Uranium-Series Constraints on Radionuclide Transport and Groundwater Flow Beneath the Nopal I Uranium Deposit, Sierra Pena Blanca, Mexico Page: 3 of 18

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238U series:

238U (cc, 4.5 by) -> 234Th (p, 24.1 d) -> 234U ((,

248 ky)-+ 230TH

(a, 75.4 ky) -> 226Ra (a,

3.8 d) -4 ... -> 210Pb (p,

235U series:

(p,

22.3 y) -* 210Po (r/

235U (a, 0.71 by)

22.0 y) -4 227Th (a,

18.6 d)

-, 231P a

(a,

.6 ky) -> 222Rn (V
138.4 C) -> 20Pb
32.8 ky) 227Ac
11.1 d) -+ ...-4

-* 223Ra (ut

232T1 series:

232Th (a, 14.2 by)

-> 228Ra (p,

5.75 y)

-, 228Th

1.91 y) -> 224Ra (ci.

3.64 d) ->... -> 208Pb

I

(a,

I Y

207 Pb

f OSTaI

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Foldstein, S.; Luo, S.; Ku, R. & Murrell, M. Uranium-Series Constraints on Radionuclide Transport and Groundwater Flow Beneath the Nopal I Uranium Deposit, Sierra Pena Blanca, Mexico, article, April 27, 2006; Las Vegas, Nevada. (digital.library.unt.edu/ark:/67531/metadc880494/m1/3/ocr/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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