Blanc told Sud-Ouest: "Marouane will still be under contract with Les Girondins next season.
"Him moving is totally out of question. He is an extremely productive player."
For his part, Chamakh said: "We will certainly be speaking with the club about a contract extension but it's still too early to speak about it.
"If one day I was to move on, for sure it will be for England. But this doesn't mean that I'm desperate to leave.
"It will depend on the opportunities that will arise."