info:eu-repo/semantics/article
Fe2+-Mg order-disorder study in orthopyroxenes from São João Nepomuceno (IVA) iron meteorite
Registro en:
Dos Santos, Eder Paulo; Scorzelli, R. B.; Varela, Maria Eugenia; Munayco, P.; Fe2+-Mg order-disorder study in orthopyroxenes from São João Nepomuceno (IVA) iron meteorite; Springer; Hyperfine Interactions; 224; 1-3; 3-2013; 251-256
0304-3843
Autor
Dos Santos, Eder Paulo
Scorzelli, R. B.
Varela, Maria Eugenia
Munayco, P.
Resumen
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. Fil: Dos Santos, Eder Paulo. Centro Brasileiro de Pesquisas Fisicas; Brasil; Fil: Scorzelli, R. B.. Centro Brasileiro de Pesquisas Fisicas; Brasil; Fil: Varela, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico - Conicet - San Juan. Instituto de Ciencias Astronómicas de la Tierra y del Espacio; Argentina Fil: Munayco, P.. Centro Brasileiro de Pesquisas Fisicas; Brasil;