Question

fill in the blank question leftover metallic are released at the end of magma crystallization in a hot, mineral - rich fluid that fills cracks and voids in the surrounding rock. this fluid solidifies to form metal - rich quartz .

Explanation:

The first blank refers to "fluids" (since leftover metallic fluids are released), and the second blank is "veins" (as the solidified fluid forms metal - rich quartz veins in rock cracks/voids, based on geological processes of magma crystallization and mineral deposition).

Answer:

First blank: fluids
Second blank: veins