Non-porphyritic chondrules in unequilibrated chondrites (CO) from Atacama Desert

PINTO, GABRIEL; MARIA EUGENIA VARELA; RODRIGO MARTINEZ

Antofagasta

Congreso; LARIM 2019; 2019

Chondrules belong to the protoplanetary disc (PPD). According to their texture they can be dividedin non-porphyritic and porphyritic, as a consequence of rapid or slow cooling rate, respectively. We performed apetrographic and chemical composition study of three glass-rich chondrule, one radial pyroxene and four barredolivine samples from three unequilibrated carbonaceous (CO3) chondrite. The presence of volatile elementsand SiO2 can provide information to understand the low temperature processes that modify the bulk chemicalcomposition of chondrules, acquired at the moment of formation at the PPD, when acting as open systems.