Stillwater Complex, Montana: Logs of core drilled by Chrome Corporation of America in the Mountain View area, 1988 to 1990

This dataset includes TIFF (Tagged Image File Format) images of graphic drill core logs showing associated drill core information, a TIFF image of the explanation for the lithology and structure sections of the logs, an Esri shapefile of the locations of the drill holes, and 17 individual .csv files of tabular data that were compiled from handwritten drill core logs. The drill core is from the Mountain View area of the Stillwater Complex, Montana and was drilled from 1988 to 1990 by the Chrome Corporation of America. The data shown in the graphic drill logs and contained within the .csv files includes lithologic, structure, grain size, sulfide, chromite, chromium, platinum, palladium, copper, and nickel mineralization information. The graphic drill logs were created using Golden software's Strater 5 drill core visualization software and are provided with both logarithmic and linear scales. The graphic drill logs are plotted using the depth recorded in the drill logs and do not reflect true thickness. Two of the drill holes, MV89-550 and MV89-551, were logged by two different geologists (Dr. Roger Cooper and Rob Kell). The data shown in the graphic logs for those two holes were taken from Roger Cooper's logs, with the exception of the interval from 0 to 133 feet for drill hole MV89-550, which was taken from Rob Kell's log, as Roger Cooper did not log that interval for that particular drill hole. The .csv file names for Roger Cooper's logs contain "RC" in the file name and Rob Kell's contain "RK". Some intervals of the drill core that correlate to chromitite zones were logged at two different scales: 1"=1' and 1"=10'. All instances of question marks ("?") represent original data as written by the geologist. In areas where the hand-written notes were unreadable, the notation of "[unreadable]" was used. See USGS SIR 2014-5183 (https://pubs.usgs.gov/sir/2014/5183/) for report and spatial data relating to the Stillwater Complex.

本数据集包含以下内容：一是标注图像文件格式（TIFF，Tagged Image File Format）的图解岩心编录图像，附带相关岩心数据；二是TIFF格式的岩性与构造剖面编录说明图像；三是Esri形状文件（Esri shapefile）格式的钻孔位置数据集；以及17个由手写岩心编录整理得到的表格型.csv文件。
该岩心采自美国蒙大拿州斯蒂尔沃特杂岩（Stillwater Complex）的芒廷维尤（Mountain View）矿区，由美国铬业公司（Chrome Corporation of America）于1988年至1990年钻探完成。
图解岩心编录及.csv文件中涵盖的数据集内容包括岩性、构造、粒度、硫化物、铬铁矿、铬、铂、钯、铜、镍等矿化相关信息。
图解岩心编录采用Golden软件的Strater 5岩心可视化软件制作，同时提供对数刻度与线性刻度两种显示模式。该图解编录以编录记录的深度为绘图基准，未反映真实地层厚度。
编号为MV89-550与MV89-551的两个钻孔，分别由两位不同的地质学家——罗杰·库珀（Roger Cooper）博士与罗布·凯尔（Rob Kell）完成编录。上述两个钻孔的图解编录数据均取自罗杰·库珀的编录成果，但钻孔MV89-550的0至133英尺段除外，该段数据取自罗布·凯尔的编录记录，因罗杰·库珀未对该钻孔的该段进行编录。
罗杰·库珀编录数据对应的.csv文件名称中包含"RC"字样，罗布·凯尔编录数据对应的.csv文件则包含"RK"字样。
部分对应铬铁矿带的岩心段，采用两种不同比例尺进行编录：1英寸=1英尺与1英寸=10英尺。
所有问号（"?"）均保留了地质学家原始手写记录的形式；在手写注释无法识别的区域，采用了"[unreadable]"这一标注。
如需获取与斯蒂尔沃特杂岩相关的报告及空间数据，请参阅美国地质调查局（USGS）SIR 2014-5183号报告（https://pubs.usgs.gov/sir/2014/5183/）。