Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes
The sediment records from north and south of Denmark Strait (cores PS2644 and MD99-2323) and on the Kangerlussuaq Trough Mouth Fan (KTMF) (MD99-2260) are evaluated for the period 12 to 60 cal ka BP with the goal of evaluating: 1) the relative roles of the Greenland and Iceland Ice Sheets in sediment...
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Language: | English |
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2017
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Online Access: | http://hdl.handle.net/10400.1/13038 https://doi.org/10.1016/j.margeo.2017.07.003 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/13038 2023-05-15T16:00:37+02:00 Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes Andrews, J. T. Dunhill, G. Vogt, C. Voelker, Antje 2017-08 http://hdl.handle.net/10400.1/13038 https://doi.org/10.1016/j.margeo.2017.07.003 eng eng Elsevier info:eu-repo/grantAgreement/FCT/5876/147257/PT 0025-3227 http://hdl.handle.net/10400.1/13038 doi:10.1016/j.margeo.2017.07.003 restrictedAccess Ice-rafted debris East Greenland current North Atlantic Ocean Sea Heinrich layers Late Quaternary Younger Dryas Labrador Sea Southeast Greenland Size distributions Nordic Seas Greenland Ice Sheet Denmark Strait Marine isotopes stages 2 and 3 Quantitative XRD mineral assemblages Grain-size spectra Iceland Ice Sheet article 2017 ftunivalgarve https://doi.org/10.1016/j.margeo.2017.07.003 2022-05-30T08:48:50Z The sediment records from north and south of Denmark Strait (cores PS2644 and MD99-2323) and on the Kangerlussuaq Trough Mouth Fan (KTMF) (MD99-2260) are evaluated for the period 12 to 60 cal ka BP with the goal of evaluating: 1) the relative roles of the Greenland and Iceland Ice Sheets in sediment composition, 2) the processes of sediment supply, and 3) the relationship, if any, between the atmospheric derived ice core records and glacial marine sediment history. These questions were addressed using counts of coarse (> 2 mm) ice rafted debris (IRD), magnetic susceptibility, grain-size spectra, and sediment mineral composition. A significant difference in these variables occurred between MS3 and IVII52, with the latter showing small to modest abrupt changes in felsic and mafic minerals and in IRD, compared to larger and less variable changes during MIS2. The dominant bedrock source archived in the cores is the Cenozoic basaltic outcrops from East Greenland and Iceland (-60%) but there are frequent pulses of felsic-rich sediments (similar to 17-36%), which coincided with Greenland stadials. There is also a persistent detrital carbonate input. The largest shift in most sediment proxies occurred 28-30 cal ka BP reflecting the sustained expansion of the ice sheets. The grain-size spectra on the Snorri Drift (MD99-2323) reflected complex depositional histories involving the supply of poorly sorted glacially derived sediment (sand, silt, and clay) and reworking by bottom currents. National Science Foundation (NSF) [OCE-98-09001, OPP-0082347] Geological Society of America Graduate Student grants German Science Foundation (Deutsche Forschungsgemeinschaft/DFG) [SFB313] German Science Foundation (Deutsche Forschungsgemeinschaft/DFG) [Fi442/10-1, Fi442/10-2] CCMAR [UID/Multi/04326/2013] Article in Journal/Newspaper Denmark Strait East Greenland east greenland current Greenland ice core Ice Sheet Iceland Kangerlussuaq Labrador Sea Nordic Seas North Atlantic Universidade do Algarve: Sapienta Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Marine Geology 390 181 198 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Ice-rafted debris East Greenland current North Atlantic Ocean Sea Heinrich layers Late Quaternary Younger Dryas Labrador Sea Southeast Greenland Size distributions Nordic Seas Greenland Ice Sheet Denmark Strait Marine isotopes stages 2 and 3 Quantitative XRD mineral assemblages Grain-size spectra Iceland Ice Sheet |
spellingShingle |
Ice-rafted debris East Greenland current North Atlantic Ocean Sea Heinrich layers Late Quaternary Younger Dryas Labrador Sea Southeast Greenland Size distributions Nordic Seas Greenland Ice Sheet Denmark Strait Marine isotopes stages 2 and 3 Quantitative XRD mineral assemblages Grain-size spectra Iceland Ice Sheet Andrews, J. T. Dunhill, G. Vogt, C. Voelker, Antje Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes |
topic_facet |
Ice-rafted debris East Greenland current North Atlantic Ocean Sea Heinrich layers Late Quaternary Younger Dryas Labrador Sea Southeast Greenland Size distributions Nordic Seas Greenland Ice Sheet Denmark Strait Marine isotopes stages 2 and 3 Quantitative XRD mineral assemblages Grain-size spectra Iceland Ice Sheet |
description |
The sediment records from north and south of Denmark Strait (cores PS2644 and MD99-2323) and on the Kangerlussuaq Trough Mouth Fan (KTMF) (MD99-2260) are evaluated for the period 12 to 60 cal ka BP with the goal of evaluating: 1) the relative roles of the Greenland and Iceland Ice Sheets in sediment composition, 2) the processes of sediment supply, and 3) the relationship, if any, between the atmospheric derived ice core records and glacial marine sediment history. These questions were addressed using counts of coarse (> 2 mm) ice rafted debris (IRD), magnetic susceptibility, grain-size spectra, and sediment mineral composition. A significant difference in these variables occurred between MS3 and IVII52, with the latter showing small to modest abrupt changes in felsic and mafic minerals and in IRD, compared to larger and less variable changes during MIS2. The dominant bedrock source archived in the cores is the Cenozoic basaltic outcrops from East Greenland and Iceland (-60%) but there are frequent pulses of felsic-rich sediments (similar to 17-36%), which coincided with Greenland stadials. There is also a persistent detrital carbonate input. The largest shift in most sediment proxies occurred 28-30 cal ka BP reflecting the sustained expansion of the ice sheets. The grain-size spectra on the Snorri Drift (MD99-2323) reflected complex depositional histories involving the supply of poorly sorted glacially derived sediment (sand, silt, and clay) and reworking by bottom currents. National Science Foundation (NSF) [OCE-98-09001, OPP-0082347] Geological Society of America Graduate Student grants German Science Foundation (Deutsche Forschungsgemeinschaft/DFG) [SFB313] German Science Foundation (Deutsche Forschungsgemeinschaft/DFG) [Fi442/10-1, Fi442/10-2] CCMAR [UID/Multi/04326/2013] |
format |
Article in Journal/Newspaper |
author |
Andrews, J. T. Dunhill, G. Vogt, C. Voelker, Antje |
author_facet |
Andrews, J. T. Dunhill, G. Vogt, C. Voelker, Antje |
author_sort |
Andrews, J. T. |
title |
Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes |
title_short |
Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes |
title_full |
Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes |
title_fullStr |
Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes |
title_full_unstemmed |
Denmark Strait during the Late Glacial Maximum and marine isotope stage 3: sediment sources and transport processes |
title_sort |
denmark strait during the late glacial maximum and marine isotope stage 3: sediment sources and transport processes |
publisher |
Elsevier |
publishDate |
2017 |
url |
http://hdl.handle.net/10400.1/13038 https://doi.org/10.1016/j.margeo.2017.07.003 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Denmark Strait East Greenland east greenland current Greenland ice core Ice Sheet Iceland Kangerlussuaq Labrador Sea Nordic Seas North Atlantic |
genre_facet |
Denmark Strait East Greenland east greenland current Greenland ice core Ice Sheet Iceland Kangerlussuaq Labrador Sea Nordic Seas North Atlantic |
op_relation |
info:eu-repo/grantAgreement/FCT/5876/147257/PT 0025-3227 http://hdl.handle.net/10400.1/13038 doi:10.1016/j.margeo.2017.07.003 |
op_rights |
restrictedAccess |
op_doi |
https://doi.org/10.1016/j.margeo.2017.07.003 |
container_title |
Marine Geology |
container_volume |
390 |
container_start_page |
181 |
op_container_end_page |
198 |
_version_ |
1766396617915629568 |