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Questions and Answers
What is the process of partial melting of the source rock called?
What is the process of partial melting of the source rock called?
- Fractional Melting
- Diversification Processes
- Anatexis (correct)
- Equilibrium Melting
What are the characteristics of Incomplete Equilibrium Melting?
What are the characteristics of Incomplete Equilibrium Melting?
- Continued reaction between solids and melt during the melting process
- Enrichment of high-T minerals in the melt
- Large crystal sizes and high magma viscosity (correct)
- Low ion migration rates and fractional melting
What does Equilibrium Melting involve?
What does Equilibrium Melting involve?
- Addition or removal of chemicals in an open system
- Enrichment of low-T minerals in the melt (correct)
- Progressive enrichment of refractory minerals in the solid residue
- Isolation of solids and melt into separate fractions
What does the Lever Rule calculate in a system?
What does the Lever Rule calculate in a system?
In Gibb’s phase rule, what does 'P' represent?
In Gibb’s phase rule, what does 'P' represent?
What happens to the enriched low-T minerals as the degree of partial melting increases in Equilibrium Melting?
What happens to the enriched low-T minerals as the degree of partial melting increases in Equilibrium Melting?
What is the main composition of magma according to the text?
What is the main composition of magma according to the text?
What type of equilibria allows both pressure and temperature to change independently without altering the state of the system?
What type of equilibria allows both pressure and temperature to change independently without altering the state of the system?
What is the primary cause of basaltic magma generation at ocean spreading ridges and continental rifts?
What is the primary cause of basaltic magma generation at ocean spreading ridges and continental rifts?
What effect does high volatile content under pressure have on melting temperature of rocks?
What effect does high volatile content under pressure have on melting temperature of rocks?
At what depth is the lithostatic stress reduced, leading to a decrease in rock melting temperature?
At what depth is the lithostatic stress reduced, leading to a decrease in rock melting temperature?
What does partial melting remove from the source rock and concentrate into the new magma?
What does partial melting remove from the source rock and concentrate into the new magma?
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