San Rafael
Eastern Cordillera (southeast), Peru
PorphyriesSn-W
- Type
- Sn-W porphyry with associated Cu-Zn-Pb-Ag
An Oligocene to Miocene tin-tungsten deposit in southeastern Peru. It formed by mixing of a reduced, tin-rich magmatic fluid with an oxidised meteoric fluid. Successive tourmaline generations (Tur 1 to Tur 3) record the evolution of the hydrothermal system.
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.6 / 19.3 | hydrothermal tourmaline (Tur 1 to Tur 3 generations) Initial ratios (206Pb/204Pb(i) and following), corrected for radioactive decay since about 25 Ma. They agree with the signature of the San Rafael granites (206Pb/204Pb(i) of 18.6 to 18.8). | Harlaux et al. 2020, Tourmaline trace element and isotope geochemistry at San Rafael Sn-W… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.6 / 16 | hydrothermal tourmaline Initial 207Pb/204Pb(i) ratio. | Harlaux et al. 2020, San Rafael tourmaline isotope study |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 38.6 / 39.7 | hydrothermal tourmaline Initial 208Pb/204Pb(i) ratio. | Harlaux et al. 2020, San Rafael tourmaline isotope study |
Deposits of the same type
- Llallagua Bolivia
- Chuquicamata Chile
- Escondida Chile
- Cañariaco Peru
- El Teniente Chile
- Climax United States
- Henderson United States
- Bingham Canyon United States
Cite this page
IsoFind Atlas (2026). San Rafael, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/san-rafael/ (accessed 2026-10-06).
@misc{isofind2026sanrafaelisotopesignatures,
title = {San Rafael, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/san-rafael/},
note = {Accessed 2026-10-06}
}Updated : 2026-10-06