摘要
通过对全国 32 5处富含偏硅酸地下水点的化学测试数据、所处的地球化学环境、地质背景的分析 ,阐述了微量组份H2 SiO3 的富集特征与含水介质岩性的关系 ,以及富含H2 SiO3 地下水的地球化学特征。认为富含H2 SiO3 地下水的形成与不同含水介质岩性和SiO2 平均丰度等地球化学环境密切相关。地下水中H2 SiO3 富集的最有利地质环境是中酸性侵入岩地层 ,其次是区域变质岩、喷出岩、碎屑岩。研究表明 ,地下水中的H2 SiO3 含量与水化学类型和 pH值相关 ,推断出HC0 3 Ca、HC0 3 Ca·Na型水和碱性、酸性水都有利于H2 SiO3 的富集。
Based on an analysis of chemical data of325 H 2SiO 3-rich groundwatersamples as well as their geochemical environments and geological settings, theauthors studied the relationship between the enrichment of H 2SiO 3 in groundwaterand the properties of the aquifer media and investigated geochemical characteristics of such groundwater. The results show that the formation of H 2SiO 3-enriched groundwater is closely related to such geochemical environmental factors as aquifer media and average SiO 2 abundance. The most favorable geological environment for the enrichment of H 2SiO 3 in groundwater is intermediate-acid intrusive rocks, followed by regional metamorphic rocks, eruptive rocks and clastic rocks. It is also revealed that the H 2SiO 3 concentration in the groundwater is related to water types and pH values. HCO 3-Ca type, HCO 3-Ca·Na type, alkaline typeand acid groundwaters are favorable to the enrichment of H 2SiO 3.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2004年第5期575-578,共4页
Acta Geoscientica Sinica
基金
国家科委"八五"重点科技攻关项目 (编号 :85 92 5 0 5 0 6)"区域地球化学与农业和健康"的部分成果。
关键词
地下水
微量组份
H2SiO3
地球化学
groundwater trace component H 2SiO 3 geochemical environment
