Paleomagnetic and rock magnetic characterization of ODP Leg 210 cores ...

• Main Authors: Zhao, Xixi, Galbrun, Bruno, Delius, Heike, Liu, Qingsong
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2007
• Subjects: Composite Core; Drilling/drill rig; Leg210; Joides Resolution; Ocean Drilling Program ODP; Newfoundland
• Online Access: https://dx.doi.org/10.1594/pangaea.776793; https://doi.pangaea.de/10.1594/PANGAEA.776793

We conducted an integrated paleomagnetic and rock magnetic study on cores recovered from Ocean Drilling Program Sites 1276 and 1277 of the Newfoundland Basin. Stable components of magnetization are determined from Cretaceous-aged sedimentary and basement cores after detailed thermal and alternating-field demagnetization. Results from a series of rock magnetic measurements corroborate the demagnetization behavior and show that titanomagnetites are the main magnetic carrier. In view of the normal polarity of magnetization and radiometric dates for the sills at Site 1276 (~98 and ~105 Ma, both within the Cretaceous Normal Superchron) and for a gabbro intrusion in peridotite at Site 1277 (~126 Ma, Chron M1), our results suggest that the primary magnetization of the Cretaceous rocks is likely retained in these rocks. The overall magnetic inclination of lithologic Unit 2 in Hole 1277A between 143 and 180 meters below seafloor is 38°, implying significant (~35° counterclockwise, viewed to the north) rotation of the ... : Supplement to: Zhao, Xixi; Galbrun, Bruno; Delius, Heike; Liu, Qingsong (2007): Paleolatitude inferred from Cretaceous sedimentary and igneous cores recovered from Leg 210, Newfoundland margin. In: Tucholke, BE; Sibuet, J-C; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 210, 1-37 ...