IODP Expedition 402 Thin section images

Hard rock and sediment thin section images were acquired using either the JRSO-developed Petrographic Image Capture and Archival Tool (PICAT) imager or (rarely) an upright microscope and a digital camera. Sample images are acquired in unpolarized, polarized, and/or cross-polarized light. Image files are presented compressed by hole.本数据集所包含的硬岩与沉积岩薄片图像，采集方式分为两类：其一为使用JRSO研发的岩相图像捕获与存档成像仪（Petrographic Image Capture and Archival Tool，缩写PICAT）；其二为极少数情况下采用正置显微镜搭配数码相机完成采集。样本图像将在非偏振光、偏振光及正交偏振光条件下采集。所有图像文件均按钻孔分组进行压缩后对外提供。