We show that the Korevaar-Schoen limit of the sequence of equivariant
harmonic maps corresponding to a sequence of irreducible SL2(C)
representations of the fundamental group of a compact Riemannian manifold is an
equivariant harmonic map to an R-tree which is minimal and whose
length function is projectively equivalent to the Morgan-Shalen limit of the
sequence of representations. We then examine the implications of the existence
of a harmonic map when the action on the tree fixes an end.Comment: 12 pages. Latex. to appear in Math. Res. Let