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  • 207-1257; 207-1258; COMPCORE; Composite Core; DEPTH, sediment/rock; Diacylglycerol-phosphatidylcholine; Diacylglycerol-phosphatidyldimethylethanolamine; Diethylglycerol-diglycosyl; Diglycosyl-glycerol dialkyl glycerol tetraether; DSDP/ODP/IODP sample designation; High Performance Liquid Chromatography - Mass spectrometry (HPLC-MS); Intact polar lipid; Joides Resolution; Leg207; Lithology/composition/facies; Monoglycosyl-glycerol dialkyl glycerol tetraether; Ocean Drilling Program; ODP; Sample code/label; Sample mass; South Atlantic Ocean; Triglycosyl-glycerol dialkyl glycerol tetraether  (1)
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    (Table T2) Relative signal intensity of intact polar lipids in sediments from ODP Sites 207-1257 and 207-1258 (2007)
    PANGAEA
    In:  Supplement to: Fredricks, Helen F; Hinrichs, Kai-Uwe (2007): Data Report: Intact membrane lipis as indicators of subsurface life in Cretaceous and Paleogene sediments from Sites 1257 and 1258. In: Mosher, DC; Erbacher, J; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX, 207, 1-11, https://doi.org/10.2973/odp.proc.sr.207.112.2007
    Details
    Publication Date: 2024-01-09
    Description: We report results from the analysis of intact polar lipids (IPLs) in sediments from Ocean Drilling Program Sites 1257 and 1258. IPLs, constituting the cell membranes of living organisms, were detected in organic-lean sediments but not in underlying organic-rich black shales. Microbial activity in organic-lean sediments is likely due to sulfate-dependent oxidation of methane whereas difficulties detecting IPLs in black shales are interpreted to result from unfavorable signal-to-noise ratios due to low cell concentrations in combination with extremely high analytical noise created by uncharacterized organic matrix. IPLs found are consistent with a low-diversity community of archaea and bacteria. The concentrations of IPLs are more than one order of magnitude lower than those in Neogene deep subsurface sediments at the Peruvian margin, suggestive of significantly lower cell concentrations in Demerara Rise. This finding is consistent with inferred low rates of subsurface microbial activity.
    Keywords: 207-1257; 207-1258; COMPCORE; Composite Core; DEPTH, sediment/rock; Diacylglycerol-phosphatidylcholine; Diacylglycerol-phosphatidyldimethylethanolamine; Diethylglycerol-diglycosyl; Diglycosyl-glycerol dialkyl glycerol tetraether; DSDP/ODP/IODP sample designation; High Performance Liquid Chromatography - Mass spectrometry (HPLC-MS); Intact polar lipid; Joides Resolution; Leg207; Lithology/composition/facies; Monoglycosyl-glycerol dialkyl glycerol tetraether; Ocean Drilling Program; ODP; Sample code/label; Sample mass; South Atlantic Ocean; Triglycosyl-glycerol dialkyl glycerol tetraether
    Type: Dataset
    Format: text/tab-separated-values, 25 data points
    Location Call Number Expected Availability
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