Glasses in the D'Orbigny and Cachari meteorites : a Mössbauer study.

ABDUY,; ACEVEDO I, SOUZA; STEWART S,; LOPEZ A,; MARIA EUGENIA VARELA; KURAT GERO,; SCORZELLI R,

METEORITICS & PLANETARY SCIENCE

METEORITICAL SOC

Año: 2005 vol. 40 p. 13 - 14

1086-9379

D?Orbigny is exceptionally rich in glass, a feature that makes it a unique member of the angrites. The Cachari eucrite is also an unusual meteorite as it contains appreciable amounts of glasses. There is a general belief that glasses in eucrites are formed by impact processes on the eucrite parent body. This belief is based on the fact that the major element chemical composition of glasses is similar to that of their respective bulk host rock. However, recent studies that compare the trace element contents in glasses from eucrites with those from other achondrites proposed a different and new hypothesis on the origin of glasses and the role of silicate liquids in the genesis of meteorites [1].