Total carbon, total organic carbon, total inorganic carbon and total sulfur (solid-phase discrete samples) from IODP Hole 386-M0088D@en

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. […]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）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）与总硫（Total Sulfur, TS）数据。本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，作业平台为日本“开南号”（R/V Kaimei）考察船，往返航次始于并终于日本横须贺港；随后的陆上作业阶段于2022年2月14日至2022年3月15日期间在“地球号”（D/V Chikyu）钻探船上完成。陆上作业阶段采集了一批固相样品，单个体积约为10立方厘米，后续将被分装为子样以开展三项分析：X射线衍射（X-ray diffraction）、碳组分分析与X射线荧光（X-ray fluorescence）分析。主体固相样品取自岩芯剖面的工作半块，平均采样密度约为每米1个样品。未处理的样品随后被运送至不来梅大学海洋环境科学中心（MARUM - Center for Marine Environmental Sciences，德国），由ECORD科学运营团队人员使用研钵和玛瑙研杵将样品冷冻干燥、研磨并均质为细粉。针对总碳（TC）、总有机碳（TOC）与总硫（TS），每份样品取约100 mg子样，使用CS744型LECO碳硫分析仪进行测试。总无机碳（TIC）通过总碳（TC）与总有机碳（TOC）的差值计算得到。所有数据均以干样品重量百分比形式上报，并附带分析精度信息。总氮（Total Nitrogen, TN，取约30 mg子样）由Elementar公司的Vario EL3型CHNS分析仪完成测试。受技术问题影响，总氮（TN）仅在M0081和M0082站位的样品中完成测试。[……]