Heliostar Samples 390 g/t Silver at Cumaro Project, Sonora, Mexico
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Heliostar Samples 390 g/t Silver at Cumaro Project,
Sonora, Mexico
Vancouver, Canada, April 6th, 2021 – Heliostar Metals Limited (TSX.V: HSTR, OTCQX: HSTXF, FRA: RGG 1)
("Heliostar" or the "Company") is pleased to announce a successful first pass sampling and mapping work at its
Cumaro Project in northern Sonora state, Mexico.
Program Highlights at Cumaro
• Silver values up to 390 grams per tonne (“g/t”) over 1 metre identified from channel sampling.
• Anomalous silver values greater than 1 g/t in eleven samples in an anomalous zone covering an area of
500 by 600m.
Heliostar geologists have identified an anomalous silicified structure with pyrite that returned a 1-metre channel
sample grading 390 g/t silver and which remains open to expand . This mineralization indicates a robust silver
endowment and shows the potential for high grades in the eastern block of the El Picacho district.
Additionally, eleven channel and rock samples have returned values greater than 1 g/t silver in a coherent
anomaly that covers an area measuring 500m by 600m. This area is an extension of the Dos Amigos vein into the
eastern block (Figure 1).
The high silver value s and the broader zone of anomalous silver zone are considered to represent the upper
extents of deeper vein system along strike from SilverCrest Metal’s El Picacho Project. The portion of the El
Picacho district on SilverCrest ’s ground consists of seven epithermal veins with over 10 k ilometres of strike
length. Veining and alteration on surface defines extensions of these veins eastward onto the Cumaro project
that have never previously been drilled.
The Cumaro project exploration is early stage and these results represent the first of several steps designed to
advance the Cumaro Project to a drill ready status.
Heliostar Exploration VP, Sam Anderson, commented “We are excited by the silver results from the start of the
Cumaro sampling and mapping campaign. These assays support our theory that Cumaro hosts precious metals
veining and mineralization at depth that is the along-strike extension of known veins at Picacho. Further work is
underway to follow-up these results, to sample the western portion of the claim and advance the project to a drill-
ready status.”
Cumaro Detail
The Cumaro project is a five square kilometre inset claim within the El Picacho district and hosts the extensions
of the El Picacho, Dos Amigos, and Basaitegui Veins (Figure 1). The current geological model indicates that a fault
divides the Picacho-Cumaro district into western and eastern halves . East of the fault, host rocks are down -
dropped, thereby preserving the vein system at depth. On the western side the veining and mineralization are
exposed at surface.
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Work on the western half of the district on exposed veins has defined robust mineralization from surface. In
February, SilverCrest announced the completion of 42 holes with 21 holes intercepting an average of 4.1 metres
estimated true vein width grading 8.14 g/t gold and 49.7 g/t silver1. However, on the eastern side, the veining
and mineralization is only partially exposed by erosion and the full vertical extent of the precious metals system
could be preserved at depth. No drilling has been undertaken on the eastern half of the district or within the
Cumaro claim. The El Picacho Project is a nearby project that is not owned by Heliostar Metals Limited. There is
no guarantee Heliostar will return similar exploration results as at El Picacho.
The recently completed Cumaro mapping and sampling campaign defined surface alteration corridors of clay and
silica-clay alteration, assemblages that support the interpreted shallow level of erosion in the eastern block at
Cumaro. These corridors display similar orientation to those in the western half of the district.
Most importantly, rock and channel sample assays support th is interpretation. The 390 g/t silver assay from a
channel sample in the eastern part of the claim demonstrates the potential for high grade mineralization and
may represent a pulse of mineralization which was able to travel upwards to the shallower environment. The
greater than 1 g/t silver anomaly that covers 500 by 600 metres, and remaining open, may represent the upper
extents of a mineralized system at depth. The most anomalous silver values occur within strongly silicified zones
that may be the upper extent of quartz veining.
Figure 1: Cumaro Sampling and Mapping
Notably to date only 60% of the Cumaro claim has been covered by outcrop mapping and sampling. The
remainder of the district exploration is in-progress.
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Numerous mine discoveries followed a similar path , where weakly anomalous silver or gold mineralization at
surface has provided evidence of robust mineralization at depth. That model applies here as well, based on the
epithermal style of mineralization common in this region.
Epithermal mineralization commonly displays strong vertical zonation. That occurs as metal rich fluids make their
way from depth to surface along faults or fractures. As the fluids travelled, they intersected a favourable zone
where the pressure rapidly decreased and deposited metals. The majority of the precious and base metals
carried by the fluid are deposited in that area and by the time the fluids arrive d at surface, they were depleted
in most of the precious metals and left only minor amounts of the precious metals to be sampled.
Examples of this discovery process include First Majestic’s Ermitaño (Santa Elena) deposit 20 kilometres to the
southeast and MAG Silver’s Juanicipio deposit in Zacatecas, Mexico.
At the Ermitaño deposit, gold values in the vein at surface above the discovery hole were less than 1 g/t, however,
the context of geologic setting encouraged drilling of the system. The first hole drilled about 100m below surface
and encountered 8.9 metres at 0.8 g/t gold and 9 g/t silver showing a clear pattern of grade i ncreasing with
depth. The fourth hole made the discovery, with 17.9 metres at 11.4 g/t gold and 86 g/t silver 2. It hit the
mineralized zone approximately 200 metres below surface. The Ermitaño Project is a nearby project that is not
owned by Heliostar Metals Limited. There is no guarantee Heliostar will return similar exploration results as at
Ermitaño.
Heliostar is exploring Cumaro with these projects in mind. The company plans to advance the Cumaro project to
a drill ready status through additional geological work and sampling. We look forward to announcing further
results.
About Heliostar Metals Ltd.
Heliostar is a well -financed junior exploration and development company with a portfolio of high -grade gold
projects in Alaska and Mexico. The company’s flagship asset is the 100% controlled Unga Gold Project on Unga
and Popof Islands in Alaska. The project hosts an intermediate sulfidation epithermal gold deposit, located within
the district-scale property that encompasses 240km2 across the two islands. Additional targets on the property
include porphyry, high sulphidation and intermediate sulphidation epithermal veins. On Unga Island, priority
targets include: the SH -1 and Aquila, both on the Shuma gin Trend, the former Apollo -Sitka mine, which was
Alaska’s first underground gold mine and the Zachary Bay porphyry gold -copper prospect. Gold mineralization
at the Centennial Zone is located on neighbouring Popof Island within four kilo metres of infrastructure and
services at Sand Point.
In Mexico, the company owns 100% of three early stage epithermal projects in Sonora that are highly prospective
for gold and silver. Cumaro forms part of the El Picacho district, while the Oso Negro and La Lola projects are
also prospective for epithermal gold-silver mineralization.
Note 1: SilverCrest Metals Inc. news release dated February 24, 2021 https://www.SilverCrestmetals.com/news/2021/index.php?content_id=462
Note 2: Evrim Resources Corp. news release dated April 19, 2017 https://we.ceo.ca/@newsfile/evrim-provides-update-on-ermitano-project
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Figure 2: Location of Heliostar’s projects in northern Sonora, Mexico
Qualified Person
The Company’s disclosure of technical or scientific information in this press release has been reviewed and
approved by Stewart Harris, P.Geo., Exploration Manager for the Company. Mr. Harris is a Qualified Person as
defined under the terms of National Instrument 43-101.
For additional information please contact:
Charles Funk
Chief Executive Officer
Heliostar Metals Limited
Email: [email protected]
Rob Grey
Investor Relations Manager
Heliostar Metals Limited
Email: [email protected]
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TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
Forward-Looking Information. This release includes certain statements that may be deemed "forward -looking
statements". Forward-looking statements are statements that are not historical facts and are generally, but not
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"potential" and similar expressions, or that events or conditions "would", "may", "could" or " should" occur.
Forward-looking statements in this press release include Heliostar’s plans to continue aggressive exploration at
Unga in 2021 and its goal of defining a resource in excess of one million ounces, its plan to continue infill drilling
to expan d to depth where the system remains open, and its belief that the SH -1 prospect has considerable
potential for expansion. Although Heliostar believes that the expectations expressed in such forward -looking
statements are based on reasonable assumptions, s uch statements are not a guarantee of future performance
and actual results may differ materially from those in the forward -looking statements. Factors that could cause
the actual results to differ materially from those in forward-looking statements include market prices, exploitation
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