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Geochemical Data Release for Idaho Primitive Area, including the contiguous Clear Creek-Upper Big Deer Creek Area, the Salmon River Breaks Primitive Area, the Sawtooth Primitive Area, and adjacent areas, central Idaho

April 8, 2020

The data release for the Idaho Primitive Area, including the contiguous, Clear Creek-Upper Big Deer Creek Area, Salmon River Breaks Primitive Area, the Sawtooth Primitive Area, and adjacent areas, central Idaho, contains a data set of previously unpublished geochemical data from the 1966-1984 projects. The purpose of the Primitive Area studies was to describe the geology, determine petrologic and geochemical characteristics and to evaluate the mineral resource potential of the primitive areas and of adjacent study areas. In the case of the Idaho Primitive Area study (Cater and all, 1973), the primitive area and adjacent study areas added in 1967 covers 1,915 square miles plus 272 square miles adjacent to the area for a total 2,187 square miles; the contiguous Clear Creek-Upper Big Deer Creek Area was studied separately (Cater and others, 1975) and adds 85 square miles. The Salmon River Breaks Primitive Area study (Weis and others, 1972) covers 420 square miles of primitive area and adjacent study areas, and the Sawtooth Primitive Area study (Kiilsgaard and others, 1970) covers 434 square miles of primitive area and adjacent study areas. In addition, the previously unpublished data of 65 rock samples collected and analyzed under the Gospel-Hump Wilderness Area project are included. This data release of 5,167 samples is made up of 2,667 stream sediment samples, 1,201 rock samples, 194 soil samples, 94 bulk pan concentrate samples, and one precipitate sample. More than 99 percent of these samples were analyzed by semi-quantitative visual 6-step emission spectrography multi-element scan. Many samples were also analyzed by flame-atomic absorption spectrophotometry for silver, gold, silver, cobalt, copper, lead and zinc; by colorimetry for arsenic, cobalt, copper, heavy metals, fluorine, antimony, uranium, and tungsten; by atomic absorption spectrophotometry for mercury after thermal release; and by gamma ray counting for uranium and thorium. Also analyzed with these samples were many standard reference material samples. The data for these standards are not included in this data release. Included in this data set are 1,329 samples for which accurate site location information was not available. Also, 1,010 samples are referred to as geologic material samples as more specific sample media type information was not available. These data may still be valuable to the user and are included in this data set.