Chemical weathering associated with dissolution/precipitation at interfaces between minerals and flowing fluids is key for the evolution of geologic systems, including groundwater contamination and storage capacity. Relying on Atomic Force Microscopy (AFM) yields reaction rates at nanoscale resolutions. Challenges limiting our ability to quantify heterogeneity associated with these processes include establishing reliable platforms allowing AFM imaging of real-time and in situ absolute material fluxes across mineral surfaces under continuous flow conditions to complement typically acquired surface topography images. We provide an experimental workflow and heterogeneous absolute rates at the nanoscale across the surface of a calcite crystal under dissolution. These high-quality experimental observations are then interpreted through a stochastic approach. The latter is geared to embed diverse kinetic modes driving the degree of spatial heterogeneity of the reaction and corresponding to different mechanistic processes documented across the crystal surface.

中文翻译：

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流体-矿物界面溶解的随机评估

与矿物和流动流体之间界面处的溶解/沉淀相关的化学风化是地质系统演化的关键，包括地下水污染和储存能力。依靠原子力显微镜 (AFM) 可实现纳米级分辨率的反应速率。限制我们量化与这些过程相关的异质性的能力的挑战包括建立可靠的平台，允许在连续流动条件下对矿物表面的实时和原位绝对材料通量进行 AFM 成像，以补充通常采集的表面形貌图像。我们提供了实验工作流程和溶解下方解石晶体表面纳米级的异质绝对速率。然后通过随机方法解释这些高质量的实验观察结果。后者旨在嵌入不同的动力学模式，驱动反应的空间异质性程度，并对应于晶体表面记录的不同机械过程。