La Guitarra Silver Mine


La Guitarra is 100% owned and operated by First Majestic Silver Corp. as the project was acquired in 2012 as a result of the acquisition of Silvermex Resources.

The property consists of 39,714 hectares and is located within the Temascaltepec Mining District in Mexico. This district is a historically significant mining area as operations at La Guitarra first began in the early 15th century and continued through to the 19th century.

First Majestic completed an expansion program at La Guitarra in early 2013. The processing plant's capacity increased by 40% to 500 tpd (flotation) from 350 tpd. The expanded 500 tpd flotation mill consists of a new ball mill, new flotation cells, buildings and related infrastructure. In 2014, both the newly developed and high grade Jessica and El Coloso veins began providing mill feed. First Majestic expects that these two areas will supply the plant with 90% of the required ore by mid-2015.

Further planning and permitting is underway for an additional mill upgrade to 1,000 tpd.


The La Guitarra Mine lies in the southeast end of the Mexican silver belt, within the Temascaltepec Mining District in the State of Mexico. The property is located approximately 130 km southwest from Mexico City. The total 100% owned land position covers 397 square kilometers (km) and over 15 km of strike length.

Mining & Milling Operations

The La Guitarra Mine presently consists of two underground operation centers and a flotation mill with a capacity of 500 tpd. Permitting and planning for a new 1,000 tpd cyanidation processing facility is underway. At this increased throughput, production is expected to reach 2 million ounces of silver doré per year.

Operating Highlights

La Guitarra Production Results 2014 2013 2012*
Ore Processed/Tonnes Milled 186,881 171,662 60,499
Average Silver Grade (g/tonne) 127 152 230
Recovery (%) 84% 84% 87%
Total Silver Ounces Produced 636,301 709,002 389,927
Gold Ounces Produced 6,329 6,466 1,737
Total Production - Ounces Silver Equivalent 1,056,078 1,101,593 484,122
Underground Development (m) 6,798 5,408 2,400
Diamond Drilling (m) 6,188 11,673 18,072
*Results for the period July 3 - December 31, 2012

Local Geology, Mineralization & Ore Types

La Guitarra is situated in the southern part of the Sierra Madre Occidental. The region is characterized by mafic volcanics of the Trans-Mexican belt superimposing the intermediate to felsic Eocene volcanics. The mine also hosts rocks from Mesozoic schist and slates to Tertiary age volcanics and intrusives. The area was mineralized due to the late Miocene volcanic disruptions.

The core of the district is a mineralized belt over 15 km long and at least 4 km wide, containing hundreds of documented epithermal veins. Mineralization is hosted in these vein type ore bodies in the form of quartz-monzonite compositions. Ag-Au mineralization is the product of a large low-sulfidation hydrothermal system. Ore grade mineralization is structurally controlled, and varies in size from narrow high-grade veins to bulk tonnage zones ranging up to 70 metres in width.

Reserves & Resources

First Majestic Silver Corp. as of March 31, 2015 filed a new La Guitarra NI 43-101, for more detailed geological information, readers are encouraged to review the company's most recent NI 43-101 Report