Abstract
Vapor-grown crystals intimately related to shock metamorphism of meteorites were found in the Yanzhuang chondrite which had been heavily impacted in the space. These crystals include: (i) subhedral low-Ca pyroxene occurring on the wall of the pores within a silicate melt pocket that experienced a shock temperature higher than 1500 °C, (ii) FeNi needle-whiskers (taenite) occurring in the cracks in the partially melted chondritic facies that experienced a shock temperature of 850–1300 °C, and (iii) euhedral troilite crystals with abundant microholes occurring in the cracks in the brecciated facies and the lightly deformed chondritic facies that experienced a shock temperature lower than 850 °C. The occurrence and mineralogical features of vapor-grown crystals show that vaporization of minerals could be produced in heavily impacted meteorites and that a small amount of crystals could be deposited in situ from vapor phases.
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Xie, X., Chen, M. (2020). Vapor-Grown Crystals in the Yanzhuang Meteorite. In: Yanzhuang Meteorite: Mineralogy and Shock Metamorphism. Springer, Singapore. https://doi.org/10.1007/978-981-15-0735-9_6
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DOI: https://doi.org/10.1007/978-981-15-0735-9_6
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