Cosmogenic Radionuclides in Four Paired Antarctic L/LL Chondrites Indicate Similar Cosmic-Ray Exposure Age as Chelyabinsk LL Chondrite

K. C. Welten, Nishiizumi K., Caffee M. W.

52nd Lunar and Planetary Science Conference (2021), Abstract #1821


“Cosmogenic radionuclides in 4 L/LL chondrites from Wisconsin Range, Antarctica indicate they are paired fragments. Their CRE age of ~1.7 Ma overlaps with the age of the large Chelyabinsk LL chondrite, suggesting a common ejection event.”