IRONORE Sector majors BHP BHP.AX and Rio Tinto RIO.AX rose 0.5% and 0.6%, respectively. Dec 19 (Reuters) - Australian shares edged lower in a choppy session on Monday, as hawkish tones from major central banks continued to mount fears of the global economy slipping into recession. Moves were in tandem with a global sell-off after central banks in the United States, euro zone, Britain and Switzerland last week slowed the pace of their aggressive interest rate hikes, however, signalled that the battle to tame inflation is far from over.