Gold Hyper-Enrichment driven by Dense Fluid Layers at the Pyrite–Fluid Interface

Key Points

• The study aims to explain the paradox of gold hyper-enrichment in geological fluids through the behavior at the pyrite-fluid interface.
• Utilized in situ liquid cell transmission electron microscopy to observe the interface dynamics.
• Investigated the nucleation and growth of gold in a nano-scaled environment.
• Combined observations with advancements in oil-water interface chemistry and piezoelectric effects.
• Identified a dense fluid layer at the pyrite-fluid interface that facilitates rapid gold nucleation.
• Observed gold enrichment levels near 10,000 times the initial concentration.
• Proposed that electrochemical processes at mineral-fluid interfaces are crucial for effective mineral enrichment.

Abstract