The two concessions are located 110 kilometers northwest of Caborca, just west of Highway #2. The concessions total 2,879 acres. The properties are located eight kilometers west of the Highway #2, 40 kilometers south of Sonoita, which is on the border with Arizona. Gravel and dirt roads provide access to the property from the
highway.
Geology
The concessions are underlain by Pre-Cambrian granites intruded by andesite dykes of presumably similar age. Most of the lower relief areas are underlain by later Mesozoic biotite granodiorites. The eastern/northeastern portion of the concession is cut by a large Tertiary fault that produced a down dropped basin filled with ryholitic volcanics and tertiary gravels. The small Mel concession is centered on a low angle north-northwest dipping quartz vein that has numerous workings along its length. There is no data about the grades encountered in these workings.
The larger Manuel concession also covers several areas of old workings, the most extensive being a set of workings with extensive dumps of black andesitic volcanics referred to on Consejo maps as the "La Negrita Mine". There are a number of shafts, cuts and tunnels in this area but no records of past production which apparently centered on a 1-3 metres quartz vein.
Another area of extensive works is located in the south western part of the concession where the dumps suggest quartz veins were the main target for production. The valley floor here shows development of regolith (derived from the immediately underlying rock) placer which shows evidence of past dry placer mining in the form of numerous old pits and trenches. Samples from a one metre quartz vein in this area returned 3.5 g/t and 3.4 g/t gold.
Pediment compiled data and analyses to generate relevant estimates of grades encountered by past workers in the area, and use this to target areas on the concession for follow up work. Maps
Geology & Sample Locations |