SAN GREGORIO OPERATION

SAN GREGORIO NEAR MINE GEOLOGY

print page

The Isla Cristalina Belt is located 450 kilometres from Montevideo in Northern Uruguay and hosts UME's operating gold mine at San Gregorio, in the Minas de Corrales goldfield.

The Isla Cristalina Belt is an erosional window of Proterozoic granites and greenstones, approximately 110 by 40 kilometres. The metamorphic grade of the greenstones ranges from greenschist through to amphibolite facies. The existing deposits are spatially associated with the San Gregorio Shear Zone. The principal alteration assemblage associated with the mineralization comprises chlorite-(epidote)-carbonate-sericite-silica-pyrite.

The Isla Cristalina Belt contains a number of major structures that are prospective for gold. The Company has developed two mining districts in San Gregorio and Zapucay, 20 kilometres southeast of the mine, where known economic gold mineralisation exists.

The San Gregorio operation in the northwest end of the belt is dominated by production from the Arenal deposit. Arenal and two historic deposits, San Gregorio and Santa Teresa, host the largest concentration of gold that has been found to date in the district and are located along the same west north-west trending structural system. Several smaller deposits occur between the larger deposits and the most important currently are the shear hosted, "Veta A" and "Veta Sur" deposits.

The focus of current San Gregorio near mine exploration programs is the expansion of existing resources at San Gregorio, Arenal, Santa Teresa, Veta A, Veta Sur. More information can be found in the following link Exploration.