par Jedwab, Jacques
Référence Icarus, 15, 2, page (319-340)
Publication Publié, 1971-10
Article révisé par les pairs
Résumé : Observations under the scanning electron microscope have made it possible to confirm the fact that abnormal magnetite forms do exist in the Orgueil meteorite: platelets, stackings of platelets, and framboids. The presence of spiral morphologies has been proved positively. A new typical form was identified as nodules with concavities. The morphological details of these various forms are described. The importance of the study of magnetite forms in the reconstruction of the thermodynamic conditions existing in the medium where Type I carbonaceous meteorites originated (protoplanetary cloud?) is briefly emphasized. © 1971.