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Questions and Answers
What is the principal factor of metamorphism that leads to changes in mineralogy and/or texture?
What is the principal factor of metamorphism that leads to changes in mineralogy and/or texture?
- Presence of volatiles
- Pressure
- Temperature (correct)
- Chemical active fluids
What is the lower limit of temperature for metamorphism, considering the original protolith?
What is the lower limit of temperature for metamorphism, considering the original protolith?
- Beginning of melting, 650-1100 °C
- Higher T (Igneous rocks and carbonates)
- 150±50 °C (correct)
- Lower T (shale, organic matters)
At what pressure and in the presence of what fluid do granites begin to melt?
At what pressure and in the presence of what fluid do granites begin to melt?
- 5 kbar and presence of aqueous fluid (correct)
- 3 kbar and absence of aqueous fluid
- 7 kbar and presence of CO2 fluid
- 10 kbar and presence of high-temperature fluid
What is the process of extensive chemical changes during metamorphic transformation known as?
What is the process of extensive chemical changes during metamorphic transformation known as?
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What are the limits of temperature for metamorphism?
What are the limits of temperature for metamorphism?
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