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Why are geomagnetic excursions not always recorded in sediments? Constraints from post-depositional remanent magnetization lock-in modelling

Roberts, Andrew; Winklhofer, Michael


Many geomagnetic excursions have been documented during the Brunhes Chron. However, high-resolution paleomagnetic studies of sediments often provide evidence of few (if any) excursions. We have investigated the reasons for this observation by modelling the post-depositional remanent magnetization (PDRM) lock-in process. A cubic lock-in function produces more rapid lock-in compared to linear and exponential functions proposed in the literature. We therefore used a cubic function to model...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2004.07.040


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