Tinka Reports Final Drill Hole Results from 11,000 metre Drill Program and Provides Exploration Update

VANCOUVER, BC / ACCESSWIRE / August 17, 2023 / Tinka Resources Limited ("Tinka" or the "Company") (TSXV:TK)(BVL:TK)(OTCQB:TKRFF) is pleased to announce results for the final three drill holes of the 11,000-metre 2022-2023 drill program at South Ayawilca and to provide an update on the Company's ongoing exploration activities. The recent drill campaign at Ayawilca was completed at the end of May 2023. The Company is now focused on completing a Mineral Resource update for the Ayawilca deposit and revising future mining scenarios via a desktop trade-off study. Exploration is also continuing at the Company's nearby Silvia copper-gold project.

Drill results from the "Silver Zone" at South Ayawilca were highly encouraging with a high-grade silver intercept in a 150-metre step-out in hole A22-195. The other two new holes reported here, A23-221 and A23-223, intersected high-grade "Zinc Zone" mineralization in resource confirmation holes. All drill hole results have now been incorporated into a revised geological model for the Ayawilca deposit, and an independent consultant is currently updating the Mineral Resource estimation for the Zinc and Tin Zones.

Key Highlights:

Zinc Zone

• Hole A23-223: 21.6 metres at 6.6% zinc and 18 g/t silver from 254.0 metres depth, including
  • 7.6 metres at 10.7% zinc and 18 g/t silver from 268.0 metres depth.
• Hole A23-221: 13.8 metres at 6.8% zinc from 290.2 metres depth.

Silver Zone

• Hole A22-195: 3.4 metres at 465 g/t silver from 209.7 metres in a 150-metre step-out hole.
• The Silver Zone is interpreted as a subvertical, northeast-trending structure with high-grade silver over a strike length of at least 500 metres on the northern edge of the zinc-rich massive sulphide bodies at South Ayawilca.
• Previous downhole intercepts of the Silver Zone include 7.1 metres at 604 g/t silver and 11.5 metres at 781 g/t silver.
• The Silver Zone mineralization remains open in all directions including up- and down-plunge.

True thicknesses of the above drill intercepts are estimated to be approximately 70% of the downhole thicknesses.

Dr. Graham Carman, Tinka's President and CEO, stated: "We are pleased to report results from the final holes of the 11,000-metre drill program at Ayawilca. These latest drill holes targeted both Zinc Zone massive sulphide mineralization and extensions of the structurally controlled epithermal Silver Zone mineralization on the edge of the massive zinc sulphides at South Ayawilca. All drill intersections have now been incorporated into a new geological model which will form the basis of an updated Mineral Resource estimation which we expect to be released in September 2023."

"Exploration is continuing at the Silvia NW copper-gold target 30 km from Ayawilca. A 121 line-kilometre drone magnetic survey has just been completed, covering outcrops of Cu-Au skarn mineralization which are exposed in several locations over a 3km strike length. Sampling by Tinka has identified high-grade copper-gold skarn in trench samples grading up to 2.7% copper and 22 g/t gold over 2 metres with the best continuous sample being 46 metres at 0.8% copper and 1.9 g/t gold - See previous news release. Processing and interpretation of the data are underway. An environmental permit has been filed with the Peruvian authorities which will allow future drilling once granted."

Zinc Zone Drill Results 2022-23

The Company completed 33 diamond drill holes for 11,115 metres in the 2022-23 drill campaign. These were both infill and step-out holes and were focused at West and South Ayawilca which are known areas of high-grade zinc mineralization. Figure 1 shows a drill map with 2022-23 drill holes highlighted. Some of the best Zinc Zone intersections ever made at Ayawilca were reported during this campaign, including:

South Ayawilca:

• Hole A22-202: 38.9 metres at 20.0% Zn, 0.1% Pb and 31 g/t Ag from 170.5 metres - news release Jan 9 ‘23.
• Hole A22-199: 42.4 metres at 9.4% Zn, 0.1% Pb and 19 g/t Ag from 246.5 metres - news release Jan 9 ‘23.
• Hole A22-212: 145.2 metres at 10.9% Zn, 0.2% Pb and 31 g/t Ag from 158.2 metres - news release Mar 6 ‘23.
• Hole A22-208: 71.2 metres at 8.8% Zn, 0.5% Pb and 33 g/t Ag from 168.8 metres - news release Mar 6 '23.
• Hole A22-206: 37.8 metres at 10.5% Zn, 0.1% Pb and 17 g/t Ag from 153.6 metres - news release Mar 6 ‘23.

West Ayawilca:

• Hole A22-200: 44.9 metres at 12.0% Zn, 0.1% Pb and 16 g/t Ag from 283.6 metres - news release Nov 21 '22.
• Hole A22-207: 132.5 metres at 6.8% Zn, 0.3% Pb and 21 g/t Ag from 193.9 metres - news release Jan 24 '23.
• Hole A22-205: 134.0 metres at 4.8% Zn, 0.1% Pb and 10 g/t Ag from 180.0 metres - news release Jan 24 ‘23.
• Hole A22-203: 49.8 metres at 8.3% Zn, 0.1% Pb and 16 g/t Ag from 186.88 metres - news release Jan 24 ‘23.
• Hole A23-216: 97.9 metres at 8.8% Zn, 0.1% Pb and 16 g/t Ag from 197.9 metres - news release June 8 '23.

The full suite of drill results from the 2022-23 program have now been incorporated into an updated 3D geological model and a Mineral Resource update is in progress. The updated Mineral Resource estimation is expected to be available in September 2023.

Significant improvements to the geological interpretation based on the 2022-23 drill program include the following:

1. Zinc Zone mineralization at West Ayawilca is more vertically controlled than was previously interpreted - two zinc sulphide ‘pipes' each with diameters of between 100 and 150 metres extend through entire limestone sequence (up to 200 metres vertically).
2. High-grade, continuous massive zinc sulphide mineralization at South Ayawilca is concentrated within a tightly folded anticline ‘hinge' - this very high-grade zone has the potential to be a ‘starter mine' to provide quick payback of initial capital.
3. An initial hydrological study has also been conducted to better understand the underground water conditions at Ayawilca. Hydrological information has been obtained from 11 down-hole piezometers which were installed on a wide drill spacing to get adequate coverage across the project. The hydrological study, which is close to final completion, will be important for mine plan studies in the future.

Silver Zone Drill Results

The Silver Zone is hosted by a steep-dipping structure ("060 Fault") located on the northern edge of the Zinc Zone massive sulphides at South Ayawilca. Previously, the Silver Zone had been identified along a 250 metres strike length. However, resampling of an earlier hole in the drill campaign, A22-195, has led to an updated interpretation that the Silver Zone extends for at least 500 metres along the northeast-trending structure and remains open. A map showing drill holes of the Silver Zone is shown in Figure 2. A longitudinal section of the Silver Zone is presented in Figure 3.

Hole A23-223, a follow-up to the high-grade silver mineralization in A17-072, intersected low-grade silver mineralization only and is interpreted to have intersected the Silver Zone structure at a depth which is too deep to be well mineralized. The hole did, however, intersect strong Zinc Zone mineralization higher up in the hole.

To date, eight drill holes have intersected the Silver Zone structure across a strike length of ~500 metres. The mineralization is interpreted to plunge at a shallow angle to the southwest (see Figure 2). Highlights of the Silver Zone downhole intersections include:

• Hole A23-220: 29.5 m at 182 g/t Ag from 289.7 m including 7.1 m at 604 g/t Ag - news release May 2 '23.
• Hole A17-095: 8.7 m at 135 g/t Ag from 307.3 m - news release May 2 '23.
• Hole 17-072: 11.5 m at 781 g/t Ag from 294.5 m including 2.0 m at 3167 g/t Ag - news release July 17 ‘17.
• Hole A19-167: 29.6 m at 152 g/t Ag from 412.7 m including 7.3 m at 366 g/t Ag - news release Oct 8, ‘19.
• Hole A22-195: 3.4 m at 465 g/t silver from 209.7 m (this release).

Silvia Project Exploration

A drone magnetic survey was successfully completed at the Silvia NW copper-gold target, 30 km west of Ayawilca - see location map in Figure 4. In total 121 line-kilometres of drone magnetic data was acquired covering an area of approximately 13 km². The geophysical data is currently being processed and interpreted.

At the Silvia NW target, high-grade copper-gold mineralization occurs in outcrops of ‘green garnet skarn' associated with chalcopyrite, secondary copper minerals (with very low arsenic) and microscopic native gold, adjacent to altered felsic intrusions. "Area A" sampled up to 2.7% copper and 22 g/t gold over 2 metres in trench samples, with the best trench sample being 46 metres at 0.8% copper and 1.9 g/t gold - news release Nov 10 ‘21. The Silvia NW target has not been drilled in the past. Tinka has filed for an environmental drilling permit ("DIA") to the Peruvian authorities and is awaiting approval.

Table 1. Summary of new drill hole results in this release

Note on sampling and assaying

Drill holes are diamond HQ size core holes with recoveries generally above 80% and often close to 100%. The drill core is marked up, logged, and photographed on site. The cores are cut in half at the Company's core storage facility, with half-cores stored as a future reference. Half-core was bagged on average over 1 to 2 metre composite intervals and sent to SGS laboratory in Lima for assay in batches. Standards and blanks were inserted by Tinka into each batch prior to departure from the core storage facilities. At the laboratory samples are dried, crushed to 100% passing 2mm, then 500 grams pulverized for multi-element analysis by ICPMS using multi-acid digestion. Samples assaying over 1% zinc, lead, or copper and over 100 g/t silver were re-assayed using precise ore-grade AAS techniques. Samples within massive sulphide zones were also assayed for tin using fusion and AAS finish.

Figure 1. Drill hole map of 2022-2023 holes at Ayawilca highlighting the large zinc sulphide bodies

Figure 2. Map of selected Silver Zone drill holes - new drill hole intersections are highlighted in red

Figure 3. Longitudinal section of the Silver Zone (Viewing NW) with downhole drill intersections

Figure 4. Regional map of Ayawilca and Silvia projects with selected mines and mining claims in Central Peru

Table 2. Drill hole details for 2022-2023 drill program including drill collar coordinate information