Venting gas is converted partially into CO2 and H2S by methane oxidizing archaea and sulfate reducing bacteria in gas seep sites, inducing seep carbonates precipitation.

• 部分渗漏天然气通过细菌作用转变为二氧化碳，同时海水硫酸盐被还原为硫化氢，与孔隙水中的钙和铁结合而沉淀冷泉碳酸盐岩。