Riou Mort and Riou Viou upstream of the Viviez plant
Riou Mort basin and Lot valley, Aveyron and Lot, France
Sediments
- Type
- Sediment
The Viviez zinc ore processing plant (Vieille Montagne then Umicore) refined up to 100,000 t of zinc per year (1985) by electrolysis and thermal processing; its tailings, very heavy in zinc, polluted the Riou Mort and then the Lot until extraction stopped in 1987. Sediments upstream of the industrial site, zinc from 108 to 180 mg/kg. Indicative coordinates.
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.34 ± 0.03 ‰ | 0.32 / 0.36 ‰ | 2 | Mean and standard deviation recalculated from 2 samples, Table 1. Like the regional geochemical background. | Sivry et al. (2008), Zn isotopes as tracers of anthropogenic pollution from Zn-ore smelte… |
Deposits of the same type
- Riou Mort downstream of the Viviez plant France
- Marcenac reservoir on the Lot (reference) France
- Cajarc reservoir on the Lot France
- Digonnière peatland (Dig1Ter core) France
- Scheldt estuary Netherlands
- Natural Qaamarujuk fjord sediments (pre-mining) Greenland
- Keqikaer Glacier cryoconite China
- Paraíba do Sul and Guandu rivers Brazil
Cite this page
IsoFind Atlas (2026). Riou Mort and Riou Viou upstream of the Viviez plant, isotope signatures. https://www.isofind.tech/isotopes/en/sites/riou-mort-et-riou-viou-en-amont-de-l-usine-de-viviez/ (accessed 2026-10-13).
@misc{isofind2026rioumortandriouviouupstreamof,
title = {Riou Mort and Riou Viou upstream of the Viviez plant, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/riou-mort-et-riou-viou-en-amont-de-l-usine-de-viviez/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13