Lousal
Grândola, Alentejo (Iberian Pyrite Belt), Portugal
Volcanogenic massive sulfidesCu-Zn-Pb (pyrite)
- Type
- Volcanogenic massive sulfide
Volcanogenic massive sulfide body of the Iberian Pyrite Belt, hosted by the volcano-sedimentary complex (Late Devonian to Visean). Its lead is very homogeneous over 250 km and close to that of the host acid lavas (Marcoux, 1998). José orebody, mined until 1988; its gossan was studied together with the ore. Indicative coordinates.
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18.177 ± 0.007 | 18.169 / 18.185 | 4 | massive sulfides (bulk ore or galena separate) Mean and standard deviation recalculated from 4 samples, Table 1. Massive pyritic ore of the José orebody, levels 400 to 500. Published mean: 18.177 / 15.632 / 38.232. | Marcoux (1998), Lead isotope systematics of the giant massive sulphide deposits in the Ib… |
| 18.196 ± 0.023 | 18.172 / 18.22 | 5 | gossan over massive sulfides Mean and standard deviation recalculated from 5 samples, Table 4: gossan of the José orebody. Part of the values drift towards more radiogenic lead, brought in by surface circulation according to the author. | Marcoux (1998), Lead isotope systematics of the giant massive sulphide deposits in the Ib… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.632 ± 0.006 | 15.623 / 15.637 | 4 | massive sulfides (bulk ore or galena separate) Mean and standard deviation recalculated from 4 samples, Table 1. Massive pyritic ore of the José orebody, levels 400 to 500. Published mean: 18.177 / 15.632 / 38.232. | Marcoux (1998), Lead isotope systematics of the giant massive sulphide deposits in the Ib… |
| 15.641 ± 0.021 | 15.619 / 15.666 | 5 | gossan over massive sulfides Mean and standard deviation recalculated from 5 samples, Table 4: gossan of the José orebody. Part of the values drift towards more radiogenic lead, brought in by surface circulation according to the author. | Marcoux (1998), Lead isotope systematics of the giant massive sulphide deposits in the Ib… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 38.232 ± 0.015 | 38.212 / 38.248 | 4 | massive sulfides (bulk ore or galena separate) Mean and standard deviation recalculated from 4 samples, Table 1. Massive pyritic ore of the José orebody, levels 400 to 500. Published mean: 18.177 / 15.632 / 38.232. | Marcoux (1998), Lead isotope systematics of the giant massive sulphide deposits in the Ib… |
| 38.277 ± 0.054 | 38.214 / 38.334 | 5 | gossan over massive sulfides Mean and standard deviation recalculated from 5 samples, Table 4: gossan of the José orebody. Part of the values drift towards more radiogenic lead, brought in by surface circulation according to the author. | Marcoux (1998), Lead isotope systematics of the giant massive sulphide deposits in the Ib… |
Deposits of the same type
- Aljustrel Portugal
- Neves-Corvo Portugal
- Neves-Corvo Portugal
- São Domingos Portugal
- Tharsis Spain
- La Zarza Spain
- Sotiel Spain
- Iberian Pyrite Belt (representative example) Spain/Portugal
Cite this page
IsoFind Atlas (2026). Lousal, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/lousal/ (accessed 2026-10-13).
@misc{isofind2026lousalisotopesignatures,
title = {Lousal, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/lousal/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13