Total carbon, total organic carbon, total inorganic carbon and total sulfur (solid-phase discrete samples) from IODP Hole 386-M0083B

Total carbon (TC), total organic carbon (TOC), total inorganic carbon (TIC) and total sulfur (TS) from solid-phase discrete samples of the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). The offshore phase of this expedition took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan, followed by an onshore phase onboard D/V Chikyu between 2022-02-14 – 2022-03-15. During the onshore phase a set of solid-phase samples, with a volume of approx. 10 cubic centimeters each, were taken with the purpose to be later on split into aliquots for the following three analyses: X-ray diffraction, carbon and X-ray fluorescence. The bulk solid-phase samples were taken from the work halves of core sections at about one sample per meter on average. Unprocessed samples were then shipped to the MARUM - Center for Marine Environmental Sciences of the University of Bremen (Germany), where they were freeze-dried, ground and homogenized to a fine powder by ECORD Science Operator staff using a pestle and an agate mortar. For TC, TOC and TS an aliquot of approx. 100 mg from each sample was measured using a CS744 LECO carbon-sulphur analyzer. TIC was determined by subtracting TOC from TC. All data are reported in weight percentage per dry sample with an analytical precision. Total nitrogen (TN, aliquot of approx. 30 mg) was analyzed with a Vario EL3 CHNS analyzer by Elementar. Because of technical issues, TN was only measured on samples from Sites M0081 and M0082.For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

本数据集涵盖国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震学研究）指定钻孔的固相离散样品的总碳（total carbon, TC）、总有机碳（total organic carbon, TOC）、总无机碳（total inorganic carbon, TIC）及总硫（total sulfur, TS）数据。
本次航次的海上作业阶段于2021年4月13日至2021年6月1日期间开展，搭载日本R/V Kaimei号调查船，往返于日本横须贺港；后续陆上处理阶段于2022年2月14日至2022年3月15日在‘地球’号钻探船（D/V Chikyu）上完成。
陆上阶段采集了单个体积约10立方厘米的固相样品组，后续将其分装为子样，用于三项分析：X射线衍射、碳分析与X射线荧光光谱分析。
批量固相样品取自岩心段的工作半面，平均采样密度约为每米1个样品。
未处理的样品被运送至德国不来梅大学海洋环境科学中心（MARUM, Center for Marine Environmental Sciences），由ECORD科学运营团队使用研钵和玛瑙研钵进行冷冻干燥、研磨并均质为细粉。
对于TC、TOC和TS，采用LECO CS744型碳硫分析仪对每份样品取约100 mg的子样进行测定。TIC通过TC减去TOC计算得到。所有数据以干样品重量百分比形式报告，并附有分析精密度。
总氮（total nitrogen, TN，取约30 mg子样）采用Elementar公司的Vario EL3型CHNS元素分析仪进行分析。受技术故障影响，TN仅在M0081和M0082站位的样品中完成测定。
更多方法学细节请参见Strasser M.等人2023年发表于《国际大洋发现计划会议论文集》的方法章节（https://doi.org/10.14379/iodp.proc.386.102.2023）