Chapter 5Gautam Sen
Ridge Melting
Ridge vs. Hot spot melting
HydrousMelting
Melt percolation
Compaction & melt accumulation
Compaction height
Di-An-Fo@ different pressures
Composition of invariant melts at different pressures
REEPartitioning
Sm concentration in partial melt
Olivine saturation surface
One can use this diagram to predict the temperature and composition of olivine that would be the first phase to crystallize from mole fractions of FeO and MgO of basaltic liquids. The magma A will crystallize a Fo75 olivine at 1500˚C.
Multisaturation
Multisaturation
Not multisaturated – Composition N
Student needsTo do this
Basalt magma saturated with Ol, Opx, Cpx @ 1 GPa
Older experiments by Stolper showing ol+cpx+opx saturated melts at different pressures
Isotope ratios of basalts from MORB and Hawaii
Primitive Upper Mantle normalized REE in Basalts from Hawaii & MOR
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