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Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology Entry ID: NSF-ANT08-38729 |
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Summary
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Abstract:
Much of the inventory of East Antarctic bedrock geochronology, as well as a record of its erosional history, is preserved in Cenozoic sediments around its margin. This project is to use these sediments to understand their sub-ice provenance and the erosional history of the shield by measuring ages of multiple geo- and thermochronometers on single detrital crystals and on multiple crystals in detrital clasts (U/Pb, fission-track, and (U-Th)/He dating of zircon and apatite, and 40Ar/39Ar dating of hornblende, mica, and feldspar). The combination of multi-chronometer ages in single grains and clasts provides a powerful fingerprint of bedrock sources, allowing us to trace provenance in Eocene fluvial sandstones through Quaternary diamicts around the margin. Multiple thermochronometric (cooling) ages in the same grains and clasts also allows us to interpret the timing and rates of erosion from these bedrock sources. Delineating a distribution of bedrock age units, their sediment transport connections, and their erosional histories over the Cenozoic, will in turn allow us to test tectonic models bearing on: (1) the origin of the Gamburtsev Subglacial Mountains, (2) fluvial and topographic evolution, and (3) the history of glacial growth and erosion.
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Link:
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Description: Original data submitted Link: VIEW RELATED INFORMATION Description: NSF Award Abstract #0838729 |
Geographic Coverage
| N: -58.0 | S: -70.0 | E: 165.0 | W: -67.2 |
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Temporal Coverage
| Start Date: 2009-06-15 |
| Stop Date: 2011-05-31 |
Location Keywords
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OCEAN
> SOUTHERN OCEAN
CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR |
Science Keywords
| PALEOCLIMATE >OCEAN/LAKE RECORDS >SEDIMENTS [Definition] |
| SOLID EARTH >ROCKS/MINERALS/CRYSTALS >AGE DETERMINATIONS [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >ICEBERGS [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
| COMPLETE |
Data Center
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Data Coordination Center, United States Antarctic Program
[Information]
Data Center URL: http://www.usap-data.org/ Dataset ID: NSF-ANT08-38729
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Personnel
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SIDNEY
R
HEMMING Role: INVESTIGATOR Phone: 845-365-8417 Fax: 845-365-8155 Email: sidney at ldeo.columbia.edu Contact Address: Lamont-Doherty Earth Observatory 61 Rt. 9W City: Palisades Province or State: NY Postal Code: 10964 Country: USA |
Creation and Review Dates
DIF Creation Date:
2011-06-05
Last DIF Revision Date:
2011-06-06
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