(Table 3) Abundance and isotope composition of hydrogen and carbon extracted ...

Sediment depth is given in mbsf. Average blank was expressed in ppm for each step by dividing blank amount (in mmol) by average sample weight ( 200 mg).

沉积物深度以海底以下米（meters below seafloor, mbsf）为单位给出。针对每个分析步骤，平均空白值以百万分比（parts per million, ppm）表征，其计算方式为将空白量（单位：毫摩尔，mmol）除以平均样品重量（200毫克，mg）。