Dataset: AT15-40 Porewater Geochemistry
Deployment: AT15-40

Porewater geochemistry data for sediment samples that were included in global seep survey
Principal Investigator: 
Andreas Teske (University of North Carolina at Chapel Hill, UNC-Chapel Hill)
Co-Principal Investigator: 
Daniel B. Albert (University of North Carolina at Chapel Hill, UNC-Chapel Hill)
Barbara J. MacGregor (University of North Carolina at Chapel Hill, UNC-Chapel Hill)
Christopher S. Martens (University of North Carolina at Chapel Hill, UNC-Chapel Hill)
BCO-DMO Data Manager: 
Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)
Current State: 
Final no updates expected
Version: 
18 July 2012
Version Date: 
2012-07-18
Description

Porewater geochemistry of Guaymas Basin hydrothermal sediments (Southern Spreading segment, 27°00.44N and 111°24.55W, 2000 m water depth) including methane, CO2, and sulfate. 

During two R/V Atlantis cruises to Guaymas Basin, the association of Beggiatoa mats with hydrothermal seepage and the habitat preferences of various Beggiatoa types were investigated by geochemical and microbiological characterization of sediments underneath Beggiatoa mats in combination with temperature measurements down to 40 cm sediment depth. In particular, temperature profiles and corresponding sulfide, sulfate, dissolved inorganic carbon (DIC), delta 13C-DIC, methane, and delta 13C-methane gradients from mats exhibiting orange-to-white color transitions were examined to elucidate hydrothermal fluid delivery and/or tolerance associated with differently colored Beggiatoa types (McKay et al. 2012)

 

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