Gas hydrate enrichment mechanisms and reservoir characteristics are crucial for understanding their resource potential and role in the global carbon cycle. Traditional models emphasize coarse-grained sediments as primary hosts for hydrates, but recent studies show significant accumulations also occur in fine-grained systems. However, the influence of authigenic minerals, particularly porous framboidal pyrite, on reservoir prop...

Framboidal pyrite, a common form of authigenic pyrite in marine sediments, forms through the co-precipitation of equant, equidimensional microcrystals that can effectively sequester trace elements. Nevertheless, the relationships among key attributes of framboids (i.e., framboid size, microcrystal dimensions, and number of microcrystals) and the detailed mechanisms of trace−element enrichment within framboids are not yet well...