Cerro de Pasco
Pasco, central Peru, Peru
Epithermal depositsCu-Zn-Pb-Ag (Au)
- Type
- Epithermal Cu-Zn-Pb-Ag linked to a Miocene diatreme
Polymetallic epithermal deposit at the contact of a Miocene diatreme: pyrrhotite pipes with Zn-Pb-Ag (stage A), quartz-pyrite body (B), Zn-Pb-Ag-Cu replacement bodies and pyrite-enargite Cu-Ag-Au veins (C1, C2). Saintilan et al. (2021): stage C2 initial Os 0.15 to 1.22, the least radiogenic enargite carrying the magmatic imprint. Coordinates: mean of the Table 1 samples (UTM 18S) converted to degrees.
187Os/188Os isotope ratio, no unit Values of the same system
Standard : Rapport absolu, sans standard de référence
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.05 ± 0.16 | 0.8 / 1.22 | 5 | main-stage pyrite, initial ratio (age 14.5-14.4 Ma) Mean and standard deviation recalculated from 5 analyses, 0.80 to 1.22 (CP-3-Py-a 0.80; CP-3-Py-b 1.05; CP-3-Py-c 1.01; CP-6-Py-a 1.15; CP-6-Py-b 1.22). Present-day ratios: CP-3-Py-a 0.82 (187Re/188Os 76, Os 19.9 ppt); CP-3-Py-b 1.07 (187Re/188Os 116, Os 24.3 ppt); CP-3-Py-c 1.05 (187Re/188Os 144, Os 15.5 ppt); CP-6-Py-a 1.15 (187Re/188Os 22.6, Os 116 ppt); CP-6-Py-b 1.23 (187Re/188Os 25.3, Os 106 ppt). | Saintilan et al. (2021), Osmium isotopic constraints on sulphide formation in the epither… |
| 0.71 ± 0.45 | 0.15 / 1.16 | 4 | main-stage enargite, initial ratio (age 14.5-14.4 Ma) Mean and standard deviation recalculated from 4 analyses, 0.15 to 1.16 (CP-3-Ena-a 0.15; CP-6-Ena-a 0.56; CP-6-Ena-b 0.96; CP-6-Ena-c 1.16). Present-day ratios: CP-3-Ena-a 0.15 (187Re/188Os 3.5, Os 186 ppt); CP-6-Ena-a 0.56 (187Re/188Os 15.1, Os 41 ppt); CP-6-Ena-b 0.97 (187Re/188Os 31, Os 22.4 ppt); CP-6-Ena-c 1.17 (187Re/188Os 42, Os 24.1 ppt). | Saintilan et al. (2021), Osmium isotopic constraints on sulphide formation in the epither… |
Deposits of the same type
- Colquijirca Peru
- Julcani Peru
- Quiruvilca Peru
- Orcopampa Peru
- San José (Oruro) Bolivia
- Lavisa-Ocurí Bolivia
- Pulacayo Bolivia
- San Cristóbal (Nor Lípez) Bolivia
Cite this page
IsoFind Atlas (2026). Cerro de Pasco, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/cerro-de-pasco/ (accessed 2026-10-21).
@misc{isofind2026cerrodepascoisotopesignatures,
title = {Cerro de Pasco, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/cerro-de-pasco/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21