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Titre du document / Document title

Lead from Carthaginian and Roman Spanish mines isotopically identified in Greenland ice dated from 600 B.C. to 300 A.D.

Auteur(s) / Author(s)

ROSMAN K. J. R. (1) ; CHISHOLM W. (1) ; HONG S. (2) ; CANDELONE J.-P. (2) ; BOUTRON C. F. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Applied Physics, Curtin University of Technology, GPO Box U 1987, Perth, WA 6845, AUSTRALIE
(2) Laboratoire de Glaciologie et Géophysique de l'Environment du CNRS, 54 rue Molière, Domaine Universitaire, BP 96, 38402 St Martin d'Hères, FRANCE

Résumé / Abstract

The pollution history of the atmosphere of the Northern Hemisphere is recorded in the levels of heavy metal impurities in Greenland ice. The possibility also exists of using natural variations in the abundances of lead isotopes to trace the source of this pollution. Lead isotopes have now been measured in ancient Greenland ice with a lead concentration as low as 0.9 pg/g. The results show a depression in the 206Pb/207Pb ratio between 600 B.C. and 300 A.D., giving unequivocal evidence of early large-scale atmospheric pollution by this toxic metal. This ratio changes from ∼1.201 in ∼8-kyr-old ice to ∼1.183 about 2 kyr ago. Isotopic systematics point to the mining districts in southwest and southeast Spain as the dominant sources of this lead, giving quantitative evidence of the importance of these mining districts to the Carthaginian and Roman civilizations. Lead with a Rio Tinto-type signature represents ∼70% of the lead found in Greenland ice between ∼150 B.C. and 50 A.D. after correcting for the contribution from rock dust indexed to aluminium concentrations.

Revue / Journal Title

Environmental science & technology    ISSN  0013-936X   CODEN ESTHAG 

Source / Source

1997, vol. 31, no12, pp. 3413-3416 (26 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Chemical Society, Washington, DC, ETATS-UNIS  (1967) (Revue)

Mots-clés anglais / English Keywords

Air pollution

;

Northern Hemisphere

;

Case history

;

Greenland

;

Snow

;

Ice

;

Heavy metal

;

Lead Isotopes

;

Radioisotope

;

Isotopic composition

;

Content

;

Pollution source inventory

;

Long range pollutant transport

;

North America

;

America

;

Mots-clés français / French Keywords

Pollution air

;

Hémisphère Nord

;

Historique

;

Groenland

;

Neige

;

Glace

;

Métal lourd

;

Plomb Isotope

;

Radioisotope

;

Composition isotopique

;

Teneur

;

Inventaire source pollution

;

Transport polluant grande distance

;

Amérique du Nord

;

Amérique

;

Mots-clés espagnols / Spanish Keywords

Contaminación aire

;

Hemisferio norte

;

Histórica

;

Groenlandia

;

Nieve

;

Hielo

;

Metal pesado

;

Plomo Isótopo

;

Radionúclido

;

Composición isotópica

;

Proporción

;

Inventario fuente polución

;

Transporte contaminante gran distancia

;

America del norte

;

America

;

Localisation / Location

INIST-CNRS, Cote INIST : 13615, 35400007964472.0150

Nº notice refdoc (ud4) : 2099549



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