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  4. Thermodynamic investigations of microbial metabolism and abiotic organic synthesis in seafloor hydrothermal systems
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-00102687-10

Thermodynamic investigations of microbial metabolism and abiotic organic synthesis in seafloor hydrothermal systems

Veröffentlichungsdatum
2012-06-27
Autoren
Hentscher, Michael  
Betreuer
Bach, Wolfgang  
Gutachter
Hinrichs, Kai-Uwe  
Zusammenfassung
Hydrothermal circulation of seawater within the oceanic crust creates conditions suitable for chemosynthesis-based microbial life. Synthesis of abiotic organic compounds takes place during seawater-basement rock interaction at elevated temperatures. Low temperature circulation in the recharge zone allows chemolithoautotrophs to gain energy by oxidizing or reduction of minerals, while deeper and hotter regions (reaction zone) are dominated by rock alteration and produce the reduced conditions which are required in abiotic organic synthesis. In this thesis thermodynamic reaction path models have been used to evaluate the potential of abiotic organosynthesis in sub-seafloor environments as well as to determine the Gibbs energy available for metabolic reaction along given mixing paths for hydrothermal fluid and seawater. By merging model results with geochemical field data and microbiological observations it is shown that thermodynamic calculations can be used to enhance our understanding of hydrothermal processes.
Schlagwörter
thermodynamic reaction path model

; 

abiotic organosynthesis

; 

Gibbs energy

; 

chemolithoautotrophs

; 

subseafloor

; 

hydrothermal processes

; 

metabolic reactions
Institution
Universität Bremen  
Fachbereich
Fachbereich 05: Geowissenschaften (FB 05)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

00102687-1.pdf

Size

5.11 MB

Format

Adobe PDF

Checksum

(MD5):7cf1d6485db8473f88cad79ecd649deb

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