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Andrea
The Andrea Project is located in the Andes of Region IV of Chile and lies within the late Eocene-- early Oligocene Copper Belt. This is one of the most important copper belts in the world and includes such giant porphyry copper deposits as Chuquicamata and Escondida. The project area lies approximately 75 kilometres east of the city of Illapel in central Chile.
The Andrea Project consists of 100% owned exploration licenses covering 1,300 hectares. Mineralization is associated with Eocene (?) porphyritic intrusives of intermediate composition that cut Late Cretaceous volcanic and sedimentary rocks which form the regional basement. The Eocene intrusives crop-out in a 2.5 by 4.5 kilometre area and are generally located along north-trending regional faults that also control the location of hydrothermal alteration and mineralization. The alteration zone associated with the intrusives extends over an area of 3 by 2 kilometres and grades outward from a 600m long central core of potassic alteration along Banzai Ridge, with disseminated secondary biotite and stockwork pyrite, magnetite and chalcopyrite, to a large area of sericitic alteration with abundant iron oxides (goethite > jarosite > hematite).
Exploration work to date consists of 149 talus fines and 80 rock samples, and 1:10,000-scale outcrop mapping. In detail, 31 talus samples that cover a 1.1 by 0.75 kilometre area along Banzai ridge average 1770 ppm copper and 45 ppm molybdenum (and 36 ppb gold); rock samples from this area average 1746 ppm copper and 31 ppm molybdenum and assayed up to a maximum of 6016 ppm copper and 253 ppm molybdenum with a nucleus of 600 meters by 200 meters that averaged 2,400 ppm copper. Talus fines results over the phyllic zone average 185 ppm copper and rock samples reach maximum of 100 ppm copper and 88 ppm molybdenum. These results are considered to be very encouraging for this early stage of exploration.
The results of geochemical sampling and alteration mapping to date indicate that a significant copper-molybdenum porphyry system has been identified at Andrea. The best results to date correspond to the zone of potassic alteration, however, the phyllic-altered zone is also a highly prospective area where significant copper and molybdenum mineralization could be present at depth.
Maps and Photos
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