Tinka extends high grade zinc mineralization at South Ayawilca DRILLS 13 METRES AT 19 % ZINC & 19 METRES AT 10 % ZINC IN HOLE A17-061 http://www.newswire.ca/news-releases/tinka-extends-high-grade-zinc-mineralization-at-south-ayawilca-621130993.html VANCOUVER, May 3, 2017 /CNW/ -