posted on
Jun 26, 2011 12:58PM

Welcome To the WIN!!! St. Elias Mines HUB On AGORACOM
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Message: Trenching
This part of your post;
[I am also hoping that along with the trenching samples, we manage to get a number of bulk samples sent off to Dynacor for assaying as well. That would just be more icing on the cake. I can't wait to start getting the sample results. Keep in mind as I posted awhile back, if we manage to show a disseminated gold content from the trenching, anywhere near 1g/t for this property. That would be absolutely incredible.]
It is my understanding that BULK SAMPLES are being taking along the trenching where veins are encountered. Trenching on the Tesoro I would suggest is going perpendicular to the veins, or across them testing the soil in between veins with a small soil sample and testing the veins with a larger bulk sample.
These bulk samples are gonna be extremely important too! You will get a mining grade of the sampled vein material from these if taken properly. Put these in conjunction with your soil samples taken every 5 meters and you have a COMPLETE GRID sampling project. MEANING, you dont have to sample this anymore at the surface and should be indicative of the LOWEST GRADES on the verticle.
If you have a 50 meter trench with soil samples every 5 meters coming back at an average grade of .5 g/t and have 2 bulk samples to throw in there in that same distance at an average grade of 20 g/t, on quick math, you probably now have an average grade of .8 g/t. This is well above an economical open pit grade which starts at .3 g/t for some projects. As a matter of fact it is double the lowest grade needed to be economical. Also keep in mind that if the POG keeps going higher, .1 g/t could be economical when the buyer of the Tesoro decides to mine it.
We have a lot of pinch and swell in the veins at Tesoro and many splays. If a swell is encountered during a bulk sample it could put your grade of that sample much higher as a pinch could put it much lower. The average is whats important to cut that factor down to what would be a more reasonable grade over distance. Some of these splays could be extremely high grade with rich veinlets too, these type of structures will have to be considered when doing an analysis, if available to us.
IMO
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