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Maps & Photos
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  The 3200 hectare Texson property is in a silver enriched portion of the Mojave-Sonora Megashear. Texson is located 40 kilometres southwest of highway electrical main and rail access at Trincheras, and 100 km south of the region's supply base at Caborca. Gravel roads from Trincheras that access the district's placer and hardrock gold operations also traverse the Texson property. The district is one of Mexico's most important historic placer gold producers, but has no recorded history of silver output or exploration. Old workings expose gold-silver bearing quartz veins at the southern end of the target area and silver bearing workings at its north end. There is no history of drill testing within the Texson project, The project contains two significant areas of exposed alteration and mineralization at either end of a five kilometre long flexure in the regional scale shear-thrust zone that hosts them. The portion of the shear-thrust zone between the two mineralized areas is pediment covered and will be targeted for drilling using geochemical and geophysical surveys. The Cerro Colorado gold mine is located 4.5 km on trend to the north-northwest from Pediment property boundary. The northerly Texson Ridge target is an exposure of shattered, Precambrian aged granite and gneiss that has been broadly altered to limonite, jarosite and sericite. The top of the ridge is a silica stockwork zone at the hanging wall of the shallow dipping, regional shear zone that hosts the mineralization. The silica may have acted as a barrier that caused metal laden fluids flooding the shear zone to pond below it. Several old workings that appear to date from the 1800s have been located in the alteration on the northwest face of the ridge. This alteration is exposed across 200 to 400 metres of the shear, and over a 1 kilometre strike length. A similar colour anomaly extends for a further 1 km distance in pediment cover beyond the southern end of the ridge exposure. Limited grab sampling of old dumps and exposed mineralization on Texson Ridge has returned values of up to 255 g/t silver, and averaged (October, 2005) about 80 g/t silver, plus gold. A single sample located 300 metres southeast of Texson Ridge has returned 1,250 g/t silver and 0.65 g/t gold in a narrow vein hosted by limestone. An aerial view of the Texson Ridge colour anomaly is to the left in the photograph below, with the on-trend anomaly to the right. The Calerita-Olivios area at the southern end of the project contains a number of narrow quartz veins that have been exposed in this flat lying area by old open workings and trenches. The pediment cover surrounding this vein area is a red colour anomaly similar to that at Texson Ridge. Limited grab sampling has returned values of up to 11 g/t gold and 145 g/t silver from the veins. Texson is being targeted primarily to test for bulk tonnage, leach extractable silver and/or gold potential. Planned work includes extensive sampling and trenching at Texson Ridge, character sampling at the Calerita-Olivios area, and geophysical and geochemical surveys over the entire five plus kilometres of prospective trend and other areas of interest. There is a limited history of bulk mining using acid leach extraction of deposits that have silver as the primary product. But there is a 30 year history of successful heap and vat leach extraction in gold mining, and many of these deposits also recovery silver. The Rochester silver mine [ in Nevada is one example, and has a production and reserve base of 128 million ounces of silver and 1.2 million ounces of gold. The Alamo Dorado deposit located in southern Sonora State, within a fold-trust belt similar to but separate from the Megashear, was acquired by Pan American Silver by takeover of Corner Bay Minerals in 2003. Pan American Silver has indicated it is proceeding to production of the deposit on a reserve base of 11.6 million tonnes grading 118 g/t silver and 0.33 g/t gold. There are also advanced exploration silver projects in southern Argentina and southern Peru being assessed for development that may include acid leach extraction processes for the silver. |
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