Five thousand years of atmospheric Ni, Zn, As, and Cd deposition recorded in bogs from NW Iberia: prehistoric and historic anthropogenic contributions

X. Pontevedra-Pombal, T. M. Mighall, J.C. Nóvoa-Muñoz, E. Peiteado-Varela, J. Rodríguez-Racedo, E. García-Rodeja, A. Martínez-Cortizas

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Abstract

The analysis of environmental archives from across the world has demonstrated that human perturbation of the geochemical cycles of trace metals and the resultant atmospheric metal contamination date back, at least, several millennia. However, an understanding of the local processes and timing of changes in trace metal deposition is also essential for a proper global interpretation. The Iberian Peninsula was a major mining area since prehistoric times and the analysis of environmental archives provides a good opportunity to improve our understanding of the history of mining and metallurgy in Europe. We present the results from three 14C dated peat cores from the Xistral Mountains (NW Iberia). These records are used to reconstruct past atmospheric deposition of Ni, Zn, As, and Cd. The chronology of the changes in concentrations and metal accumulation rates was found to be concordant in the three bogs, and showed great similarity to total Pb, Hg, and Pb isotope ratios as determined in previous investigations. They present a consistent view of changes in atmospheric pollution and the importance of metals in the development of human societies, especially: i) the first evidence of atmospheric metal pollution 3400 years ago, which is simultaneous with the expansion of the Atlantic Bronze Koine; ii) a pollution event between 2350 and 2150 years ago, associated to the development of so-called Celtic culture (local Late Iron Age); iii) a dramatic increase of metal fluxes in Roman times; iv) a severe and rapid increase in the last 250 years corresponding to the beginning of the industrial revolution in Europe, reflecting the emergence of the new dominant sources of pollution, and v) the increase of long range atmospheric transport of pollutants. Our data suggest that all detected ancient (until ca. 1450 cal BP) periods of enhanced Ni, Zn, As, and Cd accumulation may have had an anthropogenic origin, related to the onset and development of mining and metallurgy.
Original languageEnglish
Pages (from-to)764-777
Number of pages14
JournalJournal of Archaeological Science
Volume40
Issue number1
Early online date23 Jul 2012
DOIs
Publication statusPublished - Jan 2013

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industrial revolution
pollutant
environmental pollution
interpretation
event
history
society
evidence
Historic
Iberia
Metals
Deposition
time
Pollution
Metallurgy
Industrial Revolution
Chronology
History
Pb Isotopes
Onset

Keywords

  • atmospheric deposition
  • Palaeo-pollution
  • Mid-late holocene
  • NW Iberia
  • anthropogenic sources

Cite this

Pontevedra-Pombal, X., Mighall, T. M., Nóvoa-Muñoz, J. C., Peiteado-Varela, E., Rodríguez-Racedo, J., García-Rodeja, E., & Martínez-Cortizas, A. (2013). Five thousand years of atmospheric Ni, Zn, As, and Cd deposition recorded in bogs from NW Iberia: prehistoric and historic anthropogenic contributions. Journal of Archaeological Science, 40(1), 764-777. https://doi.org/10.1016/j.jas.2012.07.010

Five thousand years of atmospheric Ni, Zn, As, and Cd deposition recorded in bogs from NW Iberia : prehistoric and historic anthropogenic contributions. / Pontevedra-Pombal, X.; Mighall, T. M.; Nóvoa-Muñoz, J.C.; Peiteado-Varela, E.; Rodríguez-Racedo, J.; García-Rodeja, E.; Martínez-Cortizas, A.

In: Journal of Archaeological Science, Vol. 40, No. 1, 01.2013, p. 764-777.

Research output: Contribution to journalArticle

Pontevedra-Pombal, X, Mighall, TM, Nóvoa-Muñoz, JC, Peiteado-Varela, E, Rodríguez-Racedo, J, García-Rodeja, E & Martínez-Cortizas, A 2013, 'Five thousand years of atmospheric Ni, Zn, As, and Cd deposition recorded in bogs from NW Iberia: prehistoric and historic anthropogenic contributions', Journal of Archaeological Science, vol. 40, no. 1, pp. 764-777. https://doi.org/10.1016/j.jas.2012.07.010
Pontevedra-Pombal, X. ; Mighall, T. M. ; Nóvoa-Muñoz, J.C. ; Peiteado-Varela, E. ; Rodríguez-Racedo, J. ; García-Rodeja, E. ; Martínez-Cortizas, A. / Five thousand years of atmospheric Ni, Zn, As, and Cd deposition recorded in bogs from NW Iberia : prehistoric and historic anthropogenic contributions. In: Journal of Archaeological Science. 2013 ; Vol. 40, No. 1. pp. 764-777.
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