Rio Plata Exploration Corp. reported the assay results of the company's exploration activities on its optioned Metates Property located 110 km Net of Mazatlan, in the municipality of Mazatlan and the State of Sinaloa, Mexico. These assays represent the continuation of exploration activities in and around the former Metates mine.

As surface and underground mapping was completed, the structural model of the Metates Corridor and region was developed. The suggestion of multivein mineralized systems was considered early on and reported as a theory to be proven by drilling. However, later surface mapping identified several subparallel and crossing vein traces along most of the two kilometer long main vein exposure.

Underground scaling and sampling efforts also exposed additional subparallel vein systems in all levels of the mine. The opening of level 1 for exploration efforts and the removal of collapsed zones within levels 2, 3, 4 and 5 showed that the emplacement of metals within the assorted zones was very complex. Reprecipitation and concentration zones within main auriferous breccia zones were found within structural controls.

While platinum assay values were not returned from selected samples during the assay submission process, subsequent scanning electronic microscopic examinations located platinum in some samples. The assay results returned from the Metates mine works exploration and mapping program are understandably variable and complex. The gold in the system is considered at this time to be mostly in fine free gold form but, scanning electronic microscopic analysis of a general cross section of samples has identified gold (and silver) in both free and poly metallic formats.

The depositional and concentration mechanisms of the gold component are not fully understood.