Computer Science
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004m%26ps...39.1797c&link_type=abstract
Meteoritics & Planetary Science, Vol. 39, No. 11, p.1797-1808
Computer Science
6
Scientific paper
Ovoid grains consisting of glass of stoichiometric (Mg, Fe)SiO3 composition that is intimately associated with majorite were identified in the shock veins of the Suizhou meteorite. The glass is surrounded by a thick rim of polycrystalline majorite and is identical in composition to the parental low-Ca pyroxene and majorite. These ovoid grains are surrounded by a fine-grained matrix composed of majorite-pyrope garnet, ringwoodite, magnesiowüstite, metal, and troilite. This study strongly suggests that some precursor pyroxene grains inside the shock veins were transformed to perovskite within the pyroxene due to a relatively low temperature, while at the rim region pyroxene grains transformed to majorite due to a higher temperature. After pressure release, perovskite vitrified at post-shock temperature. The existence of vitrified perovskite indicates that the peak pressure in the shock veins exceeds 23 GPa. The post-shock temperature in the meteorite could have been above 477 °C. This study indicates that the occurrence of high-pressure minerals in the shock veins could not be used as a ubiquitous criterion for evaluating the shock stage of meteorites.
Chen Ming
El Goresy Ahmed
Xie Xiande
No associations
LandOfFree
A shock-produced (Mg, Fe)SiO3 glass in the Suizhou meteorite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A shock-produced (Mg, Fe)SiO3 glass in the Suizhou meteorite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A shock-produced (Mg, Fe)SiO3 glass in the Suizhou meteorite will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1113611