This dataset pertains to the manuscript titled 'Enhanced preservation of refractory organic carbon by reactive iron at the sulfate-methane transition in cold-seep sediments."

Table S1. The pore-water solutes in four push cores in site F. Table S2. The bulk parameters in four push cores in site F. Table S3. Microbial community compositions of the top 30 orders in sediments in site F. Table S4. Microbial community compositions of sulfate-reducing bacteria (SRB), anaerobic methanotrophic archaea (ANME) and sulfur-oxidizing bacteria (SOB) in sediments in site F.