INVESTIGADORES
VARELA Maria Eugenia
congresos y reuniones científicas
Título:
Size-distribution of nebular components in CO3 chondrites: Hits at an heterogeneous accretion history
Autor/es:
PINTO, GABRIEL; Y. MARROCCHI; OLIVARES F.; SOTO K.; MARIA EUGENIA VARELA; MARTINEZ R.
Reunión:
Conferencia; 52 nd Lunar and Planetary Science Conference; 2021
Resumen:
A key question regarding the structure and evolution of the protoplanetary disk is relatedto the distribution of nebular components prior to planetesimal accretion [e.g. 1]. The abundance and size ofchondrules, calcium aluminium-rich inclusions (CAIs),olivine amoeboid aggregates (AOAs) and isolatedolivine grains (IOGs) have been largely determined indifferent meteorite groups [e.g. 2,3,4]. In this study, weselected all nebular components (i.e. CAI; AOAs; FeOrich and FeO-poor chondrules; and IOGs) larger than~20 µm in 3 carbonaceous CO3 chondrites found inthe Atacama Desert: El Médano 216 (EM 216,N=2112); El Médano-397 (EM 397, N=1740); and ElMédano 463 (EM 463, N=3665). A specific attentionhas been paid to fine-grained rim (FGR) material surrounding refractory inclusions, chondrules and IOGs