Spiekeroog beach, subterranean estuary (stations 0 to 5)
Lower Saxony, Germany
Groundwater
- Type
- Groundwater
Spiekeroog Island (East Frisian Islands, North Sea). 350 m transect on the north-west beach, from the dune (station 0) to the intertidal zone (station 5); coordinates of station 0. Mixing of lens freshwater and recirculated seawater; silicon flux to the sea estimated at 210 mol/yr per metre of coastline.
δ30Si in ‰ (per mil) Values of the same system
Standard : NBS 28
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.07 ± 0.51 ‰ | 0.25 / 2.21 ‰ | 19 | beach pore water Mean and standard deviation recalculated from 19 samples. Stations 0 (4), 1 (4), 2 (2), 3 (4), 4 (4) and 5 (1), 50 to 520 cm below the surface; dissolved silicon 40 to 192 µM. δ30Si decreases with depth at each station: dissolution of light lithogenic silica, very little authigenic silica formation. | Ehlert et al. (2016), Transformation of silicon in a sandy beach ecosystem: Insights from… |
| 1.14 ‰ | 1 | tidal channel water Tidal channel, 55 µM. | Ehlert et al. (2016), Transformation of silicon in a sandy beach ecosystem: Insights from… | |
| 3.04 ‰ | 1 | coastal seawater Coastal seawater, 3 µM silicon, ± 0.25 ‰ (2σ): strongly depleted by diatoms. | Ehlert et al. (2016), Transformation of silicon in a sandy beach ecosystem: Insights from… |
Deposits of the same type
- Spiekeroog freshwater lens, well 30 Germany
- Spiekeroog freshwater lens, well 27 Germany
- Coal-mine tip, site 2 (confined chalk aquifer) France
- Coal-mine tip, site 1 (unconfined chalk aquifer) France
- Viviez tailings percolating waters France
- Ayagh Bolaghi spring (Zarshuran mine) Iran
- Takht-e Soleiman and Ahmadabad hot springs Iran
- Cold springs of the Angouran area Iran
Cite this page
IsoFind Atlas (2026). Spiekeroog beach, subterranean estuary (stations 0 to 5), isotope signatures. https://www.isofind.tech/isotopes/en/sites/plage-de-spiekeroog-estuaire-souterrain-stations-0-a-5/ (accessed 2026-10-13).
@misc{isofind2026spiekeroogbeachsubterraneanes,
title = {Spiekeroog beach, subterranean estuary (stations 0 to 5), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/plage-de-spiekeroog-estuaire-souterrain-stations-0-a-5/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13