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Modern Concepts in Earth Science Igneous Rocks Formed in Rift Igneous Rocks Formed Above Subducting Plate Course 7 – Igneous Rocks.

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Presentation on theme: "Modern Concepts in Earth Science Igneous Rocks Formed in Rift Igneous Rocks Formed Above Subducting Plate Course 7 – Igneous Rocks."— Presentation transcript:

1 Modern Concepts in Earth Science Igneous Rocks Formed in Rift Igneous Rocks Formed Above Subducting Plate Course 7 – Igneous Rocks

2 Modern Concepts in Earth Science Extrusive Igneous Rock

3 Modern Concepts in Earth Science Intrusive Igneous Rock

4 Modern Concepts in Earth Science Bowen’s Reaction Series

5 Modern Concepts in Earth Science Igneous Rock Classification by Composition

6 Modern Concepts in Earth Science Gabbro Basalt Mafic Rocks

7 Modern Concepts in Earth Science Andesite Diorite Intermediate Rocks

8 Modern Concepts in Earth Science Granite Rhyolite Felsic Rocks

9 Modern Concepts in Earth Science Peridotite Komatiite Ultramafic Rocks

10 Modern Concepts in Earth Science Ternary Diagrams

11 Modern Concepts in Earth Science Modal Classification of Igneous Rocks (foid)-bearing Trachyte (foid)-bearing Latite (foid)-bearing Andesite/Basalt (Foid)ites 10 60 3565 10 20 60 F A P Q RhyoliteDacite TrachyteLatite Andesite/ Basalt Phonolite Tephrite Q = Quartz A = Alkali Feldspar F = Feldspathoids P = Plagioclase VolcanicPlutonic

12 Modern Concepts in Earth Science Igneous Textures Aphanitic texture - basalt Phaneritic texture - granite

13 Modern Concepts in Earth Science Porphyritic texture - Granite Volcanic Glass - Obsidian Igneous Textures

14 Modern Concepts in Earth Science Volcaniclastic Rock - Pyroclastic FlowsPegmatite Igneous Textures

15 Modern Concepts in Earth Science Summary of Igneous Rock Texture and Composition

16 Modern Concepts in Earth Science Continental Large Igneous Provinces

17 Modern Concepts in Earth Science Geothermal Gradient

18 Modern Concepts in Earth Science Melting Temperatures (Dry Igneous Rocks)

19 Modern Concepts in Earth Science Melting Temperatures (Wet Igneous Rocks)

20 Modern Concepts in Earth Science Decompression melting

21 Modern Concepts in Earth Science The Role of Water

22 Modern Concepts in Earth Science Magmatic Differentiation and Assimilation

23 Modern Concepts in Earth Science The Andesite Line

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

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