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Chapter 5

Chapter 5. Gautam S en. Ridge Melting. Ridge vs. Hot spot melting. Hydrous Melting. Melt percolation. Compaction & melt accumulation. Compaction height. Di-An- Fo @ different pressures. Composition of invariant melts at different pressures. REE Partitioning.

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Chapter 5

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  1. Chapter 5 Gautam Sen

  2. Ridge Melting

  3. Ridge vs. Hot spot melting

  4. HydrousMelting

  5. Melt percolation

  6. Compaction & melt accumulation

  7. Compaction height

  8. Di-An-Fo@ different pressures

  9. Composition of invariant melts at different pressures

  10. REEPartitioning

  11. Sm concentration in partial melt

  12. 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.

  13. Multisaturation

  14. Multisaturation

  15. Not multisaturated – Composition N Student needs To do this

  16. Basalt magma saturated with Ol, Opx, Cpx @ 1 GPa

  17. Older experiments by Stolper showing ol+cpx+opx saturated melts at different pressures

  18. Isotope ratios of basalts from MORB and Hawaii

  19. Primitive Upper Mantle normalized REE in Basalts from Hawaii & MOR

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