Benasque Pass mines (Mina Peak)
Central Pyrenees (Huesca), Lys-Caillaouas massif, Spain
OtherZn-Pb
- Type
- Pre-Variscan stratabound Zn-Pb, remobilised in Variscan structures
Silicified, brecciated ore with Fe-rich sphalerite, galena and pyrrhotite in the short limb of the Mina Peak syncline, reworked by Variscan greenschist-facies thrusts. Late Ordovician to Early Devonian lead model age: mineralisation linked to pre-Variscan extension of the Gondwana margin, similar to the Aran Valley. Indicative coordinates.
δ34S in ‰ (per mil) Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 13.2 ± 2.2 ‰ | 11.7 / 14.8 ‰ | 2 | sphalerite Mean and standard deviation recalculated from 2 samples, Table 2. Sphalerite-galena pairs: 120 to 250 °C. | García-Sansegundo et al. (2014), Structural control and geological significance of the Zn… |
| 9.6 ± 3.7 ‰ | 7 / 12.2 ‰ | 2 | galena Mean and standard deviation recalculated from 2 samples, Table 2. | García-Sansegundo et al. (2014), Structural control and geological significance of the Zn… |
δ18O in ‰ (per mil) Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.4 ± 0.9 ‰ | 14.4 / 16 ‰ | 3 | quartz cementing mineralised breccias Mean and standard deviation recalculated from 3 samples, Table 2. | García-Sansegundo et al. (2014), Structural control and geological significance of the Zn… |
| 9.81 / 11.41 ‰ | 3 | calculated fluid in equilibrium with quartz (400 °C) Range given in the text, with the fractionations of Zhang et al. (1989) at the regional metamorphic temperature: crustal metamorphic fluid. | García-Sansegundo et al. (2014), Structural control and geological significance of the Zn… |
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.09 ± 0.005 | 18.087 / 18.094 | 2 | galena Mean and standard deviation recalculated from 2 samples, Table 3. Close to the Aran Valley (Cardellach et al., 1996): 206Pb/204Pb of 18.02 to 18.08. | García-Sansegundo et al. (2014), Structural control and geological significance of the Zn… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.691 ± 0.001 | 15.69 / 15.692 | 2 | galena Mean and standard deviation recalculated from 2 samples, Table 3. Close to the Aran Valley (Cardellach et al., 1996): 206Pb/204Pb of 18.02 to 18.08. | García-Sansegundo et al. (2014), Structural control and geological significance of the Zn… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 38.31 ± 0.016 | 38.299 / 38.321 | 2 | galena Mean and standard deviation recalculated from 2 samples, Table 3. Close to the Aran Valley (Cardellach et al., 1996): 206Pb/204Pb of 18.02 to 18.08. | García-Sansegundo et al. (2014), Structural control and geological significance of the Zn… |
Deposits of the same type
- Largentière France
- Eyller Bruch bog iron ore Germany
- Stelvio Italy
- Oris Italy
- Lahn-Dill ores (Grube Fortuna, Wetzlar) Germany
- Mourne Mountains (tin placers) United Kingdom
- Mount Gabriel Irlande
- Derrycarhoon Irlande
Cite this page
IsoFind Atlas (2026). Benasque Pass mines (Mina Peak), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/mines-du-col-de-benasque-pic-de-la-mina/ (accessed 2026-10-13).
@misc{isofind2026benasquepassminesminapeakisot,
title = {Benasque Pass mines (Mina Peak), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/mines-du-col-de-benasque-pic-de-la-mina/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13