High-resolution paleomagnetic investigation in the Iceland Basin ...

• Main Authors: Knudsen, Mads Faurschou, Niocaill, Conall M, Henderson, Gideon M
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2006
• Subjects: Drilling/drill rig; Leg162; Leg172; Joides Resolution; Ocean Drilling Program ODP; Knudsen; Iceland; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.715043; https://doi.pangaea.de/10.1594/PANGAEA.715043

Based on discrete samples, we report new high-resolution records of the ~185 kyr Iceland Basin (IB) geomagnetic excursion from Ocean Drilling Project (ODP) Site 1063 on the Bermuda Rise (sedimentation rate 32 cm/kyr) and from ODP Site 983 in the far North Atlantic (sedimentation rate 18 cm/kyr). Two records from Holes 1063A and 1063B are very consistent, and provide the highest resolution of the detailed field behaviour during the IB excursion obtained so far. Inclination records from Holes 983B and 983C in the far North Atlantic are also very consistent, whereas declination anomalies deviate more notably. The pseudo-Thellier (PT) technique was applied along with more conventional palaeointensity proxies (NRM/ARM and NRM/kappa) to recover relative palaeointensity (RPI) estimates from Hole 1063A and Hole 983B. As expected, these proxies indicate that the field intensity generally dropped at both sites during the IB excursion, but also that the history of RPI from the two sites is different.VGPs from Site 1063 ... : Supplement to: Knudsen, Mads Faurschou; Niocaill, Conall M; Henderson, Gideon M (2006): High-resolution data of the Iceland Basin geomagnetic excursion from ODP sites 1063 and 983: Existence of intense flux patches during the excursion? Earth and Planetary Science Letters, 251(1-2), 18-32 ...