The Richfield LL3 chondrite
by Rubin, A. E.; Benoit, P.; Reed, B.; Eugster, O.; Polnau, E.
Richfield is a moderately shocked (shock stage S4) LL3.7 genomict breccia find consisting mainly of light-colored recrystallized clasts and dark clasts exhibiting significant silicate darkening; a few impact-melt-rock clasts and LL5 chondrite clasts also occur. The cosmic-ray exposure age of 14.5 Ma is indistinguishable from the main exposure peak for LL chondrites (15 Ma). Although the exposure ages indicate little He loss, the gas-retention ages indicate high gas losses that must have occurred prior to or during ejection from the LL parent body.
- Journal
- Meteoritics and Planetary Science
- Volume
- 31
- Issue
- 6
- Year
- 1996
- Start Page
- 925-927
- URL
- https://dx.doi.org/10.1111/j.1945-5100.1996.tb02125.x
- ISBN/ISSN
- 0026-1114
- DOI
- 10.1111/j.1945-5100.1996.tb02125.x