(Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples
The Cenozoic sediments sampled in ODP Leg 104 on the Vøring Plateau show a distinct variability of the total organic carbon content (TOC) and the accumulation rates of TOC. Based on the geochemical and organic-petrographic characterization of the sedimentary organic matter (OM), the allochthonous an...
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1994
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.758978 2023-05-15T15:39:13+02:00 (Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples Hölemann, Jens A Henrich, Rüdiger MEDIAN LATITUDE: 67.206100 * MEDIAN LONGITUDE: 2.846100 * SOUTH-BOUND LATITUDE: 66.678300 * WEST-BOUND LONGITUDE: 1.033300 * NORTH-BOUND LATITUDE: 67.715000 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1985-06-28T14:40:00 * DATE/TIME END: 1985-08-09T10:15:00 * MINIMUM ELEVATION: -2780.0 m * MAXIMUM ELEVATION: -1226.0 m 1994-04-06 text/tab-separated-values, 36 data points https://doi.pangaea.de/10.1594/PANGAEA.758978 https://doi.org/10.1594/PANGAEA.758978 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.758978 https://doi.org/10.1594/PANGAEA.758978 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hölemann, Jens A; Henrich, Rüdiger (1994): Allochthonous versus autochthonous organic matter in Cenozoic sediments of the Norwegian Sea: Evidence for the onset of glaciations in the northern hemisphere. Marine Geology, 121(1-2), 87-103, https://doi.org/10.1016/0025-3227(94)90159-7 104-642B 104-643A 104-644A AGE Alginite Carbon organic total Coal clasts or fragments Detrinite DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN LECO CS 125 Event label Facies name/code Fluorescent microscope Hydrogen index mass HC per unit mass total organic carbon Isotopic event Joides Resolution Leg104 Liptodetrinite Norwegian Sea Ocean Drilling Program ODP Rock eval pyrolysis (Behar et al. 2001) Sample code/label Sporinite Temperature in rock/sediment maximum Vitrinite Dataset 1994 ftpangaea https://doi.org/10.1594/PANGAEA.758978 https://doi.org/10.1016/0025-3227(94)90159-7 2023-01-20T08:52:06Z The Cenozoic sediments sampled in ODP Leg 104 on the Vøring Plateau show a distinct variability of the total organic carbon content (TOC) and the accumulation rates of TOC. Based on the geochemical and organic-petrographic characterization of the sedimentary organic matter (OM), the allochthonous and autochthonous proportion of the OM could be quantified. The results clearly demonstrate that high TOC percentages and TOC accumulation rates in Cenozoic sediment sections display a generally high input of allochthonous organic matter. Oxidized and partly well-rounded organic particles built up the main portion of OM within the Miocene, TOC-rich sediments. The most probable source of this oxidized OM are reworked sediments from the Scandinavian shelf. Changes in the input of these organic particles are to some degree correlative with sea-level changes. The Cenozoic accumulation of autochthonous OM is low and does not reveal a clear variation during the Miocene and early Pliocene. In spite of a high accumulation rate of biogenic opal during the Early Miocene, the accumulation rate of autochthonous TOC is low. The autochthonous particle assemblage is dominated by relatively inert OM, like dinoflagellate cysts. This points to an intensive biological and/or early diagenetic degradation of the marine OM under well oxidized bottom water conditions during the last 23 Myr. Nevertheless, a continuation of marine OM degradation during later stages of diagenesis cannot be excluded. A prominent dominance of allochthonous OM over autochthonous is documented with the beginning of the Pliocene. At 2.45 Ma the episodic occurrence of ice-rafted, thermally mature OM reflects the onset of the glacial erosion of Mesozoic, coal and black shale bearing sediments on the Scandinavian and Barents Sea shelves. The first occurrence of these, in view of the actual burial depth, thermally overmature OM particles is, therefore, a marker for the beginning of the strong Scandinavian glaciation and the advance of the glacial front toward the shelves. Dataset Barents Sea Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Barents Sea Norwegian Sea Vøring Plateau ENVELOPE(4.000,4.000,67.000,67.000) ENVELOPE(1.033300,4.576700,67.715000,66.678300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
104-642B 104-643A 104-644A AGE Alginite Carbon organic total Coal clasts or fragments Detrinite DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN LECO CS 125 Event label Facies name/code Fluorescent microscope Hydrogen index mass HC per unit mass total organic carbon Isotopic event Joides Resolution Leg104 Liptodetrinite Norwegian Sea Ocean Drilling Program ODP Rock eval pyrolysis (Behar et al. 2001) Sample code/label Sporinite Temperature in rock/sediment maximum Vitrinite |
spellingShingle |
104-642B 104-643A 104-644A AGE Alginite Carbon organic total Coal clasts or fragments Detrinite DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN LECO CS 125 Event label Facies name/code Fluorescent microscope Hydrogen index mass HC per unit mass total organic carbon Isotopic event Joides Resolution Leg104 Liptodetrinite Norwegian Sea Ocean Drilling Program ODP Rock eval pyrolysis (Behar et al. 2001) Sample code/label Sporinite Temperature in rock/sediment maximum Vitrinite Hölemann, Jens A Henrich, Rüdiger (Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples |
topic_facet |
104-642B 104-643A 104-644A AGE Alginite Carbon organic total Coal clasts or fragments Detrinite DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN LECO CS 125 Event label Facies name/code Fluorescent microscope Hydrogen index mass HC per unit mass total organic carbon Isotopic event Joides Resolution Leg104 Liptodetrinite Norwegian Sea Ocean Drilling Program ODP Rock eval pyrolysis (Behar et al. 2001) Sample code/label Sporinite Temperature in rock/sediment maximum Vitrinite |
description |
The Cenozoic sediments sampled in ODP Leg 104 on the Vøring Plateau show a distinct variability of the total organic carbon content (TOC) and the accumulation rates of TOC. Based on the geochemical and organic-petrographic characterization of the sedimentary organic matter (OM), the allochthonous and autochthonous proportion of the OM could be quantified. The results clearly demonstrate that high TOC percentages and TOC accumulation rates in Cenozoic sediment sections display a generally high input of allochthonous organic matter. Oxidized and partly well-rounded organic particles built up the main portion of OM within the Miocene, TOC-rich sediments. The most probable source of this oxidized OM are reworked sediments from the Scandinavian shelf. Changes in the input of these organic particles are to some degree correlative with sea-level changes. The Cenozoic accumulation of autochthonous OM is low and does not reveal a clear variation during the Miocene and early Pliocene. In spite of a high accumulation rate of biogenic opal during the Early Miocene, the accumulation rate of autochthonous TOC is low. The autochthonous particle assemblage is dominated by relatively inert OM, like dinoflagellate cysts. This points to an intensive biological and/or early diagenetic degradation of the marine OM under well oxidized bottom water conditions during the last 23 Myr. Nevertheless, a continuation of marine OM degradation during later stages of diagenesis cannot be excluded. A prominent dominance of allochthonous OM over autochthonous is documented with the beginning of the Pliocene. At 2.45 Ma the episodic occurrence of ice-rafted, thermally mature OM reflects the onset of the glacial erosion of Mesozoic, coal and black shale bearing sediments on the Scandinavian and Barents Sea shelves. The first occurrence of these, in view of the actual burial depth, thermally overmature OM particles is, therefore, a marker for the beginning of the strong Scandinavian glaciation and the advance of the glacial front toward the shelves. |
format |
Dataset |
author |
Hölemann, Jens A Henrich, Rüdiger |
author_facet |
Hölemann, Jens A Henrich, Rüdiger |
author_sort |
Hölemann, Jens A |
title |
(Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples |
title_short |
(Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples |
title_full |
(Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples |
title_fullStr |
(Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples |
title_full_unstemmed |
(Table 1) Maceral composition and organic carbon chemistry of ODP Leg 104 samples |
title_sort |
(table 1) maceral composition and organic carbon chemistry of odp leg 104 samples |
publisher |
PANGAEA |
publishDate |
1994 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.758978 https://doi.org/10.1594/PANGAEA.758978 |
op_coverage |
MEDIAN LATITUDE: 67.206100 * MEDIAN LONGITUDE: 2.846100 * SOUTH-BOUND LATITUDE: 66.678300 * WEST-BOUND LONGITUDE: 1.033300 * NORTH-BOUND LATITUDE: 67.715000 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1985-06-28T14:40:00 * DATE/TIME END: 1985-08-09T10:15:00 * MINIMUM ELEVATION: -2780.0 m * MAXIMUM ELEVATION: -1226.0 m |
long_lat |
ENVELOPE(4.000,4.000,67.000,67.000) ENVELOPE(1.033300,4.576700,67.715000,66.678300) |
geographic |
Barents Sea Norwegian Sea Vøring Plateau |
geographic_facet |
Barents Sea Norwegian Sea Vøring Plateau |
genre |
Barents Sea Norwegian Sea |
genre_facet |
Barents Sea Norwegian Sea |
op_source |
Supplement to: Hölemann, Jens A; Henrich, Rüdiger (1994): Allochthonous versus autochthonous organic matter in Cenozoic sediments of the Norwegian Sea: Evidence for the onset of glaciations in the northern hemisphere. Marine Geology, 121(1-2), 87-103, https://doi.org/10.1016/0025-3227(94)90159-7 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.758978 https://doi.org/10.1594/PANGAEA.758978 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.758978 https://doi.org/10.1016/0025-3227(94)90159-7 |
_version_ |
1766370703493300224 |