Sedimentology of core PS1423-2
Investigations of the stratigraphy and facies within a 2.69m long gravity core (PS1423-2) from the southwestern Weddell Sea, Antarctica, indicate a significant change in the character of glaciomarine sedimentation since grounded ice withdrew from the continental shelf. Based On visual description, X...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.51746 2023-05-15T13:29:43+02:00 Sedimentology of core PS1423-2 Crawford, Kevin Richard Kuhn, Gerhard Hambrey, Mike J LATITUDE: -74.701660 * LONGITUDE: -61.320000 * DATE/TIME START: 1986-02-10T11:38:00 * DATE/TIME END: 1986-02-10T11:38:00 * MINIMUM DEPTH, sediment/rock: 0.01 m * MAXIMUM DEPTH, sediment/rock: 2.65 m 1996-12-05 text/tab-separated-values, 145 data points https://doi.pangaea.de/10.1594/PANGAEA.51746 https://doi.org/10.1594/PANGAEA.51746 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.51746 https://doi.org/10.1594/PANGAEA.51746 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Crawford, Kevin Richard; Kuhn, Gerhard; Hambrey, Mike J (1996): Changes in the character of glaciomarine sedimentation in the southwestern Weddell Sea, Antarctica: evidence from the core PS1423-2. Annals of Glaciology, 22, 200-204, hdl:10013/epic.11142.d001 ANT-IV/3 AWI_Paleo Calcium carbonate Calculated Cape Fiske Carbon organic total Density wet bulk DEPTH sediment/rock Element analyser CHN LECO Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern Porosity PS08 PS08/450 PS1423-2 Pycnometer (Micromeritics) SL Dataset 1996 ftpangaea https://doi.org/10.1594/PANGAEA.51746 2023-01-20T07:35:24Z Investigations of the stratigraphy and facies within a 2.69m long gravity core (PS1423-2) from the southwestern Weddell Sea, Antarctica, indicate a significant change in the character of glaciomarine sedimentation since grounded ice withdrew from the continental shelf. Based On visual description, X-radiography, clast shape, particle-size analysis, physical properties and geochemical data, the core used in this analysis comprises five distinct units, from top to bottom: (i) massive diamicton, (ii) weakly to well-stratified diamicton, (iii) millimetre-scale laminated muds, with little or no coarse-clastic input, (iv) well- to weakly stratified diamicton, (V) massive diamicton. This succession is attributed to the variation in sedimentation associated with the recession of the grounding line of a previously advanced glacier. Grounded ice decoupled from the continental shelf to form an ice shelf, probably initiated by a rise in sea level in response to global climatic changes. Following disintegration of the ice shelf, sedimentation was influenced by marked variations in iceberg production. AMS derived 14C ages from the upper 46 cm of the core indicate that the succession has been deposited since the end of the most recent glacial maximum (late Plektocene), a conclusion supported by published data. Dataset Annals of Glaciology Antarc* Antarctica Ice Shelf Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Weddell Sea Weddell Cape Fiske ENVELOPE(-60.650,-60.650,-74.283,-74.283) ENVELOPE(-61.320000,-61.320000,-74.701660,-74.701660) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-IV/3 AWI_Paleo Calcium carbonate Calculated Cape Fiske Carbon organic total Density wet bulk DEPTH sediment/rock Element analyser CHN LECO Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern Porosity PS08 PS08/450 PS1423-2 Pycnometer (Micromeritics) SL |
spellingShingle |
ANT-IV/3 AWI_Paleo Calcium carbonate Calculated Cape Fiske Carbon organic total Density wet bulk DEPTH sediment/rock Element analyser CHN LECO Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern Porosity PS08 PS08/450 PS1423-2 Pycnometer (Micromeritics) SL Crawford, Kevin Richard Kuhn, Gerhard Hambrey, Mike J Sedimentology of core PS1423-2 |
topic_facet |
ANT-IV/3 AWI_Paleo Calcium carbonate Calculated Cape Fiske Carbon organic total Density wet bulk DEPTH sediment/rock Element analyser CHN LECO Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern Porosity PS08 PS08/450 PS1423-2 Pycnometer (Micromeritics) SL |
description |
Investigations of the stratigraphy and facies within a 2.69m long gravity core (PS1423-2) from the southwestern Weddell Sea, Antarctica, indicate a significant change in the character of glaciomarine sedimentation since grounded ice withdrew from the continental shelf. Based On visual description, X-radiography, clast shape, particle-size analysis, physical properties and geochemical data, the core used in this analysis comprises five distinct units, from top to bottom: (i) massive diamicton, (ii) weakly to well-stratified diamicton, (iii) millimetre-scale laminated muds, with little or no coarse-clastic input, (iv) well- to weakly stratified diamicton, (V) massive diamicton. This succession is attributed to the variation in sedimentation associated with the recession of the grounding line of a previously advanced glacier. Grounded ice decoupled from the continental shelf to form an ice shelf, probably initiated by a rise in sea level in response to global climatic changes. Following disintegration of the ice shelf, sedimentation was influenced by marked variations in iceberg production. AMS derived 14C ages from the upper 46 cm of the core indicate that the succession has been deposited since the end of the most recent glacial maximum (late Plektocene), a conclusion supported by published data. |
format |
Dataset |
author |
Crawford, Kevin Richard Kuhn, Gerhard Hambrey, Mike J |
author_facet |
Crawford, Kevin Richard Kuhn, Gerhard Hambrey, Mike J |
author_sort |
Crawford, Kevin Richard |
title |
Sedimentology of core PS1423-2 |
title_short |
Sedimentology of core PS1423-2 |
title_full |
Sedimentology of core PS1423-2 |
title_fullStr |
Sedimentology of core PS1423-2 |
title_full_unstemmed |
Sedimentology of core PS1423-2 |
title_sort |
sedimentology of core ps1423-2 |
publisher |
PANGAEA |
publishDate |
1996 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.51746 https://doi.org/10.1594/PANGAEA.51746 |
op_coverage |
LATITUDE: -74.701660 * LONGITUDE: -61.320000 * DATE/TIME START: 1986-02-10T11:38:00 * DATE/TIME END: 1986-02-10T11:38:00 * MINIMUM DEPTH, sediment/rock: 0.01 m * MAXIMUM DEPTH, sediment/rock: 2.65 m |
long_lat |
ENVELOPE(-60.650,-60.650,-74.283,-74.283) ENVELOPE(-61.320000,-61.320000,-74.701660,-74.701660) |
geographic |
Weddell Sea Weddell Cape Fiske |
geographic_facet |
Weddell Sea Weddell Cape Fiske |
genre |
Annals of Glaciology Antarc* Antarctica Ice Shelf Weddell Sea |
genre_facet |
Annals of Glaciology Antarc* Antarctica Ice Shelf Weddell Sea |
op_source |
Supplement to: Crawford, Kevin Richard; Kuhn, Gerhard; Hambrey, Mike J (1996): Changes in the character of glaciomarine sedimentation in the southwestern Weddell Sea, Antarctica: evidence from the core PS1423-2. Annals of Glaciology, 22, 200-204, hdl:10013/epic.11142.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.51746 https://doi.org/10.1594/PANGAEA.51746 |
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.51746 |
_version_ |
1766002407544717312 |