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; F. OLIVARES; K. SOTO; MARIA EUGENIA VARELA; MARTINEZ R.
Lugar:
Houston
Reunión:
Conferencia; 52 nd Lunar and Planetary Science Conference; 2020
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