Slide 1 Dry Mantle Melting and the Origin of Basaltic Magma GEOS 508 Lec 14-15-16 Slide 2 Mantle melting l Needs special condition to melt, usually solid; l Melt fractions…

Lithospheric Plate Structure Lithosphere (or plate) = crust + uppermost, rigid part of the mantle  Asthenosphere Low-velocity zone in the upper mantle at a depth of ~100-200…

PLATETECTONICS Or Are we dancing on an eggshell? Is there a magma ocean below? â¦and much more⦠PLATETECTONICS What causes plate movement? Heat transfer by mantle convection!…

PLATETECTONICS Or Are we dancing on an eggshell? Is there a magma ocean below? â¦and much more⦠PLATETECTONICS What causes plate movement? Heat transfer by mantle convection!…

Partial melting 1. Binary and ternary phase diagrams; melting of the mantle 1 - C Systems The system SiO2 After Swamy and Saxena (1994), J. Geophys. Res., 99, 11,787-11,794.…

VOLCANOES VOLCANOES Volcano Features Magma chamber: contains the hot, liquid magma Vents: holes in the crust where the magma rises to the surface Crater: a funnel shaped…

Textural Interpretations from Phase Diagrams Binary Systems with Congruent Melting Plagioclase forms before augite– Diabasic tecture This forms on the right side of the…