Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments
Sedimentation rates in many Arctic Ocean cores need to be determined using paleomagnetic variations, carbonate concentration and radiocarbon age determinations because there is often an insufficient supply of biogenic material for biostratigraphic determination. Using these methods in the eastern ba...
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ftdtic:ADA348839 2023-05-15T14:44:34+02:00 Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments Curry, William B. WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF GEOLOGY AND GEOPHYSICS 1998 text/html http://www.dtic.mil/docs/citations/ADA348839 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA348839 en eng http://www.dtic.mil/docs/citations/ADA348839 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Geology Geochemistry and Mineralogy *ISOTOPES *SEDIMENTATION STRATIGRAPHY MARINE GEOLOGY SEDIMENTS BASINS(GEOGRAPHIC) FOSSILS ARCTIC OCEAN RADIOCARBON DATING PALEOMAGNETISM Text 1998 ftdtic 2016-02-19T23:25:38Z Sedimentation rates in many Arctic Ocean cores need to be determined using paleomagnetic variations, carbonate concentration and radiocarbon age determinations because there is often an insufficient supply of biogenic material for biostratigraphic determination. Using these methods in the eastern basins, the sedimentation rates obtained are generally a few centimeters per thousand years, which is significantly higher than sedimentation rates within the western, Canadian Basin. In the western basin, where enough biogenic material is available for both radiocarbon age determination and stable isotopic analysis, sedimentation rates are about one order of magnitude lower. The oxygen isotopic records are highly variable, indicating that the records are affected significantly by melt water and riverine input. Missing stratigraphic sections and higher variability in oxygen isotopic composition preclude identifying the typical open ocean marine isotope stratigraphy. Sediments from the last glacial maximum (20ka) contain few fossils or are completely missing, implying that the Arctic may have been frozen year round during this extreme period of glaciation. Text Arctic Arctic Ocean Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean Western Basin |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Geology Geochemistry and Mineralogy *ISOTOPES *SEDIMENTATION STRATIGRAPHY MARINE GEOLOGY SEDIMENTS BASINS(GEOGRAPHIC) FOSSILS ARCTIC OCEAN RADIOCARBON DATING PALEOMAGNETISM |
spellingShingle |
Geology Geochemistry and Mineralogy *ISOTOPES *SEDIMENTATION STRATIGRAPHY MARINE GEOLOGY SEDIMENTS BASINS(GEOGRAPHIC) FOSSILS ARCTIC OCEAN RADIOCARBON DATING PALEOMAGNETISM Curry, William B. Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments |
topic_facet |
Geology Geochemistry and Mineralogy *ISOTOPES *SEDIMENTATION STRATIGRAPHY MARINE GEOLOGY SEDIMENTS BASINS(GEOGRAPHIC) FOSSILS ARCTIC OCEAN RADIOCARBON DATING PALEOMAGNETISM |
description |
Sedimentation rates in many Arctic Ocean cores need to be determined using paleomagnetic variations, carbonate concentration and radiocarbon age determinations because there is often an insufficient supply of biogenic material for biostratigraphic determination. Using these methods in the eastern basins, the sedimentation rates obtained are generally a few centimeters per thousand years, which is significantly higher than sedimentation rates within the western, Canadian Basin. In the western basin, where enough biogenic material is available for both radiocarbon age determination and stable isotopic analysis, sedimentation rates are about one order of magnitude lower. The oxygen isotopic records are highly variable, indicating that the records are affected significantly by melt water and riverine input. Missing stratigraphic sections and higher variability in oxygen isotopic composition preclude identifying the typical open ocean marine isotope stratigraphy. Sediments from the last glacial maximum (20ka) contain few fossils or are completely missing, implying that the Arctic may have been frozen year round during this extreme period of glaciation. |
author2 |
WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF GEOLOGY AND GEOPHYSICS |
format |
Text |
author |
Curry, William B. |
author_facet |
Curry, William B. |
author_sort |
Curry, William B. |
title |
Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments |
title_short |
Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments |
title_full |
Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments |
title_fullStr |
Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments |
title_full_unstemmed |
Isotopic Variation in Arctic Pleistocene and Pliocene Marine Sediments |
title_sort |
isotopic variation in arctic pleistocene and pliocene marine sediments |
publishDate |
1998 |
url |
http://www.dtic.mil/docs/citations/ADA348839 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA348839 |
geographic |
Arctic Arctic Ocean Western Basin |
geographic_facet |
Arctic Arctic Ocean Western Basin |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA348839 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
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1766316069484494848 |