Indicated resources now total 25 million tonnes grading 5.1% zinc, 134 grams per tonne silver and 2.8% zinc, within total resources of 82Mt at 4.8% lead, 119gpt silver, 2.4% zinc and 0.2% copper.
Myanmar said major geophysical and drilling programs were being planned to continue to upgrade and extend resources, with areas of copper-cobalt-nickel mineralisation to also be targeted.
Scoping work looked at a 2.5 million tonne per annum open cut/underground mining scenario.
Myanmar is backed by the Chinese firm Perilya and rich Australian prospector Mark Creasy, with backing of up to US$150 million from the former for project construction a possibility.
The company completed a A$35 million raising last month that priced new shares at 6c each.