Feb 17 (Reuters) - Rio Tinto (LON:RIO) Ltd RIO.AX :
* ANNOUNCES ADDITIONAL MEASURED, INDICATED AND INFERRED MINERAL RESOURCES AT KENNECOTT COPPER OPERATION
* TOTAL MINERAL RESOURCE INCREASE REPORTED AT AN ECONOMIC MARGIN IS 243 MT AT 0.55% COPPER EQUIVALENT (CUEQ), AN INCREASE OF 577%
* ADDITIONAL MINERAL RESOURCES POTENTIALLY ADD ABOUT FOUR YEARS OF MINE LIFE TO BINGHAM CANYON OPEN PIT