Pavon Gold Project

The Pavon property, located in central Nicaragua, is a low sulphidation system. Seventy one historical diamond drill holes totalling approximately 10,700 metres tested veins occurring over a strike length of six kilometres, with results that include 10.3 g/t gold over 16.8 metres in hole PADH-005B in the north zone and up to 6.7 g/t gold over 11 metres in hole PADH-01 in the south zone. During 2009 and 2010, we further explored the Pavon North and South Zones with 56 trenches totalling 1,608 metres. No exploration was carried out on the Pavon properties in 2012. Work was focussed on permitting for the drilling and small scale mining of Pavon.(1)

The Pavon property is located within the Natividad and Las Brisas exploration concessions totaling 31.5km2

After initial site visits and further review Calibre believes there is excellent potential to quickly advance the Pavon Gold Project. Pavon is located approximately 227 km from the El Limon Mine and 300 km from the La Libertad mine. B2Gold had historically and internally studied the potential to open pit mine at Pavon and truck the high-grade material to one of the processing facilities in country. Calibre is in the process of reviewing this potential opportunity and there are no certainties this can be done. Calibre is working on various permits to begin work again on the Pavon project and will be updating the market and progress and milestones are met. Calibre recently updated the NI 43-101 Resource Estimate at Pavon see details below.

July 28, 2020 Calibre Mining announced that the key environmental permit (Environmental Impact Assessment) had been approved for the development and production of Pavon Norte from the Ministry of the Environment and Natural Resources in Nicaragua

During the fourth quarter of 2019, Calibre initiated an Environmental Impact Assessment on the Pavon Gold Project. In addition, Calibre announced an updated resource estimate, which defined indicated resources totaling 1.39 million tonnes at 5.16 g/t Au containing 230,000 ounces of gold, and inferred resources totaling 0.57 million tonnes at 3.38 g/t Au containing 62,000 ounces of gold. The independent Technical Report on the Pavon Gold Project (written in accordance with National Instrument 43-101 standards), titled “Pavon Gold Project, Resource Estimation, Nicaragua” dated January 9, 2020 and effective November 12, 2019, prepared by WSP Canada Inc. is available at www.sedar.com under Calibre’s profile or on the Company’s website at www.calibremining.com.

Since the beginning of 2020, Calibre has continued to progress development at Pavon Norte, working closely with SLR Consulting (Canada) Ltd. (formerly Roscoe Postle Associates Inc.), WSP Canada Inc. and the Centre for an Understanding with Nature in Nicaragua, to ensure quality engineering designs with minimal impacts to the environment. Calibre has advanced engineering studies, mine plans, road construction designs, and socio-environmental initiatives focusing on water conservation and sustainable forestry and ranching. With road construction to the project currently underway, Calibre is well-positioned to commence open-pit ore production from Pavon Norte in the first quarter of 2021.

Calibre has also received the required permits to commence drilling on the Natividad mineral concession, the 1,300-hectare land parcel on which the Pavon Norte Gold Project is located. During the third quarter of 2020, a resource infill, geotechnical and waste dump condemnation drilling program will commence in support of the Pre-Feasibility Study, which is scheduled to be completed during the fourth quarter of 2020.

Calibre has identified the potential for resource expansion along strike and at depth and expects exploration drilling to commence during the fourth quarter of 2020.

December 2019 - Calibre Mining Announced a 318% Increase in the Pavon Gold Project Indicated Resource to 230,000 ounces Grading 5.16 g/t Gold

Table1   Comparison Between 2019 and 2014 Pavon Mineral Resource

    Tonnes (‘000s)       Au Grade (g/t)       Contained Au Ounces (‘000s)  
Indicated Mineral Resources Dec
2019 (3)
Prior
Report
(1)(2)
Change %   Dec
2019 (3)
Prior
Report
(1)(2)
Change %   Dec
2019 (3)
Prior
Report
(1)(2)
Change %
Pavon 1,388 290 379   5.16 5.82 -11%   230 55 318
Inferred Mineral Resources Dec
2019 (3)
Prior
Report
(1)(2)
Change %   Dec
2019 (3)
Prior
Report
(1)(2)
Change %   Dec
2019 (3)
Prior
Report
(1)(2)
Change %
Pavon 567 130 336%   3.38 5.5 -38%   62 23 170%

Notes:
(1)  Mineral Resource estimates were compiled as of November 14, 2014.
(2)  Mineral Resources are constrained within a pit shell and reported above a cut-off grade of 2.0 g/t gold, which was calculated using estimated project costs and a gold price of US$1,500 per ounce.
(3)  Mineral Resources are constrained within a pit shell and reported above a cut-off grade of 1.15 g/t gold, which was calculated using estimated project costs and a gold price of US$1,400 per ounce.

The Company plans to commence resource expansion drilling in July 2020 with a budget of 15,000 metres at an estimated cost of US$3.75 million.

Table 2   2019 Pavon Mineral Resource Summary

Classification Domain Rock Code Tonnes Au
(g/t)
Ag
(g/t)
Au (Ounces) Ag (ounces)
Indicated Pavon North Saprolite 260,000 3.46 2.16 28,914 18,056
Vein 612,000 3.58 5.82 70,418 114,563
Total 872,000 3.54 4.73 99,332 132,619
Pavon Central Saprolite 65,000 4.49 5.31 9,374 11,106
Vein 451,000 8.38 13.88 121,469 201,191
Total 516,000 7.89 12.80 130,843 212,297
Total Saprolite 325,000 3.66 2.79 38,288 29,162
Vein 1,063,000 5.61 9.24 191,887 315,754
Total 1,388,000 5.16 7.73 230,175 344,915

 

             
Inferred Pavon North Saprolite 47,000 2.41 4.02 3,644 6,070
Vein 113,000 3.46 5.85 12,563 21,249
Total 160,000 3.15 5.31 16,207 27,318
Pavon Central Saprolite 61,000 4.96 4.48 9,720 8,786
Vein 89,000 4.20 9.98 12,007 28,566
Total 150,000 4.51 7.74 21,727 37,352
Pavon South Vein 257,000 2.87 2.98 23,690 24,623
Total 257,000 2.87 2.98 23,690 24,623
Total Total 567,000 3.38 4.90 61,624 89,293

Mineral Resource Estimate Notes:
(1)  Mineral Resources were prepared in accordance with NI 43-101 and the CIM Definition Standards (2014).  Mineral resources that are not mineral reserves do not have demonstrated economic viability.
(2)  This estimate of mineral resources may be materially affected by environmental, permitting, legal, title, taxation, sociopolitical, marketing, or other relevant issues.
(3)  Open pit Mineral Resources are reported at a cut-off grade of 1.15 g/t gold that is based on a gold price of US$1,400/oz, an operating cost of US$50.68/tonne and a gold processing recovery factor of 94%.
(4)  Appropriate mining costs, processing costs, metal recoveries, and inter ramp pit slope angles were used by WSP to generate the pit shell.
(5)  Rounding may result in apparent summation differences between tonnes, grade, and contained metal content.
(6)  Tonnage and grade measurements are in metric units.  Contained gold ounces are in troy ounces.
(7)  Composites completed at 2 m down the hole.
(8)  Contributing assay composites were capped at 29.03 g/t Au at Pavon North, 75 g/t Au at Pavon Central and 17.18 g/t Au at Pavon South.
(9)  A specific gravity value of 2.49 was applied to all blocks in rock and 2.30 was applied to all blocks in saprolite.
(10)  Modeling was performed use in GEOVIA Surpac 2019 software with grades estimated using ordinary kriging (OK) interpolation methodology.
(11)  Blocks are 5x5x5 with 2 sub-blocks.

In 2014, 7 samples from Pavon North were submitted to SGS Lakefield for metallurgical test work with a focus on the amenability of the material to whole ore cyanidation.  The samples responded well to the plant conditions with average gold and silver extraction of 95.4% and 76.3% respectively.

A Technical Report prepared in accordance with NI 43-101 for the Pavon Gold Project will be filed on SEDAR (www.sedar.com) within 45 days of the December 3 2019 News Release.

Pavon Gold Project Plan Map

Highlight Drill Results Expansion Potential

  • 19.37m @ 13.19g/t Au, 7.88m @ 16.12g/t Au, 20.02m @ 4.74g/t Au, 6.40m @ 8.13g/t Au, 3.10m @ 11.18g/t Au, 3.46m @ 6.09g/t Au,  7.57m @ 4.24g/t Au 

Calibre Mining see excellent exploration potential along strike and down plunge on a number of the zones. Additionally a parallel low sulphidation vein structure known as the Victoria zone has limited drilling and excellent potential to expand. Current limited drilling at the Victoria zone includes: 3.10m grading 11.18g/t gold, 3.46m grading 6.09g/t gold, 7.57m grading 4.24g/t gold. All drilling to date has been less than 100m vertically from surface and is open along strike and down plunge.


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