EXPLORATION - URUGUAY

DOM FELLICIANO BELT

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The Dom Feliciano fold and thrust belt forms the eastern margin of the Nico Perez Terrane which is controlled by the Sierra Ballena fault forming roughly the SE third of the exposed Proterozoic granite-greentone rocks of Uruguay .  The belt is the result of a protracted phase of NW-directed contractional deformation associated to the collision of the Cuchilla Dionisio Terrane (to the east) with the Nico Perez and Piedra Alta terrane (to the west) during the Pan African/Brasiliano event (600-650Ma).   This collision produced a wide fault contact or suture called the Dom Feliciano fold and thrust belt that trends NNE, is about 250km by 50 kilometers wide and is host to both the Texas and Presidente Terra gold Exploration projects. 

Texas

The Texas gold prospect is located about 295 km via paved road to the San Gregorio Mine site near the town of Treinta y Tres .  Texas is in the north of the Don Feliciano fold and thrust belt where a recent surface exploration program discovered gold mineralization associated to quartz-pyrite veins over a 1km x 5km area.  The mineralization is hosted in relatively un-deformed pink granites however mapping and sampling identified numerous mineralized veins with grades up to 72g/t Au; out of 463 rock chip samples 140 returned grades greater than 0.5g/t.   Texas is a high priority exploration target for OMI and is permitted and ready for drilling in F2010. 

Presidente Terra

The Presidente Terra Exploration project is located 240km NE from Montevideo or 370 km NW by road to the San Gregorio mine site.  NNE trending mineralized quartz veins and shears flank the regional scale Sierra Ballena strike-slip fault zone.  Gold bearing quartz veins are hosted in granites, quartzites, meta-sediments and along lithologic contacts.  Mineralization is interpreted to be controlled by shears that have focused hydrothermal fluids into receptive lithologies and dilatational traps.  Surface sampling and geological mapping traced mineralization along strike for over 11 kilometers with surface rock chip samples reaching grades up to 300g/t.  Drilling to date has typically intersected erratic narrow zones of 1-2m @ 1-5g/t however a few holes intersected wider zones at similar grades and even a couple of holes intersected 1-3m @ 10g/t or more (see table of results below).  No resource has been defined to date at the Presidente terra project however but OMI considers there to be potential   About half of the strike extent of the mineralized system has been drill tested with over 8,000m of wide spaced diamond and RC drilling and follow-up is planned for F2010.  

Presidente Terra RC Drilling Results 

Presidente Terra Diamond Drilling Results