Department of Soil Science, The Hebrew University of Jerusalem, Rehovot, Israel.
Incorporation of uranium in modern corals
Version of Record online: 14 JUN 2006
Volume 20, Issue 4, pages 523–528, November 1973
How to Cite
AMIEL, A. J., MILLER, D. S. and FRIEDMAN, G. M. (1973), Incorporation of uranium in modern corals. Sedimentology, 20: 523–528. doi: 10.1111/j.1365-3091.1973.tb01629.x
- Issue online: 14 JUN 2006
- Version of Record online: 14 JUN 2006
- Manuscript received 29 November 1972
Uranium occurs in corals at three sites: 1, in organic matter; 2, adsorbed on the surfaces of skeletal aragonite; and 3, in the aragonite lattice. Organic matter incorporates from sea water by chelation 40–70 ppm uranium; skeletal aragonite incorporates only 3 ppm. However, as the organic fraction is low (0·1%), its high concentration of uranium does not significantly affect the total concentration of uranium in the coral. A negligible concentration of uranium, 40–60 ppb, is adsorbed on skeletal aragonite from which it is readily leached or exchanged. This low concentration of adsorbed uranium (<2% of the total uranium in skeletal aragonite) is related to the very small specific surface area (1·5–1·8 m2/g of the corals.