Sulphate reduction and methane oxidation rates of Håkon Mosby mud volcano sediments measured at station MSM16/2_855-1 (Sample 6, aged flow surface)

Sulfate reduction (SR) and anaerobic oxidation of methane (AOM) were measured ex situ by the whole core injection method (doi:10.1080/01490457809377722). We incubated the samples at in situ temperature (1.0°C) for 12 hours with either 14** CH4 (dissolved in water, 2.5 kBq) or carrier-free 35** SO4 (dissolved in water, 50 kBq). Sediment was fixed in 25 ml 2.5% sodium hydroxide (NaOH) solution or 20 ml 20% ZnAc solution for AOM or SR, respectively. Turnover rates were measured as previously described (http://edoc.mpg.de/177065; doi:10.4319/lom.2004.2.171).本数据集通过全岩芯注入法（whole core injection method）对硫酸盐还原（Sulfate reduction, SR）与甲烷厌氧氧化（anaerobic oxidation of methane, AOM）开展异位测量，相关方法参考文献doi:10.1080/01490457809377722。实验将样品置于原位温度（in situ temperature，1.0℃）下培养12小时，分别加入溶于水的14**CH4（2.5 kBq）或无载体（carrier-free）35**SO4（溶于水，50 kBq）。针对甲烷厌氧氧化与硫酸盐还原实验，分别采用25 mL 2.5%氢氧化钠（sodium hydroxide, NaOH）溶液与20 mL 20%乙酸锌（ZnAc）溶液对沉积物进行固定。周转速率（turnover rates）的测定方法参照已有研究（http://edoc.mpg.de/177065；doi:10.4319/lom.2004.2.171）。