ICATE   21876
INSTITUTO DE CIENCIAS ASTRONOMICAS, DE LA TIERRA Y DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
The New Peruvian Meteorite Carancas: Mo¨ssbauer
Autor/es:
MUNAYCO P.; MUNAYCO J..; VARELA M.E.; SCORZELLI R
Revista:
EARTH, MOON, AND PLANETS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2013 vol. 110 p. 1 - 9
ISSN:
0167-9295
Resumen:
Abstract The Carancas meteorite fell on 15 September 2007 approximately 10 km south of Desaguadero, near Lake Titicaca, Peru, producing bright lights, clouds of dust in the sky and intense detonations. The Carancas meteorite is classified as a H4?5 ordinary chondrite with shock stage S3 and a degree of weathering W0. The Carancas meteorite is characterized by well defined chondrules composed either of olivine or pyroxene. The Mo¨ssbauer spectra show an overlapping of paramagnetic and magnetic phases. The spectra show two quadrupole doublets associated to olivine and pyroxene; and two magnetic sextets, associated with the primary phases kamacite/taenite and Troilite (Fe2?). Metal particles were extracted from the bulk powdered samples exhibit only kamacite and small amounts of the intergrowth tetrataenite/antitaenite. X-Ray diffractogram shows the primary phases olivine, pyroxene, troilite, kamacite, diopside and albite. Iron oxides has not been detected by Mo¨ssbauer spectroscopy or XRD as can be expected for a meteorite immediately recovered after its fall.