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U-Pb age determinations of uraninite by electron microprobe analyses of ore samples from two solution-collapse breccia pipe uranium deposits, Grand Canyon region, northwest Arizona, USA

Dates

Publication Date
Start Date
2020
End Date
2021

Citation

Barton, I.F., Barton, M.D., and Van Gosen, B.S., 2021, U-Pb age determinations of uraninite by electron microprobe analyses of ore samples from two solution-collapse breccia pipe uranium deposits, Grand Canyon region, northwest Arizona, USA: U.S. Geological Survey data release, https://doi.org/10.5066/P95CPDAD.

Summary

This data release compiles the electron microprobe spot analyses of U, Th, and Pb concentrations in uraninite (U oxide) particles, and corresponding calculated age determinations, measured in samples of ore from two uranium-copper breccia pipe ore bodies, the Canyon (Pinyon Plain) and Hack II deposits. The U-rich samples that were analyzed typify the deposits hosted by solution-collapse breccia pipes in the Grand Canyon region of northwestern Arizona. Applying procedures outlined by Bowles (1990), the U, Pb, and Th measurements from each spot analysis were used to calculate a model age for the formation of each uraninite particle. The U, Pb, and Th analyses and calculated age determinations are provided as additional information on [...]

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Attached Files

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Uraninite_sample_CHCM-053-21A.jpg
“Interstitial uraninite in sample CMCH-053-21A, Canyon (Pinyon Plain) deposit.”
thumbnail 39.85 KB image/jpeg
Bowles_1990_equation 1_modified.pdf
“Equation that was used in this study to reduce the microprobe analyses data.”
109.54 KB application/pdf
Microprobe_Analysis_U_Pb_Th_Canyon_Hack II_deposits.csv
“Electron microprobe analysis of uraninite particles in csv format.”
15.96 KB text/csv
Age_Calculations_U_Pb_Th_Canyon_Hack II_deposits.csv
“Age determinations based on microprobe analysis in csv format.”
8.69 KB text/csv

Purpose

This dataset contributes to the efforts to determine the ages of uranium oxide deposition in the U-Cu ore deposits hosted by solution-collapse breccia pipes in northern Arizona. These data are made available for use in geologic studies of the solution-collapse breccia pipe deposits and other uranium deposits of the Colorado Plateau Uranium Province.

Additional Information

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P95CPDAD

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