Remaining 1815 tonnes estimateExpanding on blue0987’s recent post (see below) I thought I would do a rough calculation on the amount of gold in the remaining 1815 tonnes of the bulk sample.
According to comments by Joe Ovsenek during the Q&A of the Nov 13, 2013 Cowen Presentation (see link below), Pretium has mined approx 1000 tonnes of the Cleopatra vein but cannot ship without permits. He said this material runs approx 300 to 500 g/t.
https://wsw.com/webcast/cowen13/PVG/
I agree with blue0987’s comments that it looks like Pretium has left the bottom 2/3 of 615xc cross cut (below 615 E-L lateral- see drawing in link below) that contains the Cleopatra vein for processing in this last 1815 tonne batch.
https://media3.marketwire.com/docs/pvg1022-F1.pdf
This drawing also shows the “Cleo Drift” coming off 615xc cross cut.
From this drawing I scaled off the relative widths of the 615xc cross cut and the “Cleo Drift”. I found the 615xc cross cut to be approx 1.6x of the width of “Cleo Drift” for most of the length of the Cleo Drift.
Assuming that the additional width of the 615xc cross cut (as compared to the Cleo Drift) contains no gold (to be conservative) here is my quick & dirty calculation:
1815 tonnes/1.6= 1134 tonnes grading 300 to 500 g/t
1134 tonnes x 300 g/t= 340,200 g or 10,939 troy oz
1134 tonnes x 500 g/t= 567,000 g or 18,232 troy oz
I know this calculation has its limitations but it just looks to me that this last 1815 tonnes batch will contain more gold than the first 8000 tonnes.
JMHO
blue0987
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RE:RE:RE:Comment found on IV Precious Metals Board
As reported in the 10/22 press release:
https://www.pretivm.com/news/news-details/2013/Pretium-Resources-Inc-First-Bulk-Sample-Cross-Cut-Processing-Results/default.aspx we know that 585,555, & 645 were the first 3 cross-cuts used for the BS, leaving 615xc & 615el to follow. We also know the total tons that have been shipped to the mill, 8,090. Leaving 1815 tons remaining to be processed. Now looking at the level plan view of the bulk sample area with Feasibility Study stope shapes see the following link:
https://media3.marketwire.com/docs/pvg1022-F1.pdf. The cross cut 615xc with the cleo vein is the longest with the most tonage, (2600-2700 tons), with the 615el tonage @ approx. 1200 tons. So there's1815 tons left to process, Pretivm has already hit it's target of well over 4000 oz's of gold, With top management team @ Pretivm, I believe they left the bottom 2/3 of 615xc cross cut, (cleo vein), starting right below 615el lateral cut for last, seeing if there target could be met without using most of cleo. That last 2/3's of 615xc has aprox. 1800 tons in it. If this is how management played it out, what we have is that even without the cleo, the target of 4,000 oz's was met, which of course would put them in much better shape going forward, by verifying Snowden's numbers.
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