Tinka expands zinc mineralization at South & West Ayawilca https://finance.yahoo.com/news/tinka-expands-zinc-mineralization-south-124800776.html CNW GroupAugust 15, 2017 36.3 METRES GRADING 5.2 % ZINC INCLUDING 5.5 METRES GRADING 12.5 % ZINC IN HOLE A17-079 MINERALIZATION REMAINS OPEN