This tells me that there SHOULD be more gold at higher grades the deeper we go down the veins with the steepest dip. My logic behind this is, these veins will have better chances of hooking up with the main faults/source because of there angles. The other veins at shallower angles would allow gold to lazily flow into them whereas the steeper ones would be prone to more pressure from the solution event that took place to deposit the gold where it did. But, keep in mind its harder to push gold straight up versus pushing it side ways. Keep in mind gold is heavy, and for it to be this high of grade at near surface levels, it should be reasonable to beleive that it gets higher grade and more abundant closer to the source. Imagine, if you will, a volcano erupting, then quickly stopping after it let off its pressure. Where would most of the lava be after this event has taken place? And its not outside on the ground!

Table 5-1: Compiled Assay Data from the Tesoro 1996 Sampling Program