La Frazada is located approximately 300 km northwest of Guadalajara and hosts silver rich epithermal veins with base metals. The 299-hectare exploration concession lies within the western foothills of the Sierra Madre Occidental. Access is good, being only a few kilometers from the main coastal highway with average elevations less than 200m above sea level. La Frazada was mined in the late 1890’s by an English company, with the Mexican revolution effectively stopping all activity by 1910. A small ornate smelter stack is all that remains of that early historical production. Two parallel quartz veins with galena and sphalerite have been traced for over 1800m along strike and host mineralization in three known mineralized shoots. La Frazada has a historical measured and indicated resource totaling 583,000 tonnes at 250 g/t Ag, 0.87% Pb, and 2.44% Zn; historical inferred resources are an additional 534,000 tonnes at 225 g/t Ag, 0.92% Pb, and 2.62% Zn. These resources are near surface and within the existing mine workings. A drilling program targeting deeper levels of the projected mineralized shoots has never been undertaken, but could appreciably add to the resource.
Historical Mineral Estimate
|Total M+ I
* Silvermex Resources Limited reported in a technical report titled “Technical Report and Preliminary Resource Estimate for the La Frazada Silver Property, El Zopilote Mining District, Nayarit, Mexico) dated November 24, 2008 (amended January 19, 2009) (filed on SEDAR on February 18, 2009), prepared by William J. Lewis, the above historical mineral estimate. The historical mineral estimate used “measured mineral resource”, “indicated mineral resource” and “inferred mineral resource”. Although these categories are set forth in NI 43-101 and CIM, CIM has revised its definitions for mineral resources since the completion of the technical report that supports this resource estimate. Accordingly, Plymouth considers these historical estimates reliable as well as relevant as it represents a target for exploration work by Plymouth. The data base for the historical resource estimate consisted of 729 samples; 233 belonging to the La Jabalina West vein, 384 to the La Frazada vein and 112 samples corresponding to the La Jabalina East-Tiro Real vein. The mineral resource estimate used a block model method with a cut-off grade of 80 g/t Ag, 0.75% Pb and 1% Zn. The qualified person has not done sufficient work to classify the historical estimate as a current mineral resource therefore Plymouth is treating these historical estimates as relevant but not current mineral resources.