Pebble
Alaska (southwest, Bristol Bay region), United States
PorphyriesCu-Au-Mo
- Type
- Cu-Au-Mo porphyry
One of the largest undeveloped porphyry deposits in the world. The West zone carries hypogene mineralisation overprinted by supergene enrichment and a thin leached cap; the contiguous East zone is hypogene only. Copper isotopes trace both ancient fluid pathways and present-day weathering.
δ65Cu in ‰ (per mil) Values of the same system
Standard : NIST SRM 976
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.18 ± 0.66 ‰ | −1.48 / 2.28 ‰ | 66 | hypogene ore (chalcopyrite, pyrite) Mean and standard deviation of 66 samples from Table 1. | Mathur et al. (2013), Modern and Paleofluid Pathways Revealed by Cu Isotope Compositions … |
| −0.5 ± 1.94 ‰ | −5.04 / 1.88 ‰ | 9 | supergene ore (chalcocite, covellite, malachite) Mean and standard deviation of 9 samples from Table 1. | Mathur et al. (2013), Modern and Paleofluid Pathways Revealed by Cu Isotope Compositions … |
| −1.39 ± 1.45 ‰ | −3.49 / 0.68 ‰ | 6 | leached cap (jarosite, goethite) Mean and standard deviation of 6 samples from Table 1. | Mathur et al. (2013), Modern and Paleofluid Pathways Revealed by Cu Isotope Compositions … |
Deposits of the same type
- Bingham Canyon United States
- Bingham Canyon United States
- Climax United States
- Henderson United States
- Cañariaco Peru
- San Rafael Peru
- Llallagua Bolivia
- Chuquicamata Chile
Cite this page
IsoFind Atlas (2026). Pebble, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/pebble/ (accessed 2026-10-06).
@misc{isofind2026pebbleisotopesignatures,
title = {Pebble, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/pebble/},
note = {Accessed 2026-10-06}
}Updated : 2026-10-06