Lever, Mark A; Heuer, Verena B; Morono, Yuki; Masui, Noriaki; Schmidt, Frauke; Alperin, Marc J; Inagaki, Fumio; Hinrichs, Kai-Uwe; Teske, Andreas P (2010): Methane concentration and porewater acetate of sediment cores from the IODP Expedition 301 Site U1301 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.737451
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Abstract:
In deep subsurface sediments of the Juan de Fuca Ridge Flank, porewater acetate that is depleted in 13C relative to sedimentary organic matter indicates an acetogenic component to total acetate production. Thermodynamic calculations indicate common fermentation products or lignin monomers as potential substrates for acetogenesis. The classic autotrophic reaction may contribute as well, provided that dihydrogen (H2) concentrations are not drawn down to the thermodynamic thresholds of the energetically more favorable processes of sulfate reduction and methanogenesis. A high diversity of novel formyl tetrahydrofolate synthetase (fhs) genes throughout the upper half of the sediment column indicates the genetic potential for acetogenesis. Our results suggest that a substantial fraction of the acetate produced in marine sediment porewaters may derive from acetogenesis, in addition to the conventionally invoked sources fermentation and sulfate reduction.
Related to:
Lever, Mark A; Heuer, Verena B; Morono, Yuki; Masui, Noriaki; Schmidt, Frauke; Alperin, Marc J; Inagaki, Fumio; Hinrichs, Kai-Uwe; Teske, Andreas P (2010): Acetogenesis in deep subseafloor sediemnts of the Juan de Fuca Ridge flank: A synthesis of geochemical, thermodynamic, and gene-based evidence. Geomicrobiology Journal, 27(2), 183-211, https://doi.org/10.1080/01490450903456681
Project(s):
Coverage:
Median Latitude: 47.754630 * Median Longitude: -127.763165 * South-bound Latitude: 47.754600 * West-bound Longitude: -127.763330 * North-bound Latitude: 47.754660 * East-bound Longitude: -127.763000
Event(s):
301-U1301C * Latitude: 47.754660 * Longitude: -127.763330 * Elevation: -2656.0 m * Recovery: 143.36 m * Location: Juan de Fuca Ridge, North Pacific Ocean * Campaign: Exp301 (Juan de Fuca Hydrogeology) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 166.8 m cored; 85.9 % recovered; 98.5 m drilled; 265.3 m penetrated
301-U1301D * Latitude: 47.754600 * Longitude: -127.763000 * Recovery: 42.12 m * Location: Juan de Fuca Ridge, North Pacific Ocean * Campaign: Exp301 (Juan de Fuca Hydrogeology) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 57 m cored; 73.9 % recovered; 120 m drilled; 177 m penetrated
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Lever, MA; Heuer, VB; Morono, Y et al. (2010): Methane concentrations and carbon isotopic compositions of methane in sediment cores from IODP Expedition 301 Site U1301. https://doi.org/10.1594/PANGAEA.737448
- Lever, MA; Heuer, VB; Morono, Y et al. (2010): Porewater acetate concentrations of sediment cores from IODP Expedition 301 Site U1301. https://doi.org/10.1594/PANGAEA.737450