Uranium hydrogeochemical and stream sediment reconnaissance of the Bozeman NTMS quadrangle, Montana
A total of 1251 water and 1536 sediment samples were collected from 1586 locations over a 17 400-km/sup 2/ area at a nominal density of one location per 10 km/sup 2/. Samples were collected predominantly from surface streams although 38 ground water locations were also sampled. The uranium concentrations in waters sampled range from below the detection limit of 0.20 ppB to 41.35 ppB, with a mean concentration of 1.17 ppB. Waters with anomalous uranium concentrations as defined were found in tributaries of the Boulder River which drain Precambrian rocks in the Beartooth Mountains and in tributaries of the Three Forks basin which are underlain predominantly by Tertiary-Quaternary sediments. The two areas appearing most favorable for future exploration on the basis of water data are in the Three Forks basin in the vicinity of the Madison plateau and in a district about 20 km due west of Three Forks. Sediment samples from the quadrangle were found to have uranium concentrations that range from 0.90 ppM to 94.30 ppM, with a mean concentration of 3.71 ppM. The majority of anomalous sediment samples were collected from areas underlain by Precambrian rocks. Based on the data from sediments, the areas appearing most favorable for future exploration include the tributaries of the Boulder River in the Beartooth Mountains, the northern part of the Madison Range, and the Tobacco Root Mountains just north of Virginia City. The uranium concentrations in the sediments from these areas are probably associated with uraniferous siliceous veins or pegmatites.
- Research Organization:
- Los Alamos Scientific Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6442861
- Report Number(s):
- GJBX-8(79); LA-7504-MS
- Country of Publication:
- United States
- Language:
- English
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