Age model, RPI and VGP from IODP Sites 303-U1304, 303-U1305 and 303-U1306 at the Matuyama-Brunhes boundary ...

• Main Author: Channell, James E T
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2020
• Subjects: IODP Site U1304; IODP Site U1305; IODP Site U1306; Matuyama-Brunhes polarity transition; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Pacific; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.919883; https://doi.pangaea.de/10.1594/PANGAEA.919883

Integrated Ocean Drilling Program (IODP) Expedition 303 to the North Atlantic provided 16 records of the Matuyama-Brunhes polarity transition (MBT), based on u-channel and discrete samples, from holes drilled at three sites (Sites U1304, U1305 and U1306) that have mean Brunhes sedimentation rates of 16-18 cm/kyr. The MBT occurs during the transition from marine isotope stage (MIS) 19c to MIS 18e, with mid-point at ~773 ka, and a transition duration of ~8 kyr. Combining the new MBT records, including one new record for the top Jaramillo, with previously published North Atlantic MBT records (ODP Sites 983, 984 and 1063) yields a total of more than 20 high-sedimentation-rate polarity transition records. The MBT yields a repetitive pattern of transitional field states as virtual geomagnetic poles (VGPs) move from high southern latitudes to loop over the Pacific, group in NE Asia, and transit into the mid-latitude South Atlantic before reaching high latitudes in the Northern Hemisphere. The VGPs for the top ...