The French Direct route was actualy passed on the 5th of july 1979 in a descant of a Yougoslav team who riched the top of Alpamayo by a new Kranj route (4 climbers) and another group of 7 climbers (6 Yougoslav, 1 Peruan) who climbed up the normal N ridge.
The descant ended with a spectacular jump over the bergschrund. See the attached photo and do not repeat, despite all the nice memories of the team.
Thomas, you're sure of the coordinates? in interactive map of google appear in the center of Quebrada de Sta cruz, I think is near of -8.8942S, -77.6658W in the map of google. check this