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

PINTO, GABRIEL; MARIA EUGENIA VARELA; MARTINEZ R.

Antofagasta

Conferencia; XVI LARIM; 2021

Chondrules are spherical objects compoused of Fe-Mg silicates and a glass rich phase, called mesostasis. They are formed during the first stage of Solar System formation (Bollard et al., 2017). The process/es involved in chondrule formation cover a wide range of mechanisms whose nature is still unknown (Connolly Jr & Jones, 2016). Based on their chemical composition (Mg# [Mg/(Mg+Fe)]), chondrules are divided in type I (FeO-poor) and type II (FeO-rich). This study focus in petrographic and chemical study of eight chondrules from the unequilibrated CO chondrites, Catalina 008 [CO3], El M´edano 216 (EM 216) [CO3] and Los Vientos 123 (LoV 123) [CO3.1]. This chondrites were found inthe Atacama Desert and belong the Museo del Meteorito collection