Lincoln Mining Corporation, (TSX-V: LMG) a Canadian company exploring and developing prime gold and silver projects, has reported on progress at its La Bufa property in southwestern Chihuahua, Mexico.
La Bufa is an early to mid stage gold-silver exploration project located in a historical mining district within the Sierra Madre mineral belt in southwestern Chihuahua State. Lincoln controls a large land position that covers most of an 11 km long mineral trend.
Over the last 10 months the Company has been actively exploring its 2,311 hectare gold and silver property adjacent to the town of Guadalupe y Calvo. The purpose of the exploration has been to define drill targets and to build a resource base. Historic records indicate that the area produced over 2 million ounces of gold and over 28 million ounces of silver. The average grade from past production was just over 37 grams per tonne gold and 870 grams per tonne silver. Mining was carried out to depths of 100 to 200 meters. Past production came mainly from quartz breccia veins on the Guadalupe y Calvo concession presently owned by Gammon Gold Inc.. Lincoln's property encircles Gammon's Guadalupe y Calvo concession. The main mineralized structural zone, which was the source of historical production, trends in a northwesterly direction and carries onto Lincoln Mining's ground. Almost all of the mineralization in the district is hosted in Lower Volcanics.
As previously disclosed, Lincoln Mining conducted a large geophysical survey totaling 20,000 line-meters during December 2009, January and February 2010. This work was carried out on the northern part of the La Bufa Concession. The geophysical program consisted of both resistivity and chargeability surveys which were followed up by rock-chip sampling. Sampling focused on three target areas which were highlighted by the geophysical survey. Geological mapping was also conducted. Two hundred and thirty-four (234) samples were collected from available outcrops. Surface assays produced results up to 20+ grams per tonne gold and over 900 grams per tonne silver.
Three large target areas were identified by coincident geophysical and geochemical anomalies. Target Areas 1 and 2 are long brecciated quartz structures which may extend to considerable depth as suggested by their geophysical signatures. Target Area 1 extends for over 1,000 meters as intermittently exposed zones that exhibit locally high silver and gold values. Target Area 2 extends for over 650 meters and exhibits elevated silver values with attending anomalous gold. A third target is also present between the two district structural zones. Target 3 is a heavily altered quartz monzonite porphyry with potential for stockwork silver-gold mineralization. Target Area 3 appears to be at least 400 meters across with low silver values and locally anomalous gold.