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| Titel |
From the greenhouse to the icehouse in the Antarctic Wilkes Land margin: IODP Expedition 318 |
| VerfasserIn |
C. Escutia, H. Brinkhuis, R. Dunbar, A. Klaus |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250070111
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| Zusammenfassung |
| IODP Expedition 318 drilled seven sites in two transects across the Wilkes Land margin of
Antarctica. The objective was to obtain a long-term record of the Cenozoic Antarctic
glaciation, including the greenhouse-icehouse transition, and its intimate relationships with
global climatic and oceanographic change. Expedition 318 recovered ~2000 m of middle
Eocene–Holocene sediments spanning ~53 million years of Antarctic history. The cores
reveal the history of the Wilkes Land Antarctic margin from an ice-free “greenhouse”
Antarctica, to the first cooling, to the onset and erosional consequences of the first glaciation
and the subsequent dynamics of the waxing and waning ice sheets, all the way to
thick, unprecedented “tree ring style” records with seasonal resolution of the last
deglaciation that began ~10,000 y ago. The cores also reveal details of the tectonic
history of the Australo-Antarctic Gulf from 53 Ma portraying the onset of the second
phase of rifting between Australia and Antarctica, to ever subsiding margins and
deepening, to the present continental and ever widening ocean/continent configuration. |
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