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Session B16 Description AGU 05, December 6-7th, 2005. Organic compounds are ubiquitous in volcanic hydrothermal systems on Earth, and are subject to a variety of both abiogenic and biogenic processes. Abiogenic syntheses and alteration proceed over a wide range of conditions, including in volcanic gases and fluids (350-1100°C) and in moderate to elevated temperature aqueous fluids (100-300°C approximately). Biogenic processes, such as those resulting from hyperthermophilic communities of organisms, also produce or alter organic compounds and operate under comparable range of environments, including high temperatures, pressures, pH, and salinity. Much remains unknown regarding the origin, reaction pathways, sinks, and decomposition of organic compounds in volcanic hydrothermal systems, whether due to biogenic or abiogenic processes. Recent years have seen increasing contributions from the different perspectives of field observations and analysis, experimental laboratory studies on organic compounds, field and laboratory microbiology, and theoretical approaches. Overlapping disciplines are diverse and include areas such as volcanology, analytical and experimental geochemistry, atmospheric chemistry, physical chemistry; biochemistry, microbiology, astrobiology, and "origin of life" research. We welcome contributions which focus on the organic chemistry of volcanic hydrothermal systems using field, experimental and theoretical approaches. Particularly sought are contributions which are able to relate one or more of these approaches, or are cross-disciplinary. Click here for the list of invited presenters |
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