26.03.2013 Views

Igneous and Metamorphic Rocks

Igneous and Metamorphic Rocks

Igneous and Metamorphic Rocks

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Origin <strong>and</strong> Differentiation of Magma<br />

• Source rock composition p - what rocks were<br />

melted?<br />

• Partial melting - produces magmas of<br />

different composition than source rocks;<br />

more felsic or silicic.<br />

• Fractional crystallization - increases silica<br />

content of remaining melt. melt<br />

• Magma mixing<br />

• Assimilation - xenoliths fall into magma<br />

chamber

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!