Marine radiocarbon reservoir effect of coastal waters off Cape Verde archipelago

Monge Soares, Antonio M.; Matos Martins, Jose M.; Cardoso, João Luis

http://hdl.handle.net/10400.1/12076

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Autores

Monge Soares, Antonio M.

Matos Martins, Jose M.

Cardoso, João Luis

Resumo(s)

Quantification of the marine radiocarbon reservoir effect (Delta R) is essential in order to calibrate conventional C-14 dates from marine shell samples with reliability. Delta R also provides information concerning the intensity of coastal upwelling in marine regions influenced by this phenomenon. C-14 ages of closely associated marine samples (mollusk shells) and terrestrial samples (goat bones) from Sao Vicente Island, Cape Verde Archipelago, permitted the first calculation of the marine C-14 reservoir effect in this region. A Delta R weighted mean value of 70 +/- 70 C-14 yr was obtained. This value is in accordance with the previously published oceanographic conditions of the region indicating the existence of a seasonal active upwelling regime.

Palavras-chave

Sw spain observations North-Atlantic Frontal zone Temporal fluctuations Geomorphic model Age calibration Chenier plain California Holocene Variability