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A refractory glass chondrule in the Vigarano chondrite (1974)

Williams, R. J. ; Gibson, E. K., Jr. ; Fredriksson, K. ; [et al.]

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Publication Date: 2011-08-16

Description: 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 analogs and a comparison with studies in the system CaO-MgO-Al2O3-SiO2 indicate a temperature for formation of the chondrule at or above 1700 C followed by very rapid cooling.

Keywords: SPACE SCIENCES

Type: Meteoritics; 9; Mar. 30

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