Total carbon, total organic carbon, total inorganic carbon and total sulfur (solid-phase discrete samples) from IODP Hole 386-M0089C

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. […]

本数据集包含国际大洋发现计划（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）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，搭载日本科考船"海明号"（R/V Kaimei），往返于日本横须贺港；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"钻探船（D/V Chikyu）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，后续将这些样品分装为子样以开展三项分析：X射线衍射（X-ray diffraction, XRD）、碳组分分析与X射线荧光（X-ray fluorescence, XRF）分析。主体固相样品取自岩心段的工作半片，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德国不来梅大学海洋环境科学中心（MARUM - Center for Marine Environmental Sciences of the University of Bremen），由ECORD科学运维团队使用研钵与玛瑙研杵将样品冻干、研磨并均质化为细粉。针对总碳（TC）、总有机碳（TOC）与总硫（TS），每份样品取约100 mg的子样，使用CS744型LECO碳硫分析仪进行测定。总无机碳（TIC）通过总碳（TC）减去总有机碳（TOC）计算得到。所有数据以干样品重量百分比形式发布，并附带分析精度信息。总氮（Total Nitrogen, TN）取约30 mg的子样，使用Elementar公司的Vario EL3型CHNS分析仪进行分析。受技术故障影响，仅对M0081和M0082两个站位的样品开展了总氮测定。[……]