Download presentation
Presentation is loading. Please wait.
1
Igneous Processes ll Phil Simon A. Condat
2
What is Magma -Molten or partially molten rock -silicate liquid
-carbonate and sulfide melts -lava
3
How does magma form Heat transfer Decompression melting
-upward movement -rises to an area of low pressure (convention) -overlying pressure/ decompression -divergent boundaries Heat transfer -hot, liquid rock intrudes into Earth’s cold crust -melts the surrounding rock -convergent boundaries Flux melting When H2O or CO2 are added to rock Rocks melt at lower temperature -subduction zones
4
Magmatic Differentiation
Minerals crystallize out of the melt - different ingredients separating suggestkeyword.com geologyclass.org
5
Magma mixing 2 or more magmas Different chemical compositions “Mix”
Compositions intermediate between end members basalt and rhyolite tend to inhibit mixing lavamagmainfo.weebly.com
6
Magma assimilation -Melts surrounding rocks
-Minerals become part of magma
7
Bowen’s Reaction Series
Norman L. Bowen (geologist) -”minerals crystallize differently as they cool.” sirismm.si.edu studyblue.com
8
Ultramafic – Fe, Mg. Ca Intermediate – combination
Continuous series Discontinuous series Residual phases Ultramafic – Fe, Mg. Ca Intermediate – combination Mafic – Fe, Mg, Ca Felsic – Si, Na,Al, K
9
References http://www.britannica.com/science/magma-rock#ref74566/
hedcenscience.wordpress.com
10
Thank you for listening!
maxisciences.com
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.