Not directly, but...
...ice plain might not be shaped like a basalt plain. Might have different surface roughness, etc.
And when you add radar data to neutron/gamma mapping from Odssey, you might be able to rule out some interpretations for some areas.
I like your gravitometric idea, but I don't see us sending a mission that can map to much resolution any time soon. GRACE would be a great mission to clone to Mars, but unfortunately, it relies heavily on GPS.
Even so, we are collecting lots of Mars datasets, and they can be combined in ways that people have not even thought of yet. All is not lost.