TY - GEN AU - Allard,Patrick TI - The origin of hydrogen, carbon, sulphur, nitrogen an rare gases in volcanic exhalations: evidence from isotope geochemistry T2 - Developments in volcanology, 1 SN - 0444422412 KW - Géochimie KW - Gaz volcanique KW - Hydrogène KW - Carbone KW - Sulfure KW - Azote KW - Gaz rare ER -