List of top Geology Questions on Metamorphic Petrology asked in GATE GG

Which one of the following mineral reactions will result in the formation of a diagnostic granulite facies assemblage during regional metamorphism of a pelite?

The given schematic diagram shows different stages of development of S\(_2\) foliation after the formation of S\(_1\) foliation. Which of the following statements CORRECTLY interpret(s) the relationships of porphyroblasts W, X, Y and Z with the matrix?

During high-temperature metamorphism of pelites, which one of the following mineral reactions represents the second sillimanite isograd?

Which of the following textures suggest(s) post-kinematic growth of the mentioned mineral?

Given $\Delta V_r$ and $\Delta S_r$ are the volume and entropy of reaction, respectively, the most suitable conditions for the reaction to be used as a geothermometer are

At a depth of about 400 km inside the Earth, which one of the following occurs?

During contact metamorphism, with increasing temperature,

The following reaction takes place in the amphibolite grade of metamorphism of pelitic rocks:
\[ \text{kyanite + chlorite} \leftrightarrow \text{staurolite + quartz + H}_2\text{O} \] Which of the following is a CORRECT statement on this reaction?