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Phospholipid fatty acid and quinone composition of sediments from ODP Leg 205 sites

Authors
Publisher
PANGAEA
Publication Date
Identifiers
DOI: 10.1594/pangaea.775337
Keywords
  • + = Present
  • - = Absent
  • = Antero-Pentadecanoic Acid
  • = Iso-Heptadecanoic Acid
  • = Iso-Pentadecanoic Acid
  • 12-Methyl-Tetradecanoic Acid Of Total Fatty Acids
  • 13-Methyl-Tetradecanoic Acid Of Total Fatty Acids
  • 14:0
  • 15:0
  • 15-Methyl-Hexadecanoic Acid Of Total Fatty Acids
  • 16:0
  • 17:0
  • 18:0
  • 20:0
  • 205-1253A
  • 205-1254A
  • 205-1255A
  • Ai15:0
  • Bdq
  • Bioenergetic Divergence Index
  • C13:0
  • Desoxyribonucleic Acid
  • Detection Level
  • Dilution
  • Dilution Factor
  • Dl
  • Dna
  • Drilling
  • Eicosanoic Acid Of Total Fatty Acids
  • Fluorescence-Based Quantitative Real-Time Pcr (Qpcr)
  • Fluorometry
  • Gas Chromatography
  • Gas Chromatography - Mass Spectrometry (Gc-Ms)
  • Heptadecanoic Acid Of Total Fatty Acids
  • Hexadecanoic Acid Of Total Fatty Acids
  • I17:0
  • I-C14:0
  • Ic15:0
  • I-C16:0
  • Iso-Hexadecanoic Acid Of Total Fatty Acids
  • Iso-Tetradecanoic Acid Of Total Fatty Acids
  • Joides Resolution
  • Label
  • Leg205
  • M
  • -Gene Copy No
  • Mass Spectrometry
  • Mdq
  • Menaquinone
  • Dry Sediment
  • Methanogen-Specific Gene Copy Number
  • Microbial Divergence Index
  • Mk4
  • Mk5
  • Mk6
  • Mk7
  • Mk8
  • Mk9
  • Mk Dry Sed
  • North Pacific Ocean
  • Ocean Drilling Program
  • Octadecanoic Acid Of Total Fatty Acids
  • Odp
  • Odp Sample Designation
  • Pentadecanoic Acid Of Total Fatty Acids
  • Phospholipid Fatty Acids
  • Plfa
  • Qq Tot
  • Dry Sed
  • Quinones
  • Total
  • Dry Sediment
  • Ratio
  • Samp Com
  • Sample Code/Label
  • Sample Comment
  • Sample Mass
  • Sample Specific
  • Samp M
  • Tetradecanoic Acid Of Total Fatty Acids
  • Total
  • Tridecanoid Acid Of Total Fatty Acids
  • Ubiquinone
  • Dry Sediment
  • Uq/Mk
  • Uq10
  • Uq6
  • Uq7
  • Uq8
  • Uq9
  • Uq Dry Sed
Disciplines
  • Biology
  • Chemistry
  • Earth Science
  • Ecology
  • Geography

Abstract

Assessing the habitability of deep-sea sediments undergoing compaction, compression, and subduction at convergent margins adds to our understanding of the limits of the terrestrial biosphere. In this work, we report exploratory biomarker data on sediments obtained at Ocean Drilling Program (ODP) Sites 1253, 1254, and 1255 during drilling at the Costa Rica subduction trench and forearc sedimentary wedge. The samples selected for postcruise biomarker analyses were located within intervals of potentially enhanced fluid flow within the décollement and sedimentary wedge fault zones (Sites 1254 and 1255) and within basal carbonates at the reference site (Site 1253). The passage of fluids that are geochemically distinct from ambient interstitial water provides a disequilibrium setting that may enhance habitability. Biomarker data show low levels of microbial biomass in subseafloor sediments sampled at the Costa Rica convergent margin as deep as ~370 meters below seafloor.

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