Chapter 8: Major Elements - Faculty web pages
Chapter 8: Major Elements - Faculty web pages
Chapter 8: Major Elements - Faculty web pages
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Metamorphism of Mafic Rocks<br />
<br />
<br />
Most common minerals in mafic rocks show solid solution<br />
so metabasites have fewer phases than pelites.<br />
Result is fewer reactions and isograds<br />
<br />
Hydration of original mafic minerals required for the development<br />
of the metamorphic mineral assemblages of most facies<br />
<br />
If water is unavailable, mafic igneous rocks will remain largely<br />
unaffected in metamorphic terranes, even as associated sediments<br />
are metamorphosed.<br />
<br />
Coarse-grained intrusives are not permeable, and more likely to<br />
resist metamorphic changes<br />
<br />
Tuffs and graywackes are the most susceptible