RE:RE:Thoughts - 1 km east of Orenada 2 Hey Goldhunter11,
Thanks for the thoughts.
1) High-grade quartz veins go beyond the shear zones and into the country rocks
The purple area in the video is ultramafic rock. It was the believe that the structure was not mineralized beyond this point. However, the 2015 Orenada study shows that high-grade quartz veins goes beyond this thin layer of ultramatic rock and well into the country rocks.
You can get a good look at this with the view at 1:55 of the video. You can also see that some of the current drill holes will be testing the quartz veins beyond the ultramatic rock. All of this should add ounces and grade to our Orenada resource profile.
´´The previously unrecognized occurrence of these veins beyond the boundaries of the host shear zone, into the adjacent country rocks´´
2) Existing Underground Shaft
My guess is that they likely wouldn`t be able to go deeper than 200m vertical depth for the Orenada 4 open pit, due to location of the shaft to the north. The mineralized zones start at the surface to the south and downplunge to the north.
It`s not 100% clear why they are showing such a shallow (and limited, length wise) pit for Orenada 2, but I have some ideas. There seems to be decent amounts of mineralization throughout the 600m length of Orenada 2 deposit. Though, I think the shear zone / mineralized envelope starts to dip down (towards the east) at the surface after about 300m. This could be why they are not showing at pit for the entire 600m Orenada length. As to why it is shallow, it could be that the mineralization tapers off a bit after the shallow pit and then picks up again at various places underground.
I think we will have a better mine plan, including with the open pits, after we have drilled using the new model.
3) Shear Zones vs Mineralized Envelopes vs Resource Areas vs Multiple Vertical Zones
This is likely why impression sizes on various documents seem odd at times.
I don`t have full clarity myself, but I have some ideas.
i believe the near-surface mineralization goes for about 350m length (before dipping/tapering down towards the east) at Orenada 4 and 600m for Orenada 2.
However, it gets tricky from there. For example, let`s take Orenada 4. As we know, the mineralization starts on the south side and downplunges to the north.
As the same time, we have to consider that the shear zone and mineralized envelope widens to the east (depth wise). It gets further tricky, as it seems like it is mainly the mineralized envolope that widens (depth wide) to the east while the shear zone mainly dips down to the east.
You can view this on the following 2 longitudinal maps.
The 2009 resource envelope:
Image:
Link, if image doesn`t show up:
https://i.ytimg.com/vi/MNpARk2Fo_s/hqdefault.jpg
I think the dark grey areas in this longitudinal could represent the the shear zones:
Image:
Link, if.....:
https://www.azx.ca/wp-content/uploads/2015/05/orenada_longitudinalsection.jpg
In this next image, the red outline seems to be overlayed on top of the blue/grey outline. The red could represent the near-surface mineralized resource while the longer outline could be the shear structure. I`m not exactly sure 100%.
Image:
Link, if......:
https://i.ytimg.com/vi/UDomnsiBKQE/hqdefault.jpg
Of course, after current drilling has been completed using the new model, all of these images could change (either significantly or slightly).
As a side note, I think the size of the Orenada 2 impression on pg 16 of the Sept 1 presentation looks like an outlier. I think the Orenada 2 impression profiled at 0:19 of the video is more consistent with everything else.
4) Orenada is a bulk tonnage deposit with high-grade quartz veins imbedded within the deposit
The resource cut-off grade is .5 g/t gold. The 2.0 g/t cut-off grade used in the video is for demonstration purposes. The video shows somewhat fat 2.0 g/t (and greater) structures (8 - 20m long) positioned all over the deposit. These structures are comprised of the high-grade quartz veins mixed with mineralized lower grade gold, which together average more than 2.0 g/t grade. However, when they mine the deposit, they will mine not only these 2.0 g/t (and greater) Au structures but they will mine all the gold down to .5 g/t grade (thus minimizing wastes (and the cost associated with moving wastes) within the deposit). This will generate economies for scale cost efficiencies (spreading out the fixed costs among greater units of production) results in lower cost per unit), as a bulk tonnage operation (yet benefiting from the high-grade quartz veins).
Here is direct link to the video on Alexandria`s Youtube site:
https://www.youtube.com/watch?v=UDomnsiBKQE