I'm not speculating on or pointing to cause or even what happened yet as there is no information to do so, but I am trying to resolve the question of the nature of the accident site which looks like a high-speed impact but which doesn't square with the phase of flight.
One needs to parse these kinds of questions down between energy and speed to get a hint as to how the aircraft impacted the ground from a flight regime.
The best way to do this is to look at the vectors of the impact.
Considering a ground contact from a flight on approach or go-arround the questions are nose up or nose down? High velocity forward vs vertical velocity down and of course roll if any.
I haven't seen enough photos from the Libian accident to draw any conclusions in comparisons and probably by the time I see any, the on-scene investigators will already have those answers and be working towards the cause.