Tinka Drills 10.4 Metres Grading 44.0% Zinc in New Discovery of Exceptional Zinc Grade at Ayawilca https://www.tinkaresources.com/news/tinka-drills-10-4-metres-grading-44-0-zinc-in-new-discovery-of-exceptional-zinc-grade-at-ayawilca June 26th, 2018