Questions tagged [magmatism]

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What causes a change in composition from basanite to nephelinite?

Can the change in composition from basanite to nephelinite (i.e. increasing alkalis with decreasing SiO2) be explained in terms of fractional crystallisation, or only by a decreasing degree of partial ...
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What is solidus and liquidus temperature of granite?

My understanding is that because a rock is composed of variety of minerals, so it does not have fix melting point, rather there is a range below which whole rock is solid and above which whole rock is ...
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What are phyical properties of the adakitic melts?

I want to learn the physical properties (viscosity, temperature, volatile content) of adakitic melts. Which describes the type of the volcanic activity that caused by adakitic melts, effusive or ...