Search Help
Did you find what you were looking for? Yes No
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

[ Get Data ]

Summary
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.

Related URL
Link: GET DATA
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

Temporal Coverage
Start Date: 2009-07-01
Stop Date: 2010-06-30


Location Keywords
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
GEOSCIENTIFIC INFORMATION


Project
NSF/PLR >Division of Polar Programs, National Science Foundation    [Information]


Data Set Progress
IN WORK


Data Center
Department of Earth & Environmental Studies, Montclair State University    [Information]
Data Center URL: http://csam.montclair.edu/earth/

Data Center Personnel
Name: SANDRA PASSCHIER
Email: passchiers at mail.montclair.edu
Contact Address:
Montclair State University
City: Montclair
Province or State: NJ
Postal Code: 07043
Country: US


United States Antarctic Program Data Center    [Information]
Data Center URL: http://www.usap-data.org/
Dataset ID: NSF-ANT08-38842

Data Center Personnel
Name: ROBERT A. ARKO
Email: info at usap-data.org
Contact Address:
Lamont-Doherty Earth Observatory
61 Route 9W
City: Palisades
Province or State: NY
Postal Code: 10964
Country: USA


Personnel
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: 2010-08-27
Last DIF Revision Date: 2016-01-27



Link to Web Site