一个综合的实验建模方法,以确定碳矿化在断裂的岩石和超岩石岩石的关键过程
Chelsea W Neil1, Yun Yang1, Haylea Nisbet1
1Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
PNAS nexus
|September 23, 2024
概括
在破碎的岩石中地质碳封存显示出减少大气CO2的前景. 了解断裂演变和地化学反应是有效的长期碳储存的关键.
科学领域:
- 地球科学 地球科学 地球科学
- 环境科学 环境科学
- 地质化学 地质化学
背景情况:
- 大气变暖需要减少和消除二氧化碳排放.
- 地质碳捕获 (GCS) 涉及将二氧化碳注入地下以进行矿化.
- 玛菲岩和超玛菲岩具有快速碳矿化潜力,但孔隙性/透性较低.
研究的目的:
- 为了研究GCS,在破碎的岩石/超岩石中研究碳矿化过程.
- 了解地质化学反应和断裂网络演变之间的相互作用.
- 识别控制矿物化的关键因素,并为建模方法提供信息.
主要方法:
- 实验数据和数值建模的整合.
- 分析断裂孔径,流量和表面特征.
- 热水力机械化学 (THMC) 模型的开发.
主要成果:
- 断裂特征极大地影响碳酸盐沉物的数量,身份和形态.
- 实验和建模方法揭示了碎裂的mafic/ultramafic系统中的关键过程.
- 在这些岩石类型中确定了GCS的关键系统组件和挑战.
结论:
- 将地质化学相互作用与断裂网络演变相结合,对于可持续的GCS至关重要.
- 岩石和超岩石中的GCS需要先进的建模,以解释断裂网络动态.
- 需要进一步的研究,以克服挑战,并优化碳矿化在这些形式.
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