Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait
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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.876078 2023-05-15T16:00:38+02:00 Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait Andrews, John T Dunhill, Gita Vogt, Christoph Voelker, Antje H L MEDIAN LATITUDE: 65.821280 * MEDIAN LONGITUDE: -27.250907 * SOUTH-BOUND LATITUDE: 64.905000 * WEST-BOUND LONGITUDE: -30.250000 * NORTH-BOUND LATITUDE: 67.868333 * EAST-BOUND LONGITUDE: -21.758333 * DATE/TIME START: 1994-09-19T06:44:00 * DATE/TIME END: 1999-08-01T00:00:00 2017-06-09 application/zip, 16 datasets https://doi.pangaea.de/10.1594/PANGAEA.876078 https://doi.org/10.1594/PANGAEA.876078 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.876078 https://doi.org/10.1594/PANGAEA.876078 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Andrews, John T; Dunhill, Gita; Vogt, Christoph; Voelker, Antje H L (2017): Denmark Strait during the Late Glacial Maximum and Marine Isotope Stage 3: Sediment sources and transport processes. Marine Geology, 390, 181-198, https://doi.org/10.1016/j.margeo.2017.07.003 Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.876078 https://doi.org/10.1016/j.margeo.2017.07.003 2023-01-20T07:33:57Z 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 MIS2, 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 (~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. Dataset Denmark Strait East Greenland Greenland ice core Iceland Kangerlussuaq PANGAEA - Data Publisher for Earth & Environmental Science Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(-30.250000,-21.758333,67.868333,64.905000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
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 MIS2, 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 (~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. |
format |
Dataset |
author |
Andrews, John T Dunhill, Gita Vogt, Christoph Voelker, Antje H L |
spellingShingle |
Andrews, John T Dunhill, Gita Vogt, Christoph Voelker, Antje H L Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait |
author_facet |
Andrews, John T Dunhill, Gita Vogt, Christoph Voelker, Antje H L |
author_sort |
Andrews, John T |
title |
Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait |
title_short |
Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait |
title_full |
Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait |
title_fullStr |
Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait |
title_full_unstemmed |
Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait |
title_sort |
age determination, bulk mineral assemblage and sedimentology of sediment cores north and south of the denmark strait |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.876078 https://doi.org/10.1594/PANGAEA.876078 |
op_coverage |
MEDIAN LATITUDE: 65.821280 * MEDIAN LONGITUDE: -27.250907 * SOUTH-BOUND LATITUDE: 64.905000 * WEST-BOUND LONGITUDE: -30.250000 * NORTH-BOUND LATITUDE: 67.868333 * EAST-BOUND LONGITUDE: -21.758333 * DATE/TIME START: 1994-09-19T06:44:00 * DATE/TIME END: 1999-08-01T00:00:00 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(-30.250000,-21.758333,67.868333,64.905000) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Denmark Strait East Greenland Greenland ice core Iceland Kangerlussuaq |
genre_facet |
Denmark Strait East Greenland Greenland ice core Iceland Kangerlussuaq |
op_source |
Supplement to: Andrews, John T; Dunhill, Gita; Vogt, Christoph; Voelker, Antje H L (2017): Denmark Strait during the Late Glacial Maximum and Marine Isotope Stage 3: Sediment sources and transport processes. Marine Geology, 390, 181-198, https://doi.org/10.1016/j.margeo.2017.07.003 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.876078 https://doi.org/10.1594/PANGAEA.876078 |
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.876078 https://doi.org/10.1016/j.margeo.2017.07.003 |
_version_ |
1766396639919996928 |