During Metamorphism, What Is the Major Effect of Chemically Active

question 43

Multiple Choice

During metamorphism, what is the major effect of chemically active fluids like water and carbon dioxide?

• A) aid in the movement of dissolved ions and silicate constituents from parent minerals and facilitate growth of new metamorphic mineral grains
• B) facilitate the formation of schistosity and gneissic banding in hornfels and skarns
• C) increase the pressures in deeply buried, regional- metamorphic zones
• D) prevent partial melting so solid rocks can undergo very high temperature regional metamorphism

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