Post by
Wangotango67 on Dec 25, 2021 10:19pm
OPEN PITTING - WHAT IF ?
Last eve i decided to review the 2016 43 101 ( Rowan )
I wanted to see if there was any possibility to remodel the Rowan - open pit format.
I guess i wanted to see what it would look like compared to -
First Mining's - Springpole Project in Red Lake..
Modelled open pit
3.8 mil ounces
0.97/g tonne ( just under 1 gram )
SPRINGPOLE
https://www.firstmininggold.com/news/releases/first-mining-announces-positive-pre-feasibility-study--for-the-springpole-gold-project-ontario-canada
ROWAN 43 101 - 2016 - TECH REPORT
https://www.westredlakegold.com/site/assets/files/1538/technical-report-and-resource-estimate-16-february-2016.pdf
With in the tech report - Rowan is pegged at -
1.1 million ounces @ 7.57 grams
4,468,500 tonnes
Now, i decided to see if there were more gold ounces if i chose to chase all grams from about
2 grams and up - Page 71 - 74 outlines rach level below grade.... I chose levels,
100 z - ( appears on side of hill )
100a - 200b - 300c - 400d - Approx 2 grams with larger tonnages.
I managed to increase the gold ounces to just under,
1.4 - million ounces.
Again, i am trying to see if an open pit modelling is better.
Some may think that chasing the high grade gold with less tonnage is far better, but...
I'm looking at this from the angle of, acquiring as much gold as possible and employing
ORE SORTING measures to reduce the ores in extraction circuit.
One can look at carving below grade only singling out the high grade reducing the tonnage - trying at best to manouver stopes to reach the gold at most likely $1200/tonne Cdn.
Or, one could run an open pit model @ an approc $750/tonne Cdn
And, introduce ore sorting to cut a good portion of the waste ores.
First Mining's Springpole is only 0.97 grams average.
The question is put forth, what would RGL look like if they targeted a 2 gram average ?
Ahhhhh..... 2 grams provides a far better buffer than 1 gram - right ?
Based on drill plot diagrams in the 2016 tech report
i'm seeing a good - 450m core x 200n depth
What i don't have is the - surface width
I don't know what the engineers were thinking - but perhaps a new block modelling is in order
to properly depict the outlay of the resource in 3D mode.
Would be nice to see the 5 zones mentioned above -
100 z ( appears aside of - hill - other 4 - 100a 200b 300c 400d - levels below grade
Second question put forth,
could the hill to the right side assist with an open pit model ?
Could RLG come into the side of the hill where zone 100z is located and strip / delineate on an incline vs open pit model with circular roads ?
RLG's cut off is allocated @ 3/g
With open pitting this most certainly could be revided.
Obviously with the intent to target 2 grams and up.
Here is an excerpt from - page 57 - 2016 tech report
The data was re- interpreted, using the above parameters, on sections spaced 20 to 50 meters apart. The mineralized zones consist of seven sub-parallel and relatively narrow veins across an area of 200 to 800m, and strike length of up to 1800m.
The mining model for the deposit is assumed to be underground narrow long hole mining method. The mineralized intersections are based a minimum true width of 1.5m. To maintain zone continuity, the vein solids are projected through holes which have low or no assay values.
And there it is....
Mining model is based on - 1.5 m true width.
My curious question is....
Were the widths of under - 1.5m - incorporated into the resource size ?
It does state - they used long hole mining as a method and i would assume anything under 1.5 meters they wouldn't chase or model the stopes to target 1.5 meter veins ?
If so... and i maybe wrong, but....
Has anyone seen how many intercepts there are under 1.5 meters ( over the years of drilling )
Yeah.... i seen lots.
Which begs....
Were these ever grouped if in close vicinity to other intercepts to accomodate a 1.5 meter ?
EG- 1.2 meter intercept @ 152m - 153.2m 44/g
1.4m intercept @ 155m - 156.4m @ 77/g
Would the long hole stope mining program cojoin these two zone since so close to another
to accommodate a 1.5 meter qualify ? Or, were all the under 1.5 intercepts excluded ?
4 New Subjects -
1 - could the Rowan be modelled for - open pitting - 450mL X 200m D ? ( surface width ??? )
2 - How would RLG's deposit compare to - Springpole ?
3 - How much cheaper would it be ot mine - open pitting vs long stope hole ?
4 - if the cut off was place to - 0,5/g open pitting what would the numbers look like ?
5 - were the intercepts - under 1.5 meters - factored into last inferred resource ?
6 - how many intercepts were under - 1.5 m - lots, many with big grams....!
7 - what would the diagrams look like if all grams under 3 grams were plotted ?
8 - would the size of resource increase if gold intercepts under 3/g were plotted ?
9 - how many more ounces would there be if 2 - 2.5 - grams were included ?
10 - what about al lthe one gram intercepts ?
11 - introducing - open pitting - wit h the use of - ore sorting - how much waste ores could
be shaved off, to minimize a good portion of wastes ore from entering - extraction circuit ?
How would the Rowan look if a new - open pit - mine model were introduced ?
Could an ore sorted make it al lthe more attractive ?
If it could - and if a 2 gram average was modelled - it would be one level up from the Springpole which has under a gram average.
i also noticed another diagran in the tech report that depicted the outline of what the partnership shares based on lands - yup.... the NT zone would be apart of the Rowan.
Which also begs the question - if the NT was mentioned in video as a potential open pit - and the what if the Rowan was modelled the same - and both modelled for a targeted 2/g -
just what exactly would be the - resource size between both deposits ?
Would RLG be close to that sweet spot of - 2 million oz ?
I carved close to 1.4 million ounces using under 4 grams + larger tonnage.
What would the NT zone have in ounces ?
I also scanned the Battle North deal...
What a bargain Evolution recieved.
Thank God, GBR is seeing an offer without even a resource size.
I wonder if, Kinross and Barrick would ever join forces ?
Nowe that Barrick has squeezed into BTU - and Kinross taking GBR.
Both of these projects are side by side.
Gold Corp, is stil lpresent.
Pure Gold, is up n coming.
Yamana, lingers with a sizable resource but - about a gram average.
And then there's Equinox, with a good sixe resource - about a gram average.
Could be a smart move for RLG to remodel thier Rowan + NT with a 2 gram averaging and still place themselves above the roster list have double the grade of most nearby peers.
PAGE 67 - TECH REPORT - gold gram values -
what would this look like if coloured in with 2 grams and up ?
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PAGE 58 - TECH REPORT -
One can clearly see a good - 350m core zone x 200m deep.
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Not investment advice....
If i've errored it's not intentional, please chime in to correct.
New to this stock.
Thanks...
In closing...
I would think the best bang for buck would be....
RLG not doing thier ususal raise at end of year... but rather... dropping a tad on - revamping the 43 101 - revising it with an open pit model, ore sortingt ominimize waste ores, and 1 gram and up inclusion. Yeah.. thatr kind of revamp. Ya never know.. could attract another interest.
Cheers....
Oh, almost forgot....
my theory of displacement / replacement depoist - would apply to the NT zone - if the main Rowan has the larger vein/ fault system and watershed potentially passe through the lower elevation - the fractured breccia would move easterly then, southerly at the dog leg - based on a few of the photos and on saltelite - there is a large swath that appears - cut - can;t help but think the area was carved by water - and fragmented ores washed towards the NT zone - i maybe wrong - just a theory.... Would love to se ethe cores from the NT zone ot see if the breccia is showing itself.