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Magnetostratigraphy and environmental magnetism of two Quaternary deep-sea gravity cores from the west Pacific Southern Ocean
Language
English
Obiettivo Specifico
2.2. Laboratorio di paleomagnetismo
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
5 / 12 (2004)
Publisher
AGU
Pages (printed)
Q12011
Issued date
2004
Abstract
We present new paleomagnetic data for Quaternary u channel samples from two deep-sea gravity cores
from the west Pacific Southern Ocean. These cores were recovered in the Antarctic summers 1995–1996
during the oceanographic cruise of the R/V Italica. One was recovered beneath the present-day Antarctic
Polar Front (Anta 95-157), and the other is from within the Antarctic Zone (Anta 96-16). The Matuyama-
Brunhes boundary has been identified in both cores, with a longer history of sedimentation available in
Anta 96-16. A detailed rock magnetic study shows discrete occurrences of ice rafted debris, which were
influenced by 100-kyr orbital eccentricity variations during the Brunhes Chron. This is consistent with the
main periodicity of the climate system since the mid-Pleistocene climate transition.
from the west Pacific Southern Ocean. These cores were recovered in the Antarctic summers 1995–1996
during the oceanographic cruise of the R/V Italica. One was recovered beneath the present-day Antarctic
Polar Front (Anta 95-157), and the other is from within the Antarctic Zone (Anta 96-16). The Matuyama-
Brunhes boundary has been identified in both cores, with a longer history of sedimentation available in
Anta 96-16. A detailed rock magnetic study shows discrete occurrences of ice rafted debris, which were
influenced by 100-kyr orbital eccentricity variations during the Brunhes Chron. This is consistent with the
main periodicity of the climate system since the mid-Pleistocene climate transition.
Type
article
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