Minimization of anisotropic energies in classes of rectifiable varifolds

We consider the minimization problem of an anisotropic energy in classes of $d$-rectifiable varifolds in ${\mathbb{R}}^n$, closed under Lipschitz deformations and encoding a suitable notion of boundary. We prove that any minimizing sequence with density uniformly bounded from below converges (up to subsequences) to a $d$-rectifiable varifold. Moreover, the limiting varifold is integral, provided the minimizing sequence is made of integral varifolds with uniformly locally bounded anisotropic first variation.