** Mineral explorer's shares CST.AX rise as much 5.3% to
A$0.20, on track for best day since Nov. 29
** Company says assays from its first drill at Explorer 108
project in Northern Territory, Australia discovered high-grade
zinc and lead urn:newsml:reuters.com:*:nASX7c70zz
** Results reinforce company's belief Explorer 108 area
should be centerpiece of its 2022 drilling campaign - Mark
Hepburn, managing director of Castile
** Stock down 32.1% this year, as of last close
(Reporting by Jaskiran Singh in Bengaluru)
((Jaskiran.Singh@thomsonreuters.com;))