Interstitial water geochemistry results of IODP Hole 389-M0099G@en

Results of interstitial water (IW) geochemistry 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. Sampling for IW geochemistry took place offshore immediately upon core recovery where soft sediments where recovered and using Rhizon samplers. The Rhizone samplers were left in the sediment for extraction of interstitial water for a minimum of 2 hours, aiming at drawing enough IW per sample from the core sections to fulfill the IODP standard IW sample splitting plan that included as many eight fractions. In addition to IW from the core sections, reference samples of the surface seawater (SSW) were collected (s. dataset \"Surface seawater geochemistry results of IODP Expedition 389 (Hawaiian Drowned Reefs)\"). Quality flag \"#0\" indicates the measurements' result was below detection limit. […]本数据集为国际大洋发现计划（International Ocean Discovery Program, IODP）389航次（夏威夷淹没礁课题）指定钻孔的间隙水（interstitial water, IW）地球化学分析成果。本航次海上作业时段为2023年8月31日至2023年10月31日，搭载多用途科考船“MMA Valour”号，往返于美国夏威夷州巴伯斯角港；陆上样品处理阶段则于2025年2月6日至2025年2月26日，在不来梅大学海洋环境科学中心（MARUM – Center for Marine Environmental Sciences）下属的不来梅岩芯库（Bremen Core Repository, BCR）开展。间隙水地球化学采样于海上岩芯回收后即刻进行，针对采集到的软沉积物样品，采用Rhizon采样器完成采样。将采样器置于沉积物中至少2小时，以从各岩芯段中获取足量间隙水样品，满足国际大洋发现计划标准间隙水样品分样方案——该方案要求将单一样品拆分为最多8个组分。除岩芯段间隙水样品外，还采集了表层海水（surface seawater, SSW）对照样品（详见数据集《IODP 389航次（夏威夷淹没礁）表层海水地球化学分析结果》）。质量标记“#0”表示对应测量结果低于检测限。[…]