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Petrology Chapter 12

Petrology Chapter 12. G. Sen. Ages of Anorthosites. Archaean Anorthosite. REE of Anorthosites. Phinney Model. Stratigraphy of an Archaean Ophiolite : Ivaisaartoq Intrusion, Greenland. Polat’s Model of origin of the Ivaisaartoq Intrusion. Ashwal’s Model.

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Petrology Chapter 12

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  1. Petrology Chapter 12 G. Sen

  2. Ages of Anorthosites

  3. ArchaeanAnorthosite

  4. REE of Anorthosites

  5. Phinney Model

  6. Stratigraphy of an ArchaeanOphiolite: Ivaisaartoq Intrusion, Greenland

  7. Polat’s Model of origin of the Ivaisaartoq Intrusion

  8. Ashwal’s Model

  9. Global belt of ProterozoicAnorthosites in the Gondwanaland

  10. North American Anorthosite Belt

  11. Nain Complex

  12. Pyroxenes in Nain complex Blue – anorthosites; gray – granitoids; green – ferrodiorites. (Emslie et al. 1994)

  13. Composition of Nain Groups

  14. Cross-section of Poe Mtn. anorthosite

  15. Plagioclase-melt Densities

  16. Phase relations at 1 GPa (Longhi et al. 1999)

  17. Genesis of AMCG Suite

  18. Spinifex Structures

  19. Komatiite Flow

  20. Ore Deposits in Komatiites Huppert & Sparks (1985)

  21. Komatiites & Komatiites

  22. Phase diagram

  23. MgO-SiO2 of Komatiite Types

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