Magma Origination

Describe how magma originates at intraplate zones of volcanism.

a. What process generates magma at divergent pb?

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b. Where does melting occur?

c. What is the composition of the magma that forms from partial melting?

What is partial melting ultimately controlled by?

a. What are the two “rules” of partial melting?

b. How does the composition influence melting? In other words, what mineral composition melts first and why?

 

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