Thin section images of drill core and hand samples from the Stillwater Mine area, Stillwater Complex, Montana

This dataset includes photographic images of thin sections created from hand samples and drill core from the Stillwater Complex, Montana, along with a shapefile representing the locations of the underground samples and drill hole collars. The samples were collected and core was drilled in order to define platinum-group element resources associated with the J-M Reef at the Stillwater Mine in the Stillwater Complex. The images of the entire thin section, both in plane- and cross-polarized light, were taken using a high-resolution digital camera on a macro stand. The data in each zip file is organized into a folder containing the 'RAW' unprocessed .CR2 images (when available) and associated .xmp metadata files, and a folder containing processed .jpg images. Folders with a "p1" or "p2" designation (representing parts 1 and 2) were organized into two parts in response to file size restrictions. Folders with "DH" in the folder name contain images taken from drill core samples. The SWTR_Mine_Underground_Samples" folder contains images taken from hand samples from underground mine workings. The file name of each photograph correlates to the sample ID or name and depth (in feet) of the drill hole from which the thin section was sourced, and whether the photograph represents a plane-polarized (ppl) or cross-polarized (xpl) light image. For example, the "11795-1.8_ppl.JPG" file is a plane-polarized image of the thin section sourced from drill hole 11795 at a depth of 1.8 feet. Multiple images from the same drill hole and depth are identified with "(2)", "(3)", etc. in the file name. The .jpg and .CR2 images have Section 508 compliant metadata as per USGS section 508 compliancy officer guidelines. The .xmp files are included with the 'RAW' .CR2 files because the original .CR2 metadata cannot be altered. In order to add descriptive information to the metadata, the .xmp files must be included. The edited image metadata for the .jpg files can be viewed using software such as Adobe Photoshop, Adobe Elements, or windows file explorer. The raw .CR2 images edited metadata can be viewed in Adobe Photoshop and Adobe Elements, but not using windows file explorer. Adobe Elements and Adobe Photoshop recognize the link of the .xmp file with it's corresponding .CR2 file, and windows file explorer does not. For the .CR2 images, only the original metadata, created when the photograph was taken, can be be viewed using windows file explorer.

本数据集包含取自美国蒙大拿州斯蒂尔沃特杂岩体（Stillwater Complex）的手标本与岩心所制备的薄片的摄影图像，以及标注地下标本与钻孔孔口位置的形状文件（shapefile）。本次标本采集与岩心钻探工作，旨在探明斯蒂尔沃特杂岩体中斯蒂尔沃特矿（Stillwater Mine）内与J-M Reef相关的铂族元素资源。整套薄片的平面偏振光（plane-polarized light，简称ppl）与交叉偏振光（cross-polarized light，简称xpl）图像，均通过搭载于微距支架的高分辨率数码相机拍摄。每个压缩包内的数据均分为两个文件夹：一个存放未处理的原始.CR2图像（如有）与关联的.xmp元数据文件，另一个存放经过处理的.jpg图像。带有“p1”或“p2”标识（分别代表第一部分与第二部分）的文件夹，因受文件大小限制而被分为两个分卷。文件夹名称中包含“DH”的目录，存放取自岩心标本的图像。名为“SWTR_Mine_Underground_Samples”的文件夹，存放取自地下采矿作业工作面手标本的图像。每张照片的文件名均与薄片来源的钻孔标本ID/名称、钻孔深度（单位：英尺），以及该照片采用的偏振光类型相关。例如，文件“11795-1.8_ppl.JPG”为取自钻孔11795中1.8英尺深度处薄片的平面偏振光图像。同一钻孔同一深度处的多张图像，会在文件名中以“(2)”“(3)”等后缀加以区分。.jpg与.CR2图像的元数据均符合美国地质调查局（USGS）Section 508条款合规官员指南中规定的Section 508标准。.xmp文件与原始.CR2文件一并提供，原因是.CR2文件的原始元数据无法被修改。为向元数据中补充描述性信息，必须配套提供.xmp文件。.jpg文件的编辑后元数据，可通过Adobe Photoshop、Adobe Elements或Windows文件资源管理器查看。原始.CR2图像的编辑后元数据，仅可通过Adobe Photoshop与Adobe Elements查看，无法通过Windows文件资源管理器查看。Adobe Elements与Adobe Photoshop可识别.xmp文件与其对应.CR2文件的关联关系，而Windows文件资源管理器则无法实现这一点。对于.CR2图像而言，仅可通过Windows文件资源管理器查看拍摄照片时生成的原始元数据。