1911 Gold Announces Mineral Resource Estimate Update for the True North Gold Project
Highlights
-
Underground MRE defined for the
True North Gold Project is reported within mineral resource constraining envelopes using a 2.25 grams per tonne ("g/t") Gold ("Au") threshold. All blocks within the envelopes are reported and tabulate as:- Indicated Mineral Resource of 3,516,000 t @ 4.41 g/t Au containing 499,000 ounces ("oz") Au
- Inferred Mineral Resource of 5,490,000 t @ 3.65 g/t Au containing 644,000 oz Au
- The MRE highlights areas with exploration targets for resource expansion both down plunge and along strike to the modeled veins and within areas with historic drillholes that require drilling prior to including them in future resource estimates
-
1911 Gold has started a surface drill program with target areas that include:- Gold mineralization intersected in historic drillholes that are in new target areas along strike from the resource and within 400 m of surface
- New targets identified during the vein modelling that are proximal to Au-bearing shear zones within favourable host rocks
-
Management will hold a webinar on
Tuesday, November 26, 2024 , at10:00am (EST) to present and review the results of this mineral resource estimate (details below)
Mineral Resource Estimate
The underground MRE resource is based on a drill hole database that was rebuilt by 1911 personnel (completed on
The updated resource is comprised of 66 modelled vein shapes. The geological interpretation of each vein incorporated the host lithologies, mineralization character, alteration style and structural features. The modelling was completed on cross-sections and level plans using drill hole data and detailed geology level maps drawn when the mine was in production. The level maps were also used to validate the vein traces and drill hole collar locations. The majority of the vein solids strike NW-SE or NE-SW (Figure 1) and plunge approximately 50 degrees to the NE or NW respectively. The mineralized gold trends tend to occur within shear zones and are hosted within favourable competent host rocks (gabbro, basalts and fragmental volcaniclastics). Three-dimension ("3D") modelling of the vein solids was generated in "Leapfrog Geo", a modelling software.
The underground MRE was completed on
Table 1:
Mineral Resource |
Tonnage |
Gold Grade
|
Contained Gold
|
(Category) |
(t) |
(g/t) |
(oz) |
Indicated Resources |
3,516,000 |
4.41 |
499,000 |
Inferred Resources |
5,490,000 |
3.65 |
727,000 |
Notes:
-
The effective date of the MRE is
August 29, 2024 , which is the date when all scientific and technical data was submitted toLions Gate Geological Consulting ("LGGC"). -
The MRE follows the
November 29, 2019 , CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines. - Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. There is no certainty that all or any part of the Mineral Resources estimated will be converted into Mineral Reserves. The estimate of Mineral Resources may be materially affected by environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant issues.
- The CIM definitions were followed for the classification of Indicated and Inferred Mineral Resources. Indicated Mineral Resources were assigned for blocks with three drill holes within 30 m (100 feet "ft") and inferred blocks were assigned for blocks with one drill hole within 46 m (150 ft).
- Ounces and tonnes have been rounded to the nearest 1,000 therefore sums in the table may not add-up due to rounding.
-
Resource constraining envelopes were built around contiguous clusters of blocks at a nominal cut-off grade of 2.25 g/t Au. The mineral resources are reported at a 0.00 g/t Au cut-off within the envelopes. The gold grade threshold for the resource envelopes of 2.25 g/t Au is based on assumptions of a gold price of
US$2,000 /oz, an exchange rate of US$/C$ 0.75 , mining operating costs ofC$132 /t, processing costs ofC$34 /t, G&A ofC$12 /t and average gold recoverability of 94%. The vein solids were built with a minimum width of 1.2 m. This same width was used for the mineral resource envelopes. - A bulk density of 2.76 t/m3 (0.086 short tons/ft3) was used to convert volumes to tonnes for all blocks in the mineral resource estimation.
- The assay gold values were capped to 342.5 g/t Au (10 oz/short ton) and a restricted outlier strategy was applied to each vein to restrict local extreme grades to 15 m (50 ft) from the composite.
- Gold grades were estimated into a 4.6 m (15 ft) block model using inverse distance squared (ID2) method and 0.46 m (1.5 ft) composited data restricted within the vein solids.
The MRE was completed using HxGN MinePlanTM 3D software and includes the estimation of gold grades into a 4.6 m block model (15x15x15 ft) using Inverse Distance Squared (ID2) method. Composites from a minimum of two drill holes was required for a block to be interpolated with a gold grade.
Prior to estimating block grades, potentially anomalous outlier grades were identified and their influences on the grade model was controlled during interpolation through the use of traditional top‐cutting and outlier restrictions. The assay gold values were capped to 342.5 g/t Au (10 oz/short ton). The composites for each of the estimated veins were reviewed by histogram/probability plot and a restricted outlier strategy was employed to limit the influence of extreme gold grades to 15 m (50 ft) from a composite location.
The resource constraining envelopes were built around contiguous clusters of blocks at a nominal cut-off grade of 2.25 g/t Au. The mineral resources reported in Table 1 are reported at a 0.00 g/t Au cut-off within the resource constraining envelopes as required by CIM guidelines for declaring an underground mineral resource estimate. The sensitivity of the block values within the 2.25 g/t Au resource constraining envelopes to gold grade is included Table 2. The block tabulations included in Table 2 do not constitute mineral resource estimates and are included to illustrate block grade sensitivity only within the 2.25 g/t Au envelopes.
Indicated Mineral Resources were assigned if a block was within 30 m (100 ft) of three drill holes and Inferred Mineral resources if a block was within 46 m (150 ft) of one drill hole.
Table 2: Sensitivity of the Block Model to Different Gold Grade Thresholds within the 2.25 g/t Resource Constraining Envelopes
Sensitivity
Gold Grade |
Indicated |
Inferred |
||||
Tonnage |
Gold
|
Contained |
Tonnage |
Gold
|
Contained |
|
(g/t) |
(t) |
(g/t) |
(oz) |
(t) |
(g/t) |
(oz) |
2.00 |
2,781,000 |
5.23 |
468,000 |
4,852,000 |
3.96 |
618,000 |
2.25 |
2,530,000 |
5.54 |
451,000 |
4,404,000 |
4.14 |
587,000 |
2.50 |
2,255,000 |
5.93 |
430,000 |
3,754,000 |
4.45 |
537,000 |
3.00 |
1,751,000 |
6.85 |
386,000 |
2,726,000 |
5.10 |
447,000 |
3.50 |
1,368,000 |
7.86 |
346,000 |
2,031,000 |
5.75 |
375,000 |
4.00 |
1,093,000 |
8.91 |
313,000 |
1,527,000 |
6.42 |
315,000 |
1. |
The block tabulations included above do not constitute mineral resource estimates and are included to illustrate block grade sensitivity within the 2.25 g/t Au resource constraining envelopes |
Mineral Resource Potential Discussion
The MRE has identified areas in the deposit where increased drill hole spacing could result in more blocks being interpolated with gold grades and increased levels of classification for some blocks. These areas lie close to the historic stopes in the mined areas of the project where blocks were not estimated due to uncertainty of the locations of the stope solids.
The potential for adding mineral resources proximal to areas of known mineralization and at new emerging targets will be reviewed through updated vein and structural interpretations and refinement of the geological understanding of the
The Company is planning a review of the underground facilities at
Future Plans
With the completion of the MRE the
Quality Assurance/Quality Controls (QA/QC) Procedures
All drill data that supports the mineral resource estimation were completed by previous operators and were drilled between 1994 and 2017. The majority of the drill holes were BQ sized core (1,895 DDHs) with a lesser number being AQ sized core (1,112 DDHs), NQ sized core (137 DDHs) and HQ sized core (11).
Both
About
Qualified Person Statement
The MRE was completed by
The technical information in this news release has been reviewed and approved by independent QP Susan Lomas,
An independent technical report prepared in accordance with the requirements of NI 43-101 will be completed within 45 days of this news release.
The scientific and technical information in this news release has been reviewed and approved by Mr.
Conference Call
The Company will host a conference call at
The conference call can be accessed as follows:
Topic: 1911 Gold Webinar to Discuss Updated Mineral Resource
When:
Please click the link below to join the webinar:
https://us02web.zoom.us/j/85125441318?pwd=q4S8CmbAn0sazUGcdgWpxprSgyoT0K.1
Passcode: 737616
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ON BEHALF OF THE BOARD OF DIRECTORS
President and CEO
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