Effect of CO2 and H2SO4 on the dissolution of a carbonate basement and alteration of silicates in a volcano-sedimentary system in central Mexico

IF 4.9 Q2 ENGINEERING, ENVIRONMENTAL
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Abstract

This study explores the hydrogeochemical and isotopic characteristics of groundwater in the Irapuato Valley and Celaya Valley Aquifers in central Mexico, specifically focusing on the role of CO2 in mineral alteration during water-rock interaction. The study is grounded in the principles of hydrogeochemistry and stable isotope geochemistry, analyzing the impact of CO2 and H2SO4 on the weathering of carbonates and silicates. Hydrogeochemical analysis, including Piper diagrams, and isotopic measurements (δ13C, δ18O, δ2H), were conducted on water samples from wells in four municipalities (Irapuato, Salamanca, Villagrán, and Juventino Rosas). The data was statistically evaluated using Shapiro-Wilk tests to assess normality, skewness, and kurtosis, ensuring the reliability of the findings. The results indicate that HCO3 dominates the groundwater composition, with CO2 and H2SO4 significantly influencing mineral alteration processes. The isotopic data suggest that CO2 is primarily released from carbonate rock degassing, with slight isotopic enrichment in δ13C due to water-carbonate interaction. Hydrothermal fluids contribute to the geochemical evolution of the aquifer, leading to the formation of minerals such as tridymite, alunite, and kaolinite. Additionally, some groundwater samples exhibit evidence of thermalism and water-rock interactions, influencing their isotopic signatures and temperatures. These findings underscore the importance of CO2 in groundwater chemistry and highlight the need for further studies to understand regional flow dynamics and the potential impact of geothermal systems on water quality.

Abstract Image

二氧化碳和硫酸氢盐对墨西哥中部火山沉积体系中碳酸盐基底溶解和硅酸盐蚀变的影响
本研究探讨了墨西哥中部伊拉普阿托山谷和塞拉亚山谷含水层地下水的水文地质化学和同位素特征,特别侧重于二氧化碳在水岩相互作用过程中对矿物蚀变的作用。研究以水文地球化学和稳定同位素地球化学原理为基础,分析二氧化碳和 H2SO4 对碳酸盐和硅酸盐风化的影响。对四个城市(伊拉普阿图、萨拉曼卡、比利亚格兰和尤文蒂诺-罗萨斯)的水井水样进行了水文地球化学分析,包括皮珀图和同位素测量(δ13C、δ18O、δ2H)。采用 Shapiro-Wilk 检验对数据进行了统计评估,以评估正态性、偏斜度和峰度,确保研究结果的可靠性。结果表明,HCO3- 在地下水成分中占主导地位,而 CO2 和 H2SO4 对矿物蚀变过程有重大影响。同位素数据表明,CO2 主要是碳酸盐岩脱气释放的,δ13C 的同位素富集是由于水与碳酸盐的相互作用。热液促进了含水层的地球化学演化,形成了闪长岩、褐铁矿和高岭石等矿物。此外,一些地下水样本显示出热作用和水岩相互作用的证据,影响了其同位素特征和温度。这些发现强调了二氧化碳在地下水化学中的重要性,并突出了进一步研究的必要性,以了解区域水流动力学以及地热系统对水质的潜在影响。
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来源期刊
Groundwater for Sustainable Development
Groundwater for Sustainable Development Social Sciences-Geography, Planning and Development
CiteScore
11.50
自引率
10.20%
发文量
152
期刊介绍: Groundwater for Sustainable Development is directed to different stakeholders and professionals, including government and non-governmental organizations, international funding agencies, universities, public water institutions, public health and other public/private sector professionals, and other relevant institutions. It is aimed at professionals, academics and students in the fields of disciplines such as: groundwater and its connection to surface hydrology and environment, soil sciences, engineering, ecology, microbiology, atmospheric sciences, analytical chemistry, hydro-engineering, water technology, environmental ethics, economics, public health, policy, as well as social sciences, legal disciplines, or any other area connected with water issues. The objectives of this journal are to facilitate: • The improvement of effective and sustainable management of water resources across the globe. • The improvement of human access to groundwater resources in adequate quantity and good quality. • The meeting of the increasing demand for drinking and irrigation water needed for food security to contribute to a social and economically sound human development. • The creation of a global inter- and multidisciplinary platform and forum to improve our understanding of groundwater resources and to advocate their effective and sustainable management and protection against contamination. • Interdisciplinary information exchange and to stimulate scientific research in the fields of groundwater related sciences and social and health sciences required to achieve the United Nations Millennium Development Goals for sustainable development.
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