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Igneous Rocks Formed in Rift

Course 7 – Igneous Rocks. Igneous Rocks Formed in Rift. Igneous Rocks Formed Above Subducting Plate. Extrusive Igneous Rock. Intrusive Igneous Rock. Bowen’s Reaction Series. Igneous Rock Classification by Composition. Mafic Rocks. Basalt. Gabbro. Andesite. Intermediate Rocks.

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Igneous Rocks Formed in Rift

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  1. Course 7 – Igneous Rocks Igneous Rocks Formed in Rift Igneous Rocks Formed Above Subducting Plate

  2. Extrusive Igneous Rock

  3. Intrusive Igneous Rock

  4. Bowen’s Reaction Series

  5. Igneous Rock Classification by Composition

  6. Mafic Rocks Basalt Gabbro

  7. Andesite Intermediate Rocks Diorite

  8. Granite Felsic Rocks Rhyolite

  9. Peridotite Ultramafic Rocks Komatiite

  10. Ternary Diagrams

  11. Q Q Quartzolite 90 90 Quartz-rich Granitoid 60 60 60 60 Grano- Tonalite Granite Alkali Feldspar Granite diorite Rhyolite Dacite Qtz. Diorite/ Alkali Fs. Qtz. Gabbro 20 20 20 Quartz Syenite 20 Quartz Quartz Quartz Andesite/Basalt Alkali Fs. Monzonite Syenite Monzodiorite Diorite/Gabbro/ Trachyte Latite Syenite 5 5 Anorthosite Syenite Monzodiorite Monzonite 35 65 90 35 10 65 A P A P (Foid)-bearing (Foid)-bearing (Foid)-bearing (foid)-bearing (foid)-bearing (foid)-bearing Trachyte Syenite Monzonite Monzodiorite Latite Andesite/Basalt (Foid)-bearing 10 10 10 10 Diorite/Gabbro (Foid)-bearing Alkali Fs. Syenite (Foid) Syenite (Foid) (Foid) Phonolite Tephrite Monzodiorite Monzosyenite (Foid) Gabbro 60 60 60 60 (Foid)ites (Foid)olites F F Modal Classification of Igneous Rocks Plutonic Volcanic Q = Quartz A = Alkali Feldspar F = Feldspathoids P = Plagioclase

  12. Igneous Textures Phaneritic texture - granite Aphanitic texture - basalt

  13. Igneous Textures Porphyritic texture - Granite Volcanic Glass - Obsidian

  14. Igneous Textures Volcaniclastic Rock - Pyroclastic Flows Pegmatite

  15. Summary of Igneous Rock Texture and Composition

  16. Continental Large Igneous Provinces

  17. Geothermal Gradient

  18. Melting Temperatures (Dry Igneous Rocks)

  19. Melting Temperatures (Wet Igneous Rocks)

  20. Decompression melting

  21. The Role of Water

  22. Magmatic Differentiation and Assimilation

  23. The Andesite Line

  24. pillow basalt sheeted diabase dike swarms gabbro layered gabbro mantle peridotite, dunite, lherzolite, or hartzbergite. Structure of Oceanic Crust and Formation of Ophiolites

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