川西北地区绵竹观音泉富锶矿泉水来源分析  

Source Analysis of Sr Mineral Water in Mianzhu Guanyin Spring in Northwest Sichuan Basin

作　　者：王一萱 王多义[1,2] 左银辉[1,2] 

机构地区：[1]成都理工大学能源学院,四川成都 [2]成都理工大学,“油气藏地质与开发工程”国家重点实验室,四川成都

出　　处：《自然科学》2019年第1期29-36,共8页Open Journal of Nature Science

摘　　要：川西北绵竹地区沉积了厚度大于1700 m的侏罗系莲花口组钙质砾岩,构造裂隙发育,是地下水运移和储集的有利场所,且地下水中锶含量很高,具有开发价值。然而对本区乃至整个西北地区地下水成因及富锶机理的研究十分薄弱。本文利用绵竹地区31个水样化学成分数据及对观音泉水质、水温、水量动态变化数据对地下水、围岩成分以及二者相互作用进行分析,研究地下水的成因以及锶的来源。样品锶含量范围在0.25~0.96 mg/L,观音泉水质动态变化在0%~12%之间,水温在17.9℃~18.5℃,枯水期允许开采量160 m3/d。由此可知地下水与围岩钙质砾岩的溶蚀、溶滤作用强烈,水质、水温稳定且水量丰富,受外界影响小,有利于锶矿泉水的形成和演化。此外,结合构造发展史综合分析得出钙质砾岩的锶组分与西北龙门山区海相碳酸盐岩有密切关系。The Jurassic Lianhuakou Formation calcareous conglomerate with a thickness of more than 1700 m is deposited in the Mianzhu area of northwestern Sichuan Basin, and the tectonic fracture is developed. It is a favorable place for groundwater migration and storage, and the groundwater contains high content of strontium (Sr) and has development value. However, the research on the causes of groundwater and the mechanism of Sr’s richness in this area and even the whole north-west region is very weak. In this paper, the chemical composition data of 31 water samples in Mi-anzhu area and the dynamic changes of water quality, temperature and volume of Guanyin Spring were used to analyze the groundwater, surrounding rock composition and their interactions, and to study the causes of groundwater and the source of Sr. The content of Sr in the sample ranged from 0.25 to 0.96 mg/L. The dynamic change of water quality was between 0% - 12%, the water temperature was 17.9?C - 18.5?C, and the allowable extraction volume was 160 m3/d in dry season. It can be seen that the dissolution and leaching function of groundwater and surrounding rock calcareous conglomerates are strong, the water quality and water temperature are stable and the water is abundant, and the external influence is small, which is conducive to the formation and evolution of the Sr mineral water. In addition, combined with the structural and development his-tory, the composition of the calcareous conglomerate is closely related to the marine carbonate rock in the Longmen Mountains in the northwest.

关 键 词：绵竹地区 地下水 锶 钙质砾岩 溶滤作用 海相碳酸盐岩 

分 类 号：P61[天文地球—矿床学]