Gardon sedimentary archive (flood terrace, GE core)
Gard, Gardon gorges, France
Sediments
- Type
- Sediment
Gardon catchment, a former mining district (Pb-Zn, pyrite, Sb, coal) now industrialised; δ66Zn narrow in sediments, poorly discriminating between mining sources, but sediments of acid-drainage tributaries are lighter (about +0.07 ‰) than the local ore (+0.18 ‰, unpublished) (Resongles et al., 2014). 3 m terrace of flood deposits (layers GE1 to GE20, late 19th century to 2002): homogeneous δ66Zn at the base (GE1 to GE7, +0.26 ± 0.02 ‰, geochemical background) then slightly variable with mining enrichment; 1976 contamination peak (layer GE19) ascribed to a tailings dam failure. Authors' coordinates (SI Table 1).
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.21 ± 0.02 ‰ | 1 | terrace sediment at 12 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 12 cm below the terrace top; -0.08 ‰ against IRMM-3702; layer GE20 (2002). | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.21 ± 0.02 ‰ | 1 | terrace sediment at 20 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 20 cm below the terrace top; -0.08 ‰ against IRMM-3702; layer GE20 (2002). | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 36 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 36 cm below the terrace top; -0.04 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.24 ± 0.02 ‰ | 1 | terrace sediment at 40 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 40 cm below the terrace top; -0.05 ‰ against IRMM-3702; level of the 1976 contamination peak (layer GE19). | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.21 ± 0.02 ‰ | 1 | terrace sediment at 44 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 44 cm below the terrace top; -0.08 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.21 ± 0.02 ‰ | 1 | terrace sediment at 52 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 52 cm below the terrace top; -0.08 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.24 ± 0.02 ‰ | 1 | terrace sediment at 60 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 60 cm below the terrace top; -0.05 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.22 ± 0.02 ‰ | 1 | terrace sediment at 68 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 68 cm below the terrace top; -0.07 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.22 ± 0.02 ‰ | 1 | terrace sediment at 76 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 76 cm below the terrace top; -0.07 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 88 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 88 cm below the terrace top; -0.04 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.22 ± 0.02 ‰ | 1 | terrace sediment at 96 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 96 cm below the terrace top; -0.07 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.2 ± 0.02 ‰ | 1 | terrace sediment at 108 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 108 cm below the terrace top; -0.09 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.23 ± 0.02 ‰ | 1 | terrace sediment at 116 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 116 cm below the terrace top; -0.06 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.26 ± 0.02 ‰ | 1 | terrace sediment at 124 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 124 cm below the terrace top; -0.03 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 132 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 132 cm below the terrace top; -0.04 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.23 ± 0.02 ‰ | 1 | terrace sediment at 136 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 136 cm below the terrace top; -0.06 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.24 ± 0.02 ‰ | 1 | terrace sediment at 148 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 148 cm below the terrace top; -0.05 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.2 ± 0.02 ‰ | 1 | terrace sediment at 160 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 160 cm below the terrace top; -0.09 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.21 ± 0.02 ‰ | 1 | terrace sediment at 172 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 172 cm below the terrace top; -0.08 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.21 ± 0.02 ‰ | 1 | terrace sediment at 180 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 180 cm below the terrace top; -0.08 ‰ against IRMM-3702. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.27 ± 0.02 ‰ | 1 | terrace sediment at 188 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 188 cm below the terrace top; -0.02 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.26 ± 0.02 ‰ | 1 | terrace sediment at 192 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 192 cm below the terrace top; -0.03 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.24 ± 0.02 ‰ | 1 | terrace sediment at 200 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 200 cm below the terrace top; -0.05 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 228 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 228 cm below the terrace top; -0.04 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 236 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 236 cm below the terrace top; -0.04 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 252 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 252 cm below the terrace top; -0.04 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.26 ± 0.02 ‰ | 1 | terrace sediment at 260 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 260 cm below the terrace top; -0.03 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.27 ± 0.02 ‰ | 1 | terrace sediment at 272 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 272 cm below the terrace top; -0.02 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 280 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 280 cm below the terrace top; -0.04 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… | |
| 0.25 ± 0.02 ‰ | 1 | terrace sediment at 304 cm Single analysis; ± 0.02 (1 SD, reproducibility); depth 304 cm below the terrace top; -0.04 ‰ against IRMM-3702; base of the archive (layers GE1 to GE7), geochemical background. | Resongles et al. (2014), Persisting impact of historical mining activity to metal (Pb, Zn… |
Deposits of the same type
- Gardon mining tributary sediments (November 2011) France
- Present-day Gardon sediments (main stream, November 2011) France
- Digonnière peatland (Dig1Ter core) France
- Riou Mort and Riou Viou upstream of the Viviez plant France
- Marcenac reservoir on the Lot (reference) France
- Riou Mort downstream of the Viviez plant France
- Cajarc reservoir on the Lot France
- Ponturin and Arc stream sediments at Peisey-Nancroix France
Cite this page
IsoFind Atlas (2026). Gardon sedimentary archive (flood terrace, GE core), isotope signatures. https://www.isofind.tech/isotopes/en/sites/archive-sedimentaire-du-gardon-terrasse-de-crue-carotte-ge/ (accessed 2026-10-16).
@misc{isofind2026gardonsedimentaryarchiveflood,
title = {Gardon sedimentary archive (flood terrace, GE core), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/archive-sedimentaire-du-gardon-terrasse-de-crue-carotte-ge/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16