ICATE 21876
INSTITUTO DE CIENCIAS ASTRONOMICAS, DE LA TIERRA Y DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Fe2+-Mg order?disorder study in orthopyroxenes
Autor/es:
DOS SANTOS E.; SCORZELLI R,; VARELA M.E.; MUNAYCO P.
Revista:
HYPERFINE INTERACTIONS
Editorial:
Springer
Referencias:
Lugar: Heidelberg; Año: 2013 p. 245 - 250
ISSN:
0304-3843
Resumen:
Abstract São João Nepomuceno (SJN) is an iron meteorite belonging to IVA chemical group. It consists of Fe-Ni metal matrix and silicate inclusions made of a coarse-grained mixture of tridymite, orthopyroxene and clinopyroxene. In spite of the extensive work performed on the IVA group there is still no consensus about their origin and its thermal history is subject of ongoing debates. In this work, we report preliminary results on Fe2+ distribution in the non-equivalent octahedral sites in orthopyroxene crystals extracted from São João Nepomuceno in order to infer on the thermal history of this meteorite and therefore acquire more information related to the origin of the IVA iron meteorite group.
