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Titolo:
Isotopic tracing of anthropogenic Pb inventories and sedimentary fluxes inthe Gulf of Lions (NW Mediterranean sea)
Autore:
Ferrand, JL; Hamelin, B; Monaco, A;
Indirizzi:
CEREGE, F-13545 Aix En Provence, France CEREGE Aix En Provence France F-13545 E, F-13545 Aix En Provence, France Univ Perpignan, Sedimentol & Geochim Marines Lab, F-66025 Perpignan, France Univ Perpignan Perpignan France F-66025 s Lab, F-66025 Perpignan, France
Titolo Testata:
CONTINENTAL SHELF RESEARCH
fascicolo: 1, volume: 19, anno: 1999,
pagine: 23 - 47
SICI:
0278-4343(199901)19:1<23:ITOAPI>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
STABLE LEAD ISOTOPES; ATMOSPHERIC LEAD; CONTINENTAL-MARGIN; RIVER; METALS; OCEAN; INDUSTRIAL; POLLUTION; ATLANTIC; POND;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
59
Recensione:
Indirizzi per estratti:
Indirizzo: Hamelin, B CEREGE, BP80, F-13545 Aix En Provence, France CEREGE BP80 Aix En Provence France F-13545 En Provence, France
Citazione:
J.L. Ferrand et al., "Isotopic tracing of anthropogenic Pb inventories and sedimentary fluxes inthe Gulf of Lions (NW Mediterranean sea)", CONT SHELF, 19(1), 1999, pp. 23-47

Abstract

Lead stable isotopes have been analyzed in 24 box-cores (0-50 cm) from various transects across the Gulf of Lions. Lead concentrations (23-85ppm) andisotopic signatures Pb-206/Pb-207 = 1.174 - 1.188) in surficial sediments clearly show the impact of pollutant lead that constitutes 22-80% of the lead accumulated in the first centimeter of these cores. This anthropogenic input is clearly distinct from the natural detrital lead, which comes with more radiogenic signatures (206pb/207pb = 1.195 - 1.233). This makes stable lead measurements a useful complement to (210)pb Or Other radioactive tracers in studies of sedimentology and hydrodynamics in coastal environments. Comparison of riverine and atmospheric deposition with lead accumulated inthe sediment cores indicates that the Rhone particulate input dominates the lead inventories in the continental shelf sediments. The total pollutant lead accumulated in the Gulf of Lions for the past century amounts to 84,000 +/- 18,200 tons. The accumulation of pollutant lead in the surficial sediments is in excess of the riverine and tropospheric input estimated from the literature. This may result from overestimation of pollutant lead accumulation on the continental shelf, due to insufficient sampling in this regionand/or from an additional input from boundary scavenging of lead advected by the Liguro-Provencal current over the shelf. (C) 1998 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 22:24:57