The correct answer is: A. metasomatic metamorphism.
Metasomatism is a type of metamorphism that involves the chemical replacement of elements in rock minerals when gases and liquids permute into bedrock. This can happen when magma or hydrothermal fluids come into contact with existing rocks, or when rocks are buried deep in the Earth’s crust and subjected to high temperatures and pressures.
Metasomatism can produce a wide variety of new minerals, and it can also change the texture of rocks. It is an important process in the formation of ore deposits, and it can also play a role in the development of oil and gas fields.
Here is a brief explanation of each option:
- A. Metasomatic metamorphism: This is the type of metamorphism that involves the chemical replacement of elements in rock minerals when gases and liquids permute into bedrock.
- B. Dynamic metamorphism: This is the type of metamorphism that is caused by the deformation of rocks, such as when they are folded or faulted.
- C. Thermal metamorphism: This is the type of metamorphism that is caused by heat, such as when rocks are buried deep in the Earth’s crust.
- D. Contact metamorphism: This is the type of metamorphism that is caused by the heat and fluids from a nearby igneous intrusion.