Donner Minerals (DML.V) Message Board

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Gold/Mining/Energy : Donner Minerals (DML.V)

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To: The Osprey who wrote (9875)	11/29/1998 12:42:00 PM
From: 1king	Read Replies (2) of 11676

Osprey, The "trunk" I described may be a bit misleading in that there does not have to be a central conduit. There may be a central mega-stockwork zone which could be a kilometer or more in diameter with dykes interweaving with country rock. The proximity to surface is dependant on the erosional level, which at this scale can very from 0 to 1000+m over a property. These mafic dykes (dozens or hundreds) may or may not have any economic mineralization but they almost always have a pretty good EM signature. There does not appear to be any evidence that depth is a factor to the quality and quantity of mineralization other than the erosional level with respect to the stockwork system. The thickness of individual conduits varies as they and pinch and swell in all dimensions. This makes tracing "back to source" a little bit difficult! Remember a drill cut is only a few inches in diameter and we may be a 1000-2500ft from where we want to be in the stockwork. Because of variations in all dimensions directional indicators to the best mineralization are not always self-evident. A good pod of massive sulfides intercepted in one hole can, and does, disappear in a hole that cuts the same area less than 10m away! DML found that out in the past spring! It can be that variable. I am not sure what -96 represents, maybe it is next to a conduit that was not drilled yet?? The thick intersection of gabbro to the east on the MGJ ground is a good example. It looks like a dyke because of a couple of intersections however the surrounding gneiss may just be a block of gneiss floating in a stockwork system (remember the big scale we are working with here). The blocks can easily be several hundred meters thick and across in both dimensions. So it become difficult to "see the forest for the trees", so to speak. Sorry, this is not explained well but it is an important concept. They have drilled deeper but I am not sure how that fits into the picture, as I have not had the time to put all the drilling into context. The lab drilling is up in the air. I am not sure of the philosophy of the people directing the drilling. At this stage they are probably just anomaly chasing. They will evaluate the bullseye with a couple of holes, find some disseminated mineralization and then stop and think. Fortunately the winter is upon us so it may not look really negative in the big scheme of things. The LAB drilling is NOT part of any systematic exploration program, at this stage! 1King

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