We observe melting of a driven vortex lattice in amorphous Mo_x_Ge_1-x_ films down to near zero temperature using a mode-locking technique. We determine the dynamic melting line B_c,dyn_^{\infty}^(T) in nearly the whole field-temperature (B-T) phase diagram. At low T, B_c,dyn_^{\infty}^(T) shows a weak T dependence and is significantly suppressed compared to the mean field line B_{c2_(T) or the static ``melting" (depinning) line. The results indicate that {\it intrinsic} quantum melting of the vortex lattice decoupled from the underlying pinning potential occurs well below B_c2_ at T\rightarrow 0.
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