Coal-mine tip, site 1 (unconfined chalk aquifer)
Nord-Pas-de-Calais coal basin, about 30 km south of Lille, France
Groundwater
- Type
- Groundwater
Coal-mine tip resting directly on Senonian-Turonian chalk. Oxidation of pyrite in the shales enriches the aquifer in sulfate, but the acid drainage is buffered by the chalk.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −1.1 ± 0.3 ‰ | dissolved sulfate, chalk aquifer Upstream piezometer SHPZ2. | Denimal et al. (2002), Leaching of coal-mine tips (Nord-Pas-de-Calais coal basin, France)… | ||
| −3.1 ± 0.3 ‰ | dissolved sulfate, chalk aquifer Upstream piezometer SHPZ2BIS. | Denimal et al. (2002), Leaching of coal-mine tips (Nord-Pas-de-Calais coal basin, France)… | ||
| −3.9 ± 0.3 ‰ | dissolved sulfate, chalk aquifer Downstream piezometer SHPZ1. | Denimal et al. (2002), Leaching of coal-mine tips (Nord-Pas-de-Calais coal basin, France)… | ||
| −2.8 ± 0.3 ‰ | dissolved sulfate, chalk aquifer Downstream piezometer SHS3. | Denimal et al. (2002), Leaching of coal-mine tips (Nord-Pas-de-Calais coal basin, France)… | ||
| 6.1 ± 0.3 ‰ | dissolved sulfate, chalk aquifer Downstream piezometer SHS4. | Denimal et al. (2002), Leaching of coal-mine tips (Nord-Pas-de-Calais coal basin, France)… |
Deposits of the same type
- Coal-mine tip, site 2 (confined chalk aquifer) France
- Vinto drinking water (DW1 to DW3) Bolivia
- Pebble deposit seeps United States
Cite this page
IsoFind Atlas (2026). Coal-mine tip, site 1 (unconfined chalk aquifer), isotope signatures. https://www.isofind.tech/isotopes/en/sites/terril-site-1-nappe-libre-de-la-craie/ (accessed 2026-10-06).
@misc{isofind2026coalminetipsite1unconfinedcha,
title = {Coal-mine tip, site 1 (unconfined chalk aquifer), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/terril-site-1-nappe-libre-de-la-craie/},
note = {Accessed 2026-10-06}
}Updated : 2026-10-06