Rockmagnetic investigations of IODP Site U1302-U1303 ...

• Main Authors: Channell, James E T, Hodell, David A, Romero, Oscar E, Hillaire-Marcel, Claude, de Vernal, Anne, Stoner, Joseph S, Mazaud, Alain, Röhl, Ursula
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Composite Core; Exp303; Joides Resolution; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Orphan Knoll; Romero; Ice Sheet; Labrador Sea; Neogloboquadrina pachyderma; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.808922; https://doi.pangaea.de/10.1594/PANGAEA.808922

Integrated Ocean Drilling Program (IODP) Sites U1302-U1303, drilled on the SE flank of Orphan Knoll (Labrador Sea), preserve a record of detrital layers and other proxies of hydrographic change that extend the record of ice-sheet/ocean interactions through most of the Brunhes Chron. The age model is built by tandem matching of relative paleointensity (RPI) and oxygen isotope data (d18O) from Neogloboquadrina pachyderma (sin.) to reference records, indicating a mean Brunhes sedimentation rate of 14 cm/kyr. Sedimentation back to marine isotope stage (MIS) 18 is characterized by detrital layers that are detected by higher than background gamma-ray attenuation (GRA) density, peaks in X-ray fluorescence (XRF) indicators for detrital carbonate (Ca/Sr) and detrital silicate (Si/Sr), and an ice-rafted debris (IRD) proxy (wt.% >106 µm). The age model enables correlation of Site U1302/03 to IODP Site U1308 in the heart of the central Atlantic IRD belt where an age model and a similar set of detrital-layer proxies ... : Supplement to: Channell, James E T; Hodell, David A; Romero, Oscar E; Hillaire-Marcel, Claude; de Vernal, Anne; Stoner, Joseph S; Mazaud, Alain; Röhl, Ursula (2012): A 750-kyr detrital-layer stratigraphy for the North Atlantic (IODP Sites U1302–U1303, Orphan Knoll, Labrador Sea). Earth and Planetary Science Letters, 317-318, 218-230 ...