Iridium in natural waters

Ariel Anbar, G. J. Wasserburg, D. A. Papanastassiou, P. S. Andersson

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Iridium, commonly used as a tracer of extraterrestrial material, was measured in rivers, oceans, and an estuarine environment. The concentration of iridium in the oceans ranges from 3.0 (± 1.3) x 108 to 5.7 (±0.8) x 108 atoms per kilogram. Rivers contain from 17.4 (± 0.9) x 108 to 92.9 (± 2.2) x 108 atoms per kilogram and supply more dissolved iridium to the oceans than do extraterrestrial sources. In the Baltic Sea, ~75% of riverine iridium is removed from solution. Iron-manganese oxyhydroxides scavenge iridium under oxidizing conditions, but anoxic environments are not a major sink for iridium. The ocean residence time of iridium is between 2 x 103 and 2 x 104 years.

Original languageEnglish (US)
Pages (from-to)1524-1528
Number of pages5
JournalScience
Volume273
Issue number5281
StatePublished - 1996
Externally publishedYes

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iridium
water
ocean
estuarine environment
river
anoxic conditions
residence time
manganese
tracer
iron

ASJC Scopus subject areas

  • General

Cite this

Anbar, A., Wasserburg, G. J., Papanastassiou, D. A., & Andersson, P. S. (1996). Iridium in natural waters. Science, 273(5281), 1524-1528.

Iridium in natural waters. / Anbar, Ariel; Wasserburg, G. J.; Papanastassiou, D. A.; Andersson, P. S.

In: Science, Vol. 273, No. 5281, 1996, p. 1524-1528.

Research output: Contribution to journalArticle

Anbar, A, Wasserburg, GJ, Papanastassiou, DA & Andersson, PS 1996, 'Iridium in natural waters', Science, vol. 273, no. 5281, pp. 1524-1528.
Anbar A, Wasserburg GJ, Papanastassiou DA, Andersson PS. Iridium in natural waters. Science. 1996;273(5281):1524-1528.
Anbar, Ariel ; Wasserburg, G. J. ; Papanastassiou, D. A. ; Andersson, P. S. / Iridium in natural waters. In: Science. 1996 ; Vol. 273, No. 5281. pp. 1524-1528.
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