Rheological changes in melts and magmas induced by crystallization and strain rate
| Autor: | Francesco Vetere, Gianluca Iezzi, Diego Perugini, Francois Holtz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften
Dewey Decimal Classification::900 | Geschichte und Geografie::910 | Geografie Reisen Viscosity Cooling rate Magma rheology Crystal nucleation and growth Modelling Cooling rate Crystal nucleation and growth Magma rheology Modelling Viscosity ddc:550 Cooling rate Crystal nucleation and growth General Earth and Planetary Sciences General Environmental Science ddc:910 Viscosity Crystal nucleation and growth Magma rheology Cooling rate Modelling |
| Zdroj: | Comptes rendus geoscience 354 (2022), Nr. S1 Comptes rendus geoscience |
| Popis: | This review highlights the rheological and phase proportions variation induced by cooling events from superliquidus temperature (melt) to subliquidus temperatures. It provides a comprehensive view of the rheological response of magmatic systems undergoing dynamic cooling and shear deformation. The two main parameters which are of importance to model the rheological properties of such crystallizing systems and which are simultaneously poorly investigated so far are crystallization and strain rates. The response to relatively high deformation rates results in shear thinning behavior in partly crystallized systems under variable shear rate and it should be considered in magmatic processes. Due to the sluggish crystallization of SiO2-rich melts, data are mainly available for mafic systems, which does not allow a general reappraisal. An attempt to model available literature data for less evolved systems in dynamic scenarios and a comparison with MELTS algorithm approach (thermodynamic equilibrium conditions) is provided. Since there are difficulties in comparing experimental data gained using different methodologies, we focus mainly on data obtained with the concentric cylinder technique. This highlights the fact that a general experimental protocol is needed in order to compare and model viscosity data to predict the dynamic rheological evolution for volcanic rocks. © Académie des sciences, Paris and the authors, 2022. Some rights reserved. |
| Databáze: | OpenAIRE |
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