San Miguel (Pyrite Belt)
Huelva (Iberian Pyrite Belt), Spain
Volcanogenic massive sulfidesCu-Zn-Pb (pyrite)
- Type
- Volcanogenic massive sulphide
Volcanogenic massive sulphide body of the northern Iberian Pyrite Belt, hosted by felsic volcanic rocks of the volcano-sedimentary complex (early Tournaisian to middle Visean), metamorphosed at sub-greenschist facies (about 350 °C). Mine no longer in production. Quartz-pyrite-chlorite stockwork, chloritised footwall rhyolites. Stockwork fluid inclusions (sample SM-7): Th 160 to 240 °C (median 188 °C), 5.2 to 9.7 wt% NaCl eq. Nearby post-Hercynian quartz veins: Th 119 to 270 °C, 1.7 to 6.7 wt% NaCl eq., meteoric fluid (δ18O -2.3 ‰, δD -10 ‰ measured by decrepitation). Coordinates not given.
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 11 ‰ | 1 | stockwork vein quartz (sample SM.7) Single analysis; fluid calculated at 188 °C: -1.4 ‰. | Sánchez-España et al. (2003), Source and evolution of ore-forming hydrothermal fluids in … | |
| 10.1 ± 1.42 ‰ | 9 / 11.7 ‰ | 3 | chloritised footwall rhyolite (whole rock) Mean and standard deviation recalculated from 3 analyses, fluid calculated at 330 °C at +4.5 to +7.2 ‰ (feldspar fractionation). | Sánchez-España et al. (2003), Source and evolution of ore-forming hydrothermal fluids in … |
| 11.2 ‰ | 1 | post-Hercynian vein quartz (sample SM.PROC) Single analysis, late barren vein rather than ore; fluid calculated at 173 °C: -2.3 ‰, on the meteoric water line with the measured δD. | Sánchez-España et al. (2003), Source and evolution of ore-forming hydrothermal fluids in … |
δD in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −56.43 ± 0.9 ‰ | −57 / −55.4 ‰ | 3 | chloritised footwall rhyolite (whole rock) Mean and standard deviation recalculated from 3 analyses, calculated fluid -12.0 to -10.4 ‰; the SMR1 fluid δD is printed '-12.08.02' in the table (read as -12.0 ‰). | Sánchez-España et al. (2003), Source and evolution of ore-forming hydrothermal fluids in … |
| −10 ‰ | 1 | fluid inclusion water in post-Hercynian vein quartz (SM.PROC) Single measurement of the fluid itself: post-Hercynian meteoric water, distinct from the ore fluids. | Sánchez-España et al. (2003), Source and evolution of ore-forming hydrothermal fluids in … |
Deposits of the same type
- Iberian Pyrite Belt (representative example) Spain/Portugal
- Neves-Corvo Portugal
- Kidd Creek Canada
- Flin Flon Canada
- Rio Tinto Spain
- Cyclades (Kondaros-Katsimouti and Triades) Greece
- Boliden Sweden
- Tharsis Spain
Cite this page
IsoFind Atlas (2026). San Miguel (Pyrite Belt), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/san-miguel-ceinture-pyriteuse/ (accessed 2026-10-14).
@misc{isofind2026sanmiguelpyritebeltisotopesig,
title = {San Miguel (Pyrite Belt), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/san-miguel-ceinture-pyriteuse/},
note = {Accessed 2026-10-14}
}Updated : 2026-10-14