AGUILAR (Aguilar), El Aguilar is the large lead-zinc ore field in Argentina. It includes the lead-zinc skarn deposits: Aguilar (the most prominent, is developed since 1936), Esperanza, Oriente.
The mineralization is in the conjunction with the exocontact of the stock of the alkaline granites of the Cenozoic age, which is intruding through the thickness of the interbedded calcareous quartzites, marbled limestones, shales, and hornfels of the Cambrian. The ore bearing zone with the thickness of 400 metres extends for 1000 metres along the large tectonic fault. They mark down the seven ore bearing horizons. The ore bodies of the tabular form (thickness up to 25 metres, length up to 150 metres) are complicated by the series of the tearing faults and are traced down to the depth of 750 metres (Figure).
The mineralization is extremely uneven. The vein filling is quartz, garnet, calcite, rhodonite, wollastonite, diopside. The ore minerals are sphalerite, galena, pyrite, chalcopyrite, molybdenite, freibergite, arsenopyrite. The texture of the ores is massive, banded, brecciated. The reserves of the ore are 10 million tonnes (1975) with the content of Pb 11.5%, Zn 16.3%, Ag 279 grams per tonne. The development of the ore field is performed by using the mine. The productive capacity of the mining and beneficiation enterprise of the "Compacia Mineral Aguilar S. A." company is 43 thousand tonnes of 77% lead concentrate, 78 thousand tonnes of 50% zinc concentrate, 55 tonnes of silver (1977).
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