Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089885 |
Microseismic events cause significant pH drops in groundwater | |
M. Stillings; R. J. Lunn; S. Pytharouli; Z. K. Shipton; M. Kinali; R. Lord; S. Thompson | |
2020-12-17 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Earthquakes cause rock fracturing, opening new flow pathways which can result in the mixing of previously isolated geofluids with differing geochemistries. Here we present the first evidence that seismic events can significantly reduce groundwater pH without the requirement for fluid mixing, solely through the process of dynamic rock fracturing. At the Grimsel Test Site, Switzerland, we observe repeated, short‐lived groundwater pH drops of 1‐3.5 units, while major and minor ion groundwater concentrations remain constant. Acidification coincides with reservoir drainage and induced microseismic events. In laboratory experiments, we demonstrate that fresh rock surfaces made by particle cracking interact with the in situ water molecules, likely through creation of surface silanols and silica radicals, increasing the H+ concentration and significantly lowering groundwater pH. Our findings are significant; pH exerts a fundamental control on the rate and outcome of most aqueous geochemical reactions and microseismic events are commonplace, even in seismically inactive regions. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/308131 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | M. Stillings,R. J. Lunn,S. Pytharouli,et al. Microseismic events cause significant pH drops in groundwater[J]. Geophysical Research Letters,2020. |
APA | M. Stillings.,R. J. Lunn.,S. Pytharouli.,Z. K. Shipton.,M. Kinali.,...&S. Thompson.(2020).Microseismic events cause significant pH drops in groundwater.Geophysical Research Letters. |
MLA | M. Stillings,et al."Microseismic events cause significant pH drops in groundwater".Geophysical Research Letters (2020). |
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