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A REFRACTORY GLASS CHONDRULE IN THE VIGARANO CHONDRITE
Author(s) -
Reid Arch M.,
Williams Richard J.,
Gibson Everett K.,
Fredriksson Kurt
Publication year - 1974
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1974.tb00061.x
Subject(s) - chondrule , chondrite , refractory (planetary science) , spinel , carbonaceous chondrite , geology , meteorite , geochemistry , mineralogy , astrobiology , materials science , metallurgy , paleontology , physics
Vigarano, a type 3 carbonaceous chondrite, contains a chondrule composed of highly refractory Ca and Al rich glass with minor spinel. The chondrule formed from material similar to the Ca, Al, Ti‐rich aggregates that are common in Vigarano and other type 3 chondrites and formation of these refractory aggregates must predate formation of some Vigarano chondrules. Experiments with synthetic analogues and a comparison with studies in the system CaO‐MgO‐Al 2 O 3 ‐SiO 2 indicate a temperature for formation of the chondrule at or above 1700 °C followed by very rapid cooling.