Precious Metals
February 28, 2022

Sierra Madre Gold and Silver (TSX.V: SM)

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Hits 12M Of 2.91 G/T Aueq At La Tigra


Sierra Madre Gold and Silver (TSX.V: SM) has released additional results from trenching and a project update at its La Tigra project located in the state of Nayarit, Mexico. Trench intercepts are located northwest of the previous announced trenches (see news release dated Nov. 16, 2021) and are summarized in the table below.

Gregory K. Liller, Sierra Madre's chief operating officer, states: "I am very pleased to see the continued success of the La Tigra trenching program. These three trenches, together with the previously released trenching results, confirm our view that the Districo del Tigre has significant gold and silver potential."

Trenching was conducted using picks and shovels to expose bedrock with continuous channels then cut with a portable rock saw and samples removed using hammers and chisels.

La Tigra Project Update
Luis Saenz, director of exploration and development, states: "We have gained safe access to the 100 and 200 levels of the historic El Tigre mine. Initial underground mapping indicates the structural fabric of the area is more complex, containing both primary and antithetic structures which host quartz veins and breccias along with a surrounding quartz stockworks. It has been my experience in other gold silver districts in Mexico that this type of structural pattern has the potential to be economically very significant."

Continued district-wide surface mapping, sampling and trenching have delineated a northwest trending structural corridor three kilometres in length hosting multiple northwest striking veins and breccia zones along with crosscutting northeast structures.

The underground workings of the historic El Tigre mine have now been secured and access has been gained to the 100 and 200 levels. Mapping and surveying are under way and will be used to update and improve the 3-D model for the mineralized structures in the El Tigre South area shown in the map and cross-section below. Work thus far indicates historic mining focused on ore found between surface and the upper 100 level.

Mapping on the 200 level has shown workings were driven on both the main El Tigre vein and north trending antithetic structures. These antithetic veins consist of a second set of mineralized structures which crosscut the main mineralized trends. Antithetic structures have been found to be important hosts for ore mined at Ocampo, El Cubo, La Guitarra and other mines in Mexico.

All of this valuable information is going into 3-D modelling and the planning of the upcoming drilling campaign at La Tigra.

Sierra Madre Gold and Silver best practice

Sierra Madre is committed to best practice standards for all exploration and sampling activities. The company's exploration programs have been conducted following CIM Exploration Best Practice Guidelines which are incorporated by reference in National Instrument 43-101. Analytical quality assurance and quality control procedures include the systematic insertion of blanks, standards and duplicates into the sample strings. Samples are placed in sealed bags and shipped directly to Bureau Veritas Lab located in Durango, Mexico, for 30-gram gold fire assay and multielement analyses by acid digestion.

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