BEIJING, April 8 -- A large cache of stone tools estimated to be up to 35,000 years old has been discovered on the site of one of Australia's largest iron ore mines, sparking calls on Monday for the site's preservation.

    Archaeologists uncovered the tools on the site of the 920 million U.S. dollars Hope Downs iron ore mine, about 310 km south of Port Hedland, in western Australia's ore-rich Pilbara region.

    "We have always known this is an important part of our history, that our ancestors lived here," Slim Parker, a senior elder of the local Martidja Banyjima people, told Australia's Fairfax newspapers.

    "Our stories and songs tell us this. It is a good feeling to know archaeologists have proved what we say is true. It makes us feel strong. Now we want this place preserved. It is part of our heritage and our culture," Parker said.

    Archaeologist Neale Draper said the Hope Downs site could prove to be one of Australia's most significant historical finds, and could yield more material up to 40,000 years old.

    The stone tools, mostly makeshift blades and cutting implements, were found in a rock overhang. Carbon dating tests indicated some were much older than charcoal remnants from ancient campfires.

    "The oldest-dated stone artifacts are a core, and associated flakes that have a radiocarbon age estimate of 35,000 years," US archaeologist W. Boone Law said, referring to an implement resembling a stone spike.

    He said the site was of international historical significance.

    The Hope Downs mine is expected to have a yearly capacity of 30 million tons when a two-stage project is completed.

    Discussions are underway between the mine companies and the indigenous owners of the land, who wanted sensitive areas where Aborigines had lived for more than 1,000 generations protected from mining.

    (Source: China Daily/Agencies)