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Reactive nano-interfaces and fluid-rock interactions in orogenic mineral systems: implications for sustainable
1School of Earth Sciences and Resources, China University of Geosciences (Beijing), Haidian District, Beijing, 100080, China. 18642692602@163.com.
Environmental Geochemistry and Health
|February 6, 2026
Summary
Reactive nano-interfaces control fluid flow and metal ore formation in orogenic systems. Nanoscale processes at mineral surfaces and in nanopores dictate permeability and metal transport, influencing large-scale geological patterns.
Area of Science:
- Geochemistry
- Mineralogy
- Hydrogeology
- Materials Science
Background:
- Fluid-rock interactions, mineral transformations, and metal redistribution are critical in orogenic systems for permeability evolution and ore formation.
- The interplay between nanoscale interfacial processes and larger-scale fluid pathways remains poorly understood.
- Metamorphic-hydrothermal conditions significantly influence these nanoscale reactions and their macroscopic consequences.
Purpose of the Study:
- To review and synthesize current knowledge on reactive nano-interfaces governing fluid-rock reactions, metal mobility, and permeability under metamorphic-hydrothermal conditions.
- To evaluate the role of nanoscale controls on these processes using evidence from diverse experimental, analytical, and modeling studies.
- To connect nanoscale observations to larger-scale phenomena like metal focusing and ore zonation in orogenic systems.
Main Methods:
- Synthesis of experimental, analytical, and modeling studies.
- Analysis of high-resolution transmission electron microscopy (HR-TEM), atomic force microscopy (AFM), and synchrotron-based X-ray spectroscopies (XANES/EXAFS, STXM).
- Review of batch and flow-through experiments, alongside reactive transport modeling.
Main Results:
- Mineralogical substrates show significant variations in nanoporosity, surface roughness, and reactive surface area, affecting adsorption and reaction efficiency.
- Nanocrystalline iron oxyhydroxides and swelling clays are highly reactive, with nanopores acting as dominant reaction domains.
- Metal adsorption (e.g., Pb2⁺, Cd2⁺, As(V)) is rapid and surface-controlled, with strong mineralogical influence on capacity, reversibility, and speciation.
- Synchrotron techniques reveal preferential metal accumulation along grain boundaries and within nanopores, with localized redox heterogeneity.
- Reactive transport studies demonstrate transient permeability enhancement followed by pore clogging and flow localization.
Conclusions:
- Reactive nano-interfaces are key regulators of metal transport, retention, and mineralization efficiency in orogenic systems.
- Upscaling nanoscale processes provides mechanistic understanding for observed metal focusing and ore zonation patterns.
- Further research integrating nanoscale insights is crucial for a comprehensive understanding of geological fluid-rock systems.
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