Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390
Sediment samples from the Laptev Sea, taken during the 1993 RV Polarstern expedition ARK IX/4 and the RV Ivan Kireyev expedition TRANSDRIFT I, were investigated for the amount and composition of their organic carbon fractions. Of major interest was the identification of different processes controlli...
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ftdatacite:10.1594/pangaea.54605 2023-05-15T17:07:15+02:00 Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390 Fahl, Kirsten Stein, Ruediger 1997 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.54605 https://doi.pangaea.de/10.1594/PANGAEA.54605 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/s0146-6380(97)00007-7 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Carbon, organic, total Hydrogen index, mass HC per unit mass total organic carbon Long-chain n-alkanes, C27H56+C29H60+C31H64 per unit sediment mass Short-chain n-alkanes, C15H32+C17H36+C19H40 per unit sediment mass Box corer Reineck Water sample Giant box corer Element analyser CHN, LECO CNS 2000 Rock eval pyrolysis Behar et al., 2001 Gas chromatography Transdrift-I ARK-IX/4 Ivan Kireyev Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Quaternary Environment of the Eurasian North QUEEN Dataset dataset Supplementary Dataset 1997 ftdatacite https://doi.org/10.1594/pangaea.54605 https://doi.org/10.1016/s0146-6380(97)00007-7 2022-02-09T12:04:35Z Sediment samples from the Laptev Sea, taken during the 1993 RV Polarstern expedition ARK IX/4 and the RV Ivan Kireyev expedition TRANSDRIFT I, were investigated for the amount and composition of their organic carbon fractions. Of major interest was the identification of different processes controlling organic carbon deposition (i.e. terrigenous supply vs. surface water productivity). Long-chain unsaturated alkenones derived from prymnesiophytes, and fatty acids derived from diatoms and dinoflagellates, were analysed by means of gas chromatography and mass spectrometry. First results on the distribution of these biomarkers in surface sediments indicate that the surface water productivity signal is well preserved in the sediment data. This is shown by the distribution of the 16:1(n-7) and 20:5(n-3) fatty acids indicative for diatoms, and the excellent correlation with the chlorophyll a concentrations in the surface water masses and the biogenic-opal content and increased hydrogen indices of the sediments. The high concentration of these unsaturated fatty acids in shallow water sediments shows the recent deposition of the organic material. In deep-sea sediments, on the other hand, the concentrations are low. This decreased content is typical for phytoplankton material which has been degraded by microorganisms or autoxidation. In general, the alkenone concentrations are very low, suggesting low production rates by prymnesiophytes. Only at one station from the lower continental margin influenced by the inflow of Atlantic water masses, were some higher amounts of alkenones determined. Long-chain n-alkanes as well as high C/N ratios and low hydrogen indices indicate the importance of (fluvial) supply of terrigenous organic matter. Dataset laptev Laptev Sea DataCite Metadata Store (German National Library of Science and Technology) Laptev Sea |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Carbon, organic, total Hydrogen index, mass HC per unit mass total organic carbon Long-chain n-alkanes, C27H56+C29H60+C31H64 per unit sediment mass Short-chain n-alkanes, C15H32+C17H36+C19H40 per unit sediment mass Box corer Reineck Water sample Giant box corer Element analyser CHN, LECO CNS 2000 Rock eval pyrolysis Behar et al., 2001 Gas chromatography Transdrift-I ARK-IX/4 Ivan Kireyev Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Quaternary Environment of the Eurasian North QUEEN |
spellingShingle |
Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Carbon, organic, total Hydrogen index, mass HC per unit mass total organic carbon Long-chain n-alkanes, C27H56+C29H60+C31H64 per unit sediment mass Short-chain n-alkanes, C15H32+C17H36+C19H40 per unit sediment mass Box corer Reineck Water sample Giant box corer Element analyser CHN, LECO CNS 2000 Rock eval pyrolysis Behar et al., 2001 Gas chromatography Transdrift-I ARK-IX/4 Ivan Kireyev Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Quaternary Environment of the Eurasian North QUEEN Fahl, Kirsten Stein, Ruediger Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390 |
topic_facet |
Event label Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock Carbon, organic, total Hydrogen index, mass HC per unit mass total organic carbon Long-chain n-alkanes, C27H56+C29H60+C31H64 per unit sediment mass Short-chain n-alkanes, C15H32+C17H36+C19H40 per unit sediment mass Box corer Reineck Water sample Giant box corer Element analyser CHN, LECO CNS 2000 Rock eval pyrolysis Behar et al., 2001 Gas chromatography Transdrift-I ARK-IX/4 Ivan Kireyev Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Quaternary Environment of the Eurasian North QUEEN |
description |
Sediment samples from the Laptev Sea, taken during the 1993 RV Polarstern expedition ARK IX/4 and the RV Ivan Kireyev expedition TRANSDRIFT I, were investigated for the amount and composition of their organic carbon fractions. Of major interest was the identification of different processes controlling organic carbon deposition (i.e. terrigenous supply vs. surface water productivity). Long-chain unsaturated alkenones derived from prymnesiophytes, and fatty acids derived from diatoms and dinoflagellates, were analysed by means of gas chromatography and mass spectrometry. First results on the distribution of these biomarkers in surface sediments indicate that the surface water productivity signal is well preserved in the sediment data. This is shown by the distribution of the 16:1(n-7) and 20:5(n-3) fatty acids indicative for diatoms, and the excellent correlation with the chlorophyll a concentrations in the surface water masses and the biogenic-opal content and increased hydrogen indices of the sediments. The high concentration of these unsaturated fatty acids in shallow water sediments shows the recent deposition of the organic material. In deep-sea sediments, on the other hand, the concentrations are low. This decreased content is typical for phytoplankton material which has been degraded by microorganisms or autoxidation. In general, the alkenone concentrations are very low, suggesting low production rates by prymnesiophytes. Only at one station from the lower continental margin influenced by the inflow of Atlantic water masses, were some higher amounts of alkenones determined. Long-chain n-alkanes as well as high C/N ratios and low hydrogen indices indicate the importance of (fluvial) supply of terrigenous organic matter. |
format |
Dataset |
author |
Fahl, Kirsten Stein, Ruediger |
author_facet |
Fahl, Kirsten Stein, Ruediger |
author_sort |
Fahl, Kirsten |
title |
Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390 |
title_short |
Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390 |
title_full |
Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390 |
title_fullStr |
Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390 |
title_full_unstemmed |
Organic geochemistry on surface sediments from the Laptev Sea, supplement to: Fahl, Kirsten; Stein, Ruediger (1997): Modern organic carbon deposition in the Laptev Sea and the adjacent continental slope: surface water productivity vs. terrigenous input. Organic Geochemistry, 26(5-6), 379-390 |
title_sort |
organic geochemistry on surface sediments from the laptev sea, supplement to: fahl, kirsten; stein, ruediger (1997): modern organic carbon deposition in the laptev sea and the adjacent continental slope: surface water productivity vs. terrigenous input. organic geochemistry, 26(5-6), 379-390 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1997 |
url |
https://dx.doi.org/10.1594/pangaea.54605 https://doi.pangaea.de/10.1594/PANGAEA.54605 |
geographic |
Laptev Sea |
geographic_facet |
Laptev Sea |
genre |
laptev Laptev Sea |
genre_facet |
laptev Laptev Sea |
op_relation |
https://dx.doi.org/10.1016/s0146-6380(97)00007-7 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.54605 https://doi.org/10.1016/s0146-6380(97)00007-7 |
_version_ |
1766062611779026944 |