Biological Sulfate Reduction in Deep Subseafloor Sediment of Guaymas Basin.

ABSTRACT: Sulfate reduction is the quantitatively most important process to degrade organic matter in anoxic marine sediment and has been studied intensively in a variety of settings. Guaymas Basin, a young marginal ocean basin, offers the unique opportunity to study sulfate reduction in an environment characterized by organic-rich sediment, high sedimentation rates, and high geothermal gradients (100-958°C km^-1). We measured sulfate reduction rates (SRR) in samples taken during the International Ocean Discovery Program (IODP) Expedition 385 using incubation experiments with radiolabeled ³⁵SO₄ ^2- carried out at in situ pressure and temperature. The highest SRR (387 nmol cm^-3 d^-1) was recorded in near-surface sediments from Site

SUBMITTER: Nagakura T 

PROVIDER: S-EPMC8927301 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature