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Lece Mine – Medveda, Republic of Serbia

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The ore occurs in a number of epithermal vein-breccia bodies some 2,000m long and 2-50m in width (average of 8-10m). The Šuta-Rasovaca vein-breccia zone trends NNW-SSE (330 degrees) with a dip of 60-70 degrees to the west and has been traced over a distance of over 6,000m, with a typical thickness of 0.3 to 20m.

The Jezerina 1 Vein zone is situated in the north-eastern part of the mine with a general E-W strike and a dip of 82-85 degrees. The vein zone comprises a number of quartz-breccia bodies cut by quartz and sulphide-bearing veins. The ore zone is typically pervasively brecciated showing several generations of fluidized, tectonic and hydraulic fracture breccias accompanying various stages of mineralization.

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Towards the eastern end of the Jezerina 1 system the strike swings to ESE and a number of sub-parallel veins are seen on both the hangingwall and footwall sides of the main structure. These sub-vein systems dip both to the north and south forming a number of significant ore shoots. Significant potential remains on these veins and at their intersections with Jezerina 1.