Cerro Negro (Marianas-San Marcos vein system)
Santa Cruz (Deseado Massif, Patagonia), Argentina
Epithermal depositsAu-Ag
- Type
- Low-sulfidation Au-Ag epithermal (Jurassic)
A major deposit in Argentine Patagonia, discovered in 2006 and mined by Newmont since 2014. Its low-sulfidation veins are hosted in ignimbrites of the Chon Aike Formation (Middle Jurassic). It is the first Argentine deposit in the database, complementing the Aysén province in Chile.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −2 / −1 ‰ | hydrothermal fluid (δ34S) Value calculated for the hydrothermal fluid water, not measured directly on the sulfides. A small share of magmatic sulfur, typical of low-sulfidation systems. The first three mineralisation episodes are indistinguishable. | Vidal et al. 2016, The Marianas-San Marcos vein system: characteristics of a shallow low … |
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −3 / 0 ‰ | hydrothermal fluid (water δ18O) A fluid dominated by meteoric and volcanic water, at 290 to 230 °C, with salinity below 3% NaCl equivalent. Value calculated from fluid inclusions and silicates at equilibrium. | Vidal et al. 2016, Mineralium Deposita |
Deposits of the same type
- Aysén, southern group (Fachinal, Mina Silva) Chile
- Aysén, southernmost group (El Faldeo, Lago Chacabuco, Lago Cochrane) Chile
- Aysén, northern group (El Toqui, Katerfeld) Chile
- San José (Oruro) Bolivia
- Pueblo Viejo Dominican Republic
- Guanajuato Mexico
- Zacatecas Mexico
- Fresnillo Mexico
Cite this page
IsoFind Atlas (2026). Cerro Negro (Marianas-San Marcos vein system), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/cerro-negro-filons-marianas-san-marcos/ (accessed 2026-10-06).
@misc{isofind2026cerronegromarianassanmarcosve,
title = {Cerro Negro (Marianas-San Marcos vein system), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/cerro-negro-filons-marianas-san-marcos/},
note = {Accessed 2026-10-06}
}Updated : 2026-10-06