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Progress in Earth and Planetary Science
Fig. 8 | Progress in Earth and Planetary Science

Fig. 8

From: Formation, preservation and extinction of high-pressure minerals in meteorites: temperature effects in shock metamorphism and shock classification

Fig. 8

Variable shock features in L chondrites previously classified as shock stage S5-6. a RC 106 (L6) thin section with a thick shock melt vein. The insert is a plane-polarized light (PPL) micrograph of the shock melt vein containing blue ringwoodite (rwd). b PPL micrograph of a shock melt vein in Mbale (L5-6). The clasts in the thin part of vein are wadsleyite (wads) aggregates and the thicker vein contains polycrystalline olivine. c backscattered electron (BSE) image of a polycrystalline olivine (ol) aggregate with trace wadsleyite in contact with majorite garnet (gt) in quenched Mbale shock melt. d Shock-darkened impact melt breccia Chico (L6). e BSE image of a barred olivine chondrule in melt breccia NWA 091 (L6). The troilite (tr) veinlets are disseminated in the olivine. f BSE image of recrystallized sodic pigeonite (pg)-plagioclase (pl)-olivine (ol) aggregate in Chico. The insert is another recrystallized olivine-plagioclase aggregate. Figures modified after Sharp et al. (2015), Hu (2016) and Hu and Sharp (2017)

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