Color data (RGB) of IODP Hole 386-M0082A

Color data obtained from split core sections from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology) during the onshore phase. The onshore phase of expedition 386 took place between 2022-02-14 – 2022-03-15 onboard D/V Chikyu. After longitudinal splitting of the core sections, high-resolution (100 pixels/cm) images of archive half was captured using the Tri-Sensor Core Logger (TSCL; NS Design). The camera provides a 16-bit red-green-blue (RGB) color (48-bit) TIFF file from which the RGB data were derived in 1 mm down-core resolution. For each section: 1) the TIFF file (from line scanning) full resolution was opened and channels scaled to 0-255; 2) TIFF file cut at top (2475 px) and bottom (2470 px + length of the section x resolution); 3) for every line of pixel down section, R, G, B values were averaged over a width of 450 px across the centre of the section (\~4.5 cm width) and data placed into a table compiling all sections of a hole; 4) for every depth interval, where a piece of sponge was observed on the linescan, R, G, B data were deleted; 5) R, G, B data were also deleted to the top and bottom ~1 cm of each section, to account for possible gaps or pieces of liner.For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

本数据集的颜色数据来源于国际海洋发现计划（IODP）第386航次（日本海沟古地震学）期间，上述指定钻孔的岩心劈分样本在陆上阶段采集所得。第386航次的陆上阶段于2022年2月14日至2022年3月15日在地球号钻探船（D/V Chikyu）上开展。岩心样本纵向劈分后，使用三传感器岩心记录仪（TSCL；NS Design）采集存档半岩心的高分辨率（100像素/厘米）图像。该设备的相机生成16位红绿蓝（RGB）色彩（48位）TIFF文件，从中可提取沿岩心深度方向分辨率为1毫米的RGB数据。对于每个岩心段：1）打开线扫描获取的全分辨率TIFF文件，并将各通道缩放至0-255范围；2）对TIFF文件进行顶部（2475像素）和底部（2470像素+岩心段长度×分辨率）裁剪；3）沿岩心段深度方向的每一行像素，取岩心段中心区域450像素宽度（约4.5厘米）内的R、G、B值平均值，并将数据录入包含某钻孔所有岩心段的表格中；4）在线扫描图像中观察到海绵块的深度区间，删除其对应的R、G、B数据；5）为排除可能的间隙或衬管碎片影响，删除每个岩心段顶部和底部约1厘米范围内的R、G、B数据。更多方法学细节请参见Strasser, M.等（2023）的方法章节，DOI：https://doi.org/10.14379/iodp.proc.386.102.2023。