Line scan images of IODP Hole 389-M0101B@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次航次（夏威夷淹没礁课题）指定钻孔的线扫描图像集合。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，作业船为多用途船舶MMA Valour，往返航程始于并终于美国夏威夷巴伯斯角港；随后的陆上作业阶段于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, University of Bremen）托管的不来梅岩芯库（Bremen Core Repository, BCR）进行。 线扫描图像于陆上阶段采集：岩芯段经纵向劈分至工作半芯与存档半芯后，对清洁后的新鲜切割表面进行扫描。图像由设于MARUM的Avaatech Superslit X射线荧光（XRF）岩芯扫描仪的线扫描传感器获取，该扫描仪的线扫描程序采用Stemmer Common Vision Blox平台完成彩色图像的采集与处理。图像在横芯与纵芯方向的分辨率均约为150像素/厘米。 所有劈分岩芯均采用f/11+的光圈参数（取值固定为11至16之间的定值）；当岩芯色调偏深（如熔岩样品）时，光圈可上调至f/5.6；若岩质较浅（如部分珊瑚样品），则将光圈下调至f/13。本数据集包含经过整理裁剪的工作半芯与存档半芯图像，分别匹配对应最佳光圈参数。 文件命名遵循IODP标准命名规范：航次-站位钻孔-岩芯-岩芯类型-段-半芯。例如，文件389-M0109A-06R-1W.jpg对应389航次M0109A钻孔第6R号岩芯（R代表回转取芯法）第1段工作半芯的图像。[...]