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  • Data  (7)
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  • 1
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    Petrography and geochemistry of organic matter at DSDP Holes 80-549 and 80-550B
    PANGAEA
    In:  Supplement to: Hartung, Birgitta; Mukhopadhyay, Prasanta K; Rullkötter, Jürgen; Schaefer, Rainer G; Welte, Dietrich Hugo (1985): Petrography and geochemistry of organic matter in Cretaceous sediments from the Goban Spur, Deep Sea Drilling Project Leg 80. In: De Graciansky, PC; Poag, CW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Gov. Printing Office), 80, 983-991, https://doi.org/10.2973/dsdp.proc.80.145.1985
    Details
    Publication Date: 2023-05-12
    Description: Three lower Barremian to middle/upper Cenomanian samples from DSDP Hole 549 and three lower Cenomanian to lower Maestrichtian samples from DSDP Hole 550B were investigated by organic geochemical and organic petrographic methods. The samples came from wells drilled in the area of the Goban Spur in the northeastern Atlantic; they represent gray to greenish gray carbonaceous mud or siltstones from the deeper parts of the Cretaceous sequences penetrated and light-colored chalks from the shallower ones. The total amount of organic carbon is below 1% in all samples; it is especially low in the Cenomanian to Maestrichtian chalks. Terrigenous organic matter predominates; only the Barremian sample shows a moderate number of marine phytoclasts. As indicated by several parameters, the maturity of the organic matter is low, corresponding to about 0.4% vitrinite reflectance.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 2
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    Larcform 1 - single column model intercomparison of Arctic air formation, link to model results in NetCDF format (2016)
    PANGAEA
    In:  Supplement to: Pithan, Felix; Ackerman, Andrew; Angevine, Wayne; Hartung, Kerstin; Ickes, Luisa; Kelley, Maxwell; Medeiros, Brian P; Sandu, Irina; Steeneveld, Gert-Jan; Sterk, HAM; Svensson, Gunilla; Vaillancourt, Paul A; Zadra, Ayrton (2016): Strengths and biases of models in representing the Arctic winter boundary layer - the Larcform 1 single column model intercomparison. Journal of Advances in Modeling Earth Systems, 8(3), 1345-1357, https://doi.org/10.1002/2016MS000630
    Details
    Publication Date: 2023-01-13
    Description: Weather and climate models struggle to represent lower tropospheric temperature and moisture profiles and surface fluxes in Arctic winter, not least because they lack or misrepresent physical processes that are specific to high latitudes. The Arctic boundary layer in winter has been observed to be in either a radiatively clear or cloudy state: The radiatively clear state is characterized by strong surface radiative cooling leading to the build-up of surface-based temperature inversions, whereas the cloudy state occurs when cloud liquid water is present in the atmospheric column, allowing little or no surface radiative cooling and leading to weaker and typically elevated temperature inversions. Many large-scale models have been shown to lack the cloudy state, and some do substantially underestimate stability in the clear state. We here present results from the first Lagrangian ARCtic air FORMation experiment (Larcform 1), a GASS (Global atmospheric system studies) single-column model intercomparison which reproduces these biases of large-scale models in an idealised setup.
    Type: Dataset
    Format: application/zip, 8.9 MBytes
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  • 3
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    (Table 2) Organic petrography at DSDP Hole 80-549
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 80-549; Alginite; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Inertinite; Leg80; Liptinite, marine; Liptinite, terrigenous; Liquid chromatography; North Atlantic/SPUR; Organic matter, amorphous; Sample code/label; see reference(s); Stage; Vitrinite; Vitrinite reflection; Vitrinite reflection, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 22 data points
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  • 4
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    Geochemistry and petrography of organic matter at DSDP Hole 77-535
    PANGAEA
    In:  Supplement to: Rullkötter, Jürgen; Mukhopadhyay, Prasanta K; Hartung, Birgitta; Welte, Dietrich Hugo (1984): Geochemistry and petrography of organic matter in Cretaceous sediments from the southeastern Gulf of Mexico, Deep Sea Drilling Project Hole 535 - preliminary results. In: Buffler, RT; Schlager, W; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 77, 489-493, https://doi.org/10.2973/dsdp.proc.77.115.1984
    Details
    Publication Date: 2023-06-27
    Description: Organic geochemical and organic petrographic methods were used to study three Lower to middle Cretaceous sediment samples from Hole 535 in the southeastern Gulf of Mexico for organic matter contents and origin and level of maturation. All three samples contain mixed kerogen Type II/III organic matter with a maturity corresponding to about 0.4% vitrinite reflectance. The marine component increases with stratigraphic age, and microbial reworking of the organic matter is significant in each age. The lower two samples of Hauterivian to Valanginian age appear to be impregnated (or contaminated) with soluble polar organic compounds, but there is only a weak indication for the presence of more mature, nonindigenous hydrocarbons.
    Keywords: 77-535; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Gulf of Mexico/BASIN; Leg77
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
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    (Table 1) Organic carbon contents, total extract yields, and Rock-Eval pyrolysis at DSDP Holes 80-549 and 80-550B
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 80-549; 80-550B; Carbon, organic, total; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Element analyser CHN, LECO; Event label; Glomar Challenger; Hydrogen index, mass HC, per unit mass total organic carbon; Leg80; Lithology/composition/facies; North Atlantic/PLAIN; North Atlantic/SPUR; Oxygen index, mass CO2, per unit mass total organic carbon; Pyrolysis temperature maximum; Rock eval pyrolysis (Espitalié et al. 1977); Sample code/label; Stage; Total extract from total organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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  • 6
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    (Table 1) Organic carbon contents, total extract yields, and Rock-Eval pyrolysis at DSDP Hole 77-535
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 77-535; Aromatic hydrocarbon fraction; Carbon, organic, total; Compounds; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Extract; Glomar Challenger; Gulf of Mexico/BASIN; Hydrogen index, mass HC, per unit mass total organic carbon; Leg77; Liquid chromatography; Lithology/composition/facies; Nonaromatic hydrocarbon fraction; Oxygen index, mass CO2, per unit mass total organic carbon; Pyrolysis temperature maximum; Rock eval pyrolysis (Espitalié et al. 1977); Sample code/label; Stage; Total extract from total organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 36 data points
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  • 7
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    (Table 2) Organic petrography at DSDP Hole 77-535
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 77-535; Alginite; Bituminite; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Fluorescence determination; Fluorescence intensity; Gas chromatography - Mass spectrometry (GC-MS); Glomar Challenger; Gulf of Mexico/BASIN; Inertinite; Leg77; Liptinite, terrigenous; Ratio; Sample code/label; Vitrinite; Vitrinite reflection; Vitrinite reflection, standard deviation; Wavelength of highest fluorescence intensity
    Type: Dataset
    Format: text/tab-separated-values, 34 data points
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