A GLASS INCLUSION HOSTED BY SPINEL INSIDE A GLASS-RICH CHONDRULE FROM CATALINA 278 (LL 3.4): A SAMPLE OF THE INITIAL LIQUID?

MARIA EUGENIA VARELA; DAN TOPA; JULIA ROSZJAR; RODRIGO MARTINEZ

Houston

Conferencia; 53 nd Lunar and Planetary Science Conference; 2022

NASA

The genesis of Ca-Al-rich glass inclusions in olivine grains of carbonaceous chondrites isa matter of ongoing debate since the seventies. Thosefound in the Murchison type CM2 chondrite were considered to be the result of a condensation process thatformed the olivine [1]. Subsequently, [2] and [3] considered them to be trapped remnants of a parent liquid and thus be the product of fractional crystallization ofchondrule melts. The first trace elements ever done in glass inclusions in olivine from the Renazzo CR2chondrite [4] supported a condensation origin of the glass inclusions. Hence, variations in the chemical composition of the glasses could reflect processes in the early solar nebula. Up to date glass inclusions in chondrules have been found in olivine almost exclusively. Here, we report of the first glass inclusion hosted in spinel within a glass-rich chondrule from the unequilibrated ordinary chondrite Catalina 278 (LL3.4), found 2017 in the Atacama desert in Chile