Sedimenary Processes in the Wilkes Land Margin: A Record of Cenozoic East Antarctic Ice Sheet Evolution
Multichannel seismic data collected off Wilkes Land (East Antarctica) reveal four main units that represent distinct phases in the evolution of the Cenozoic depositional environment. A Cretaceous synrift succession is overlain by hemipelagic and distal terrigenous sequences deposited during Phase 1. Sediment ridges and debris-flow deposits mark the transition to Phase 2. Unit 3 records the maximum sediment input from the continent and is characterized by the predominance of turbidite deposits. During Phase 4 the sediment supply from the continental margin was reduced, and draping and filling were the dominant processes on the continental rise. Unit 4 also contains the deposits of sediment wave fields and asymmetric channel-levee systems. These four units are a response to the Cenozoic evolution of the East Antarctic Ice Sheet. During Phase 1, small ice caps were formed in the innermost continental areas. The ice volume increased under temperate glacial regimes during Phases 2 and 3, when large volumes of melt-water production led to high sediment discharge to the continental rise. Change to a polar regime occurred through Phase 4, when a thick prograding wedge developed on the continental shelf and slope and the sediment transport to the rise diminished, producing general starvation conditions.
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Identification info
- Date (Publication)
- 2007-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/70222
- Citation identifier
- Digital Object Identifier/http://dx.doi.org/10.1144/0016-76492004-159
- Cited responsible party
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Role Organisation / Individual Name Details Author Donda, F.
1 Author Brancolini, G.
2 Author O'Brien, P.E.
3 Author De Santis, L.
4 Author Escutia, C.
5
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164
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Role Organisation / Individual Name Details Custodian EGD
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
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- Geoscientific information
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))
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- Unknown
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External Publication
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Scientific Journal Paper
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- Theme
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Antarctic data
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- Theme
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sedimentology
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- Theme
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marine
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- Keywords
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AQ
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- Australian and New Zealand Standard Research Classification (ANZSRC)
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Earth Sciences
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- Keywords
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Published_External
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Creative Commons Attribution 4.0 International Licence
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CC-BY
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4.0
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
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- Unclassified
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- English
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
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Unknown
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- Non geographic dataset
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External Publication
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Source data not available.
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- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
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Metadata
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urn:uuid/a05f7892-f6b3-7506-e044-00144fdd4fa6
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GeoNetwork UUID
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
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nonGeographicDataset
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/70222
- Date info (Revision)
- 2018-04-22T08:49:27
- Date info (Creation)
- 2010-03-16T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
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ISO 19115-3
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551