The turbo is a large shaft and it could easily produce that much material if the bearings went on it, but it is not any looser than it was when I installed it.
The majority of the material is a bronze color so I think it must be a bearing or the thrust surface as suggested earlier. I guess rod ends could also cause it. I have seen a cam failure and it does not look like that to me right now. I suppose heat could make the pieces bronze in color, but most of it is not magnetic. Guess I will find out soon enough. I am going to get it ready to come out this weekend, but I have to get another engine off the stand and in another truck before I can pull this one. I will let ya'll know what I find in a week or two.