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Determining Middle Miocene through Pliocene Changes in Paleo Ice-flow and Basal Ice Conditions in East Antarctica through Sedimentological Analyses of Core Samples Entry ID: NSF-ANT08-38842 |
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Summary
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Abstract:
This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The project aims on studying sediment cores collected from Prydz Bay and the Ross Sea to unravel the Neogene paleoclimatic history of the East Antarctic ice sheet. In the light of current measurements and predictions of a substantial rise in global temperature, investigations into the sensitivity of the East Antarctic ice sheet to climate change and its role in the climate system are essential. Geological records of former periods of climate change provide an opportunity to ground truth model predictions. The scientific objective of this project is to identify a previously proposed middle Miocene transition from a more dynamic wet-based East Antarctic ice sheet to the present semi-permanent ice sheet that is partially frozen to its bed. The timing and significance of this transition is controversial due to a lack of quantitative studies on well-dated ice-proximal sedimentary sequences. This project partially fills that gap using the composition and physical properties of diamictites and sandstones to establish shifts in ice-sheet drainage pathways, paleoenvironments and basal ice conditions. The results from the two key areas around the Antarctic continental margin will provide insight into the behavior of the East Antarctic ice sheet across the middle Miocene transition and through known times of warming in the late Miocene and Pliocene. This dataset constitutes laser particle size analyses and major and trace element geochemistry of samples by ICP-OES from diamictites in the AND-2A and CRP cores. |
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Link:
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Description: Data to be published as M.S. thesis. Link: VIEW RELATED INFORMATION Description: NSF Award Abstract #0838842 |
Geographic Coverage
| N: -68.0 | S: -78.0 | E: -150.0 | W: 160.0 |
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Temporal Coverage
| Start Date: 2009-07-01 |
| Stop Date: 2010-06-30 |
Location Keywords
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CONTINENT
> ANTARCTICA
GEOGRAPHIC REGION > POLAR VERTICAL LOCATION > SEA FLOOR OCEAN > SOUTHERN OCEAN > ROSS SEA |
Science Keywords
| OCEANS >MARINE SEDIMENTS >SEDIMENT COMPOSITION [Definition] |
| OCEANS >MARINE SEDIMENTS >TERRIGENOUS SEDIMENTS [Definition] |
| PALEOCLIMATE >OCEAN/LAKE RECORDS >SEDIMENTS [Definition] |
| OCEANS >MARINE SEDIMENTS >SEDIMENT CHEMISTRY [Definition] |
ISO Topic Category
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GEOSCIENTIFIC INFORMATION
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Project
| NSF/OPP >Office of Polar Programs, National Science Foundation [Information] |
Data Set Progress
| IN WORK |
Data Center
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Department of Earth & Environmental Studies, Montclair State University
[Information]
Data Center URL: http://csam.montclair.edu/earth/
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Data Coordination Center, United States Antarctic Program
[Information]
Data Center URL: http://www.usap-data.org/ Dataset ID: NSF-ANT08-38842
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Personnel
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SANDRA
PASSCHIER Role: INVESTIGATOR Email: passchiers at mail.montclair.edu Contact Address: Montclair State University City: Montclair Province or State: NJ Postal Code: 07043 Country: US |
Creation and Review Dates
DIF Creation Date:
2006-06-26
Last DIF Revision Date:
2009-01-22
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