Sedimentological and geochemical investigation of Denmark Strait sediments
Geophysical data from the Kangerlussuaq Trough, E Greenland (Dowdeswell et al., 2010; Stein, 1996), and from the West Iceland shelf (Syvitski et al., 1999) indicate that there are sites where pre Last Glacial Maximum (LGM) sediments exist, but no such sites have been successfully cored. However, a s...
Main Authors: | , , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2017
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.874909 https://doi.org/10.1594/PANGAEA.874909 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.874909 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.874909 2023-05-15T16:00:38+02:00 Sedimentological and geochemical investigation of Denmark Strait sediments Andrews, John T Cabedo-Sanz, Patricia Jennings, Anne E Olafasdottir, Saedis Belt, Simon T Geirsdóttir, Áslaug MEDIAN LATITUDE: 66.771832 * MEDIAN LONGITUDE: -25.700612 * SOUTH-BOUND LATITUDE: 63.963167 * WEST-BOUND LONGITUDE: -30.966000 * NORTH-BOUND LATITUDE: 68.103000 * EAST-BOUND LONGITUDE: -17.905280 * DATE/TIME START: 1990-01-01T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 2017-04-28 application/zip, 9 datasets https://doi.pangaea.de/10.1594/PANGAEA.874909 https://doi.org/10.1594/PANGAEA.874909 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.874909 https://doi.org/10.1594/PANGAEA.874909 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; Cabedo-Sanz, Patricia; Jennings, Anne E; Olafasdottir, Saedis; Belt, Simon T; Geirsdóttir, Áslaug (2017): Sea ice, ice-rafting, and ocean climate across Denmark Strait during rapid deglaciation (~16 to 12 cal ka BP) of the Iceland and East Greenland shelves. Journal of Quaternary Science, https://doi.org/10.1002/jqs.3007 Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.874909 https://doi.org/10.1002/jqs.3007 2023-01-20T07:33:56Z Geophysical data from the Kangerlussuaq Trough, E Greenland (Dowdeswell et al., 2010; Stein, 1996), and from the West Iceland shelf (Syvitski et al., 1999) indicate that there are sites where pre Last Glacial Maximum (LGM) sediments exist, but no such sites have been successfully cored. However, a significant number of cores have been recovered that penetrate a basal diamicton, sometimes containing shells and foraminifera, and which are overlain by glacial marine sediments rich in ice rafted debris (IRD) (Jennings et al., 2000; Olafsdottir, 2004). At the LGM, reconstructions and marine field data (Andrews, 2008; Andrews et al., 1998, 2000; Dunhill, 2005; Funder et al., 2004; Hubbard et al., 2006; Vasskog et al., 2015) indicate that the Iceland and Greenland ice sheets were terminating at their shelf breaks with deposition on the slopes above the Denmark Strait. Active sediment deposition ceased on the Kangerlussuaq Trough Mouth Fan (KTMF) ca. 15.3 ka 14C BP (Andrews et al., 1998; Dunhill, 2005) and retreat to the present coastline occurred prior to deposition of the Vedde tephra (Jennings et al., 2006). There is strong evidence that a major change in deep-water circulation at ~15 cal ka BP resulted in abrupt warming at the onset of the Bølling/Allerød (B/A) interstadial (Thiagarajan et al., 2014; Thornalley et al., 2011). Syvitski et al (1999) and Norddahl and Ingolfsson (2015) argued that the Iceland Ice Sheet retreated rapidly during this time, driven by a rapid rise in relative sea level. Jennings et al. (2006) also presented radiocarbon evidence from marine cores for a rapid retreat of the Greenland Ice Sheet along Kangerlussuaq Trough (KT, Fig. 1). Dataset Denmark Strait Greenland Ice Sheet Iceland Kangerlussuaq PANGAEA - Data Publisher for Earth & Environmental Science Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Jennings ENVELOPE(72.556,72.556,-70.145,-70.145) Vasskog ENVELOPE(23.524,23.524,70.023,70.023) ENVELOPE(-30.966000,-17.905280,68.103000,63.963167) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
Geophysical data from the Kangerlussuaq Trough, E Greenland (Dowdeswell et al., 2010; Stein, 1996), and from the West Iceland shelf (Syvitski et al., 1999) indicate that there are sites where pre Last Glacial Maximum (LGM) sediments exist, but no such sites have been successfully cored. However, a significant number of cores have been recovered that penetrate a basal diamicton, sometimes containing shells and foraminifera, and which are overlain by glacial marine sediments rich in ice rafted debris (IRD) (Jennings et al., 2000; Olafsdottir, 2004). At the LGM, reconstructions and marine field data (Andrews, 2008; Andrews et al., 1998, 2000; Dunhill, 2005; Funder et al., 2004; Hubbard et al., 2006; Vasskog et al., 2015) indicate that the Iceland and Greenland ice sheets were terminating at their shelf breaks with deposition on the slopes above the Denmark Strait. Active sediment deposition ceased on the Kangerlussuaq Trough Mouth Fan (KTMF) ca. 15.3 ka 14C BP (Andrews et al., 1998; Dunhill, 2005) and retreat to the present coastline occurred prior to deposition of the Vedde tephra (Jennings et al., 2006). There is strong evidence that a major change in deep-water circulation at ~15 cal ka BP resulted in abrupt warming at the onset of the Bølling/Allerød (B/A) interstadial (Thiagarajan et al., 2014; Thornalley et al., 2011). Syvitski et al (1999) and Norddahl and Ingolfsson (2015) argued that the Iceland Ice Sheet retreated rapidly during this time, driven by a rapid rise in relative sea level. Jennings et al. (2006) also presented radiocarbon evidence from marine cores for a rapid retreat of the Greenland Ice Sheet along Kangerlussuaq Trough (KT, Fig. 1). |
format |
Dataset |
author |
Andrews, John T Cabedo-Sanz, Patricia Jennings, Anne E Olafasdottir, Saedis Belt, Simon T Geirsdóttir, Áslaug |
spellingShingle |
Andrews, John T Cabedo-Sanz, Patricia Jennings, Anne E Olafasdottir, Saedis Belt, Simon T Geirsdóttir, Áslaug Sedimentological and geochemical investigation of Denmark Strait sediments |
author_facet |
Andrews, John T Cabedo-Sanz, Patricia Jennings, Anne E Olafasdottir, Saedis Belt, Simon T Geirsdóttir, Áslaug |
author_sort |
Andrews, John T |
title |
Sedimentological and geochemical investigation of Denmark Strait sediments |
title_short |
Sedimentological and geochemical investigation of Denmark Strait sediments |
title_full |
Sedimentological and geochemical investigation of Denmark Strait sediments |
title_fullStr |
Sedimentological and geochemical investigation of Denmark Strait sediments |
title_full_unstemmed |
Sedimentological and geochemical investigation of Denmark Strait sediments |
title_sort |
sedimentological and geochemical investigation of denmark strait sediments |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.874909 https://doi.org/10.1594/PANGAEA.874909 |
op_coverage |
MEDIAN LATITUDE: 66.771832 * MEDIAN LONGITUDE: -25.700612 * SOUTH-BOUND LATITUDE: 63.963167 * WEST-BOUND LONGITUDE: -30.966000 * NORTH-BOUND LATITUDE: 68.103000 * EAST-BOUND LONGITUDE: -17.905280 * DATE/TIME START: 1990-01-01T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(72.556,72.556,-70.145,-70.145) ENVELOPE(23.524,23.524,70.023,70.023) ENVELOPE(-30.966000,-17.905280,68.103000,63.963167) |
geographic |
Greenland Kangerlussuaq Jennings Vasskog |
geographic_facet |
Greenland Kangerlussuaq Jennings Vasskog |
genre |
Denmark Strait Greenland Ice Sheet Iceland Kangerlussuaq |
genre_facet |
Denmark Strait Greenland Ice Sheet Iceland Kangerlussuaq |
op_source |
Supplement to: Andrews, John T; Cabedo-Sanz, Patricia; Jennings, Anne E; Olafasdottir, Saedis; Belt, Simon T; Geirsdóttir, Áslaug (2017): Sea ice, ice-rafting, and ocean climate across Denmark Strait during rapid deglaciation (~16 to 12 cal ka BP) of the Iceland and East Greenland shelves. Journal of Quaternary Science, https://doi.org/10.1002/jqs.3007 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.874909 https://doi.org/10.1594/PANGAEA.874909 |
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.874909 https://doi.org/10.1002/jqs.3007 |
_version_ |
1766396645147148288 |