Mafic lavas are hot, high in silica, low in volatiles, and relatively viscous. Volcanic lavas are called felsic lavas, and they are usually cooler and include high levels of silica and volatiles.
What is the process of minerals crystallizing and evolving mafic compositions into intermediate felsic compositions? During this process, the overall composition of the magma near the top of the magma ...
Drilling intersected 240m of leucocratic gabbro and 1-2% pyrite-pyrrhotite with strong evidence of mafic-ultramafic magma mixing and brecciation throughout the hole (Photo 2). Drill hole 2 ...
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