14C-AMS as a tool for the investigation of mercury deposition at a remote Amazon location

J. A. Barbosa, R. C. Cordeiro, E. V. Silva, B. Turcq, P. R.S. Gomes, G. M. Santos, A. Sifedinne, A. L.S. Albuquerque, L. D. Lacerda, P. A. Hausladen, S. G. Tims, V. A. Levchenko, L. K. Fifield

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We present results of the atmospheric mercury deposition rate in the Amazon region during the last 43000 years. Lake sediment samples were collected from the Lagoa da Pata, a small and remote lake in northern Brazilian Amazon. The samples were divided in sub-samples, for C, Hg, N and 14C-AMS analyses. Three main paleoclimatic events could be identified. The mercury accumulation rates were found to be larger during the periods of the Holocene and Pleistocene associated with high temperatures and frequency of forest fires.

Original languageEnglish
Pages (from-to)528-534
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume223-224
Issue numberSPEC. ISS.
DOIs
StatePublished - Aug 2004
Externally publishedYes

Funding

The Brazilian authors would like to thank the Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico (CNPq) for their financial support. They also thank IBAMA and Força Aérea Brasileira (CAN) for logistical support and transport during the field work at Morro dos Seis Lagos.

Keywords

  • AMS dating
  • Amazon
  • Climate
  • Mercury

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