(Table 1) Summary of general lithology in IODP Exp302 cores
The Cenozoic ice-rafted debris (IRD) history of the central Arctic is reconstructed utilizing the terrigenous coarse sand fraction in IODP 302 cores from 0 to 273 meters composite depth. This Holocene - middle Eocene quantitative record of terrigenous sand accumulation on the Lomonosov Ridge, along...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.734547 2023-05-15T13:41:32+02:00 (Table 1) Summary of general lithology in IODP Exp302 cores St. John, Kristen E Kudless LATITUDE: 87.890000 * LONGITUDE: 137.650000 * MINIMUM ELEVATION: -1251.0 m * MAXIMUM ELEVATION: -1251.0 m 2010-03-04 text/tab-separated-values, 41 data points https://doi.pangaea.de/10.1594/PANGAEA.734547 https://doi.org/10.1594/PANGAEA.734547 en eng PANGAEA St. John, Kristen E Kudless (2008): Cenozoic ice-rafting history of the central Arctic Ocean: Terrigenous sands on the Lomonosov Ridge. Paleoceanography, 23, PA1S05, https://doi.org/10.1029/2007PA001483 https://doi.pangaea.de/10.1594/PANGAEA.734547 https://doi.org/10.1594/PANGAEA.734547 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY 302-CompSite Age maximum/old minimum/young Arctic Coring Expedition ACEX Calculated Comment COMPCORE Composite Core Density dry bulk Depth composite revised bottom composite revised top Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Lithology/composition/facies Sample comment Sedimentation rate see comment Vidar Viking Visual description Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.734547 https://doi.org/10.1029/2007PA001483 2023-01-20T08:49:45Z The Cenozoic ice-rafted debris (IRD) history of the central Arctic is reconstructed utilizing the terrigenous coarse sand fraction in IODP 302 cores from 0 to 273 meters composite depth. This Holocene - middle Eocene quantitative record of terrigenous sand accumulation on the Lomonosov Ridge, along with qualitative information on grain texture and composition, confirms the interpretation that ice initiation (sea ice and glacial ice) occurred ~46 Ma in the Arctic, and provides a long-term pattern of Arctic ice expansion and decay since the middle Eocene. IRD mass accumulation rates range from 0 to 0.13 g/cm2/ka in the middle Eocene and from 0 to 0.36 g/cm2/ka in the Neogene. IRD mass accumulation rate (MAR) maxima in the Miocene and Pliocene cooccur with either glacial initiation or intensification in the sub-Arctic. The 46.25 Ma IRD onset in the central Arctic slightly precedes the earliest evidence of ice in the Antarctic, and compares in timing with a >1000 ppm decrease in atmospheric concentrations of CO2. The decline of pCO2 in the middle Eocene may have driven both poles across the temperature threshold that enabled the nucleation of glaciers on land and partial freezing of the surface Arctic Ocean, especially during times of low insolation. Dataset Antarc* Antarctic Arctic Arctic Arctic Ocean Lomonosov Ridge Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic The Antarctic Arctic Ocean ENVELOPE(137.650000,137.650000,87.890000,87.890000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
302-CompSite Age maximum/old minimum/young Arctic Coring Expedition ACEX Calculated Comment COMPCORE Composite Core Density dry bulk Depth composite revised bottom composite revised top Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Lithology/composition/facies Sample comment Sedimentation rate see comment Vidar Viking Visual description |
spellingShingle |
302-CompSite Age maximum/old minimum/young Arctic Coring Expedition ACEX Calculated Comment COMPCORE Composite Core Density dry bulk Depth composite revised bottom composite revised top Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Lithology/composition/facies Sample comment Sedimentation rate see comment Vidar Viking Visual description St. John, Kristen E Kudless (Table 1) Summary of general lithology in IODP Exp302 cores |
topic_facet |
302-CompSite Age maximum/old minimum/young Arctic Coring Expedition ACEX Calculated Comment COMPCORE Composite Core Density dry bulk Depth composite revised bottom composite revised top Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Lithology/composition/facies Sample comment Sedimentation rate see comment Vidar Viking Visual description |
description |
The Cenozoic ice-rafted debris (IRD) history of the central Arctic is reconstructed utilizing the terrigenous coarse sand fraction in IODP 302 cores from 0 to 273 meters composite depth. This Holocene - middle Eocene quantitative record of terrigenous sand accumulation on the Lomonosov Ridge, along with qualitative information on grain texture and composition, confirms the interpretation that ice initiation (sea ice and glacial ice) occurred ~46 Ma in the Arctic, and provides a long-term pattern of Arctic ice expansion and decay since the middle Eocene. IRD mass accumulation rates range from 0 to 0.13 g/cm2/ka in the middle Eocene and from 0 to 0.36 g/cm2/ka in the Neogene. IRD mass accumulation rate (MAR) maxima in the Miocene and Pliocene cooccur with either glacial initiation or intensification in the sub-Arctic. The 46.25 Ma IRD onset in the central Arctic slightly precedes the earliest evidence of ice in the Antarctic, and compares in timing with a >1000 ppm decrease in atmospheric concentrations of CO2. The decline of pCO2 in the middle Eocene may have driven both poles across the temperature threshold that enabled the nucleation of glaciers on land and partial freezing of the surface Arctic Ocean, especially during times of low insolation. |
format |
Dataset |
author |
St. John, Kristen E Kudless |
author_facet |
St. John, Kristen E Kudless |
author_sort |
St. John, Kristen E Kudless |
title |
(Table 1) Summary of general lithology in IODP Exp302 cores |
title_short |
(Table 1) Summary of general lithology in IODP Exp302 cores |
title_full |
(Table 1) Summary of general lithology in IODP Exp302 cores |
title_fullStr |
(Table 1) Summary of general lithology in IODP Exp302 cores |
title_full_unstemmed |
(Table 1) Summary of general lithology in IODP Exp302 cores |
title_sort |
(table 1) summary of general lithology in iodp exp302 cores |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.734547 https://doi.org/10.1594/PANGAEA.734547 |
op_coverage |
LATITUDE: 87.890000 * LONGITUDE: 137.650000 * MINIMUM ELEVATION: -1251.0 m * MAXIMUM ELEVATION: -1251.0 m |
long_lat |
ENVELOPE(137.650000,137.650000,87.890000,87.890000) |
geographic |
Arctic Antarctic The Antarctic Arctic Ocean |
geographic_facet |
Arctic Antarctic The Antarctic Arctic Ocean |
genre |
Antarc* Antarctic Arctic Arctic Arctic Ocean Lomonosov Ridge Sea ice |
genre_facet |
Antarc* Antarctic Arctic Arctic Arctic Ocean Lomonosov Ridge Sea ice |
op_relation |
St. John, Kristen E Kudless (2008): Cenozoic ice-rafting history of the central Arctic Ocean: Terrigenous sands on the Lomonosov Ridge. Paleoceanography, 23, PA1S05, https://doi.org/10.1029/2007PA001483 https://doi.pangaea.de/10.1594/PANGAEA.734547 https://doi.org/10.1594/PANGAEA.734547 |
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.734547 https://doi.org/10.1029/2007PA001483 |
_version_ |
1766152028337209344 |