1 / 5

Basic Ingredients for a useful theory of magma dynamics

Basic Ingredients for a useful theory of magma dynamics. A basic recipe for a theory of Magma Dynamics. Requires: At least 2 phases (include both melt and solid) Significant mass-transfer between phases (melting/reaction/crystallization/thermodynamics)

ninac
Download Presentation

Basic Ingredients for a useful theory of magma dynamics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Basic Ingredients for a useful theory of magma dynamics CIG Magma Dynamics Workshop

  2. A basic recipe for a theory of Magma Dynamics Requires: • At least 2 phases (include both melt and solid) • Significant mass-transfer between phases (melting/reaction/crystallization/thermodynamics) • The system must be permeable at some scale to allow melts to move. • The system must be deformable (consistency with mantle convection and lithospheric deformation) • Considers chemical transport in open systems • Passive tracers • Reactive components CIG Magma Dynamics Workshop

  3. Coupled Fluid-Solid Mechanics Problems to consider • The “dry problem” (no fluids) • Permeable flow in viscous media (magma migration in the convecting mantle) • Brittle flow in the crust and lithosphere (diking) • Disaggregation and the transition to Diking (Mushes?) Fundamental Issues: • Appropriate rheologies for coupled fluid-solid systems • Consistent solid stress and fluid pressure. CIG Magma Dynamics Workshop

  4. Melting Models Problems to consider • Forced Adiabatic melting • Simplified Reactive Systems • Simplified Thermodynamics/Phase Diagrams • Fully coupled Thermodynamics/Geodynamics • Role of H20/Volatiles Fundamental issues: • # Phases/Components/Equations of state? • Uncertainty in thermodynamic models • What is the correct Pressure? CIG Magma Dynamics Workshop

  5. Comparing Models to Observations ( & Experiment) Problems to consider • Geochemistry/Petrology • Trace element Geochemistry • Short and long-lived radio nuclides (e.g. U-series) • Major element chemistry/petrology • Geophysics • Seismology, Seismicity, Gravity, E&M • Geology • Volume/Geometry/Organization/(History) of magmatic systems and plate boundaries Fundamental issues: • Partition Coefficients/Diffusivities/Dispersivities for tracers • Material properties (elastic moduli, conductivity, density) of partially molten materials • Computational seismology and synthetic seismograms • Interfacing with Data Bases (bathymetry, chemistry, seismology, seismicity…) CIG Magma Dynamics Workshop

More Related