Seasonal and spatial variations of silicon isotopes in large tropical rivers Hughes H., Cardinal D., Sondag F., Cocquyt Ch., Bouillon S., Borges A.V., Pandi A. & André L. Third scientific meeting of the Hybam Observatory on Amazonian Rivers, Tabatinga (Brazil) & Leticia (Colombia), 20‐23th October 2009
11
Embed
Seasonal and spatial variations of silicon isotopes in ... · Seasonal and spatial variations of silicon isotopes in large tropical rivers Hughes H., Cardinal D., Sondag F., Cocquyt
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Seasonal and spatial variations of silicon isotopes in large tropical
rivers
Hughes H., Cardinal D., Sondag F., Cocquyt Ch.,Bouillon S., Borges A.V., Pandi A. & André L.
Third scientific meeting of the Hybam Observatory on Amazonian Rivers, Tabatinga (Brazil) & Leticia (Colombia), 20‐23th October 2009
Silicon
• Si = 28.8 wt % in the Earth’s crust
• Continental fluxes are still poorly constrained
• Si isotopes should help to provide a constraint on the origine and mass budget of riverine dissolved Si
Continental Si cycle
Modified from Meunier et al., 2001
Silicate rocks + CO2 + water Clay minerals + dissolved Si