BUZZ-Iron ore miners: Australian supply to China at record high
** Australian iron ore producers' shipments to China amounted to record 62.9 pct of nation's August import volume
** Rio Tinto Plc shares up 1.3 pct at $50.80; BHP Billiton Ltd up 0.70 pct at $61.70 premarket
** China imported 47.1 million tonnes of iron ore from Australia, up 35 pct on the year to reach second-highest level on record
** A supply glut and price collapse have made many second-tier supplier countries leave Chinese market, except for large Australian producers and Brazil's Vale SA
** Chinese traders blame Australian miners Rio Tinto
and BHP Billiton for supply glut
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