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El Brujo, La Bruja and Tedeche Concessions
Drilling in 1996 by BHP Minerals International (now BHP Billiton) at La Bruja (2,222 meters in 10 holes) cut intense argillic (sericite-illite-smectite) to advanced argillic (sericite-pyrophyllite) alteration and high sulphidation mineral assemblages (enargite-pyrite), hosted within quartz plagioclase porphyry, hydrothermal breccia, pyroclastics and schists. Intervals up to 0.97 grams of gold per tonne over 50 meters were cut in core. Mineralization and alteration at La Bruja is focused along northeast and northwest trending major faults. El Brujo is located some 3 kilometers northwest of La Bruja, along strike from the prominent northwest trending Domenica Fault Zone.
A program of surface mapping and sampling at El Brujo revealed widespread gossan and ferricrete float within the area of a 600 by 850 metre soil geochemical anomaly (the "Gossan Zone") as well as 350 by 400 metre soil anomaly some 1.5 km to the southeast (the "Vein Zone"). Mapping and rock sampling established the presence of mineralized outcrop and float in several areas, with values of 3.7 g/t gold, 63 g/t silver, and 2.8 g/t gold and 130 g/t silver in the Gossan Zone and 2.5 g/t Gold in the Vein Zone. Prospecting along the mineralized stratigraphy to the northwest from the grid area resulted in the discovery of anomalous gold in float boulders (up to 3 g/t gold and 3.2 g/t silver) three kilometers northwest of the Gossan Zone. In all areas where mineralization has been discovered, rock exposures are poor, therefore prospecting and float sampling has been the best exploration tool.
In February of 2003, an initial 800m core drilling program confirmed the existence of porphyry copper-gold mineralization. The aim of the drilling was to define the extent and grade of the mineralization in three target areas within the concession. Two holes tested the Dos Brazos Zone where 1999 soil sampling returned values of 3.7 g/t Au, 63 g/t and 2.8 g/t Au and 130 g/t Ag. The holes intersected 24 metres of 0.19 g/t Au and 0.52% Cu. Recent float sampling in the Las Cayas Zone has returned values up to 44.4 g/t Au and 509 g/t Ag but the zone was not drilled.
In early 2008 IMPACT carried out an Induced Polarisation geophysics survey which identified additional anomalies on the concessions.
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