San Marco Confirms Exploration Model for New Copper/Silver Discovery at Chunibas and Updates Exploration Plans in Preparation for Drilling
San Marco Confirms Exploration Model for New Copper/Silver Discovery at
Chunibas and Updates Exploration Plans in Preparation for Drilling
Vancouver, B.C. – March 26th, 2018: San Marco Resources Inc. (SMN: TSX-V) ("San Marco"
or “the Company”) reports results of ongoing exploration at its wholly-owned Chunibas Project in
eastern Sonora State, Mexico and the development of a model for copper-silver genesis on the
Project that will guide exploration plans in preparation for a drill program on the high -grade
copper-silver mineralization discovery.
As announced on January 10, 2018, Chunibas hosts a stratiform, volcanic hosted copper/silver
zone. The stratiform, volcanic hosted style of mineralization seen at Chunibas shares
remarkable similarities to productive copper-silver deposits in Chile but has no comparison in
Mexico. An independent geological expert in this style of mineralization recently confirmed to
San Marco that the mineralization is identical to that of the copper-silver systems in northern
Chile. This suggests that the processes responsible for development of the Chilean ore deposits
(such as the ones from Mantos Blancos district) may have also occurred at Chunibas.
Observed similarities between the Chunibas copper/silver mineralization and known and
comparable Chilean systems include:
• Mineralized top and bottoms of intermediate volcanic rock units. Mineralized volcanics at
Chunibas display brecciation and vesicles similar to Chilean deposits.
• High grade and stratiform-like mineralization with variable dimensions along strike and
down-dip.
• Non-supergene specularite-bornite-chalcocite-(digenite) and covellite assemblage and
paragenesis.
• Early stage alteration assemblage is comprised by epidote-chlorite-quartz-specularite.
Robert Willis, San Marco’s CEO commented, “Our understanding of this new discovery has
rapidly advanced in the last three months. We now have a type deposit to use as an exploration
guide and we’ve enlarged the field crew to accelerate advancement of the discovery. It’s
encouraging to know there are successful mines based on the same deposit type elsewhere in
the world. Like Chunibas, Chilean deposits have mineralized zones that can be visually subtle
and contain few accessory minerals that respond to indirect survey methods. We need to map
and sample outcrop exposures in detail to maximize the effectiveness of a maiden drill
campaign. We’re working hard to get that done as quickly and completely as possible.”
At Chunibas mineralized outcrops are difficult to sample due to their craggy and erratic nature.
Where continuous chip channel sampling over stratiform units could be completed, examples
assays results from the discovery zone are;
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• 10.5 metres of 1.13% copper and 16.91 g/t silver
• 7 metres of 2.19% copper and 27.3 g/t silver.
Ongoing exploration in preparation for drilling includes;
• Continued detailed geological mapping over the entire 1.7 km of known strike length.
Mineralized volcanic units tend to have slightly varied composition and fabrics compared
to less mineralized units, therefore, detailed mapping of individual units is important. In
addition, mapping efforts are focused on the identification and distribution of different
copper sulphides since these (similar types of Chilean systems) show specific zoning of
different forms of copper mineralization.
• Hand trenching outward from known mineralized outcrops with the intention of defining
the continuity between and within the multiple mineralized units and between current
surface exposures.
• An XRF (X-ray fluorescence) rock (outcrop) analysis program for copper/silver over
every outcrop within the known extensions of the mineralized corridor. Handheld XRF
units provide immediate geochemical analysis (similar but more qualitative than a
laboratory assay) of rock exposures. This technique is widely used by exploration
companies for fast analysis of metals and pathfinder elements.
For related images, please visit the Chunibas Project on the Company’s website.
About San Marco
San Marco Resources Inc. is a Canadian mineral exploration company with a portfolio of
promising projects in mining-friendly Mexico, including the Chunibas, Mariana and 1068
Projects in Sonora State.
San Marco actively pursues strategic project generation program focused on high-caliber, low
acquisition cost opportunities in northwestern Mexico. The Company has a committed
management team with extensive experience in Mexico and a proven track record of building
shareholder value.
On behalf of the Board of Directors:
Robert Willis, P. Eng.
President & CEO
For further information, contact:
Nancy Curry Paul MacDonald
[email protected] [email protected]
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National Instrument 43-101 Disclosure
This news release has been approved by San Marco's CEO, Robert D. Willis, P. Eng. a "Qualified
Person" as defined in National Instrument 43-101, Standards of Disclosure for Mineral Projects of the
Canadian Securities Administrators. He has verified the data disclosed, including sampling, analytical and
test data, underlying such technical information by reviewing the assay reports provided to San Marco by
its independent testing laboratory.
The Company has implemented quality assurance (“QA”) and quality control (“QC”) programs to ensure
sampling and analysis of all exploration work is conducted in accordance with the best possible practices.
All sampling programs are carried out in a caref ul and diligent manner using scientifically established
sampling practices designed and tested to ensure that the results are representative and reliable. Quality
control programs appropriate to the type of sample and the mineralization are implemented, in cluding
such measures as external blanks, standards and duplicate samples. The security of samples from
sample acquisition to analysis is a vital component of the sampling process. Procedures include the use
of secure core logging, sampling, storage and preparation facilities as appropriate and the prompt, secure
and direct shipping of samples to the laboratories. Appropriate sample security procedures are employed
given the geographic and topographic conditions and the logistics created by the site location.
Forward Looking Information
Information set forth in this document may include forward-looking statements. While these statements
reflect management's current plans, projections and intents, by their nature, forward-looking statements
are subject to numerous risks and uncertainties, some of which are beyond the control of San Marco.
Readers are cautioned that the assumptions used in the preparation of such information, although
considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue
reliance should not be placed on these forward-looking statements. San Marco's actual results, programs,
activities and financial position could differ materially from those expressed in or implied by these forward-
looking statements.
Neither the TSX Venture Exchange nor the Investment Industry Regulatory Organization of Canada
accepts responsibility for the adequacy or accuracy of this release.