Color Reflectance (Spectrophotometer) of IODP Hole 389-M0102C

Color reflectance spectrophotometry and colorimetry data from the above given hole of International Ocean Discovery Program (IODP) Expedition 389 (Hawaiian Drowned Reefs). The data where obtained during the onshore phase of expedition 389 which took place between 2025-02-06 to 2025-02-26 at the Bremen Core Repository (BCR) hosted at MARUM – Center for Marine Environmental Sciences, University of Bremen. After longitudinal splitting of the core sections, each archive half was scanned by a handheld Konica Minolta spectrophotometer (Model CM-2600d), recording data at approximately 2-cm sampling interval. Interval spacing was adjusted appropriately depending on the nature of the core (i.e., the presence of rubble, vugs, and fractures) and commented on in the data report. Measurements were taken in the most visibly homogeneous areas at each depth downcore to obtain as pure a color reflectance signal as possible. The obtained data is represented in the L*a*b* color coordinate system, where L* is a total reflectance index ranging 0%–100%, a* is green (<0) to red (>0) chromaticity, and b* is blue (<0) to yellow (>0) chromaticity. Furthermore, the analyses give Munsell color values , and intensity values for 31 contiguous 10 nm wide bands across the 360–740 nm interval of the light spectrum with a reflectance range of 0%–175% and a resolution of 0.01%. […]

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）指定钻孔的颜色反射分光光度法与比色法数据。数据采集于该航次2025年2月6日至2月26日期间的陆上后处理阶段，地点为不来梅大学海洋环境科学中心（MARUM – Center for Marine Environmental Sciences）托管的不来梅岩心库（Bremen Core Repository, BCR）。岩心剖面经纵向劈开后，采用手持柯尼卡美能达分光光度计（型号CM-2600d）对每个存档半岩心进行扫描，采样间隔约为2厘米；采样间距可根据岩心性质（如碎屑、晶洞与裂缝发育情况）适当调整，并在数据报告中予以备注。测量选取各深度段肉眼可见的最均一区域开展，以获取尽可能纯净的颜色反射信号。所得数据采用L*a*b*颜色坐标系表示：其中L*为总反射率指数，取值范围为0%~100%；a*为绿（<0）至红（>0）色度轴；b*为蓝（<0）至黄（>0）色度轴。此外，本次分析还提供了孟塞尔颜色值，以及光谱360~740 nm区间内31个连续10 nm带宽波段的强度值，其反射率范围为0%~175%，分辨率达0.01%。[…]