X-Ray fluorescence (XRF) of discrete samples from IODP Hole 386-M0092A

Results of X-Ray fluorescence (XRF) on discrete samples from 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 analysis of elemental composition of the bulk sediment using energy dispersive XRF (EDXRF) 4 g (±0.2 g) aliquot of the homogenized powder was used. Elemental concentrations were determined by ED-XRF spectroscopy utilizing a PANalytical Epsilon 3-XLE benchtop ED-XRF spectrometer operated in the MARUM sediment geochemistry laboratory.For further details see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

本数据集为国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震学研究）指定钻孔的离散样品X射线荧光（X-ray fluorescence, XRF）测试结果。该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，作业船为日本“海明”号（R/V Kaimei），往返航线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日在“地球”号（D/V Chikyu）钻探船上进行。陆上作业阶段采集了一批固相样品，单个体积约10立方厘米，后续将其分装为子样，用于三项分析：X射线衍射、碳元素分析及X射线荧光测试。批量固相样品取自岩芯剖面的工作半块，平均采样间距约1米。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科学运维团队使用研钵与玛瑙研杵完成冷冻干燥、研磨及均质化处理，制成细粉。采用能量色散X射线荧光（energy dispersive XRF, EDXRF）分析bulk沉积物的元素组成时，称取4克（±0.2克）均质粉末子样；元素浓度通过MARUM沉积物地球化学实验室中的PANalytical Epsilon 3-XLE台式EDXRF光谱仪完成测定。更多细节可参见Strasser M.等人2023年发表的相关方法章节，链接为https://doi.org/10.14379/iodp.proc.386.102.2023