Age tie points and geochemistry of sediment cores from the Antarctic continental margin
Few high-latitude terrestrial records document the timing and nature of the Cenozoic "Greenhouse" to "Icehouse" transition. Here we exploit the bulk geochemistry of marine siliciclastic sediments from drill cores on Antarctica's continental margin to extract a unique semiqua...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.816896 2024-09-15T17:42:02+00:00 Age tie points and geochemistry of sediment cores from the Antarctic continental margin Passchier, Sandra Bohaty, Steven M Jiménez-Espejo, Francisco Jose Pross, Jörg Röhl, Ursula van de Flierdt, Tina Escutia Dotti, Carlota Brinkhuis, Henk MEDIAN LATITUDE: -73.101220 * MEDIAN LONGITUDE: 138.572807 * SOUTH-BOUND LATITUDE: -77.930000 * WEST-BOUND LONGITUDE: 74.786930 * NORTH-BOUND LATITUDE: -63.310230 * EAST-BOUND LONGITUDE: 166.540000 * DATE/TIME START: 1986-10-15T00:00:00 * DATE/TIME END: 2000-02-21T16:00:00 2013 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.816896 https://doi.org/10.1594/PANGAEA.816896 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.816896 https://doi.org/10.1594/PANGAEA.816896 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Passchier, Sandra; Bohaty, Steven M; Jiménez-Espejo, Francisco Jose; Pross, Jörg; Röhl, Ursula; van de Flierdt, Tina; Escutia Dotti, Carlota; Brinkhuis, Henk (2013): Early Eocene to middle Miocene cooling and aridification of East Antarctica. Geochemistry, Geophysics, Geosystems, 14, https://doi.org/10.1002/ggge.20106 Cape Roberts Project CRP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP dataset publication series 2013 ftpangaea https://doi.org/10.1594/PANGAEA.81689610.1002/ggge.20106 2024-07-24T02:31:21Z Few high-latitude terrestrial records document the timing and nature of the Cenozoic "Greenhouse" to "Icehouse" transition. Here we exploit the bulk geochemistry of marine siliciclastic sediments from drill cores on Antarctica's continental margin to extract a unique semiquantitative temperature and precipitation record for Eocene to mid-Miocene (~54-13 Ma). Alkaline elements are strongly enriched in the detrital mineral fraction in fine-grained siliciclastic marine sediments and only occur as trace metals in the biogenic fraction. Hence, terrestrial climofunctions similar to the chemical index of alteration (CIA) can be applied to the alkaline major element geochemistry of marine sediments on continental margins in order to reconstruct changes in precipitation and temperature. We validate this approach by comparison with published paleotemperature and precipitation records derived from fossil wood, leaves, and pollen and find remarkable agreement, despite uncertainties in the calibrations of the different proxies. A long-term cooling on the order of >=8°C is observed between the Early Eocene Climatic Optimum (~54-52 Ma) and the middle Miocene (~15-13 Ma) with the onset of transient cooling episodes in the middle Eocene at ~46-45 Ma. High-latitude stratigraphic records currently exhibit insufficient temporal resolution to reconstruct continental aridity and inferred ice-sheet development during the middle to late Eocene (~45-37 Ma). However, we find an abrupt aridification of East Antarctica near the Eocene-Oligocene transition (~34 Ma), which suggests that ice coverage influenced high-latitude atmospheric circulation patterns through albedo effects from the earliest Oligocene onward. Other/Unknown Material Antarc* Antarctic Antarctica East Antarctica Ice Sheet PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(74.786930,166.540000,-63.310230,-77.930000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Cape Roberts Project CRP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP |
spellingShingle |
Cape Roberts Project CRP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP Passchier, Sandra Bohaty, Steven M Jiménez-Espejo, Francisco Jose Pross, Jörg Röhl, Ursula van de Flierdt, Tina Escutia Dotti, Carlota Brinkhuis, Henk Age tie points and geochemistry of sediment cores from the Antarctic continental margin |
topic_facet |
Cape Roberts Project CRP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP |
description |
Few high-latitude terrestrial records document the timing and nature of the Cenozoic "Greenhouse" to "Icehouse" transition. Here we exploit the bulk geochemistry of marine siliciclastic sediments from drill cores on Antarctica's continental margin to extract a unique semiquantitative temperature and precipitation record for Eocene to mid-Miocene (~54-13 Ma). Alkaline elements are strongly enriched in the detrital mineral fraction in fine-grained siliciclastic marine sediments and only occur as trace metals in the biogenic fraction. Hence, terrestrial climofunctions similar to the chemical index of alteration (CIA) can be applied to the alkaline major element geochemistry of marine sediments on continental margins in order to reconstruct changes in precipitation and temperature. We validate this approach by comparison with published paleotemperature and precipitation records derived from fossil wood, leaves, and pollen and find remarkable agreement, despite uncertainties in the calibrations of the different proxies. A long-term cooling on the order of >=8°C is observed between the Early Eocene Climatic Optimum (~54-52 Ma) and the middle Miocene (~15-13 Ma) with the onset of transient cooling episodes in the middle Eocene at ~46-45 Ma. High-latitude stratigraphic records currently exhibit insufficient temporal resolution to reconstruct continental aridity and inferred ice-sheet development during the middle to late Eocene (~45-37 Ma). However, we find an abrupt aridification of East Antarctica near the Eocene-Oligocene transition (~34 Ma), which suggests that ice coverage influenced high-latitude atmospheric circulation patterns through albedo effects from the earliest Oligocene onward. |
format |
Other/Unknown Material |
author |
Passchier, Sandra Bohaty, Steven M Jiménez-Espejo, Francisco Jose Pross, Jörg Röhl, Ursula van de Flierdt, Tina Escutia Dotti, Carlota Brinkhuis, Henk |
author_facet |
Passchier, Sandra Bohaty, Steven M Jiménez-Espejo, Francisco Jose Pross, Jörg Röhl, Ursula van de Flierdt, Tina Escutia Dotti, Carlota Brinkhuis, Henk |
author_sort |
Passchier, Sandra |
title |
Age tie points and geochemistry of sediment cores from the Antarctic continental margin |
title_short |
Age tie points and geochemistry of sediment cores from the Antarctic continental margin |
title_full |
Age tie points and geochemistry of sediment cores from the Antarctic continental margin |
title_fullStr |
Age tie points and geochemistry of sediment cores from the Antarctic continental margin |
title_full_unstemmed |
Age tie points and geochemistry of sediment cores from the Antarctic continental margin |
title_sort |
age tie points and geochemistry of sediment cores from the antarctic continental margin |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.816896 https://doi.org/10.1594/PANGAEA.816896 |
op_coverage |
MEDIAN LATITUDE: -73.101220 * MEDIAN LONGITUDE: 138.572807 * SOUTH-BOUND LATITUDE: -77.930000 * WEST-BOUND LONGITUDE: 74.786930 * NORTH-BOUND LATITUDE: -63.310230 * EAST-BOUND LONGITUDE: 166.540000 * DATE/TIME START: 1986-10-15T00:00:00 * DATE/TIME END: 2000-02-21T16:00:00 |
long_lat |
ENVELOPE(74.786930,166.540000,-63.310230,-77.930000) |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_source |
Supplement to: Passchier, Sandra; Bohaty, Steven M; Jiménez-Espejo, Francisco Jose; Pross, Jörg; Röhl, Ursula; van de Flierdt, Tina; Escutia Dotti, Carlota; Brinkhuis, Henk (2013): Early Eocene to middle Miocene cooling and aridification of East Antarctica. Geochemistry, Geophysics, Geosystems, 14, https://doi.org/10.1002/ggge.20106 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.816896 https://doi.org/10.1594/PANGAEA.816896 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81689610.1002/ggge.20106 |
_version_ |
1810488383299911680 |