Are Paleomagnetic Records From U-Channels Appropriate for Studies of Reversals and Excursions?

ABSTRACT: Sampling of sediment cores using plastic U-channels has made possible the acquisition of detailed records of paleomagnetic secular variation, geomagnetic polarity, environmental magnetic studies, and relative paleointensity over the past several million years. U-channel measurements provide the great advantage of rapid measurements of long sediment cores, but the signal resolution is attenuated by the response function of the magnetometer sensors, which therefore restrains the recovery of rapid and large-amplitude field changes. Here we focus on the suitability of the dynamics of reversals and excursions derived from U-channel measurements. We compare successive individual paleomagnetic directions of 1.5 cm × 1.5 cm × 1.5 cm cubic discrete samples with those of a 1.5-m equivalent U-channel

SUBMITTER: Philippe EGH 

PROVIDER: S-EPMC6360451 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature