Riou Mort downstream 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 near the plant (V1) and further downstream (E); zinc from 1009 to 6687 mg/kg. Indicative coordinates.
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.72 ± 0.27 ‰ | 0.53 / 0.91 ‰ | 2 | Mean and standard deviation recalculated from 2 samples, Table 1. V1 at 0.91 ‰, present-day pollution signature. | Sivry et al. (2008), Zn isotopes as tracers of anthropogenic pollution from Zn-ore smelte… |
Deposits of the same type
- Riou Mort and Riou Viou upstream 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 downstream of the Viviez plant, isotope signatures. https://www.isofind.tech/isotopes/en/sites/riou-mort-en-aval-de-l-usine-de-viviez/ (accessed 2026-10-13).
@misc{isofind2026rioumortdownstreamoftheviviez,
title = {Riou Mort downstream of the Viviez plant, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/riou-mort-en-aval-de-l-usine-de-viviez/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13