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Petrology Chapter 8

Petrology Chapter 8. Gautam Sen. Plates & Mid-oceanic Ridges. Types of Spreading Center. Ridge offset by a Transform fault. Overlapping Spreading Center. Relief map of EPR. Continuous Ridge Axis with a small bend. REE in Basalts from MOR & Hawaii.

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Petrology Chapter 8

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  1. Petrology Chapter 8 Gautam Sen

  2. Plates & Mid-oceanic Ridges

  3. Types of Spreading Center Ridge offset by a Transform fault Overlapping Spreading Center Relief map of EPR Continuous Ridge Axis with a small bend

  4. REE in Basalts from MOR & Hawaii

  5. Nd-Sr isotope composition of MORB vs. Hawaiian tholeiites

  6. Iceland: located on the MOR system

  7. Deeper Structure of a Fast Spreading Ridge

  8. Deeper Structure of a Slow Spreading Ridge

  9. Fractionation of MAR vs. EPR

  10. Ridge evolution

  11. Ridge extension & passive melting

  12. Na8 Estimation

  13. Na8 vs. Crustal thickness

  14. Na8 vs. Fe8 Relationships

  15. Generation of MORB: Thin Crust

  16. Generation of MORB: Thick Crust

  17. MORB Generation: Volatiles & Pyroxenite source considered

  18. Melt Accumulation & Dispersal of residual mantle

  19. Hawaii-Emperor Volcanic Chain

  20. Tuzo Wilson’s Model: Origin of Hawaiian Chain

  21. Growth stages of a Hawaiian volcano

  22. Normative Composition of Hawaiian tholeiites & Alkalic lavas

  23. MgO-TiO2: MORB vs. Hawaiian basalts

  24. Pb-isotopes: Loa vs Kea Volcanoes

  25. MORB vs. Hawaiian-Emperor Seamounts: Nd/Sr Isotopes

  26. Hawaiian Mantle Xenoliths: P-T

  27. Nd-Sr Isotope composition of Hawaiian spinel peridotite xenoliths and Lavas

  28. Os-Hf Isotope composition of the xenoliths compared with lavas

  29. Lithosphere beneath Oahu

  30. Seismic Trace of the Hawaiian Hot Spot

  31. FeO*-SiO2 of Hawaiian Tholeiites: Koolau is a special case

  32. Hauri’s Zoned Plume Model

  33. Sobolev: Arguments for a Ni-rich Pyroxenite in the source for Hawaiian magmas

  34. Sobolev: Arguments for a Ni-rich Pyroxenite in the source for Hawaiian magmas - 2

  35. Sobolev et al. Melting Model for Hawaii

  36. P-T Conditions of multisaturation for Hawaii

  37. Presnall’s mantle polybaric liquids and Hawaiian primitive glasses

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