Spotlight On: Mammoth Resources

November 9, 2020


Featured Image: Deep canyons give spetacular views in the Sierra Madre as we ascend to the Tenoriba Project. (Photo: Mammoth Resources)

A trip to the arid climate of Mexico, the high plateaus and deeply incised valleys in the heart of the prolific Sierra Madre Precious Metal Belt in southwestern Chihuahua State, takes us to the exciting Mammoth Resources’ Tenoriba Project (Figure 1).

Figure 1 – Sierra Madre Mountain, Chihuahuan plains and Chihuahua city. Taken from Mammoth Resources Oct 19, 2020 Press Release.

Mammoth Resources (TSX-V: MTH) is a Toronto-based mining Company, that combines an extensive background in mineral exploration, mine development and experience in the mining industry to acquire and define precious metals (gold and silver) in Mexico and other attractive jurisdictions in America. One of the projects that the Company is actively exploring is the Tenoriba project.

The Tenoriba project comprises three concessions in Sierra Madre Occidental in the SW corner of Chihuahua State, in the Municipality of Guadalupe y Calvo (Figure 2).

Figure 2 – Location of Tenoriba Property. Taken from Mammoth Resources 2019 Technical Report.

For hundreds of years the Tenoriba Property was explored by small-scale artisanal mining. This changed in 2007 when Masuparia carried out an exploration program in the area. A combination of preliminary mapping, stream sediment, soil, rock chip sampling and drilling identified a gold-polymetallic anomalously mineralized area of approximately 15 km2 [1]. From 2009 to 2011 Minera Alta Vista was active on the property and the sampling work made by the Company on samples from small artisanal mines returned anomalous gold and silver values, above 1.0 gram/tonne gold.

The exploration work made by Mammoth Resources from 2012 onwards confirmed the presence of an anomalously mineralized in gold with polymetallic minerals area of 15 km2 area, striking approximately E-W. It is hosted on highly altered volcanic units of Tertiary age that are part of the Sierra Madre Occidental (SMO) upper volcanic sequence [3].

We can find several exciting highlights in the exploration program that Mammoth Resources carried out, including:

  • Porphyry-style mineralization at El Moreno area (at the western portion of the mineralized area), with disseminated sulphides, complex stockwork-sulphide rich veinlets yielding intersections of lower grade gold and the presence of copper, grading 59% Cu.
  • Potentially economic grades of gold-silver mineralization at the Los Carneritos area (eastern portion of the mineralized trend), grading 52 g/t gold Eq over 126.8 metres, including 1.21 g/t gold Eq. over 25.0 metres. This denounces the potential for the discovery of a large, economical gold-silver mineralized body.
  • Within the Central-Masuparia there are instances where precious metal mineralization is associated with the general trend of the structures (a set of E-W normal displacement faults parallel to the general trend of mineralization, a second set of NE-SW faults and a third set trends NW-SE). The drilling program intercepted 5 metres grading 1.32 g/t gold Eq and 27.0 m grading 0.63 g/t gold Eq. This reveals opportunity to delineate gold mineralization.
Figure 3 - Surface Map - Drill Hole Locations- Tenoriba Property

The encouraging results of Mammoth’s most recent drilling program reveal that the Tenoriba Property is an area with great potential for new and exciting discoveries. Mammoth is currently advancing with surface access permits and awaits approval of the drill permit for up to 139 drill sites [3]. Team Spotlight cannot wait to see where Tenoriba will take Mammoth Resources in the future.


All information contained in the above article is taken from the Mammoth Resources (website below):

Mammoth Resources:

[1] Masuparia Gold Corp. Report on the First Drilling Campaign, J. Cyrret, April 2009.

[2] Mammoth Resources Technical Report (dated 2019):

[3] News Release (dated 5th November 2020):