Paleomagnetic and age determination for three drill cores from southern Victoria Land, Antarctica ...

• Main Authors: Ohneiser, Christian, Wilson, Gary S
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Drilling/drill rig; CIROS; DVDP; Sampling/drilling ice; Sampling on land; International Polar Year 2007-2008 IPY; Antarc*; Antarctic; Antarctica; International Polar Year; IPY; Victoria Land
• Online Access: https://dx.doi.org/10.1594/pangaea.771469; https://doi.pangaea.de/10.1594/PANGAEA.771469

The Taylor Valley (DVDP-10, -11) and Ferrar Fiord (CIROS-2) drill cores offer a window into the evolution of southern Victoria Land glaciers and the Antarctic climate system during the late-Neogene. Here we present new magnetostratigraphic chronologies, which we use to correlate the drill core successions with onshore dry-valleys geomorphic records and offshore deep-ocean records. Magnetostratigraphies were constructed using stepwise AF and/or thermal demagnetisation of discrete specimens from the drill cores. Correlation of magnetostratigraphies with the magnetic polarity timescale was guided by biostratigraphic and radiometric constraints. We recognise five styles of sedimentation in the Taylor/Ferrar fiords, which we correlate with discrete climate phases. During the latest Miocene-early Pliocene, wet based glaciers filled the Taylor and Ferrar fiords with active sedimentation in the Taylor Fiord and erosion of basement rocks in the Ferrar Fiord. Glaciers retreated during the Pliocene warm period leaving ... : Data included in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...