Authors
Kevin Righter, P Abell, David Agresti, Eve L Berger, Aaron S Burton, Jeremy S Delaney, MD Fries, EK Gibson, Makiko K Haba, R Harrington, Gregory F Herzog, Lindsay P Keller, D Locke, Fara N Lindsay, Timothy J McCoy, RV Morris, K Nagao, Keiko Nakamura‐Messenger, PB Niles, Larry E Nyquist, J Park, ZX Peng, C‐Y Shih, JI Simon, CC Swisher III, Michael J Tappa, Brent D Turrin, RA Zeigler
Publication date
2015/10
Journal
Meteoritics & Planetary Science
Volume
50
Issue
10
Pages
1790-1819
Description
Three masses of the Chelyabinsk meteorite have been studied with a wide range of analytical techniques to understand the mineralogical variation and thermal history of the Chelyabinsk parent body. The samples exhibit little to no postentry oxidation via Mössbauer and Raman spectroscopy indicating their fresh character, but despite the rapid collection and care of handling some low levels of terrestrial contamination did nonetheless result. Detailed studies show three distinct lithologies, indicative of a genomict breccia. A light‐colored lithology is LL5 material that has experienced thermal metamorphism and subsequent shock at levels near S4. The second lithology is a shock‐darkened LL5 material in which the darkening is caused by melt and metal‐troilite veins along grain boundaries. The third lithology is an impact melt breccia that formed at high temperatures (~1600 °C), and it experienced rapid cooling and …
Scholar articles
Mineralogy, petrology, chronology, and exposure history of the Chelyabinsk meteorite and parent body
K Righter, P Abell, D Agresti, EL Berger, AS Burton… - Meteoritics & Planetary Science, 2015