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http://hdl.handle.net/2122/10445
Authors: | Zuddas, P.* Inguaggiato, C.* Censi, P.* D'Alessandro, W.* |
Title: | Zr- Hf fractionation during Water-Rock Interaction | Editors: | Marques, J.M. Chambel, A. |
Issue Date: | 16-Oct-2016 | Publisher: | Elsevier - Procedia Earth and Planetary Science vol. 17 | URL: | http://www.sciencedirect.com/science/article/pii/S1878522016302132 | DOI: | 10.1016/j.proeps.2016.12.179 | Keywords: | Zr/Hf ratio natural waters |
Subject Classification: | 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters 03. Hydrosphere::03.04. Chemical and biological::03.04.06. Hydrothermal systems |
Abstract: | Zr and Hf are two elements having same ionic charge and similar ionic size at a given coordination number. Despite the Zr/Hf ratio is considered to be quite constant in meteorites and lithospheric rocks, seawaters collected from the surface down to varying depths of several Pacific Ocean stations reveal that the Zr/Hf ratio increases by one order of magnitude. Very recent studies have shown that, in both ground waters and lake waters, the Zr/Hf ratio is either higher or lower compared to the interacting minerals displaying a large variability in the distribution of these twin elements. In this communication the possible processes responsible for such a large fractionation are discussed but further work is needed to test the validity of these interpretations. This basic problem of scientific significance needs more attention from the water-rock interaction community. |
Appears in Collections: | Conference materials |
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File | Description | Size | Format | |
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ProcediaEPS.Zuddas&al.pdf | main article | 183.31 kB | Adobe PDF | View/Open |
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