Investigation of the shocked Viñales ordinary chondrite (L6) meteorite fall – Implications for shock classification, fragmentation, and collision dynamics

Icarus (in Press) Link to Article []
1Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
2California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125, USA
3Natural History Museum Vienna, Burgring 7, A-1010 Vienna, Austria
4Westfälische Wilhelms-Univ. Münster, Correnstrasse 24, 48149 Münster, Germany
Copyright Elsevier

The effects of collisions on the evolution of asteroids, ranging from local fracturing to brecciation or even to catastrophic disruption, depend primarily on the encounter velocities. Here we present a refined view of the mineralogy and texture of the recent fall Viñales, an L6 ordinary chondrite meteorite. It preserves features that require at least one energetic impact, including numerous shock melt veins of variable thickness. We report the identification of two high-pressure phases, majorite and albitic jadeite, limited to just one of these shock melt veins. Viñales is a moderately shocked sample, shock stage S4, that experienced a complex and spatially variable pressure-temperature-time history with a low (but non-zero) probability of preservation of high-pressure phases.


Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s