1. Original artwork by Gary Hincks
Types of Igneous
Plutons
Volcano
Dikes
Laccolith
p d
Sills
Volcanic Pipe
Original artwork by Gary Hincks
Dikes
Batholith

2. Fig. 6.08b
Stephen Marshak

4. Original artwork by Gary Hincks
Types of Igneous
Plutons
Volcano
Dikes
Laccolith
p d
Sills
Volcanic Pipe
Original artwork by Gary Hincks
Dikes
Batholith

5. Fig. 6.10
W. W. Norton

6. Fig. 6.11a
Stephen Marshak

7. Fig. 6.11de
Paul Hoffmann

8. Fig. 6.18
W. W. Norton

9. Plate Tectonic Setting as a Context
For Magma Generation
3) Divergent margins:Melting of lithosphere along ocean spreading centers
4) Melting of lithosphere & crust beneath continental rift zones
1) Mantle plumes & hot-spots
2) Convergent margins: Subduction of slabs of lithosphere

10. Fig. 6.14ab
W. W. Norton

11. Fig. 6.04a W. W. Norton Ways To Melt Rock: Lower pressure
in the mantle
(e.g. along
divergent margins)
W. W. Norton

12. Fig. 6.03 W. W. Norton “Decompression melting”
Rock moving from point A to point B in the mantle sees a decrease in pressure.
Fig. 6.03
W. W. Norton
“Decompression
melting”

13. Fig. 6.04a W. W. Norton Ways To Melt Rock Raise the temperature
of the surrounding rock
to melting temperature
W. W. Norton

14. Ways To Melt Rocks
Fig. 6.04c
Add water!
W. W. Norton

15. Fig. 6.04b
W. W. Norton

16. Making Silica-rich Magmas
Fig. 6.05a
W. W. Norton
1) Partial melting of mafic, or ultramafic rocks.

17. Making Silica-rich Magmas:
2) Assimilation of
siliceous “country
rocks”

18. Fig. 6.09ab
W. W. Norton

19. Making Silica-rich Magmas
Fig. 6.05c
W. W. Norton
3) Fractional crystallization & gravity settling
of early formedmafic minerals.