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Dia Bras Exploration Inc. reported that it has received assay results from the first diamond drill hole of its current drilling program at the Las Coloradas project in the Melchor Ocampo mineral district, Zacatecas State.
The hole intercepted 119.6 m of skarnified limestone and averages 65.6 g/t (2 ounces) silver, 1.16% lead, 1.43% zinc and 0.11% copper. “This is an exciting result for a first drill hole in a property that is approximately 20 km north of the world-class Penasquito mine, which is also a precious metal orebody with base metal by-products,” stated Daniel Tellechea, President & CEO. “Our target at Las Coloradas is a large-tonnage, underground-mineable silver deposit with important zinc-lead-copper by-product credits, and this first hole of our program has confirmed that such mineralization exists over a very wide interval. As we continue the evaluation and exploration of the properties acquired in the EXMIN transaction, our portfolio of attractive properties keeps increasing.” The Las Coloradas project is located in the Melchor Ocampo mineral district, which is known for the occurrence of large carbonate replacement deposits of precious and base metals. Las Coloradas is approximately 20 kilometres due north of Goldcorp´s Peñasquito mine, as well as near important mines/projects in Zacatecas such as Aranzazu (Aura Minerals), Tayahua (Frisco) and Camino Rojo (Goldcorp) (see attached map). The first Las Coloradas drill hole, Drill Hole DLC10B001, was drilled on a bearing of 180° and at an inclination of -45° to twin a hole drilled by Echo Bay Minerals in 1996, hole Z96-35, that was lost in mineralization at 246 m. That hole returned 69.0 metres of core averaging 51 g/t silver, 1.2% lead and 1.1% zinc. The results from Dia Bras’ first drill hole are shown here Drill hole DLC10B001 was collared in sandstone and shale east of a wide (approx. 100 m), near-vertical, E-W trending fault zone and crossed into the Taraises Formation (thin-bedded limestone and mudstone) and then entered the La Caja Formation (siltstone and thick-bedded limestone) that was converted to skarn by intrusion of a granodioritic body (see attached cross section). The lower portion of the Taraises Formation is also skarnified. Underlying the skarnified La Caja Formation is the Zuloaga Formation (massive limestone), which is un-mineralized. The hole was stopped in the Zuloaga Formation at a depth of 357.2 m. Skarn development begins 140 m down hole and continues to 218 m. Disseminated, minor mineralization occurs for the first 25 m, but at 165 m mineralization becomes more intense. The mineralized zone starts in the skarn zone but continues from 218 m as fracture fillings in the jasperoid-bearing La Caja Formation for an additional 66 m. Alteration and mineralization occurs between two narrow (8.0 and 2.7 m width), granodiorite intrusions that are inferred to be dikes. Drill hole DLC10B002 was drilled from the same site and bearing but at an angle of -70° and cut 194 metres of mineralized rock from 210 m down hole. Assays are pending. The hole was stopped at 528 m. The drill rig was moved 400 m to the west and drilled hole DLC10B003 on a bearing of 180° and an inclination of -60° in order to test the strike extent of the mineralization. A fourth hole will also be drilled from this site. More information, click here |
