** Shares of Highfield Resources HFR.AX fall 46.9% to A$0.130, set for their worst session, if losses hold
** Earlier in the session, the mineral explorer hit its lowest level since June 11
** Co says a unit of state-owned China Minmetals, Qinghai Salt Lake Industry 000792.SZ, dropped plans to invest $300 million to take control of Highfield
** More than 930,000 shares change hands in their busiest day since June 17
** Stock down ~55% this year, including the day's move
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))