Orphan Lode (Grand Canyon)
Arizona, Coconino County, South Rim of the Grand Canyon, United States
UraniumU (Cu)
- Type
- Uranium-bearing collapse breccia pipe
Circular vertical collapse breccia pipe in Pennsylvanian and Permian limestones of the Arizona Strip, uranium concentrated in the matrix and fractures, Late Triassic mineralisation; fluid inclusions at 80 to 170 °C and 9 to 19 wt% NaCl eq. from secondary sources cited by Balboni et al. (2016); highest 87Sr/86Sr ratio of the study. Uraninite 87Sr/86Sr measured by Balboni et al. (2016) for nuclear forensics: low ratios (below 0.7200) in low-temperature sandstone deposits, high in pegmatites, veins and breccia pipes. Coordinates from Mindat.
87Sr/86Sr isotope ratio, no unit Values of the same system
Standard : NIST SRM 987
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.76288 ± 0.000012 | 1 | breccia pipe uraninite Single analysis; value read from the Figure 7 label, 2σ uncertainty; highest ratio of the study. | Balboni et al. (2016), Chemical and Sr isotopic characterization of North America uranium… |
Deposits of the same type
- Cameron district (uraniferous petrified wood) United States
- Skyline Mine (Monument Valley) United States
- Happy Jack Mine (White Canyon) United States
- Marshall Pass district United States
- Billiken Lode (Critchell area) United States
- Key Lake (Deilmann and Gaertner) Canada
- Shea Creek (Athabasca) Canada
- Athabasca basin (unconformity uranium province) Canada
Cite this page
IsoFind Atlas (2026). Orphan Lode (Grand Canyon), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/orphan-lode-grand-canyon/ (accessed 2026-10-15).
@misc{isofind2026orphanlodegrandcanyonisotopes,
title = {Orphan Lode (Grand Canyon), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/orphan-lode-grand-canyon/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15