High-Grade Intercepts From The Alacran Deposit In Colombia
TORONTO, ON - Cordoba Minerals Corp. reported additional high-grade intercepts from the ongoing resource expansion diamond drilling at the Alacran Deposit, located within the 100%-owned San Matias copper-gold project in Colombia.
An additional fifteen drill holes (ACD067 to ACD081) have been completed at the Alacran Deposit that focused on improving the continuity of mineralization and testing resource expansion potential in areas located to the north, west and south of the currently defined resource. Assay results from three drill holes are pending (ACD078, 079, and 081) and are expected to be included in the updated resource estimate to be completed in the first quarter of 2018.
Results from new step-out drill holes have demonstrated continuity of the stratabound copper and gold manto-style mineralization 100 metres down-dip and 50 metres to the northwest of the currently defined resource boundary of the Alacran Deposit. Hole ACD070 reported a significant manto intercept of 57.5 metres @ 0.65% copper and 0.43 g/t gold, including a new style of high-grade epithermal vein mineralization comprising a 1.3-metre-thick vein containing 11.30 g/t gold and 1.13% cobalt. The stratabound and the vein-style mineralization are open down-dip and on-strike to the northwest as highlighted on the long section.
Diamond drilling has continued to define the southern extension of Alacran, previously identified by hole ACD066, which was collared 200 metres to the south of the Inferred Mineral Resource. Hole ACD069 was collared 65 metres southwest of ACD066 and intersected 25.4 metres @ 0.71% copper and 0.14 g/t gold.
Mario Stifano, President and CEO of Cordoba Minerals, said "We are very pleased with the results we continue to receive from exploration drilling at Alacran. The recent results represent significant potential to extend and increase the scale of the current Alacran mineralized resource, particularly to the northwest with mineralization now extending over 1.4 kilometres in strike and up to 500 metres in lateral width. We continue to be excited and surprised by the prospectiveness of Alacran and the potential of the San Matias district with the discovery of new epithermal veins with high grade gold and cobalt that warrant continued drilling and exploration. We will continue to drill and define these highly prospective areas, and look forward to providing an updated resource estimate in Q1 2018."
Gold-rich zones at the Alacran Deposit are not only associated with copper in the replacive stratabound mineralization but also with two different styles of epithermal vein mineralization: (1) intermediate sulphidation or CBM ("carbonate base-metal") style veining that has a sphalerite-gold association and (2) low sulphidation fault-veins where gold is associated with arsenopyrite with cobalt. Both vein types are associated with strong carbonate-chlorite-white mica alteration and are interpreted to have occurred as part of a later geological event overprinting the stratabound manto-style copper-gold mineralization.