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 The Tiger Uranium project consists of nine cateos (claims) covering approximately 45,000 hectares (174 square miles) surrounding the 1000 hectare (4 square mile) Sierra Pintada open pit uranium mine owned by Comision Nacional de Energia Atomica "CNEA". Historically the Sierra Pintada Mine produced 2300 tonnes (5 million lbs) of U3O8 from1974 through 1986 and has remaining resources of 9200 tonnes (20 million lbs) U3O8. The ore grade of the mine is 0.12 % U3O8 (CNEA Report January 2006). The mine consists of several deposits localized within a shallowly dipping fold structure within a favorable sandstone unit 5 to 20 meters thick of the Los Reyunos Formation. The Tiger Uranium project covers the extensions of this favorable sandstone formation to the south, east and west.
 Portal Resources has outlined six target areas based on mapping over a strike length of 20 kilometers. The highest priority target lies near the southern boundary of CNEA's Sierra Pintada claims where close spaced drill holes on approximately 50 meter centers are present within favorable red hemitized magnetite bearing sandstones which, historically, have the best mineralization in the deposits.
Phase I exploration, budgeted at US$400,000, has begun with mapping, sampling, surface radiometric spectrometer surveys and  initiating permitting for up to 150 wide spaced drill holes. Phase II exploration will consist of approximately 20,000 - 25,000 meters of percussion or reverse circulation drilling to test the most favorable target areas.
Portal's 100 square miles surrounds CNEA-owned Sierra Pintada, 4 square miles which has 5 million lbs. past production of uranium and a remaining 20 million lb. resource.
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