** Shares of Perpetual Resources Ltd PEC.AX rise as much
as 113.3% to A$0.032, their biggest intraday pct gain
** Stock of the silica sands explorer trades 73.3% higher at
A$0.026, highest level since Feb 20
** Co enters binding option agreement to buy lithium
exploration tenement package in Minas Gerais, Brazil
** Has exclusive option to buy four lithium exploration
permits held by RTB Geologia E Mineração (RTB)
** More than 108 mln shares change hands, vs the 30-day
average of 478,114 shares
** PEC stock down 16.7% this year, as of last close
(Reporting by Sameer Manekar in Bengaluru)
((Sameer.Manekar@thomsonreuters.com; Twitter: https://twitter.com/sameer_manekar))