The Re¤union Subchronozone at ODP Site 981 (Feni Drift, North Atlantic)

• Main Authors: J. E. T. Channell A, J. Labs A, M. E. Raymo B
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: 2003 Elsevier B.V. All rights reserved. Keywords; magnetic stratigraphy; isotope stratigraphy; Re¤union Subchron; North Atlantic; Rockall Plateau; Feni Drift
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.596.4485; http://www.moraymo.us/2003_Channelletal.pdf

At Ocean Drilling Program Site 981, the Re¤union Subchron is recorded from the Marine Isotopic Stage (MIS) 81/ 82 boundary to MIS 79 as a single normal polarity zone spanning the 2.115^2.153-Ma interval. According to the age model, produced by matching the Site 981 N18O record to an orbitally-tuned reference record, the duration of the Re¤union Subchron (38 kyr) is almost four times that assumed in current geomagnetic polarity timescales. High interval sedimentation rates (18 cm/kyr) during MIS 81 at Site 981 have resulted in an unusually detailed record of the Subchron. Virtual geomagnetic poles during the onset and demise of the Re¤union Subchron trace a series of mainly anticlockwise loops over eastern Asia.