Total carbon, total organic carbon, and total inorganic carbon (solid-phase discrete samples) from IODP Hole 389-M0108B@en

Total carbon (TC), total organic carbon (TOC), and total inorganic carbon (TIC) content from solid-phase discrete samples 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 were taken from the work halves of core sections, 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. Bulk samples were subsequently 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. Sample aliquots of approx. 100 mg (TC) and 1 g (TOC) were processed through a CS744 LECO carbon-sulfur analyzer to obtain the respective concentrations. TIC was calculated as the difference between TC and TOC. […]本数据集包含国际大洋发现计划（International Ocean Discovery Program, IODP）389次航次（夏威夷淹没礁课题）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）及总无机碳（Total Inorganic Carbon, TIC）含量数据。本次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，作业船为多用途科考船"MMA Valour"，往返于美国夏威夷巴伯斯角港。后续的陆上样品处理阶段于2025年2月6日至2025年2月26日在由不来梅大学海洋环境科学中心（MARUM – Center for Marine Environmental Sciences）托管的不来梅岩芯库（Bremen Core Repository, BCR）内进行。陆上阶段中，科研人员从岩芯剖面的工作半段采集固相样品，单份样品体积约为10立方厘米，后续将其拆分为多份分样，用于以下三项分析：X射线衍射、碳组分分析及X射线荧光光谱分析。批量样品随后经冷冻干燥、研磨均质至粒径小于20微米的细粉，该流程由欧洲大洋钻探合作组织（ECORD）科学操作人员使用研钵、玛瑙研钵或球磨机完成。称取约100毫克（用于总碳检测）及1克（用于总有机碳检测）的样品分样，通过LECO CS744型碳硫分析仪进行检测，获得对应浓度数据。总无机碳浓度通过总碳与总有机碳的浓度差值计算得到。[…]