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Titre : | Modélisation d'Olivines et de Plagioclases dans un basalte expérimental |
Auteurs : | Kaïty KONE ; Julie MAUDET ; Kaïty KONE ; Julie MAUDET |
Type de document : | Mémoire d'initiation à la recherche |
Année de publication : | 2020 |
Concepts : |
EVOLUTION
OLIVINE PLAGIOCLASE MODELISATION TOMOGRAPHIE CRISTALLINITE COMPARAISON |
Résumé : | This Research Initiation thesis consisted of the modeling of olivines and plagioclases in a synthetic basalt. The objective was to complete the data acquired in previous work and to compare them with the theoretical work of Pupier et al., 2008. The theoretical work of Pupier et al., 2008 consisted in observing the evolution of plagioclase and olivine crystals in a basalt. For this purpose, 2D images from tomography were acquired in order to use them as a support on the Slice© software to perform CSD and crystallinity calculations. In this thesis, the 3D modeling was carried out on the 3DEXPERIENCE© software developed by Dassault Systèmes. During this work, the use of the HTC live helmet allowed a better observation of the beads. As a result, questions were raised about the modelling methods and theoretical results. The suppression of collisions between crystals decreased the crystallinity, thus increasing the already large gap between theoretical and experimental crystallinities. In addition, the results from the theoretical crystallinity were recalculated to verify this discrepancy between the two methods. Even if the CSD pattern remains log linearly decreasing, differences between the theoretical and experimental results of slope and intercept values are observed. In addition, the 2D and 3D CSDs are calculated differently. This makes it difficult to compare them. For this purpose, 4 types of CSDs using different calculation methods are defined. |
Spécialité : | Géologie |
Numéro de promo : | 82 |
numéro MIR : | 881 |