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δ238U of Groundwater: published values

in ‰ (per mil)

Groundwater. 31 published values for 3 deposits or sites. Standards, minerals and sources for every value.

DepositsValueRangenMineral or matrixSource
Smith Ranch-Highland mine unit MU4a groundwater
United States
−0.91 ± 0.08 ‰−1.08 / −0.82 ‰9groundwater up-gradient of the orebody (dissolved uranium)Brown et al. (2016), Isotopic evidence for reductive immobilization of uranium across a r…
Smith Ranch-Highland mine unit MU4a groundwater
United States
−1.57 ± 0.39 ‰−1.95 / −1.17 ‰3groundwater of wells adjacent to mine unit MU4a (dissolved uranium)Brown et al. (2016), Isotopic evidence for reductive immobilization of uranium across a r…
Smith Ranch-Highland mine unit MU4a groundwater
United States
−2.04 ± 0.41 ‰−2.81 / −1.73 ‰6groundwater down-gradient of the orebody, reduced wells (dissolved uranium)Brown et al. (2016), Isotopic evidence for reductive immobilization of uranium across a r…
Smith Ranch-Highland mine unit MU4a groundwater
United States
−0.53 ± 0.13 ‰−0.62 / −0.43 ‰2groundwater down-gradient of the orebody, wells M452 and M458 (dissolved uranium)Brown et al. (2016), Isotopic evidence for reductive immobilization of uranium across a r…
Smith Ranch-Highland mine unit MU4a groundwater
United States
−0.1 ± 0.24 ‰−0.41 / 0.15 ‰4ore-zone groundwater after mining (dissolved uranium)Brown et al. (2016), Isotopic evidence for reductive immobilization of uranium across a r…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−2.99 ± 0.29 ‰1water of well BL11 (area KPA1, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−0.86 ± 0.27 ‰1water of well BLEK2 (area KPA1, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
0.21 ± 0.26 ‰1water of well BL1240 (area KPA2, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−0.77 ± 0.3 ‰1water of well BL8505 (area KPA3, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−0.43 ± 0.27 ‰1water of well MW85b (area KPA3, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−0.11 ± 0.3 ‰1water of well MW17 (area KPA1, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−3.96 ± 0.72 ‰1water of well MW40 (area KPA2, reducing zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−1.47 ± 0.23 ‰1water of well MW43 (area KPA2, reducing zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−0.06 ± 0.38 ‰1water of well MW15 (area KPA1, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−0.67 ± 0.75 ‰1water of well MW79 (area KPA3, reducing zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Kingsville Dome uranium deposit (baseline and monitoring wells)
United States
−0.06 ± 0.61 ‰1water of well MW21 (area KPA1, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
0.01 ± 0.24 ‰1water of well BL7 (area RPA1, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
0.09 ± 0.18 ‰1water of well BL10 (area RPA2b, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
0.34 ± 0.24 ‰1water of well BL22 (area RPA2a, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−0.03 ± 0.22 ‰1water of well BL28 (area RPA3, ore zone, ore extracted, restoration not yet undertaken)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
0.36 ± 0.23 ‰1water of well BL29 (area RPA3, ore zone, ore extracted, restoration completed)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−0.54 ± 0.22 ‰1water of well BL36 (area RPA4, ore zone, no extraction undertaken)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
0.53 ± 0.23 ‰1water of well MW25 (area RPA1, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−1.73 ± 0.2 ‰1water of well MW34 (area RPA1, reducing zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−0.05 ± 0.21 ‰1water of well MW45 (area RPA2a, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
0.07 ± 0.32 ‰1water of well MW66 (area RPA2b, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−1.47 ± 0.2 ‰1water of well MW75 (area RPA3, reducing zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−1.26 ± 0.25 ‰1water of well MW85 (area RPA2a, reducing zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−1.21 ± 0.26 ‰1water of well MW102 (reducing zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−0.34 ± 0.15 ‰1water of well MW129 (area RPA3, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…
Groundwater of the Rosita uranium deposit (baseline and monitoring wells)
United States
−0.01 ± 0.26 ‰1water of well MW160 (area RPA4, oxidising zone, monitoring well)Placzek et al. (2016), Uranium isotope composition of waters from South Texas uranium ore…

Published δ238U (uranium) values, deposit by deposit

Cite this page

IsoFind Atlas (2026). δ238U of Groundwater: published values. https://www.isofind.tech/isotopes/en/uranium-d238u/groundwater/ (accessed 2026-10-16).

@misc{isofind2026238uofgroundwaterpublishedval,
  title = {δ238U of Groundwater: published values},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/uranium-d238u/groundwater/},
  note = {Accessed 2026-10-16}
}

Updated : 2026-10-16