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  • 1
    facet.materialart.
    Unknown
    Annotated record of the detailed examination of Mn deposits from DSDP Leg 44 (Holes 389, 390, 390A, 392 and 392A) (1978)
    PANGAEA
    In:  Supplement to: Benson, William E; Enos, Paul; Freeman, Tom; Gradstein, Felix M; Murdmaa, Ivar O; Pastouret, L; Schmidt, Ronald R; Sheridan, Robert E; Stuermer, D H; Weaver, Fred M; Worstell, Paula J (1978): Initial Reports of the Deep Sea Drilling Project. U. S. Government Printing Office, XLIV, 1005 pp, https://doi.org/10.2973/dsdp.proc.44.1978
    Details
    Publication Date: 2023-08-28
    Description: The western part of the North Atlantic Ocean holds clues to some of the most intriguing questions in marine geology. But because the geologic problems are many and varied, the sites of Leg 44 were multipurpose in nature. In particular, some of the targets were : 1) the Blake Nose, a spur of the Blake Plateau, to determine the nature, age, and origin of reef-like structures recognized on seismic profiles and 2) the Blake Outer Ridge, a long low ridge of sediments that forms the eastern boundary of the Blake-Bahama Basin, where we hoped to study the stratigraphy and sample supposed clathrates.
    Keywords: 44-389; 44-390; 44-390A; 44-392; 44-392A; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; File name; Glomar Challenger; Identification; Leg44; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic; North Atlantic/CONT RISE; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Uniform resource locator/link to image; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 188 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Source indicators of humic substances and proto-kerogen - Stable isotope ratios, elemental compositions and electron spin resonance spectra (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Stable isotope ratios of C, N and H, elemental compositions, and electron spin resonance (ESR) data of humic acids and proto-kerogens from twelve widely varying sampling locations are presented. Humic acids and proto-kerogens from algal sources are more aliphatic and higher in N than those from higher plant sources. Oxygen content appears to represent a measure of maturation, even in Recent sediments, and S content may reflect redox conditions in the environment of deposition. The ESR data indicate that the transformation of humic substances to proto-kerogens in Recent sediments is accompanied by an increase in aromatic character. A combination of stable carbon isotope ratio and H/C ratio may be a simple but reliable source indicator which allows differentiation of marine-derived from terrestrially-derived organic matter. The stable nitrogen isotope ratios are useful indicators of nitrogen nutrient source. Deuterium/hydrogen isotope ratios appear to reflect variations in meteoric waters and are not reliable source indicators.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Geochimica et Cosmochimica Acta; 42; July 197
    Format: text
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    NASA TECHNICAL REPORTS
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