Black Rivers of the Congo central basin (Likouala, Motaba, Alima)
Congo central basin, République du Congo
Rivers and surface water
- Type
- River or surface water
Small right-bank tributaries flowing through wetlands, acidic, poor in suspended matter and very rich in dissolved organic carbon. They supply about 22 ± 10 % of the Congo discharge at their confluence. Indicative coordinates (centre of the basin).
δ30Si in ‰ (per mil) Values of the same system
Standard : NBS 28
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.01 ± 0.15 ‰ | −0.14 / 0.16 ‰ | 3 | filtered river water (dissolved silicon) Mean and standard deviation recalculated from the three rivers: Likouala -0.14 ± 0.06 ‰ (pH 4.65, November 1989), Motaba +0.02 ± 0.09 ‰ (November 1988), Alima +0.16 ± 0.18 ‰ (pH 4.98, November 1989, n = 4). The lightest dissolved silicon measured in running waters. The authors attribute it to the dissolution of phytoliths and light clays promoted by organic matter. | Cardinal et al. (2010), Contrasting silicon isotope signatures in rivers from the Congo B… |
Deposits of the same type
- Sangha République du Congo
- Lobaye République centrafricaine
- Kasai République démocratique du Congo
- Congo River (Brazzaville) République du Congo
- Nile Égypte
- El Sancho reservoir Spain
- Meca River, point B Spain
- Meca River, point A3 Spain
Cite this page
IsoFind Atlas (2026). Black Rivers of the Congo central basin (Likouala, Motaba, Alima), isotope signatures. https://www.isofind.tech/isotopes/en/sites/rivieres-noires-de-la-cuvette-congolaise-likouala-motaba-alima/ (accessed 2026-10-13).
@misc{isofind2026blackriversofthecongocentralb,
title = {Black Rivers of the Congo central basin (Likouala, Motaba, Alima), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/rivieres-noires-de-la-cuvette-congolaise-likouala-motaba-alima/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13