introduction to tri origin minerals ltd, page-47

re: world resources: identified zinc resources of World Resources: "Identified zinc resources of the world are about 1.9 billion tons".

http://minerals.usgs.gov/minerals/pubs/commodity/zinc/720302.pdf

Comment: Those resources may not all be economic, IMHO. It also takes years to develop these.

Because of heavy use by China and India, most articles are out of date!

I believe that current use is about 12 mill tonnes/year:
http://www.roskill.com/reports/zinc