Given that we really do not know exactly where the initial bottom of either, especially DE1 actually is, nor if any of the drilling on De1 has defined the initial or present bottom of the deposit it is difficult to say they will not find more mineral types in the deposit. Likely we know what minerals are there but looking at the photos on Noronts website, the crystals visable are quite large and suggest a very long cooling time/rate. Also given that there appears to be several layers or zones of mineralization along most core lengths there appears to be separation caused by one or more of several methods or due to more than one flow or thrust of magma/hydrothermal activity, etc. When trying to interpret possable mechanisms with my considerably limited knowledge I can but thing of possabilities. And with that I fear trying to be any more then remotely general in my thinking. While it is fun to have a line of thinking to build around it gets increasingly problematic when considering that more than one event went into the result we see today. DE 1 and De 2 are likely due to the same basic event based on the description we have been given to date. Differential separation appears to be persent but considerable mixing is present as well. The zinc also being in the area suggests more likely that there was more than one event or the single event had a very long life and consequently the time to cause/allow essentially two or more depositions to be involved (and large crystal sizes lends support to prolonged event(s) theorizing as well). Host rock characteristics are an additional consideration in terms of their initial composition and porosity etc..
And then the likely great depth at which all this initially took place with subsequent additional pressures, reworking, and surface abrasion/erosion. I wish I had better Geochemical processes knowledge to better consider how these processes would/could work in the likely type of environment where the mineralization cooured but as that is not the case, I have to depend on the thinking of others and on how well they can stimulate some comprehension of such processes.
The NI 43 101 hopefully will give more info/data all in one place to help in these tinds of speculations.
Old Joe
