INVESTIGADORES
VARELA Maria Eugenia
congresos y reuniones científicas
Título:
CHONDRULE TIESCHITZ IIIM: CLUES TO THE ORIGIN OF EARLY LIQUIDS?
Autor/es:
VARELA, M.E; ZINNER ERNST; KURAT G,
Lugar:
Tucson
Reunión:
Conferencia; Lunar and Pkanetary Science Conference; 2009
Institución organizadora:
Lunar and Planetary Institute- NASA
Resumen:
Porphyritic chondrules containing variable volumes (55 - 85 vol %) of microcrystalline mesostasis are one of the two types of "glass-rich" chondrules present in unequilibrated ordinary chondrites [1]. The texture of these objects indicates that they are quenched liquid droplets. While there is still no agreement on the source of the liquid that formed the droplets, there is, however, a complete con-sensus on the time of their formation: early in the history of the solar system. Consequently, these chondrules might help us to decipher the early steps of chondrule formation. Here we report the results of an ASEM and SIMS study of a por-phyritic olivine chondrule that is very rich in microcrystal-line mesostasis, from the Tieschitz (H3.6) unequilibrated ordinary chondrite.