Line scan images of IODP Hole 389-M0102C@en

Collection of line scan images 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. Line scan images were obtained during the onshore phase from the cleaned fresh cut surfaces directly after longitudinal splitting of core sections into work and archive halves. Images were obtained using the line scan sensor of the Avaatech Superslit X-ray fluorescence (XRF) core scanner in operation at MARUM. The line scan program of this scanner uses the Stemmer Common Vision Blox platform to acquire and process color images. Image resolution is ~150 pixel/cm in the crosscore and downcore direction. All split cores were measured using aperture setting f/11+ (a fixed value between 11 and 16). When cores were darker (e.g., in lava), the aperture was increased to up to f/5.6, and for lighter rocks (e.g., some corals) the aperture was decreased to f/13. This dataset includes the curated cropped images of working and archive halves for the best fitting aperture, respectively. File naming follows standard IODP file naming convention: Exp-SiteHole-CoreCoretype-SectionHalf. For example, a file 389-M0109A-06R-1W.jpg identifies the image of the working half of section 1, core 6R (R indicating rotary coring method), from Hole M0109A from Expedition 389. […]

本数据集包含国际大洋发现计划（International Ocean Discovery Program, IODP）389次科考航次（夏威夷淹没礁课题）对应钻孔的系列线扫描图像。
本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，作业载体为多用途科考船"MMA Valour"，往返航点为美国夏威夷州巴伯斯角港。随后开展的陆上处理阶段于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）进行。
本次数据集的线扫描图像采集于陆上处理阶段，取自岩芯样品经纵向劈分为工作半芯与归档半芯、并完成表面清洁后的新鲜断层面。图像采集采用部署于MARUM的Avaatech Superslit X射线荧光（X-ray fluorescence, XRF）岩芯扫描仪的线扫描传感器完成。该扫描仪的线扫描程序依托Stemmer Common Vision Blox平台，完成彩色图像的采集与处理工作。
图像在横芯方向与沿芯深度方向的分辨率均约为150像素/厘米。所有劈分后的岩芯均采用f/11+档位的光圈参数进行扫描，该档位的固定取值区间为11至16。当岩芯色调偏深时（如熔岩样品），可将光圈上调至最大f/5.6；对于色调偏浅的岩石（如部分珊瑚样品），则将光圈下调至f/13。
本数据集包含经过精选与裁剪的工作半芯、归档半芯图像，二者分别对应最佳适配的光圈扫描参数。文件命名遵循IODP标准命名规范，格式为：航次编号-钻孔标识-岩芯号与取芯类型-岩芯段号-半芯标识。示例：文件389-M0109A-06R-1W.jpg 代表来自389航次M0109A钻孔的6号岩芯（R表示旋转取芯法）第1段工作半芯的图像。[…]