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← ScienceWhich consequence results when radioactive decay occurs in zircons extracted from granite?
A)Isochron age calculations become possible
B)Alpha damage causes crystal amorphization✓
C)Trace elements are expelled immediately
D)Lead isotopes diffuse out rapidly
💡 Explanation
Alpha decay causes structural damage within the zircon crystal lattice, leading to amorphization because helium ions displace atoms from their positions via alpha particles. Therefore alpha damage happens, rather than all trace elements being instantly expelled by thermal effects which occurs much later.
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