Publication: Comparación textural y químico-mineralógica de cóndrulos y matriz en condritas ordinarias y carbonáceas: Bechar 002 y Allende
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Publication Date
2015
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Sociedad Geológica de España
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Abstract
Las condritas representan la materia meteorítica más primitiva del sistema solar. Su estudio aporta importantes claves mineralógicas y cosmoquímicas para comprender: a) los procesos que tuvieron lugar en las primeras etapas de su formación y b) su influencia en la composición de las superficies de otros planetas y lunas. Este trabajo presenta la caracterización textural y químico-mineralógica comparada de los cóndrulos y la matriz de dos tipos de condritas: la condrita ordinaria Bechar 002 (H6) y la condrita carbonácea de Allende (CV3). Los resultados obtenidos permiten conocer mejor las características de ambos ejemplares y confirman que han sido sometidas a procesos diferentes a partir de su formación en el cuerpo padre asteroidal: a) procesos de metamorfismo térmico y homogeneización y b) transformaciones secundarias debidas a alteración acuosa.
Chondrites represent the most primitive meteoritic matter in the solar system. Their study provides essential mineralogical and cosmochemical keys to understand: a) the processes that occurred in the early stages of its formation and b) their role and significance influencing the composition of the surfaces of other planets and moons. This work presents a detailed comparison of the textural and chemical-mineralogical features of the chondrules and matrix of two types of chondrites: the Bechar 002 ordinary chondrite and the Allende carbonaceous chondrite. The results obtained allow knowing better the characteristics of both specimens, and confirm that they have undergone different processes after their formation in the asteroidal parent body: a) thermal processes of thermal metamorphism and homogeneization and b) secondary transformations due to aqueous alteration processes.
Chondrites represent the most primitive meteoritic matter in the solar system. Their study provides essential mineralogical and cosmochemical keys to understand: a) the processes that occurred in the early stages of its formation and b) their role and significance influencing the composition of the surfaces of other planets and moons. This work presents a detailed comparison of the textural and chemical-mineralogical features of the chondrules and matrix of two types of chondrites: the Bechar 002 ordinary chondrite and the Allende carbonaceous chondrite. The results obtained allow knowing better the characteristics of both specimens, and confirm that they have undergone different processes after their formation in the asteroidal parent body: a) thermal processes of thermal metamorphism and homogeneization and b) secondary transformations due to aqueous alteration processes.