chimera,your deductions are true, its not the remnants of an...

chimera,your deductions are true, its not the remnants of an eroded deposite ,which is confirmed by the IP . What the actual nature is yet to be discovered , the silver assays all go well as to what is further down.
Andean started with finger like veins then the palm of the hand at the first area and gold only .the gold and silver was not too far away and lots of high grade of both.

so far all the signs are AAA+ IMO