Paleomagnetic properties of ODP Hole 178-1101A

Sediments recovered from a drift deposit located on the Pacific side of the Antarctic Peninsula (ODP Leg 178, Site 1101) give a physical record of a bottom current, sourced from the Weddell Sea Deep Water, for the past 3 Ma. Sediment grain size and magnetic fabric analyses indicate a contourite depo...

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Bibliographic Details
Main Authors: Hassold, Noralynn J C, Rea, David K, van der Pluijm, Ben A, Parés, Josep M
Format: Other/Unknown Material
Language:English
Published: PANGAEA 2009
Subjects:
178-1101A
DRILL
Drilling/drill rig
Joides Resolution
Leg178
Ocean Drilling Program
ODP
South Pacific Ocean
Antarc*
Antarctic
Antarctic Peninsula
Ice cap
Ice Sheet
Weddell Sea
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.777736
https://doi.org/10.1594/PANGAEA.777736
Description
Summary:Sediments recovered from a drift deposit located on the Pacific side of the Antarctic Peninsula (ODP Leg 178, Site 1101) give a physical record of a bottom current, sourced from the Weddell Sea Deep Water, for the past 3 Ma. Sediment grain size and magnetic fabric analyses indicate a contourite depositional environment and little change in the average intensity of this current. Terrigenous fluxes decreased around the time of the onset of Northern Hemisphere Glaciation, which we interpret as a freezing of the base of the Antarctic Peninsula Ice Cap. Terrigenous fluxes have increased since 1.7 Ma implying a possible return of the Antarctic Peninsula Ice Cap to a more wet-based ice sheet.

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