Dissolved inorganic carbon isotopes in pore waters of ODP Leg 204 sediments@en

Isotopic characterization of carbon in the dissolved inorganic carbon (DIC) pool is fundamental for a wide array of scientific studies directly related to gas hydrate research. In order to generate integrated and internally consistent data of d13C of DIC in pore waters from Hydrate Ridge, we used the modern continuous flow technology of a GasBench II automated sampler interfaced to a gas source stable isotope mass spectrometer for the rapid determination (~80 samples/day) of d13C DIC in small-volume water samples. The overall precision of this technique is conservatively estimated to be better than ±0.15 per mil (1 sigma), which is similar to the precision of methods in current use. Here we present the data generated from Ocean Drilling Program Leg 204 pore water samples.溶解无机碳（dissolved inorganic carbon, DIC）库中的碳同位素表征，对于诸多与天然气水合物研究直接相关的科学研究具有基础性意义。为获取水合物脊孔隙水中DIC的δ¹³C的整合且内部一致的数据集，研究团队采用了与气源稳定同位素质谱仪联用的GasBench II自动进样器的现代连续流技术，可实现小体积水样中DIC的δ¹³C的快速测定，单日可处理约80个样品。经保守估算，该技术的总体精密度优于±0.15‰（1σ），与当前主流分析方法的精密度水平相当。本数据集源自大洋钻探计划（Ocean Drilling Program）204航次的孔隙水样品。