** Matsa Resources MAT.AX soars as much as 20.59% to A$0.145, highest since October 16, 2020
** Gold explorer identifies high-grade gold at Devon Pit mine in Western Australia
** Stock adds ~44% in value so far this week; set for best week since early August, 2012
** About 4.6 mln shares traded vs 30-day avg of ~1.5 mln
** Stock tracks broader rally in mining sub-index .AXMM, which is up 1.4%
** MAT last up 12.5%, surges 285.71% YTD
(Reporting by Komal Pooja Asokan)
((KomalPooja.Asokan@thomsonreuters.com))