March 26 (Reuters) - Ivanhoe Mines Ltd
* Releases positive independent preliminary economic assessment of its platreef
platinum-group elements, nickel, copper and gold project in South Africa
* Says 3 run-of-mine production scenarios were examined - 4 million tonnes per
year (mtpa) in pea of platreef project
* Estimated pre-production capital requirement of about US$1.7 billion,
including US$381 million in contingencies for platreef project
* Says preliminary economic assessment includes development of mechanized,
underground mine through a phased approach at platreef project
* Source text for Eikon
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