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.

该数据集包含用于展示相关钻孔岩心信息的图解岩心测井图TIFF（标签图像文件格式，Tagged Image File Format）图像、用于说明测井图岩性与构造剖面的TIFF图像、记录钻孔位置的Esri形状文件（Esri shapefile），以及17份从手写钻孔岩心测井记录整理得到的CSV（逗号分隔值，Comma-Separated Values）表格数据文件。本次采集的岩心取自美国蒙大拿州斯蒂尔沃特杂岩（Stillwater Complex）的山景区，由美国铬业公司（Chrome Corporation of America）于1988年至1990年间钻探获取。图解岩心测井图及CSV文件中包含的数据涵盖岩性、构造、粒度、硫化物、铬铁矿、铬、铂、钯、铜以及镍的矿化信息。该图解岩心测井图由Golden软件公司的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形式。图解岩心测井图依据测井记录中的深度进行绘制，并未反映真实厚度。其中两个钻孔MV89-550与MV89-551的测井工作由两位不同的地质学家完成：罗杰·库珀博士与罗布·凯尔。这两个钻孔的图解测井图数据均取自罗杰·库珀的测井记录，唯钻孔MV89-550的0至133英尺井段除外——该井段数据取自罗布·凯尔的测井记录，因罗杰·库珀未对该钻孔的该井段进行测井。罗杰·库珀测井记录对应的CSV文件名包含"RC"标识，罗布·凯尔的则包含"RK"标识。部分与铬铁矿带相关的岩心井段采用两种不同比例尺进行测井：1英寸=1英尺与1英寸=10英尺。所有问号（"?"）均代表地质学家手写记录的原始数据。对于手写记录无法辨认的区域，采用"[unreadable]"标识进行标注。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）发布的SIR 2014-5183号报告（https://pubs.usgs.gov/sir/2014/5183/）。