Mining giants BHP Group BHP.AX and Rio Tinto RIO.AX fell 1.7% and 1.1%, respectively. By Himanshi Akhand Sept 6 (Reuters) - Australian shares reversed course to close lower on Tuesday after the country's central bank raised its cash rate by 50 basis points and signalled more tightening ahead to contain inflation. "The statement made it pretty clear that there are more hikes to come, which is not what equity bulls wanted to hear," said Matt Simpson, a senior market analyst at City Index.