Total carbon, total organic carbon, total inorganic carbon and total sulfur (solid-phase discrete samples) from IODP Hole 386-M0083C

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）及总硫（Total Sulfur, TS）数据。本航次海上作业阶段于2021年4月13日至2021年6月1日在日本R/V Kaimei号科考船上开展，往返日本横须贺港；随后的陆上处理阶段于2022年2月14日至2022年3月15日在D/V Chikyu号钻探船上进行。陆上阶段采集了一批单个体积约10立方厘米的固相样品，后续将其分装为子样以开展三项分析：X射线衍射（X-ray diffraction）、碳组分分析及X射线荧光（X-ray fluorescence）光谱分析。块状固相样品取自岩心段的工作半面，平均每米采集1个样品。未处理的样品随后被运往德国不来梅大学海洋环境科学中心（MARUM），由ECORD科学运维人员使用研钵和玛瑙研杵完成冷冻干燥、研磨及均质化细粉制备流程。针对TC、TOC和TS，称取每份样品约100 mg的子样，采用LECO CS744碳硫分析仪进行测定；TIC通过TC与TOC的差值计算得到。所有数据以干样品的重量百分比形式报告，并标注分析精度。总氮（Total Nitrogen, TN，称取约30 mg子样）使用Elementar公司的Vario EL3 CHNS分析仪开展分析。受技术故障影响，TN仅在M0081和M0082两个站位的样品中完成测定。更多方法学细节可参考Strasser M.等人2023年发表的相关研究：https://doi.org/10.14379/iodp.proc.386.102.2023