Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus
During the "RV Polarstem"-Expedition ARK VIII/2 sediment samples were obtained at the continentalslope of NW-Spitsbergen. Detailed sedimentological and geochemical analysis were carriedout at two undisturbed box cores (PS2122-1GKG, PS2123-2GKG) as well as two gravity cores(PS2122-1SL, PS21...
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ftoceanrep:oai:oceanrep.geomar.de:28327 2023-05-15T16:22:16+02:00 Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus Knies, Jochen 1994 text https://oceanrep.geomar.de/id/eprint/28327/ https://oceanrep.geomar.de/id/eprint/28327/1/Kni1994a.pdf de ger https://oceanrep.geomar.de/id/eprint/28327/1/Kni1994a.pdf Knies, J. (1994) Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus. Open Access (Diploma thesis), Universität Giessen, Giessen, Germany, 95 pp. cc_by_3.0 info:eu-repo/semantics/openAccess Thesis NonPeerReviewed 1994 ftoceanrep 2023-04-07T15:18:33Z During the "RV Polarstem"-Expedition ARK VIII/2 sediment samples were obtained at the continentalslope of NW-Spitsbergen. Detailed sedimentological and geochemical analysis were carriedout at two undisturbed box cores (PS2122-1GKG, PS2123-2GKG) as well as two gravity cores(PS2122-1SL, PS2123-2SL). The following parameters were deterrnined: Organic carbon, nitrogenand carbonate contents, hydrogen index, stable isotopes, ice rafted debris, grain-size distribution andbiogenic opal. The main objective of this study was the reconstruction of paleoenvironmental changes off thenorthwest coast of Spitsbergen during the last glacial/interglacial-cycle, i.e., during the last about128.000 years.The results of the investigations can be summarized as follows:- During isotope stage 1 (Holocene) and 5.5 (Eemian Interglacial), light stable isotopes (8180: 3,4-2%0; 8BC: 0,26-0,5 %0), increased bioturbation, high content of planktonic foraminifera andbiogenic opal and low quantity of ice-rafted material, indicate seasonally ice-free conditions alongthe northwest coast due to the int1uence of the Westspitsbergen Current.- Additionally, the sediment characteristics of the middle of isotope stage 2 (Last Glacial Maximum)and at the end of stage 3 confirms an inflow of warmer Atlantic water. The highest production ofplanktonic and benthic foraminifera (N. pachyderma sin., Cassidulina teretis) (CaC03: 10 %) mayret1ect the expansion of the "Whalers Bay"-Polynya as a result of the int1uence of the WestspitsbergenCurrent. Presumably, occasionally open-ice conditions provide sufficient precipitation to buildupthe Svalbard/Barents Ice Sheet.- The time intervals for the glacier advances on Svalbard given by Mangerud et al. (1992), can becorrelated with increased accumulation of ice-rafted material in the sediments at the northwest coastof Spitsbergen. Especially during isotope stage 4 and at the beginning of the Last Glacial Maximum(isotope stage 2), a drastically increased supply of coarse terrigenous material occurs. The highaccumulation ... Thesis glacier Ice Sheet Planktonic foraminifera Svalbard Spitsbergen OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Svalbard Whalers Bay ENVELOPE(69.917,69.917,-49.100,-49.100) |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
German |
description |
During the "RV Polarstem"-Expedition ARK VIII/2 sediment samples were obtained at the continentalslope of NW-Spitsbergen. Detailed sedimentological and geochemical analysis were carriedout at two undisturbed box cores (PS2122-1GKG, PS2123-2GKG) as well as two gravity cores(PS2122-1SL, PS2123-2SL). The following parameters were deterrnined: Organic carbon, nitrogenand carbonate contents, hydrogen index, stable isotopes, ice rafted debris, grain-size distribution andbiogenic opal. The main objective of this study was the reconstruction of paleoenvironmental changes off thenorthwest coast of Spitsbergen during the last glacial/interglacial-cycle, i.e., during the last about128.000 years.The results of the investigations can be summarized as follows:- During isotope stage 1 (Holocene) and 5.5 (Eemian Interglacial), light stable isotopes (8180: 3,4-2%0; 8BC: 0,26-0,5 %0), increased bioturbation, high content of planktonic foraminifera andbiogenic opal and low quantity of ice-rafted material, indicate seasonally ice-free conditions alongthe northwest coast due to the int1uence of the Westspitsbergen Current.- Additionally, the sediment characteristics of the middle of isotope stage 2 (Last Glacial Maximum)and at the end of stage 3 confirms an inflow of warmer Atlantic water. The highest production ofplanktonic and benthic foraminifera (N. pachyderma sin., Cassidulina teretis) (CaC03: 10 %) mayret1ect the expansion of the "Whalers Bay"-Polynya as a result of the int1uence of the WestspitsbergenCurrent. Presumably, occasionally open-ice conditions provide sufficient precipitation to buildupthe Svalbard/Barents Ice Sheet.- The time intervals for the glacier advances on Svalbard given by Mangerud et al. (1992), can becorrelated with increased accumulation of ice-rafted material in the sediments at the northwest coastof Spitsbergen. Especially during isotope stage 4 and at the beginning of the Last Glacial Maximum(isotope stage 2), a drastically increased supply of coarse terrigenous material occurs. The highaccumulation ... |
format |
Thesis |
author |
Knies, Jochen |
spellingShingle |
Knies, Jochen Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus |
author_facet |
Knies, Jochen |
author_sort |
Knies, Jochen |
title |
Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus |
title_short |
Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus |
title_full |
Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus |
title_fullStr |
Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus |
title_full_unstemmed |
Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus |
title_sort |
spätquartäre sedimentation am kontinentalhang nordwestlich spitzbergens : der letzte glazial/interglazial-zyklus |
publishDate |
1994 |
url |
https://oceanrep.geomar.de/id/eprint/28327/ https://oceanrep.geomar.de/id/eprint/28327/1/Kni1994a.pdf |
long_lat |
ENVELOPE(69.917,69.917,-49.100,-49.100) |
geographic |
Svalbard Whalers Bay |
geographic_facet |
Svalbard Whalers Bay |
genre |
glacier Ice Sheet Planktonic foraminifera Svalbard Spitsbergen |
genre_facet |
glacier Ice Sheet Planktonic foraminifera Svalbard Spitsbergen |
op_relation |
https://oceanrep.geomar.de/id/eprint/28327/1/Kni1994a.pdf Knies, J. (1994) Spätquartäre Sedimentation am Kontinentalhang nordwestlich Spitzbergens : der letzte Glazial/Interglazial-Zyklus. Open Access (Diploma thesis), Universität Giessen, Giessen, Germany, 95 pp. |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
_version_ |
1766010237268000768 |