Opal
Southern California or southern Nevada (Mojave region, Basin and Range), United States
OtherPb (Zn, Ag)
- Type
- Basin and Range lead prospect or mine (no production described in the paper)
Locality of Table 2 of Church et al. (2005) (Gn and sp in calcite from mine dump). Published coordinates (n° 5 : 37°04′07″ N, 117°59′49″ O).
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.915 | 1 | galena Single analysis (n° 5 (Gel-N)). | Church et al. (2005), Base- and precious-metal deposits in the Basin and Range of Souther… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.716 | 1 | galena Single analysis (n° 5 (Gel-N)). | Church et al. (2005), Base- and precious-metal deposits in the Basin and Range of Souther… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 39.225 | 1 | galena Single analysis (n° 5 (Gel-N)). | Church et al. (2005), Base- and precious-metal deposits in the Basin and Range of Souther… |
Deposits of the same type
- Overholtz United States
- Morning Star # 2 United States
- S. Badger Flat United States
- Green Monster United States
- Whiteside United States
- Unnamed prospect no. 12 of Church et al. (2005) United States
- Unnamed prospect no. 13 of Church et al. (2005) United States
- Big Silver United States
Cite this page
IsoFind Atlas (2026). Opal, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/opal-basin-and-range/ (accessed 2026-10-21).
@misc{isofind2026opalisotopesignatures,
title = {Opal, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/opal-basin-and-range/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21