程[J].华南地质与矿产,2007,32(4):1-8. |
| |
| 作者姓名： | 罗照华 曾小芽 |
| |
| 作者单位： | 湖南省地质工程勘察院,湖南,株洲,412003 |
| |
| 摘 要： | 以湖南宏厦桥花岗岩体作为研究区,对地下水化学分析资料进行了研究,发现区内地下水系超淡、极软的、弱-中性的重碳酸型水,其化学组成以Ca2 、Mg2 、K 、Na 、HCO3-为主。与株洲地区的地下水相比,可溶性S iO2、K 、Na 和游离CO2明显偏高,而且,在水中M g2 、K 、Na 、HCO3-所占比重更大,m eq%平均比值分别是株洲地区地下水的2.23、1.27、1.16倍,表现出典型的花岗岩地区地下水相应的化学组成。研究还发现,区内地下水化学的分布具有较强的水平分带性。研究认为:区内地下水化学的形成和迁移受岩性、大气降水及影响水交替强度的地形、地貌、地表水系、断裂构造的控制,同时受其他气候要素及植被、人类活动等生物作用的影响;区内地下水化学成分的形成以硅酸盐矿物的分解和水解等化学风化作用为主,风化过程中CO2的积极参与起作关键性的促进作用。同时水中CO2的减少和阴离子以HCO3-离子占绝对优势地位,进一步说明花岗岩的化学风化过程是一个净碳汇的过程。
|
| 关 键 词： | 花岗岩 岩石风化 水文地球化学特征 成因过程 宏厦桥 湖南省 |
| 文章编号： | 1007-3701（2007）04-0001-08 |
| 收稿时间： | 2007-06-02 |
| 修稿时间： | 2007年6月2日 |
The Hydrogeochemical Characteristics and Origin Process of Granite in Hongxiaqiao,Hunan Province |
| |
| LUO Zhao-hua,ZENG Xiao-ya.The Hydrogeochemical Characteristics and Origin Process of Granite in Hongxiaqiao,Hunan Province[J].Geology and Mineral Resources of South China,2007,32(4):1-8. |
| |
| Authors: | LUO Zhao-hua ZENG Xiao-ya |
| |
| Abstract: | Regard Hongxiaqiao granite in Hunan as the studying area,carry on research to the groundwater chemical analysis materials,it discover that the groundwater are ultra and light,extremely soft in the district. Weak-neutral heavy carbonic acid type water,its chemistry makes up with Ca ,Mg ,K Na ,HCO3-as the main fact.Compared with groundwater of Zhuzhou area,soluble SiO2,K Na and free CO2 obviously on the high side,moreover Ca ,Mg among water,HCO3-proportion heavy,meq% average 2.23,1.27,1.16 time of groundwater in of Zhuzhou area respectively.The typical corresponding chemical composition of groundwater in study granite region demonstrate that the distribution of chemistry of groundwater has stronger horizontal zonation in the district The research has suggested that the forming and migration of chemistry of groundwater are control of the intensity of topography,ground form,river system of the earth's surface,fracture structure and other under the influence of biological function,climate key elements and vegetation,human activity at the same time.The forming of groundwater chemical composition relies mainly on the fact that chemistry such as resolving and hydrolysis of the silicate mineral weathering in the district.Weathering process of the positive participation of CO2 play a key reduction and the anion of CO2 have comparative advantage with HCO3-ion in water at the same time.It further proved that is a net carbon gathers together with the chemistry of the granite weathering process. |
| |
| Keywords: | Granite Rock efflorescence hydrogeochemical characteristics origin process Hongxiaqiao Hunan Province |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
