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  • 1
    Electronic Resource
    Electronic Resource
    A carbon isotope record of CO 2 levels during the late Quaternary (1990)
    [s.l.] : Nature Publishing Group
    Nature 347 (1990), S. 462-464 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Popp and coworkers3 have suggested a relationship between carbon isotope fractionation and dissolved CO2 of the form ep= a log c + b (D where ep is the isotope effect (%〉) associated with photosynthetic fixation of carbon, c is the concentration of dissolved CO2 (|xM), and a and b are ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/347462a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Glacial–interglacial climatically forced δ 13 C variations in sedimentary organic matter (1989)
    [s.l.] : Nature Publishing Group
    Nature 342 (1989), S. 60-62 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Pigmy Basin is a late Quaternary blocked-canyon intra-slope basin the northern Gulf of Mexico10 (Fig. 1). The basin has normally oxic and saline bottom waters11. In interglacial times (isotope (sub)stages 1 and 5a,b) sedimentation rates ranged from 60 to SScmkyr"1, whereas during glacial times ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/342060a0
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  • 3
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    (Table 1) Age and wet bulk density of sediments from DSDP Hole 96-619
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 96-619; Age model; Deep Sea Drilling Project; Density, wet bulk; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Gulf of Mexico; Leg96; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 165 data points
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  • 4
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    (Table 2) Contents and isotopic composition of carbon in sediments from DSDP Hole 96-619
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 96-619; Calcium carbonate; Calculated; Calculated from pressure; Carbon, organic, marine matter; Carbon, organic, terrestrial matter; Carbon, organic, total; Carbon/Nitrogen ratio; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Element analyser CHN, Perkin-Elmer 240; Glomar Challenger; Gulf of Mexico; Leg96; Mass spectrometer Finnigan MAT 251; Sample code/label; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 385 data points
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  • 5
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    (Table 3) n-C27-C33 odd alkanes and n-C26-C32 even alkohols in organic matter of sediments from DSDP Hole 96-619
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 96-619; Age model; Calculated; Carbon Preference Index; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Gas chromatography - Mass spectrometry (GC-MS); Glomar Challenger; Gulf of Mexico; Leg96; Mass spectrometer Finnigan MAT 251; Sample code/label; Sum even numbered n-fatty alkanols C26-C32, per unit mass total organic carbon; Sum odd numbered n-alkanes C27-C33, per unit mass total organic carbon; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 213 data points
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  • 6
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    (Table 4) C27 - C29 sterols in organic matter of sediments from DSDP Hole 96-619
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 96-619; Age model; C27 sterols, per unit mass total organic carbon; C28 sterols, per unit mass total organic carbon; C29 sterols, per unit mass total organic carbon; C30-sterols, per unit mass total organic carbon; Calculated; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Gas chromatography - Mass spectrometry (GC-MS); Glomar Challenger; Gulf of Mexico; Leg96; Mass spectrometer Finnigan MAT 251; Sample code/label; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 589 data points
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  • 7
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    Physical properties and bulk organic geochemical results for sediments from DSDP Hole 96-619
    PANGAEA
    In:  Supplement to: Jasper, John P; Gagosian, Robert B (1990): The sources and deposition of organic matter in the late Quaternary Pigmy Basin, Gulf of Mexico. Geochimica et Cosmochimica Acta, 54(4), 1117-1132, https://doi.org/10.1016/0016-7037(90)90443-O
    Details
    Publication Date: 2023-06-27
    Description: The concentration and carbon isotopic composition (d13C) of sedimentary organic carbon (C_org), N/C ratios, and terrigenous and marine d13C_org endmembers form a basis from which to address problems of Late Quaternary glacial-interglacial climatic variability in a 208.7 m hydraulic piston core (DSDP 619) from the Pigmy Basin in the northern Gulf of Mexico. While interpretations of sedimentary d13C_org time series records are often not unique, paired analyses of d13C_org and N/C are consistent with the hypothesis that the C_org in the Pigmy Basin is a climatically determined mixture of C3-photosynthetic terrigenous and marine organic matter, confirming the earlier d13C_org model of Sackett (1964). A high resolution (~1.4-2.9 Ka/sample) d13C_org record shows that sedimentary organic carbon in interglacial oxygen isotope (sub)stages 1 and 5a-b are enriched in 13C (average +/-1 sigma values are -24.2+/-1.2‰ and -22.9+/-0.7‰ relative to PDB, respectively) while glacial isotope stage values 2 are relatively depleted (-25.6+/-0.5‰). Concentrations of terrigenous and marine sedimentary organic carbon are calculated for the first time using d13C_org and C_org measurements, and empirically determined terrigenous and marine d13C_org endmembers. The net accumulation rate of terrigenous organic carbon is 4.3+/-2.6 times higher in isotope stages 2-4 than in (sub)stages 1 and 5a-b, recording higher erosion rates of terrigenous organic material in glacial times. The concentration and net accumulation rates of marine and terrigenous C_org suggest that the nutrient-bearing plume of the Mississippi River may have advanced and retreated across the Pigmy Basin as sea level fell and rose in response to glacial-interglacial sea level change.
    Keywords: 96-619; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Gulf of Mexico; Leg96
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 8
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    Organic biomarker compound concentrations in sediments from DSDP Hole 96-619
    PANGAEA
    In:  Supplement to: Jasper, John P; Gagosian, Robert B (1993): The relationship between sedimentary organic carbon isotopic composition and organic biomarker compound concentration. Geochimica et Cosmochimica Acta, 57(1), 167-186, https://doi.org/10.1016/0016-7037(93)90477-E
    Details
    Publication Date: 2023-06-27
    Description: A study of organic biomarker compounds which could serve as tracers of terrigenous and marine sedimentary organic matter sources was performed on samples from a 208.7 m hydraulic piston core hole (DSDP Hole 619) from the hemipelagic Pigmy Basin in the northern Gulf of Mexico. Organic carbon-normalized concentrations of total long chain (C37-C39) alkenones and some individual C27-C29 desmethyl sterols were determined to be useful proportional indicators (tracers) of preserved marine and terrigenous organic carbon, respectively. The alkenones, whose only known source is marine phytoplankton of the class Prymnesiophyceae, generally occurred in higher concentrations in interglacial isotope stages 1 and 5a-b than in the intervening glacial stages. Sterols (C27-C29), apparently of a dominantly terrigenous origin, occurred in lower concentrations during interglacial stages than in glacial stages. Tracers of both terrigenous and marine organic matter appear to be affected by the differential diagenetic alteration of the biomarker/Corg ratios, as indicated by a simple, first-order kinetic model. The lack of any desmethylor 4a-methylsterol which is linearly related to the proportion of marine sedimentary organic matter (as scaled by d13Corg) indicates that either (1) sedimentary diagenesis has obscured the biomarker/Corg vs. d13Corg record, or (2) phytoplanktonic assemblage changes caused variations in the biomarker/Corg ratio of the primary input. Preferential preservation of terrigenous sterols may result in a biased sedimentary record of sterol input which could be misinterpreted as indicating solely terrigenous sterol sources. A simple model which characterizes the effects of sedimentary diagenesis on the relationship between Corg-normalized biomarker ratios and d13Corg demonstrates the potential problems of long-term, differential-diagenetic skewing on those tracer records.
    Keywords: 96-619; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Gulf of Mexico; Leg96
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
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    C1-C8 hydrocarbons in marine sediments
    PANGAEA
    In:  Supplement to: Whelan, Jean K; Hunt, John M; Jasper, John P; Huc, Alain Y (1984): Migration of C1-C8 hydrocarbons in marine sediment. Organic Geochemistry, 6, 683-694, https://doi.org/10.1016/0146-6380(84)90089-5
    Details
    Publication Date: 2023-06-27
    Description: Light hydrocarbon (C1-C8) profiles are compared for three wells of varying maturities: two immature DSDP wells (Site 397 near the Canary Islands and Site 530A near the Walvis Ridge in the south-east Atlantic) and a mature well, the East Cameron well in the Texas Gulf Coast. Primary migration of C1 and C2 appears to be occurring in all of the sedimentary rocks examined. Primary migration of C3+ components becomes important only as fine-grained sedimentary rocks enter the catagenetic hydrocarbon generation zone or over short distances in more permeable sections. Lateral migration along bedding planes was more important than vertical migration in sedimentary rocks of all maturities. The lightest (methane, ethane and propane gases) hydrocarbon show greater fractionation than do the C4-C8 alkanes which generally show minimal fractionation during the migrational process. Subsurface diffusion coefficients for these p.p.b. quantities of C2-C5 alkanes from immature sediments from DSDP Site 530 are estimated to be several orders of magnitude less than values reported in the literature for diffusion of much larger amounts of these compounds from mature water wet sediments into air or sandstones. Since our calculations suggest light hydrocarbons are present in amounts less than their reported solubilities in pure water at 25°C, we postulate that the sediment organic matter has a substantial effect on retarding the movement of these light hydrocarbons.
    Keywords: 63-467; 64-481A; 75-530A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg63; Leg64; Leg75; North Pacific/GAP; North Pacific/Gulf of California/BASIN; South Atlantic/RIDGE
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
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    Migration of C1 to C8 volatile organic compounds in sediments at DSDP Hole 75-530A
    PANGAEA
    In:  Supplement to: Jasper, John P; Whelan, Jean K; Hunt, John M (1984): Migration of C1 to C8 volatile organic compounds in sediments from the Deep Sea Drilling Project, Leg 75, Hole 530A. In: Hay, WW; Sibuet, J-C; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 75, 1001-1008, https://doi.org/10.2973/dsdp.proc.75.131.1984
    Details
    Publication Date: 2023-06-27
    Description: The distribution of C1 to C8 hydrocarbons in sediment samples from DSDP Leg 75, Hole 530A, indicates that significant amounts of methane and ethane have migrated from organic-rich to organic-lean shales in close proximity. Most compounds larger than ethane are not migrating out of black shales, where they occur in high concentrations. These results lead to a general model for assessing migration. In addition, three shale types are identified on the basis of organic carbon and pyrolysis products and patterns.
    Keywords: 75-530A; 75-532; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg75; South Atlantic; South Atlantic/RIDGE
    Type: Dataset
    Format: application/zip, 4 datasets
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