X-Ray fluorescence (XRF) of discrete samples from IODP Hole 386-M0089C

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

国际大洋发现计划（International Ocean Discovery Program，IODP）第386航次（日本海沟古地震学）上述钻孔离散样品的X射线荧光（X-Ray fluorescence，XRF）分析结果。该航次的海上阶段于2021年4月13日至6月1日在日本海洋研究船“开明”号（R/V Kaimei）上进行，往返于日本横须贺；随后的陆上阶段于2022年2月14日至3月15日在“地球号”钻探船（D/V Chikyu）上开展。陆上阶段采集了一批固相样品，每个样品体积约10立方厘米，旨在后续分成等分试样用于以下三项分析：X射线衍射（X-ray diffraction）、碳分析和XRF分析。批量固相样品取自岩心剖面的工作半段，平均每米约取一个样品。未处理的样品随后被运至德国不来梅大学海洋环境科学中心（MARUM），由ECORD科学操作人员使用研杵和玛瑙研钵进行冷冻干燥、研磨并均化为细粉末。为使用能量色散X射线荧光（energy dispersive X-Ray fluorescence，EDXRF）分析批量沉积物的元素组成，取4克（±0.2克）均化粉末等分试样进行测试。元素浓度通过MARUM沉积物地球化学实验室运行的PANalytical Epsilon 3-XLE台式ED-XRF光谱仪测定。更多细节参见Strasser, M.等人2023年发表的方法章节，DOI：https://doi.org/10.14379/iodp.proc.386.102.2023。