Artículo
Mincy mesosiderite metallic nodules analyzed by EBSD: An approach to understanding their thermal history
García, Laura Noel
; Varela, Maria Eugenia
; Hwang, Shyh Lung; Shen, Pouyan; Bolmaro, Raul Eduardo
; Avalos, Martina Cecilia
Fecha de publicación:
11/2022
Editorial:
John Wiley & Sons
Revista:
Meteoritics & Planetary Science
ISSN:
1086-9379
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Meteorites carry information about the most common processes that have been active in the early solar system. In particular, mesosiderites are meteorites with a structure considered to be composed of equal parts of iron–nickel metal and silicates. A natural delimitation in the study of such complex systems is the discrimination of the iron–nickel metallic and silicate domains. In this work, we focus on the metallic phases of the Mincy mesosiderite, a specimen available at the Instituto de Ciencias Astronómicas, de la Tierray y del Espacio repository. In Mincy, the metallic phases are iron–nickel–carbon alloys that are distributed forming metallic lumps or pebbles (referred to as metallic nodules in the article) in which kamacite and taenite are present, and taenite is found both at the kamacite/silicate interface and surrounded by kamacite, that is, isolated from the silicates. We made use of the electron backscattered diffraction technique to determine the crystallographic orientation relationships along the taenite/kamacite boundaries as well as for characterizing the (hkl)-specific grain boundaries regarding the underlying tilt, twist, or twinning mechanism to assist the interpretation of the phase transformations and mechanisms that could explain the formation of these metallic nodules. From the results, each of the metallic nodules has a unique temperature–pressure history and kinetics to undergo phase transformations (mainly partial melting, heterogeneous nucleation-controlled solidification, and possible evaporation–condensation) as well as liquid-phase sintering and recrystallization in its own way.
Palabras clave:
MESOSIDERITE
,
ELECTRON BACKSCATTER DIFFRACTION
,
TAENITE
,
KAMACITE.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(ICATE)
Articulos de INST.D/CS ASTRONOMICAS D/LA TIERRA Y DEL ESPACIO
Articulos de INST.D/CS ASTRONOMICAS D/LA TIERRA Y DEL ESPACIO
Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Citación
García, Laura Noel; Varela, Maria Eugenia; Hwang, Shyh Lung; Shen, Pouyan; Bolmaro, Raul Eduardo; et al.; Mincy mesosiderite metallic nodules analyzed by EBSD: An approach to understanding their thermal history; John Wiley & Sons; Meteoritics & Planetary Science; 57; 11; 11-2022; 1958-1972
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