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https://hdl.handle.net/123456789/1441| Τύπος: | Άρθρο σε επιστημονικό περιοδικό |
| Τίτλος: | Microstructural and textural modification of columnar calcite under increasing shear strain (Evia Island, Greece) |
| Συγγραφέας: | [EL] Γερογιάννης, Νικόλαος[EN] Gerogiannis, Nikolaos [EL] Χατζάρας, Βασίλειος[EN] Chatzaras, Vasileios [EL] Αραβαντινού-Κουτσουβή, Ειρήνη[EN] Aravadinou-Koutsouvi, Eirini [DE] Gürer, Derya [EL] Ξυπόλιας, Παρασκευάς[EN] Xypolias, Paraskevas |
| Ημερομηνία: | 19/05/2022 |
| Περίληψη: | We studied the microstructural and textural modification of columnar calcite naturally deformed at increasing shear strain. The studied marbles were sampled from different structural levels of the Basal Unit of the Cycladic Massif on Evia Island, Greece. The marbles have experienced high pressure metamorphism at peak temperatures around 350 °C. The long axes of the columnar calcite grains and their c-axes were originally oriented normal to the foliation and were subsequently rotated during exhumation. The obliquity of the long axes of relict calcite grains with respect to the foliation was used to infer shear strain. Electron backscatter diffraction (EBSD) analysis was used to characterize the marble microstructure as well as the crystallographic preferred orientations (CPO) and misorientations in calcite. Recrystallization of calcite was active from very low shear strains (0.1) and mylonitization (∼60% area fraction of recrystallized grains) took place at shear strains >∼4. Subgrain rotation was the dominant recrystallization mechanism in calcite in all samples. Differential stress and strain rate did not show any systematic variation with increasing shear strain. A shear strain of up to ∼4 was not enough to produce a strong CPO in calcite. |
| Γλώσσα: | Αγγλικά |
| Σελίδες: | 10 |
| DOI: | 10.1016/j.jsg.2022.104632 |
| EISSN: | 1873-1201 |
| Θεματική κατηγορία: | [EL] Γεωεπιστήμες, γενικά[EN] Geosciences, general |
| Λέξεις-κλειδιά: | Marbles; EBSD analysis; Dynamic recrystallization; Shape preferred orientation; Crystallographic preferred orientation; Differential stress |
| Κάτοχος πνευματικών δικαιωμάτων: | © 2022 Elsevier Ltd. All rights reserved. |
| Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη: | https://www.sciencedirect.com/science/article/pii/S0191814122001249 |
| Ηλεκτρονική διεύθυνση περιοδικού: | https://www.sciencedirect.com/journal/journal-of-structural-geology |
| Τίτλος πηγής δημοσίευσης: | Journal of Structural Geology |
| Τόμος: | 160 |
| Σελίδες τεκμηρίου (στην πηγή): | Article no 104632 |
| Σημειώσεις: | This research is co-financed by Greece and the European Union (European Social Fund- ESF) through the Operational Programme « Human Resources Development, Education and Lifelong Learning» in the context of the project “Reinforcement of Postdoctoral Researchers - 2nd Cycle” (MIS-5033021), implemented by the State Scholarships Foundation (ІΚΥ) (awarded to N. Gerogiannis) |
| Εμφανίζεται στις συλλογές: | Μεταδιδακτορικοί ερευνητές |
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