Assinatura da deposição atmosférica de testes nucleares em sedimentos da costa brasileira (240+239Pu e 137Cs)

Química Nova

Christian J. Sanders¹  Sambasiva R. Patchineelam¹  Wilson Machado¹  Ana Luiza S. Albuquerque¹  Emmanoel V. Silva-filho¹  Pedro P. Caldeira²  Luciana M. Sanders² 

[1] ,Universidade Federal Fluminense Departamento de Geoquímica Niterói RJ ,Brasil

关键词: 137Cs;    240+239Pu;    geochronology;   

DOI  :  10.1590/S0100-40422012000600026

来源: SciELO

【 摘 要 】

The aim of this review is to take a look at Cold War era nuclear tests signatures found in Brazilian coastal sediments. Both137Cs and 240+239Pu signatures have been documented in mangrove, coastal mudflats and continental shelf sediments, associated with above ground nuclear tests beginning in the 1950's. The dates associated to the anthropogenic radionuclide signatures 137Cs and 240+239Pu along sediment columns are confirmed by 210Pb geochronology in many of the studies highlighted in this review. The results outlined in this review characterize the extent to which nuclear fallout products reach the Brazilian coast in quantities sufficient for detection, allowing the use of these radioisotopes as geochronometers.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License