Australia's richest person, Gina Rinehart, will fight elements of a complex court ruling that found two rival mining dynasties were entitled to a share of the spoils from some of the billionaire's prized iron ore assets.The Western Australian Supreme Court last month ruled the wealthy heirs of mining pioneer Peter Wright and engineer Don Rhodes were entitled to some of their claims for royalties from the massive Rio Tinto-operated Hope Downs mining complex, in WA's ore-rich Pilbara region.Hancock Prospecting, of