doi: 10.1126/science.1096033.
Epub 2004 Apr 1.
Hydrocarbons in hydrothermal vent fluids: the role of chromium-bearing catalysts
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- PMID: 15060286
- DOI: 10.1126/science.1096033
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Hydrocarbons in hydrothermal vent fluids: the role of chromium-bearing catalysts
Science.
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Abstract
Fischer-Tropsch type (FTT) synthesis has long been proposed to account for the existence of hydrocarbons in hydrothermal fluids. We show that iron- and chromium-bearing minerals catalyze the abiotic formation of hydrocarbons. In addition to production of methane (CH4aq), we report abiotic generation of ethane (C2H6aq) and propane (C3H8aq) by mineral-catalyzed hydrothermal reactions at 390 degrees C and 400 bars. Results suggest that the chromium component in ultramafic rocks could be an important factor for FTT synthesis during water-rock interaction in mid-ocean ridge hydrothermal systems. This in turn could help to support microbial communities now recognized in the subsurface at deep-sea vents.
Comment in
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Geochemistry. Life's chemical kitchen.Science. 2004 May 14;304(5673):972-3. doi: 10.1126/science.1098112. Science. 2004. PMID: 15143267 No abstract available.
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