Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core ...

• Main Authors: Luigi, Jovane, Florindo, Fabio, Acton, Gary D, Ohneiser, Christian, Sagnotti, Leonardo, Strada, Eleonora, Verosub, Kenneth Lee, Wilson, Gary S, Iacoviello, Francesco, Levy, Richard H, Passchier, Sandra
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2019
• Subjects: AND-2A; ANDRILL; Antarctica; Early Miocene; magnetic properties; Ross Sea; Southern McMurdo Sound; volcanoes; Drilling/drill rig; SMS; McMurdo Station; Antarctic Geological Drilling ANDRILL; Antarc*; Antarctic; McMurdo Sound
• Online Access: https://dx.doi.org/10.1594/pangaea.897964; https://doi.pangaea.de/10.1594/PANGAEA.897964

During the 2007 ANDRILL campaign in the Ross Sea, Antarctica, the AND-2A core was recovered through a stratigraphic succession spanning 1138.54 m of Neogene sedimentary rocks that include an expanded Early to Middle Miocene sequence. The study reported here focuses on the magnetic properties of the interval from 778.63 meters below sea floor (mbsf) to 1138.54 mbsf, which comprises a time interval spanning 1.5 Myr, from ~18.7 to ~20.2 Ma. We recognise three main pulses of increased input of magnetic materials to the drill site between 778.34 - 903.06, 950.55 - 995.78 and 1040 - 1103.96 mbsf. Trends in magnetic mineral concentration dependent parameters mirror changes in the proportion of sediments derived from McMurdo Volcanic Group rocks. We suggest these pulses in magnetic mineral concentration reflect changes in sediment transport processes associated with changing glacial conditions at the drill site that included (1) subglacial and grounding zone proximal settings, (2) hemipelagic and neritic conditions ... : Supplement to: Jovane, Luigi; Florindo, Fabio; Acton, Gary D; Ohneiser, Christian; Sagnotti, Leonardo; Strada, Eleonora; Verosub, Kenneth Lee; Wilson, Gary S; Iacoviello, Francesco; Levy, Richard H; Passchier, Sandra (2019): Miocene Glacial Dynamics Recorded by Variations in Magnetic Properties in the ANDRILL‐2A Drill Core. Journal of Geophysical Research: Solid Earth, 124(3), 2297-2312 ...