Sedimentology and Lead and Strontium isotope ratios of Miocene sediments from the Kerguelen Plateau

Characterization of sediment from Ocean Drilling Program Site 745, representing the East Kerguelen Ridge sediment drift, addresses important issues surrounding the timing of Miocene to present East Antarctic ice sheet stability and oceanic environmental change. Our results show three periods of grea...

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Bibliographic Details
Main Authors: Joseph, Leah H, Rea, David K, van der Pluijm, Ben A, Gleason, James D
Format: Dataset
Language:English
Published: PANGAEA 2002
Subjects:
119-745
119-745B
COMPCORE
Composite Core
DRILL
Drilling/drill rig
Indian Ocean
Joides Resolution
Leg119
Ocean Drilling Program
ODP
Antarctic
East Antarctic Ice Sheet
Indian
Kerguelen
Kerguelen Ridge
Antarc*
Ice Sheet
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.713614
https://doi.org/10.1594/PANGAEA.713614
Description
Summary:Characterization of sediment from Ocean Drilling Program Site 745, representing the East Kerguelen Ridge sediment drift, addresses important issues surrounding the timing of Miocene to present East Antarctic ice sheet stability and oceanic environmental change. Our results show three periods of greatly enhanced accumulation of Antarctic-derived sediment, at 6.4-5.9 Ma, 4.9-4.4 Ma and 1.1-0.8 Ma, potentially indicative of warmer, less stable ice sheets at these times. Conversely, the accumulation of Antarctic-derived material is comparatively less during the middle of the Pliocene warm epoch (4.8-3.2 Ma). The deep flow forming the Kerguelen drift was stronger during the latest Miocene and earliest Pliocene and has decreased in intensity continuously since then.

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