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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 1, No. 3, 2004, pp. 191-198
Bioline Code: st04023
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 1, No. 3, 2004, pp. 191-198

 en Geochemistry of heavy metals and sedimentation rate in a bay adjacent to the Caspian Sea
A. R. Karbassi and R. Amirnezhad

Abstract

In the present investigation down core variations of heavy metals such as; Zn, Ni, Co, Mn, Fe and Al in a sediment core from Bay of Gorgan adjacent to the Caspian Sea was studied. Inter-relationship amongst various parameters was brought out through correlation coefficients and cluster analysis. The results of present study reveals that Zn, Ni, Co and Mn possess both lithogenous and non-lithogenous sources. The increasing trend of Al towards top of sediment core is indicative higher erosion in the recent years. Interestingly, concentration of all studied metals increases toward core top (except for Fe) that might be indicative of influence of man's activities residing in catchment area of Gorgan Bay and also oil exploration in the Caspian Sea. Further, 210Pb and 137Cs techniques were used to find out rate of sedimentation. The result of dating is indicative of sedimentation rate between 1.4 to 2.45 mm/yr. based on 210Pb and 137Cs activities respectively.

Keywords
Heavy metals, 210Pb, 137Cs, core, sediment, Gorgan bay, Caspian Sea

 
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