Vancouver, Canada – Tinka Resources Limited (“Tinka” or the “Company”) (TSXV & BVL: TK) (OTCQB: TKRFF) is pleased to announce tin assays from the 7,600 metre, 21-hole, 2020-2021 drill program recently completed at the Ayawilca project in central Peru.
While the focus of the 2020-2021 drill program was on resource definition of zinc-silver mineralization, significant tin mineralization was also intercepted in several of the drill holes. Of note, Tinka has discovered a new zone of high-grade tin mineralization at South Ayawilca, immediately adjacent to the highest grade zinc resource. This is the first time that tin mineralization of such high grade has been discovered at South Ayawilca. Tin mineralization was intersected in eight adjacent drill holes, including seven of the recent holes, in zones that typically contain very minor or no zinc mineralization. The tin mineralization is believed to be hosted by multiple, flat-dipping lenses with each lens up to 12 metres in thickness and with horizontal dimensions of approximately 200 metres, remaining open to the north. Tin mineralization in hole A21-187 (12 metres grading 3.1% tin) occurs 40 metres above zinc mineralization in the same hole (4.1 metres grading 17.7% zinc) (link to news release). Tin occurs as cassiterite (SnO2), the most common ore-forming mineral of tin. Refer to maps in Figures 1 and 2 for the location of the tin mineralization.
Tin is traditionally used as a solder and for tin plating of other metals but it also is a key metal in new applications such as autonomous and electric vehicles, renewable energy, energy storage, and advanced computing. Tin has the highest value of the major base metals and is currently trading at around US$27,000 per tonne or 3 times the value of copper and 9 times the value of zinc (source).
Tin results – South Area:
- 12.0 metres @ 3.05% tin from 262.0 metres depth, including
- 2.0 metres @ 5.43% tinfrom 266.0 metres depth.
- 2.0 metres @ 1.25% tin from 332.0 metres depth; and
- 7.0 metres @ 0.78% tin from 373.0 metres depth;
- 4.5 metres @ 0.54% tin from 286.4 metres depth;
- 2.2 metres @ 0.63% tin from 317.0 metres depth;
- 4.0 metres @ 0.66% tin from 300.0 metres depth;
- 4.0 metres @ 1.03% tin from 348.0 metres depth;
- 3.9 metres @ 0.96% tin from 253.1 metres depth;
- 11.0 metres @ 1.81% tin from 275.0 metres depth.
Zinc results – South Area:
- 16.6 metres @ 5.0% zinc & 12 g/t silver from 281.8 metres depth.
True thicknesses of the tin and zinc intersections above are estimated to be at least 90% of the downhole thicknesses. Tin intervals are calculated at a 0.5% Sn cut-off. *Result was partially announced in an earlier drill program.
President and CEO of Tinka, Dr. Graham Carman, stated: “While Ayawilca is best known for its large and high-grade Zinc Zone resource, the property also hosts a Tin Zone resource which is mostly located at deeper levels along a northeastern trend away from the highest grade zinc deposit at South Ayawilca. The new discovery of tin at South Ayawilca is potentially very important as a complement to the zinc deposit, as it is the first time we have encountered such high grades of tin immediately adjacent to one of the best zones of zinc at the property, an area which would likely be prioritized in the early years of a future mining operation. This new style of tin mineralization appears to be different to that observed previously in the deeper part of the Tin Zone at Central Ayawilca – the new style contains what appears to be ‘clots’ of coarse-grained cassiterite mineral grains (see photographs of the tin mineralization in Figure 3). The Company is immediately prioritizing mineralogical test work of this exciting new discovery, including gravitational separation of the cassiterite which has a very high density compared with most other minerals including sulphides.”
“All significant intersections of zinc-silver and tin in the 2020-2021 program have now been reported. Two holes followed up on a high-grade shallow zinc-silver intersection at 100 metres depth in A20-177 (holes A21-188 and 189) hosted by sandstone overlying the main carbonate host rock. Only narrow mineralized structures were encountered. Tinka geologists interpret that the high-grade zinc-silver veins hosted in the sandstone have variable thicknesses and may have different orientations which require tighter drill spacing to be adequately tested.”
“Now that the drill results are fully reported, the Company is advancing Ayawilca towards a resource update and an updated Preliminary Economic Assessment by early Q3 2021.”
Tin Mineralization in Drill hole A21-187
Tin mineralization in hole A21-187 is 12 metres in downhole thickness (which approximates true width) and hosted by massive sulphides consisting of pyrrhotite (magnetic iron sulphide) and lesser pyrite with minor quartz, carbonates and other silicates. Tin minerals occur as clots and disseminations of cassiterite (SnO2) within the pyrrhotite matrix and are commonly associated with carbonate infillings. See photos of the tin mineralized drill core in Figure 3.