** Shares of 29Metals 29M.AX down as much as 22.6% at AS$0.41, their lowest level since October 1
** The copper-focused miner's quarterly zinc productionat its Golden Grove mine drops to 2.0 kt from 19.1 kt from prior year
** However, co's quarterly copper production at the Golden Grove mine was 5.8 kt, up from 4.4 kt in prior year
** 11.6 million shares change hands, 2.2x the 30-day average volume
** Stock currently down 21.7%, trimming YTD gains to 69.4%
(Reporting by Sherin Sunny in Bengaluru)
((Sherin.Sunny@thomsonreuters.com))