What processes can form intermediate and felsic magmas from a melt that is originally mafic?

What will be an ideal response?


Fractional crystallization: Removal of early-formed, relatively low-silica minerals leaves a melt that is more silica-rich.
Magma assimilation: Mafic magma may melt more silica-rich surrounding rock; the resulting silica-rich melt blends with the originally mafic magma to produce an intermediate or felsic magma.
Magma mixing: A mafic magma may mix with a felsic magma to produce an intermediate magma.

Environmental & Atmospheric Sciences

You might also like to view...

Electric field lines about a tiny charged particle extend

A. in circles. B. outward when the charge is negative. C. outward when the charge is positive. D. none of the above

Environmental & Atmospheric Sciences

Of the following countries, the one that is culturally closest to the Romanians is:

A. Azerbaijan. B. Moldova. C. Latvia. D. Russia.

Environmental & Atmospheric Sciences

Earlier than 200 million years ago, the continents were joined into one supercontinent called ____

A) Pangaea B) Panthalassa C) Oceanus D) Tethys

Environmental & Atmospheric Sciences

What is the universe expanding into?

a. A black hole b. If we live in an infinite universe, then the universe expands into nothing c. If the universe is finite, then eventually it should reach a boundary d. A super universe e. Both b and c

Environmental & Atmospheric Sciences