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Géochimie élémentaire et isotopique du Zn, du Sr et du Pb dans les gaz volcaniques. Méthodologies d'échantillonnage et apports à la compréhension des interactions fluides/solides.

Abstract : This manuscript presents the first results concerning the study of Zn, Sr, and Pb elementary and isotopic variations in samples linked to volcanic exhalations (gas, sublimates, thermal waters, rocks), together with two new volcanic gas and plumes sampling methodologies. Zn isotopic variations observed at Merapi suggests that phase changing processes (fluid/solid) might generate significant isotopic fractionation of metallic trace elements. The coupled Sr/Pb isotopic study performed at Vulcano shows that both natural and anthropogenic sources might influence the trace metal compositions of fumaroles and thermal waters. This work also describes new methods for sampling and analyzing volcanic gases and plumes, allowing a complete characterization of these volcanic exhalations with simple and efficient methods.
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Submitted on : Wednesday, March 15, 2006 - 4:02:34 PM
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Anthony Nonell. Géochimie élémentaire et isotopique du Zn, du Sr et du Pb dans les gaz volcaniques. Méthodologies d'échantillonnage et apports à la compréhension des interactions fluides/solides.. Géochimie. Université Paul Sabatier - Toulouse III, 2005. Français. ⟨tel-00011689⟩

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