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| Main Authors: | , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2025
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.975989 |
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| _version_ | 1867171340349341696 |
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| author | Stein, Ruediger Frederichs, Thomas Fahl, Kirsten Geibert, Walter Matthiessen, Jens Niessen, Frank Vogt, Christoph Sassenroth, Cynthia Bazhenova, Evgenia A |
| author_facet | Stein, Ruediger Frederichs, Thomas Fahl, Kirsten Geibert, Walter Matthiessen, Jens Niessen, Frank Vogt, Christoph Sassenroth, Cynthia Bazhenova, Evgenia A |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Sediment Core PS115/2-2 was recovered from the Amundsen Basin in 3600 m water depth at the eastern flank of the Gakkel Ridge during Polarstern Expedition PS115/2 in 2018 (Stein, 2019). The well-dated core is used to reconstruct in detail the interrelationship between ice-sheet dynamics and organic carbon burial in the central Eurasian Basin during the last 430 kyr, and to correlate marine and terrestrial records of the Eurasian Ice Sheet (EIS) history. Using organic-geochemical bulk parameters (i.e., TOC, C/N ratios, Rock Eval) and biomarkers, we have identified prominent well-defined sections with strongly elevated concentration of ancient (petrogenic) predominantly terrestrial OC, coinciding with glacial time intervals of extended ice sheets and the subsequent terminations/deglacials. Rock-Eval pyrolysis was performed on bulk ground sediment samples using a Rock-Eval 6 analyzer (cf., Lafarque et al., 1998) to determine (1) the amount of hydrocarbons (HC) present (S1 peak) and generated by pyrolytic degradation of the OC during heating up to 650°C (S2 peak), (2) the amount of carbon dioxide (CO2) generated from the decomposing OC during heating up to 390 °C (S3 peak), and (3) the temperature of maximum pyrolysis yield (Tmax value in °C). The HC and CO2 yields were normalized to OC and expressed as hydrogen index (HI) in mgHC/gOC and oxygen index (OI) in mgCO2/gOC, respectively, and may give information about the composition of the organic matter. Tmax values may give further information about the composition as well as the maturity of the organic matter. For details and methods, we refer to Stein et al. (this paper). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_975989 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Rock eval analysis of sediment core PS115/2_2 Stein, Ruediger Frederichs, Thomas Fahl, Kirsten Geibert, Walter Matthiessen, Jens Niessen, Frank Vogt, Christoph Sassenroth, Cynthia Bazhenova, Evgenia A AGE; Arctic Ocean; BC; Box corer; Carbon, organic, total; Carbon dioxide yield, S3, per unit sediment mass; DEPTH, sediment/rock; Element analyser CHN, Heraeus; Eurasian Ice Sheet History; Event label; Giant box corer; GKG; Hydrocarbon yield, S1, per unit sediment mass; Hydrocarbon yield, S2, per unit sediment mass; Hydrogen index, mass HC, per unit mass total organic carbon; Late Pleistocene; Organic carbon (OC) burial; Oxygen index, mass CO2, per unit mass total organic carbon; Polarstern; PS115/2; PS115/2_2-1; PS115/2_2-2; Pyrolysis temperature maximum; Pyrolysis temperature peak; Rock eval pyrolysis Sediment Core PS115/2-2 was recovered from the Amundsen Basin in 3600 m water depth at the eastern flank of the Gakkel Ridge during Polarstern Expedition PS115/2 in 2018 (Stein, 2019). The well-dated core is used to reconstruct in detail the interrelationship between ice-sheet dynamics and organic carbon burial in the central Eurasian Basin during the last 430 kyr, and to correlate marine and terrestrial records of the Eurasian Ice Sheet (EIS) history. Using organic-geochemical bulk parameters (i.e., TOC, C/N ratios, Rock Eval) and biomarkers, we have identified prominent well-defined sections with strongly elevated concentration of ancient (petrogenic) predominantly terrestrial OC, coinciding with glacial time intervals of extended ice sheets and the subsequent terminations/deglacials. Rock-Eval pyrolysis was performed on bulk ground sediment samples using a Rock-Eval 6 analyzer (cf., Lafarque et al., 1998) to determine (1) the amount of hydrocarbons (HC) present (S1 peak) and generated by pyrolytic degradation of the OC during heating up to 650°C (S2 peak), (2) the amount of carbon dioxide (CO2) generated from the decomposing OC during heating up to 390 °C (S3 peak), and (3) the temperature of maximum pyrolysis yield (Tmax value in °C). The HC and CO2 yields were normalized to OC and expressed as hydrogen index (HI) in mgHC/gOC and oxygen index (OI) in mgCO2/gOC, respectively, and may give information about the composition of the organic matter. Tmax values may give further information about the composition as well as the maturity of the organic matter. For details and methods, we refer to Stein et al. (this paper). |
| title | Rock eval analysis of sediment core PS115/2_2 |
| topic | AGE; Arctic Ocean; BC; Box corer; Carbon, organic, total; Carbon dioxide yield, S3, per unit sediment mass; DEPTH, sediment/rock; Element analyser CHN, Heraeus; Eurasian Ice Sheet History; Event label; Giant box corer; GKG; Hydrocarbon yield, S1, per unit sediment mass; Hydrocarbon yield, S2, per unit sediment mass; Hydrogen index, mass HC, per unit mass total organic carbon; Late Pleistocene; Organic carbon (OC) burial; Oxygen index, mass CO2, per unit mass total organic carbon; Polarstern; PS115/2; PS115/2_2-1; PS115/2_2-2; Pyrolysis temperature maximum; Pyrolysis temperature peak; Rock eval pyrolysis |
| url | https://doi.org/10.1594/PANGAEA.975989 |