Magnetostratigraphy and environmental magnetism of two Quaternary deep-sea gravity cores from the west Pacific Southern Ocean

• Published in: Geochemistry, Geophysics, Geosystems
• Main Authors: Venuti, A., Florindo, F.
• Other Authors: Venuti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
• Format: Article in Journal/Newspaper
• Language: English
• Published: AGU 2004
• Subjects: paleomagnetism; Quaternary; sedimentary cores; Southern Ocean; 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism; Antarctic; Italica; Pacific; The Antarctic; Antarc*
• Online Access: http://hdl.handle.net/2122/2890; https://doi.org/10.1029/2004GC000810

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. Published Q12011 2.2. Laboratorio di paleomagnetismo JCR Journal reserved