CaCO3, foraminifer fragmentation, benthic carbon isotopes, coarse lithic counts and radiogenic isotopes (Sr, Nd, Pb) of the Pliocene and earliest Pleistocene terrigenous component (3.3-2.4 Ma) of IODP Site 306-U1313 ...

• Main Authors: Lang, David C, Bailey, Ian, Wilson, Paul A, Beer, Christopher J, Bolton, Clara T, Friedrich, Oliver, Newsam, Cherry, Spencer, Megan R, Gutjahr, Marcus, Foster, Gavin L, Cooper, Matthew J, Milton, J Andy
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2014
• Subjects: Composite Core; Exp306; Joides Resolution; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Bolton; Milton; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.829428; https://doi.pangaea.de/10.1594/PANGAEA.829428

We present Plio-Pleistocene records of sediment color, %CaCO3, foraminifer fragmentation, benthic carbon isotopes (d13C) and radiogenic isotopes (Sr, Nd, Pb) of the terrigenous component from IODP Site U1313, a reoccupation of benchmark subtropical North Atlantic Ocean DSDP Site 607. We show that (inter)glacial cycles in sediment color and %CaCO3 pre-date major northern hemisphere glaciation and are unambiguously and consistently correlated to benthic oxygen isotopes back to 3.3 million years ago (Ma) and intermittently so probably back to the Miocene/Pliocene boundary. We show these lithological cycles to be driven by enhanced glacial fluxes of terrigenous material (eolian dust), not carbonate dissolution (the classic interpretation). Our radiogenic isotope data indicate a North American source for this dust (~3.3-2.4 Ma) in keeping with the interpreted source of terrestrial plant wax-derived biomarkers deposited at Site U1313. Yet our data indicate a mid latitude provenance regardless of (inter)glacial ... : Supplement to: Lang, David C; Bailey, Ian; Wilson, Paul A; Beer, Christopher J; Bolton, Clara T; Friedrich, Oliver; Newsam, Cherry; Spencer, Megan R; Gutjahr, Marcus; Foster, Gavin L; Cooper, Matthew J; Milton, J Andy (2014): The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site. Quaternary Science Reviews, 93, 125-141 ...