The Mat-I Project is approximately ten kilometers south of Surigao City. The prospect was originally filed as an MPSA application which was later converted into an EP Application and covers an area of 885 hectares. To date, Mindoro has earned a 10 percent interest in the Mat-I project and has the option to earn up to 75 percent interest through phased exploration expenditures and issues of shares.

Geology of Mat-I consists of ultramafics, sediments and volcanic tuffs intruded by intermediate porphyry intrusives. The Mat-I area was an important artisanal gold mining area and thousands of miners won gold from alluvials as well as shallow, hard-rock workings, where there are spectacular examples of high-grade epithermal veins. However, most of the highest potential ground was lost in land disputes to other parties and due to the declaration of a watershed reserve etsblished to dissuade local artisanal miners working in the area.

Systematic geochemical surveys by Mindoro defined four moderate-order copper in soil anomalies of greater than 100 ppm and up to 268 ppm. Maximum dimension is approximately 2,000 m by 200 m to 300 m. Minor associated gold anomalies are present, as well as strong arsenic anomalies of up to 1,520 ppm. The copper anomalies may reflect intrusive-related mineralization of potential interest. Further geological investigations are planned.