| 地下水中微量组份H2SiO3富集的地质地球化学环境 |
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| 引用本文：刘庆宣,王贵玲,张发旺.2004.地下水中微量组份H2SiO3富集的地质地球化学环境[J].地球学报,25(5):575-578. |
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| 基金项目:国家科委"八五"重点科技攻关项目(编号:85-925-05-06)"区域地球化学与农业和健康" |
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| 中文摘要:通过对全国325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H2SiO3的富集特征与含水介质岩性的关系，以及富含H2SiO3地下水的地球化学特征。认为富含H2SiO3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H2SiO3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H2SiO3含量与水化学类型和pH值相关，推断出HCO3-Ca、HC03-CaNa型水和碱性、酸性水都有利于H2Si03的富集。 |
| 中文关键词:地下水 微量组份H2SiO3 地球化学环境 |
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| Geological-Geochemical Environment for the Enrichment of Trace Component H2SiO3 in Groundwater |
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| Abstract:Based on an analysis of chemical data of325 H2SiO3-rich groundwatersamples as well as their geochemical environments and geological settings, theauthors studied the relationship between the enrichment of H2SiO3 in groundwaterand the properties of the aquifer media and investigated geochemical characteristics of such groundwater. The results show that the formation of H2SiO3-enriched groundwater is closely related to such geochemical environmental factors as aquifer media and average SiO2 abundance. The most favorable geological environment for the enrichment of H2SiO3 in groundwater is intermediate-acid intrusive rocks, followed by regional metamorphic rocks, eruptive rocks and clastic rocks. It is also revealed that the H2SiO3 concentration in the groundwater is related to water types and pH values. HCO3-Ca type, HCO3-Ca·Na type, alkaline typeand acid groundwaters are favorable to the enrichment of H2SiO3. |
| keywords:groundwater trace component H2SiO3 geochemical environment |
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