(Table 1) Age markers and errors for the last 1215 ka in IODP Exp302
Despite its importance in the global climate system, age-calibrated marine geologic records reflecting the evolution of glacial cycles through the Pleistocene are largely absent from the central Arctic Ocean. This is especially true for sediments older than 200 ka. Three sites cored during the Integ...
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Format: | Dataset |
Language: | English |
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PANGAEA
2010
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.733880 https://doi.org/10.1594/PANGAEA.733880 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.733880 |
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openpolar |
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Open Polar |
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PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
302-CompSite Age comment maximum/old minimum/young Age model Arctic Coring Expedition ACEX Calculated see reference(s) COMPCORE Composite Core Datum level DEPTH sediment/rock Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP see comment Vidar Viking |
spellingShingle |
302-CompSite Age comment maximum/old minimum/young Age model Arctic Coring Expedition ACEX Calculated see reference(s) COMPCORE Composite Core Datum level DEPTH sediment/rock Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP see comment Vidar Viking O'Regan, Matthew King, John W Backman, Jan Jakobsson, Martin Pälike, Heiko Moran, Kathryn Heil, Chip Sakamoto, Tatsuhiko Cronin, Thomas M Jordan, Richard William (Table 1) Age markers and errors for the last 1215 ka in IODP Exp302 |
topic_facet |
302-CompSite Age comment maximum/old minimum/young Age model Arctic Coring Expedition ACEX Calculated see reference(s) COMPCORE Composite Core Datum level DEPTH sediment/rock Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP see comment Vidar Viking |
description |
Despite its importance in the global climate system, age-calibrated marine geologic records reflecting the evolution of glacial cycles through the Pleistocene are largely absent from the central Arctic Ocean. This is especially true for sediments older than 200 ka. Three sites cored during the Integrated Ocean Drilling Program's Expedition 302, the Arctic Coring Expedition (ACEX), provide a 27 m continuous sedimentary section from the Lomonosov Ridge in the central Arctic Ocean. Two key biostratigraphic datums and constraints from the magnetic inclination data are used to anchor the chronology of these sediments back to the base of the Cobb Mountain subchron (1215 ka). Beyond 1215 ka, two best fitting geomagnetic models are used to investigate the nature of cyclostratigraphic change. Within this chronology we show that bulk and mineral magnetic properties of the sediments vary on predicted Milankovitch frequencies. These cyclic variations record ''glacial'' and ''interglacial'' modes of sediment deposition on the Lomonosov Ridge as evident in studies of ice-rafted debris and stable isotopic and faunal assemblages for the last two glacial cycles and were used to tune the age model. Potential errors, which largely arise from uncertainties in the nature of downhole paleomagnetic variability, and the choice of a tuning target are handled by defining an error envelope that is based on the best fitting cyclostratigraphic and geomagnetic solutions. |
format |
Dataset |
author |
O'Regan, Matthew King, John W Backman, Jan Jakobsson, Martin Pälike, Heiko Moran, Kathryn Heil, Chip Sakamoto, Tatsuhiko Cronin, Thomas M Jordan, Richard William |
author_facet |
O'Regan, Matthew King, John W Backman, Jan Jakobsson, Martin Pälike, Heiko Moran, Kathryn Heil, Chip Sakamoto, Tatsuhiko Cronin, Thomas M Jordan, Richard William |
author_sort |
O'Regan, Matthew |
title |
(Table 1) Age markers and errors for the last 1215 ka in IODP Exp302 |
title_short |
(Table 1) Age markers and errors for the last 1215 ka in IODP Exp302 |
title_full |
(Table 1) Age markers and errors for the last 1215 ka in IODP Exp302 |
title_fullStr |
(Table 1) Age markers and errors for the last 1215 ka in IODP Exp302 |
title_full_unstemmed |
(Table 1) Age markers and errors for the last 1215 ka in IODP Exp302 |
title_sort |
(table 1) age markers and errors for the last 1215 ka in iodp exp302 |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.733880 https://doi.org/10.1594/PANGAEA.733880 |
op_coverage |
LATITUDE: 87.890000 * LONGITUDE: 137.650000 * MINIMUM DEPTH, sediment/rock: 0.00 m * MAXIMUM DEPTH, sediment/rock: 16.23 m |
long_lat |
ENVELOPE(137.650000,137.650000,87.890000,87.890000) |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Lomonosov Ridge |
genre_facet |
Arctic Arctic Arctic Ocean Lomonosov Ridge |
op_relation |
https://doi.org/10.1594/PANGAEA.832427 O'Regan, Matthew; King, John W; Backman, Jan; Jakobsson, Martin; Pälike, Heiko; Moran, Kathryn; Heil, Chip; Sakamoto, Tatsuhiko; Cronin, Thomas M; Jordan, Richard William (2008): Constraints on the Pleistocene chronology of sediments from the Lomonosov Ridge. Paleoceanography, 23(1), PA1S19, https://doi.org/10.1029/2007PA001551 Cronin, Thomas M; Smith, Shannon A; Eynaud, Frédérique; O'Regan, Matthew; King, John W (2008): Quaternary paleoceanography of the central Arctic based on Integrated Ocean Drilling Program Arctic Coring Expedition 302 foraminiferal assemblages. Paleoceanography, 23(1), PA1S18, https://doi.org/10.1029/2007PA001484 Lund, Steven P; Stoner, Joseph S; Channell, James E T; Acton, Gary D (2006): A summary of Brunhes paleomagnetic field variability recorded in Ocean Drilling Program cores. Physics of The Earth and Planetary Interiors, 156(3-4), 194-204, https://doi.org/10.1016/j.pepi.2005.10.009 Martinson, Douglas G; Pisias, Nicklas G; Hays, James D; Imbrie, John D; Moore, Theodore C; Shackleton, Nicholas J (1987): Age Dating and the orbital theory of the ice ages: development of a high-resolution 0 to 300,000-year chronostratigraphy. Quaternary Research, 27, 1-29, https://doi.org/10.1016/0033-5894(87)90046-9 Nowaczyk, Norbert R; Frederichs, Thomas (1999): Geomagnetic events and relative palaeointensity variations during the past 300 ka as recorded in Kolbeinsey Ridge sediments, Iceland Sea: indication for a strongly variable geomagnetic field. International Journal of Earth Sciences, 88(1), 116-131, https://doi.org/10.1007/s005310050250 https://doi.pangaea.de/10.1594/PANGAEA.733880 https://doi.org/10.1594/PANGAEA.733880 |
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.733880 https://doi.org/10.1594/PANGAEA.832427 https://doi.org/10.1029/2007PA001551 https://doi.org/10.1029/2007PA001484 https://doi.org/10.1016/j.pepi.2005.10.009 https://doi.org/10.1016/0033-5894(87)90046-9 htt |
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1766302184251588608 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.733880 2023-05-15T14:28:03+02:00 (Table 1) Age markers and errors for the last 1215 ka in IODP Exp302 O'Regan, Matthew King, John W Backman, Jan Jakobsson, Martin Pälike, Heiko Moran, Kathryn Heil, Chip Sakamoto, Tatsuhiko Cronin, Thomas M Jordan, Richard William LATITUDE: 87.890000 * LONGITUDE: 137.650000 * MINIMUM DEPTH, sediment/rock: 0.00 m * MAXIMUM DEPTH, sediment/rock: 16.23 m 2010-02-16 text/tab-separated-values, 124 data points https://doi.pangaea.de/10.1594/PANGAEA.733880 https://doi.org/10.1594/PANGAEA.733880 en eng PANGAEA https://doi.org/10.1594/PANGAEA.832427 O'Regan, Matthew; King, John W; Backman, Jan; Jakobsson, Martin; Pälike, Heiko; Moran, Kathryn; Heil, Chip; Sakamoto, Tatsuhiko; Cronin, Thomas M; Jordan, Richard William (2008): Constraints on the Pleistocene chronology of sediments from the Lomonosov Ridge. Paleoceanography, 23(1), PA1S19, https://doi.org/10.1029/2007PA001551 Cronin, Thomas M; Smith, Shannon A; Eynaud, Frédérique; O'Regan, Matthew; King, John W (2008): Quaternary paleoceanography of the central Arctic based on Integrated Ocean Drilling Program Arctic Coring Expedition 302 foraminiferal assemblages. Paleoceanography, 23(1), PA1S18, https://doi.org/10.1029/2007PA001484 Lund, Steven P; Stoner, Joseph S; Channell, James E T; Acton, Gary D (2006): A summary of Brunhes paleomagnetic field variability recorded in Ocean Drilling Program cores. Physics of The Earth and Planetary Interiors, 156(3-4), 194-204, https://doi.org/10.1016/j.pepi.2005.10.009 Martinson, Douglas G; Pisias, Nicklas G; Hays, James D; Imbrie, John D; Moore, Theodore C; Shackleton, Nicholas J (1987): Age Dating and the orbital theory of the ice ages: development of a high-resolution 0 to 300,000-year chronostratigraphy. Quaternary Research, 27, 1-29, https://doi.org/10.1016/0033-5894(87)90046-9 Nowaczyk, Norbert R; Frederichs, Thomas (1999): Geomagnetic events and relative palaeointensity variations during the past 300 ka as recorded in Kolbeinsey Ridge sediments, Iceland Sea: indication for a strongly variable geomagnetic field. International Journal of Earth Sciences, 88(1), 116-131, https://doi.org/10.1007/s005310050250 https://doi.pangaea.de/10.1594/PANGAEA.733880 https://doi.org/10.1594/PANGAEA.733880 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY 302-CompSite Age comment maximum/old minimum/young Age model Arctic Coring Expedition ACEX Calculated see reference(s) COMPCORE Composite Core Datum level DEPTH sediment/rock Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP see comment Vidar Viking Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.733880 https://doi.org/10.1594/PANGAEA.832427 https://doi.org/10.1029/2007PA001551 https://doi.org/10.1029/2007PA001484 https://doi.org/10.1016/j.pepi.2005.10.009 https://doi.org/10.1016/0033-5894(87)90046-9 htt 2023-01-20T09:36:27Z Despite its importance in the global climate system, age-calibrated marine geologic records reflecting the evolution of glacial cycles through the Pleistocene are largely absent from the central Arctic Ocean. This is especially true for sediments older than 200 ka. Three sites cored during the Integrated Ocean Drilling Program's Expedition 302, the Arctic Coring Expedition (ACEX), provide a 27 m continuous sedimentary section from the Lomonosov Ridge in the central Arctic Ocean. Two key biostratigraphic datums and constraints from the magnetic inclination data are used to anchor the chronology of these sediments back to the base of the Cobb Mountain subchron (1215 ka). Beyond 1215 ka, two best fitting geomagnetic models are used to investigate the nature of cyclostratigraphic change. Within this chronology we show that bulk and mineral magnetic properties of the sediments vary on predicted Milankovitch frequencies. These cyclic variations record ''glacial'' and ''interglacial'' modes of sediment deposition on the Lomonosov Ridge as evident in studies of ice-rafted debris and stable isotopic and faunal assemblages for the last two glacial cycles and were used to tune the age model. Potential errors, which largely arise from uncertainties in the nature of downhole paleomagnetic variability, and the choice of a tuning target are handled by defining an error envelope that is based on the best fitting cyclostratigraphic and geomagnetic solutions. Dataset Arctic Arctic Arctic Ocean Lomonosov Ridge PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean ENVELOPE(137.650000,137.650000,87.890000,87.890000) |