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Inicio  /  Andean Geology  /  Vol: 28 Núm: 1 Par: 0 (2001)  /  Artículo
ARTÍCULO
TITULO

Anthropogenic isotope (210Pb, 137Cs) variations in the sedimentary record from a lake in the Nahuelbuta mountain range, Chile.

Marco Cisternas    
Alberto Araneda    

Resumen

The activity and distribution of 210Pb and 137Cs through the sedimentary record of a lake, which is located in the Nahuelbuta mountain range, are influenced by anthropic activity. Isotope analyses, X-rays, magnetic susceptibility, pollen and grain size analyses show both erosion rates variations-produced by land use changes within the watershed-and the 137Cs atmospheric inputs have affected on the behavior of those isotopes in the record. The role of some natural variables -as the low ratio of land to ocean in southern latitudes, and the Nahuelbuta mountain range locations are also discussed.

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