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Yttrium and Niobium in Granite

 
 
Reply Tue 28 Apr, 2015 02:23 am
What could cause high levels of yttrium (about 130 ppm) and niobium (about 135 ppm) in a granite?
 
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farmerman
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Reply Tue 28 Apr, 2015 04:40 am
@EvilPenguinTrainer ,
Look up rare earth minerals in alkali granites (nd/or) pegmatite rocks.

Alkali feldpar granites (red granites) and flourite pegmatites sometimes contain minerals like Samarskite and Monazite. The conditions of origin of the hot melt rocks is a story with many possible scripts.

You should really look at the pecise granite block from which your specimens come from and see whats written about it. Theres usually a good series of genesis reports from the prospctors

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