Quantification of co-occurring reaction rates in deep subseafloor sediments

Wang, Guizhi; Spivack, Arthur J.; Rutherford, Scott; Manor, Uri; Dhondt, Steven

doi:10.1016/j.gca.2008.04.024

Cited by 62 publications

(76 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Relatively rapid basement fluid flow rates, slow metabolic rates and rapid sampling/processing could explain the simultaneous presence of sulfate and methane in the basement fluids. Concurrence of sulfate reduction and methanogenesis (methane production) has been inferred and quantified based on simultaneous presence of methane and abundant sulfate in open-ocean deep sediment interstitial water (D'Hondt et al, 2002;Wang et al, 2008). Simultaneous presence of methane and abundant sulfate is also observed in the basement fluids from CORK 1301A.…”

Section: Hypothesized Scenarios For a Non-standard State Redox Systemmentioning

confidence: 99%

Inorganic chemistry, gas compositions and dissolved organic carbon in fluids from sedimented young basaltic crust on the Juan de Fuca Ridge flanks

Lin

Cowen

Olson

et al. 2012

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Section: Hypothesized Scenarios For a Non-standard State Redox Systemmentioning

confidence: 99%

Inorganic chemistry, gas compositions and dissolved organic carbon in fluids from sedimented young basaltic crust on the Juan de Fuca Ridge flanks

Lin

Cowen

Olson

et al. 2012

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

“…Concentration and porosity data used in the modeling were adopted from the measurements. The correction of diffusivity for tortuosity followed the empirical relationships reported previously (Wang et al, 2008b). The modeling further assumed that sedimentation and compaction rates were zero and a steady state was reached within a definitive time scale so the term @C i /@t was zero.…”

Section: Metagenomic Analysismentioning

confidence: 99%

“…The modeling further assumed that sedimentation and compaction rates were zero and a steady state was reached within a definitive time scale so the term @C i /@t was zero. The programs (NRR1 and NRR2) developed by Wang et al (2008b) were employed to derive the predicted concentrations and net reaction rates for sulfate and methane. Given that chloride is soluble and inert to most abiotic and biological reactions in ambient environments, the reaction term (R i ) for chloride in the general diagenetic equation could be omitted.…”

Section: Metagenomic Analysismentioning

confidence: 99%

Metabolic stratification driven by surface and subsurface interactions in a terrestrial mud volcano

et al. 2012

View full text Add to dashboard Cite

Terrestrial mud volcanism represents the prominent surface geological feature, where fluids and hydrocarbons are discharged along deeply rooted structures in tectonically active regimes. Terrestrial mud volcanoes (MVs) directly emit the major gas phase, methane, into the atmosphere, making them important sources of greenhouse gases over geological time. Quantification of methane emission would require detailed insights into the capacity and efficiency of microbial metabolisms either consuming or producing methane in the subsurface, and establishment of the linkage between these methane-related metabolisms and other microbial or abiotic processes. Here we conducted geochemical, microbiological and genetic analyses of sediments, gases, and pore and surface fluids to characterize fluid processes, community assemblages, functions and activities in a methane-emitting MV of southwestern Taiwan. Multiple lines of evidence suggest that aerobic/anaerobic methane oxidation, sulfate reduction and methanogenesis are active and compartmentalized into discrete, stratified niches, resembling those in marine settings. Surface evaporation and oxidation of sulfide minerals are required to account for the enhanced levels of sulfate that fuels subsurface sulfate reduction and anaerobic methanotrophy. Methane flux generated by in situ methanogenesis appears to alter the isotopic compositions and abundances of thermogenic methane migrating from deep sources, and to exceed the capacity of microbial consumption. This metabolic stratification is sustained by chemical disequilibria induced by the mixing between upward, anoxic, methane-rich fluids and downward, oxic, sulfate-rich fluids.

show abstract

“…Although RTMs have been applied to explain the driving forces shaping numerous ecosystems, few have been used to quantify the activity of microorganisms in marine deep sediments. Notable exceptions include models applied to sediments from the Demerara Rise (Arndt et al, 2006) and the eastern equatorial Pacific (Wang et al, 2008). A RTM has recently been applied to quantify the rates of microbial catabolism in deep-sea hydrothermal vent chimneys , and similar types of models were used to constrain oxygen consumption patterns in upper oceanic crust (Orcutt et al, 2013) and North Pacific Gyre (Røy et al, 2012).…”

Section: Using Geochemical and Geophysical Data To Constrain Microbiamentioning

confidence: 99%

IODP Deep Biosphere Research Workshop report – a synthesis of recent investigations, and discussion of new research questions and drilling targets

et al. 2014

View full text Add to dashboard Cite

Abstract. During the past decade, the IODP (International Ocean Discovery Program) has fostered a significant increase in deep biosphere investigations in the marine sedimentary and crustal environments, and scientists are well-poised to continue this momentum into the next phase of the IODP. The goals of this workshop were to evaluate recent findings in a global context, synthesize available biogeochemical data to foster thermodynamic and metabolic activity modeling and measurements, identify regional targets for future targeted sampling and dedicated expeditions, foster collaborations, and highlight the accomplishments of deep biosphere research within IODP. Twenty-four scientists from around the world participated in this one-day workshop sponsored by IODP-MI and held in Florence, Italy, immediately prior to the Goldschmidt 2013 conference. A major topic of discussion at the workshop was the continued need for standard biological sampling and measurements across IODP platforms. Workshop participants renew the call to IODP operators to implement recommended protocols.

show abstract

Quantification of co-occurring reaction rates in deep subseafloor sediments

Cited by 62 publications

References 26 publications

Inorganic chemistry, gas compositions and dissolved organic carbon in fluids from sedimented young basaltic crust on the Juan de Fuca Ridge flanks

Inorganic chemistry, gas compositions and dissolved organic carbon in fluids from sedimented young basaltic crust on the Juan de Fuca Ridge flanks

Metabolic stratification driven by surface and subsurface interactions in a terrestrial mud volcano

IODP Deep Biosphere Research Workshop report – a synthesis of recent investigations, and discussion of new research questions and drilling targets

Contact Info

Product

Resources

About