USGS: Science for a Changing World - USGS visual identity mark and link to main Web site at


Whole Rock Geochemical Data For Altered And Mineralized Rocks, Red Dog Zn-Pb-Ag District, Western Brooks Range, Alaska

John F. Slack, Karen D. Kelley, and Jeffrey L. Clark

Index map of Brooks Range study area in Alaska   This report presents geochemical analyses for 220 mostly altered and mineralized rock samples from the Red Dog Zn-Pb-Ag district in the western Brooks Range of northern Alaska. These data form the basis for a study by Slack et al. (2004a) on hydrothermal silicification and related alteration in wall rocks of the Red Dog deposits and the Anarraaq deposit 10 km to the northwest. The sulfide deposits occur within the Ikalukrok unit (informal name) of the Mississippian Kuna Formation (Moore and others, 1986). Principal rock types that were analyzed include black and gray shale, unmineralized bedded barite, mineralized (sulfide-rich) bedded barite, sulfide-rich silica rock (replaced barite), massive and semimassive sulfide, vein chalcedony, and Brookian (Cretaceous) vein quartz. For stratigraphic completeness, data are also reported here for a limited number of unaltered and unmineralized samples of black and gray shale, laminated carbonate-rich shale, lithic turbidite, bedded siliceous rock, calcareous radiolarite, and tectonic mélange. Detailed descriptions of the sampled sulfide deposits and their stratigraphic settings are given in Slack and others (2004a) and Kelley and others (2004a, b). The geochemical analyses are presented here in Microsoft Excel and .dbf (part of .zip file) formats in order to facilitate calculations and plotting of data. A related geochemical database on unaltered Paleozoic sedimentary rocks of the western Brooks Range is available in Slack and others (2004b).

GIS data package [96K ZIP file; includes shapefile]
Excel spread sheet

U.S. Department of the Interior, U.S. Geological Survey
For more information, contact John F. Slack
Maintained by Eastern Publications Group
Last modified: 23:38:32 Sat 12 Jan 2013
Privacy statement | General disclaimer | Accessibility