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Junior Miner Hits Big Gold in Mexico

February 28, 2022 ( Newswire) This company has announced more excellent drill results from its project in Mexico, and the Critical Investor believes it is well on its way to prove 1Moz of heap leachable gold.

After completing the first 26 holes of its Phase 2 RC drill program at the California target, part of its Cervantes gold-copper project in Sonora, Mexico, on Jan. 26, Aztec Minerals Inc. (AZT:TSX.V; AZZTF:OTCQB) doesn’t seem to suffer a lot from common and extensive lab delays and continues to release excellent drill results after the first hole was returned just over a week ago. Back then, the result was a 88.4 meters @ 1.1g/t Au intercept, and more recently the company announced an even more impressive 167.2 meters @ 1.0g/t Au, as part of a batch of three holes.

These results are already very good for a standard open pit deposit. But in this case, Aztec is drilling out heap leachable mineralization as it is targeting the oxide cap of a potential porphyry, and heap leach operations have far better economics. A follow-up drill program is anticipated in a few months. As a reminder, the Cervantes oxides aren’t the only thing Aztec is looking to explore, as it is also planning a drill program for its Tombstone gold oxide project in Arizona for August this year, also enabling them to go after large porphyry/CRD potential at depth at both projects.

The releasing of strong drill results didn’t go unnoticed for investors, as there was significant volume right after the two most recent news releases, resulting in a healthy recovery:

Share price one year time frame (Source

And these are only the first four drill results, with many more to come. When all assays are announced, I expect the markets to have more awareness about Aztec for sure. The cash position is estimated at CA$1 million at the moment, and management is looking to raise more one to two months from now, also depending on drill results and general sentiment. For now, let’s have a closer look at the current drill results coming out of the California target.

The California target is located on a ridge and is only a small part of the Cervantes project. Seventeen holes were drilled in 2017-2018, with lots of economic intercepts, causing me to guesstimate resource potential on these holes alone at about 600koz Au. These earlier holes, and the recently drilled ones can be seen here on this map:

As can be seen, most holes are step-outs to the north, parallel to the earlier drilled holes. The red holes are the ones reported in the last news release, holes 002, 003 and 004. Hole 001 was reported a week before this, and is located directly right of 002.

The following table shows the complete results:

These results are very impressive, especially considering the grade, which is often much higher than the 2017-2018 holes nearby. For example, close to standout hole 004 we can find hole 18CER006, which intercepted 170 meters @ 0.42g/t Au. Another remarkable example is hole 001, which is located close to 18CER014, returning 98.5 meters @ 0.41g/t Au, which is considerably less than 61 meters @ 1.45g/t Au. Management doesn’t have an explanation for this, but it certainly is intriguing, and these holes alone have the potential to add another 100koz Au to my guesstimate.

Keep in mind true width is often smaller, as most holes have been drilled under an angle following the slopes of the ridges, as can be seen for this section of hole 003 for example:

If the remaining assays could emulate the 2017-2018 results, or even improve on them like the recent ones did, there is not too much doubt in my mind Aztec could be closing in on a 1Moz Au mineralized envelope. A good thing is that most of the intersected mineralization is oxidized according to the geologists, with only the bottom end representing transitional ore. As recoveries for this type of ore are also good for this project (bottle roll heap leach test gold recoveries 77.9%), management doesn’t mind too much.

Besides going after more oxides, let’s not forget Aztec is also hunting large porphyry targets at depth at Cervantes. Two holes of 500 meters depth have been completed at California to test the large IP chargeability anomaly at depth. The balance of the Phase 2 program tested an IP chargeability anomaly at California Norte, and an outcrop at the Jasper target. The remaining results are expected in the coming weeks.

The first four holes of the 26-hole program were actually drilled at the Purisiama East target, which had never seen drilling before. Unfortunately, these holes didn’t return any economic mineralization. According to President and Chief Executive Officer Simon Dyakowski, this target will not see more drilling this year as a consequence.

The program was designed to better define the open pit, heap leach gold potential of the porphyry oxide cap at California, evaluate the potential for deeper copper-gold porphyry sulfide mineralization underlying the oxide cap, test for north and west extensions of the California mineralization at California North and Jasper, and assess the breccia potential of Purisima East. Although not all results are in, based on handheld inspection of cores, management believes it might have done well on most goals except Purisima East. Breccia potential has been proven at California and California North, which is important as it indicates a widespread mineralization event.

Aztec will now carry out channel sampling and geologic mapping of the new drill roads at California, California Norte and Jasper, as well as to expand surface sampling and mapping on the property in general, in order to continue the 2021 Phase 1 surface program. After this, all exploration results will likely be released, it will be most likely time to do another raise, and management expects to start drilling the Phase 2 5,000 meter drill program somewhere in April-May.

As Aztec isn’t just advancing Cervantes, but is also advancing their Tombstone project in Arizona, I asked CEO Dyakowski what to expect here.

He answered that they have a 5,000 meter drill program planned for August of this year. This upcoming Phase 3 drill program will be designed to target deeper epithermal gold-silver mineralization below the Contention pit, and the coveted deep CRD silver-lead-zinc-copper-gold mineralization in Paleozoic limestones underlying the Bisbee Sediments.


The first drill results at the California target were pretty impressive, with hole 004 as absolute highlight, intercepting 167.2 meters @ 1.0g/t Au from surface. Considering this is almost all oxides, as Aztec is looking to delineate a heap leach deposit, this is an excellent intercept all around. For heap leaching, a grade of 0.30-0.40g/t Au would already be economic, so the actually drilled grade over such a distance with no overburden is nothing short of sensational. Of course, not all drill results were as good and I would be surprised if many of the upcoming ones would come close with these kind of numbers as well, but it certainly looks like Aztec has a very decent shot at delineating at least 1Moz Au at California. In my view, the same potential is present at their Tombstone project in Arizona, and both projects have geophysics completed on them, indicating large, deep targets for both. So in fact investors might be looking at four potential company makers. Still early days, but Aztec already has a good look on two of them. Stay tuned.

I hope you will find this article interesting and useful, and will have further interest in my upcoming articles on mining. To never miss a thing, please subscribe to my free newsletter on in order to get an email notice of my new articles soon after they are published.

All presented tables are my own material, unless stated otherwise.

All pictures are company material, unless stated otherwise.

All currencies are in U.S. Dollars, unless stated otherwise.

Please note: the views, opinions, estimates, forecasts or predictions regarding Aztec Minerals’ resource potential are those of the author alone and do not represent views, opinions, estimates, forecasts, or predictions of Aztec Minerals or Aztec Minerals’ management. Aztec Minerals has not in any way endorsed the views, opinions, estimates, forecasts, or predictions provided by the author.

The Critical Investor is a newsletter and comprehensive junior mining platform, providing analysis, blog and newsfeed and all sorts of information about junior mining. The editor is an avid and critical junior mining stock investor from The Netherlands, with an MSc background in construction/project management. Number cruncher at project economics, looking for high-quality companies, mostly growth/turnaround/catalyst-driven to avoid too much dependence/influence of long-term commodity pricing/market sentiments, and often looking for long-term deep value. Getting burned in the past himself at junior mining investments by following overly positive sources that more often than not avoided to mention (hidden) risks or critical flaws, The Critical Investor learned his lesson well, and goes a few steps further ever since, providing a fresh, more in-depth, and critical vision on things, hence the name.

The author is not a registered investment advisor, and has a long position in this stock. Aztec Minerals is a sponsoring company. All facts are to be checked by the reader. For more information go to and read the company’s profile and official documents on, also for important risk disclosures. This article is provided for information purposes only, and is not intended to be investment advice of any kind, and all readers are encouraged to do their own due diligence, and talk to their own licensed investment advisors prior to making any investment decisions.

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