Elucidation of paleo-cosmic-ray variations and synchronization of paleo-archives using a multiple sample analysis of beryllium isotopes

Abstract

Cosmogenic ¹⁰Be in natural samples is analyzed for a wide variety of applications in earth and planetary sciences. It has a long half-life (~1.4 Myr) and therefore should serve as a proxy of paleo-cosmic-ray variations during the past ca. 10 Myr. Recent improvements of the throughputs of ¹⁰Be and ⁹Be analyses enable us to obtain high-resolution time series of the Be isotopes from various paleo-archives. In this talk, I will present some recent developments in such studies aimed to elucidate paleo-cosmic-ray variations and synchronize multiple paleo-archives.