X-ray diffraction results from IODP Hole 389-M0099E
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Results of X-ray diffraction (XRD) analyses from the above given hole of International Ocean Discovery Program (IODP) Expedition 389 (Hawaiian Drowned Reefs). The offshore phase of this expedition took place between 2023-08-31 and 2023-10-31 onboard multipurpose vessel MMA Valour sailing from and to Barbers Point Harbor, Hawai'i, USA, followed by the onshore phase from 2025-02-06 to 2025-02-26 at the Bremen Core Repository (BCR) hosted at MARUM – Center for Marine Environmental Sciences, University of Bremen. During the onshore phase a set of solid-phase samples, with a volume of approx. 10 cubic centimeters each, were taken from the work halves of core sections with the purpose to be later on split into aliquots for the following three analyses: X-ray diffraction, carbon analyses and X-ray fluorescence. Unprocessed samples were freeze-dried, ground and homogenized to a fine powder (<20 µm particle size) by ECORD Science Operator staff using a pestle and an agate mortar or a ball mill. The aliquots for XRD analysis were prepared with the Philips backloading system in the Crystallography and Geomaterials Research laboratories of the Geoscience Department at the University of Bremen (Germany). X-ray diffractograms were measured on a Bruker D8 Discover diffractometer. Mineral identification and semi-quantification were done using the Philips software X'Pert HighScore Version 1.2 (Degen et al., 2014, https://doi.org/10.1017/S0885715614000840) following concepts of Vogt (2009, https://doi.org/10.2204/iodp.proc.302.203.2009). Measurement results are all given in weight percent (wt%). […]
本数据集为国际大洋发现计划（International Ocean Discovery Program, IODP）389次航次（夏威夷淹没礁）指定钻孔的X射线衍射（X-ray diffraction, XRD）分析结果。该航次的海上作业阶段于2023年8月31日至2023年10月31日开展，作业平台为多用途科考船"MMA Valour"，往返航点为美国夏威夷州巴伯斯角港；陆上作业阶段则于2025年2月6日至2025年2月26日在不来梅大学MARUM海洋环境科学中心下属的不来梅岩芯库（Bremen Core Repository, BCR）进行。 陆上作业期间，科研人员从岩芯剖面的工作半块中采集单个体积约10立方厘米的固相样品，后续将其拆分为多份分装试样，用于以下三项分析：X射线衍射、碳元素分析与X射线荧光光谱分析。未处理的原始样品经冷冻干燥后，由欧洲大洋钻探科学作业团队（ECORD Science Operator）工作人员使用研钵、玛瑙研杵或球磨机研磨均质至粒径小于20微米的细粉。 用于X射线衍射分析的试样由德国不来梅大学地球科学系晶体学与地质材料研究实验室采用飞利浦背装样系统制备。X射线衍射谱图通过布鲁克D8 Discover衍射仪采集。矿物鉴定与半定量分析依托飞利浦X'Pert HighScore 1.2版软件完成，分析方法遵循Vogt（2009）的研究框架，软件相关引用文献为Degen等人2014年发表的成果（https://doi.org/10.1017/S0885715614000840）。所有测试结果均以重量百分比（wt%）标注。[…]
