I would be of the opinion it is free milling ore. Though, as for percentage of gold per weight of the ore; we are not there yet. Based on the region, I am quite sure there is a good deal of micron gold to be found. If this entire vein is micron gold it would be even more uncommon than finding it at all. We shall see. I am thinking there is visible gold and both silver and gold ore. Whether they are combined and need to be separated is most likely their origin to the main vein. It is definitely a whole bunch of things. I think if I dig more than a few feet I will have more than one classification. There is a lot of geological variables in a small area. Depends which way your pointing at it really. Some of this, some of that. The best part is it is all easily worked and accessible. Who knows, I am a hobbyist too and certainly would prefer to listen to any experts instead of claiming to be one. I will know more when I dig. XRF testing is only one analysis. Probably need to assay a nice sample for sure. I am going to a good bit of dry washing too. Take care.