Comparación textural y químico-mineralógica de cóndrulos y matriz en condritas ordinarias y carbonáceasBechar 002 y Allende

Resum

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.