Ferrari C.P., Clotteau T., Thompson L.G., Barbante C., Cozzi G., Cescon P., Hong S., Maurice Laurence, Francou Bernard, Boutron C.F. (2001). Heavy metals in ancient tropical ice : initial results. Atmospheric Environment, 35 (33), p. 5809-5815. ISSN 1352-2310.
Titre du document
Heavy metals in ancient tropical ice : initial results
Année de publication
2001
Auteurs
Ferrari C.P., Clotteau T., Thompson L.G., Barbante C., Cozzi G., Cescon P., Hong S., Maurice Laurence, Francou Bernard, Boutron C.F.
Source
Atmospheric Environment, 2001,
35 (33), p. 5809-5815 ISSN 1352-2310
Although a wealth of fascinating data have been obtained through the investigation of heavy metals in Greenland, Antarctic and Alpine snow and ice cores, heavy metals have until now never been measured in tropical snow and ice cores despite the great interest of such low latitude cores. We present here preliminary data on the occurrence of Al, Na, Ti, V, Cr, Mn, Co, Cu, Zn, Mo, Pd, Ag, Cd, Sb, Ba, Pt, Au, Pb, Bi and U in a dated ice core drilled at an altitude of 6542 m on the top of Sajama in Bolivia. These data were obtained by analysing four core sections dated 22,000 BP (Last Glacial Maximum, LGM), 8000 BP (early Holocene, EH), AD1650 and AD 1897, using ultrasensitive ICP-SF-MS. Concentrations observed in LGM ice are similar to those measured in EH ice. Al, Na, Ti, V, Cr, Mn, Co, Ba and U are found to derive mainly from rock and soil dust. For the other metals, additional contributions from other sources are needed to explain the observed concentrations.
Plan de classement
Pollution continentale [038POLCON]
;
Sédimentologie [064SEDIM]
Descripteurs
METAL LOURD ; AEROSOL ; SEDIMENTATION GLACIAIRE ; GLACIER ; HOLOCENE ; MESURE AU SOL ; DONNEES DE TERRAIN ; FACTEUR ANTHROPIQUE ; POLLUTION ; CAROTTAGE ; ROCHE ; POUSSIERE
Description Géographique
BOLIVIE ; ZONE TROPICALE
Localisation
Fonds IRD [F B010065150]
Identifiant IRD
fdi:010065150
