INVESTIGADORES
VARELA Maria Eugenia
artículos
Título:
Condensation origin model for chondrules.
Autor/es:
KURAT GERO,; MARIA EUGENIA VARELA; ZINNER ERNST,; ENGLER A,
Revista:
METEORITICS & PLANETARY SCIENCE
Referencias:
Año: 2004 vol. Supp p. 57 - 58
ISSN:
1086-9379
Resumen:
Old Models: Chondrules are solidified, once molten silicate droplets. Their chemical and isotopic diversity apparently is incompatible with a simple nebular condensation origin as envisioned by, e.g., [1,2]. This is because it has been thought that liquids condensing from a homogeneous nebular gas should be chemically and isotopically homogeneous and that liquids cannot condense in the solar nebula. Because meteorites contain abundantly objects that obviously must have been fully or partly melted (chondrules, glasses), there is the widespread belief that these objects and in particular chondrules must form from melted solids. There is now growing evidence that liquids can indeed condense from a solar nebula gas, provided the gas/dust ratio is sufficiently low (e.g., 3,4]. However, the pre-conception still holds that condensates must be either all liquid or all solid. Here we sketch a way that leads to a simple model for chondrule formation via condensation.