内生CO2和流星H2O的混合导致了极其高效的碳酸盐溶解
Wojciech Wróblewski1, Pavel Bella2, Marek Drewnik3
1Institute of Geological Sciences, Jagiellonian University in Kraków, Gronostajowa 3A, 30-387 Kraków, Poland.
The Science of the total environment
|May 19, 2024
概括
流星水与天然气通风口相互作用,导致碳酸盐岩石的快速蚀腐蚀. 这一由溶解的二氧化碳 (CO2) 驱动的过程产生了显著的表面陷,并展示了极端的溶解速度.
科学领域:
- 地质化学 地质化学
- 卡斯特地质形态的地质形态.
- 环境科学环境科学
背景情况:
- 岩腐蚀通常涉及吸收CO2的流星水或携带内源气体 (CO2,H2S) 的深循环水.
- 一个独特的场景涉及石水与天然气喷口上升的内源气体相互作用.
研究的目的:
- 为了研究一种特殊的岩腐蚀变体,石水吸收上升的内源气体.
- 量化这个过程的溶解速率和地形效应.
主要方法:
- 在斯洛伐克的一座浮石丘上观察天然气通风口.
- 在池雨水中分析溶解的固体和度.
- 在位于通风口的石灰石板上测量腐蚀速率.
主要成果:
- 气体通风口的雨水达到了3.2g/L溶解固体的矿化.
- 一升池水溶解了高达800毫克的,速度超过5.8毫克/升·分钟.
- 石灰石板块的腐蚀率高达126mm/ka,相当于极端的石环境.
结论:
- 这一过程代表了极端形式的岩石腐蚀,与沿海岩石和硫酸化相比较.
- 地形效应包括在内源性CO2喷口附近的梯形岩上的表面陷.
- 这种类型的腐蚀可能在碳酸盐岩石释放内源性二氧化碳的地方普遍存在.
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