Outcrop Silver Reports Exceptional Sensor-Based ORE Sorting Results from LA Porfia Vein at Santa Ana
OUTCROP SILVER REPORTS EXCEPTIONAL
SENSOR-BASED ORE SORTING RESULTS
FROM LA PORFIA VEIN AT SANTA ANA
VANCOUVER, BC
,
June 17, 2025
/CNW/ -
Outcrop Silver & Gold Corporation
(TSXV: OCG)
(OTCQX: OCGSF) (DE: MRG)
("Outcrop Silver")
is pleased to report outstanding results from a
sensor-based ore sorting test conducted on mineralized material from the La Porfia vein, part of the
high-grade Santa Ana primary silver project in
Colombia
. The program, carried out by Steinert
Latinoamericana in
Brazil
, evaluated 25–75 mm and 12–25 mm size fractions using a Steinert KSS
CLI XT sorter—which combines X-ray Transmission (XRT), 3D laser profiling, and RGB optical
sensors. The results show that 17 % of the coarse feed was rejected as waste, while the sorted
product delivered a 20 % lift in AgEq grade and retained up to 99.2 % of the silver and 99.7 % of
the gold (Table 1). This demonstrates Santa Ana's potential for early, low-impact pre-concentration
that could meaningfully reduce mill size, operating costs, and environmental footprint.
"These exceptional sorting results—achieving a 20 % grade lift, 17 % waste rejection and up to 99.2
% silver and 99.7 % gold recoveries despite processing lower-grade La Porfía material—highlight
Santa Ana's amenability to modern, low-impact processing technologies," commented
Ian Harris
,
President & CEO. "This test underlines our opportunity to shrink the project footprint, lower costs
and bolster environmental performance. None of this is possible without the dedication of our on-site
teams and the strong partnership with local communities—together carrying a 400-year silver-mining
legacy forward and delivering superior value for our shareholders and the next generation."
Type
Mass Balance
Grades
Recoveries
Mass kg
Distribution
Ag g/t
Au g/t
AgEq
1
g/t
Ag
Au
Feed
203.7
100 %
276
2.66
476
Sorted Product
169.4
83 %
329
3.19
569
99.17
99.70
19 %
20 %
20 %
Grade Increase
Table 1. Summary results from Sensor-based ore sorting tests applied to mineralized material
from the La Porfia vein (Coarse fraction from 25 to 75 mm).
Sensor-based ore sorting was applied to mineralized material from the La Porfia vein, part of the
high-grade silver-gold epithermal system at the Santa Ana Project, to assess its suitability as a pre-
concentration method. The objective was to evaluate the potential for early waste rejection and feed
grade enhancement using advanced particle discrimination technologies.
Approximately 390 kg of material was prepared and delivered to Steinert Latinoamericana in
Belo
Horizonte, Brazil
, consisting of 300 kg of mineralized rock and 90 kilograms of barren waste rock,
collected from underground old workings in La Porfia. A sample of approximately 250 kilograms was
then separated from this material. Then, this 250 kg sample was prepared into two different size
fractions, resulting in approximately 200 kg of material ranging from 25 to 75 mm in size and around
50 kilograms of material ranging from 12 to 25 mm in size.
The sorting was performed using a STEINERT KSS CLI XT unit, which combined X-ray
Transmission (XRT) to detect atomic density (ideal for distinguishing silver-rich sulfide
mineralization), 3D Laser Profiling for shape recognition and positioning. Additionally, RGB and
Inductive sensors were also tested but played secondary roles.
1
Silver Equivalent
Metal prices used for equivalent calculations were
US$1,800
/oz for gold, and
US$25
/oz for silver.
Metallurgical recoveries based on Outcrop Silver's metallurgical test work are 97% for gold and 93%
for silver (see news release dated
August 23, 2023
). The equivalency formula is as follows:
Equivalency formula (CNW Group/Outcrop Silver & Gold Corporation)
Assays
The resulting sample fractions were sent for assaying to SGS-Geosol in Vespasiano, Minas Gerais,
Brazil
. The laboratory analytical codes used for Ag assays were GE_ICP40Q and ICP40B_S with
multi-acid digestion in both cases. The Au assays were determined by 50 grams fire-assaying with
code FAA505.
Qualified Person
Edwin Naranjo Sierra
is the designated Qualified Person within the meaning of the National
Instrument 43-101 and has reviewed and approved the technical information in this news release.
Mr. Naranjo holds a MSc. in Earth Sciences, and is a Fellow of the Australasian Institute of Mining
and Metallurgy (FAusIMM). Mr.
Naranjo Sierra
is a consultant to the Company and is therefore
independent for the purposes of NI 43-101.
About Santa Ana
The 100% owned Santa Ana project covers 27,000 hectares within the Mariquita District, through
titles and applications, known as the largest and highest-grade primary silver district in
Colombia
with mining records dating back to 1585.
Santa Ana's maiden resource estimate, detailed in the NI 43-101 Technical Report titled "Santa Ana
Property Mineral Resource Estimate," dated
June 8, 2023
, prepared by AMC Mining Consultants,
indicates an estimated indicated resource of 1,226 thousand tonnes containing 24.2 million ounces
silver equivalent at a grade of 614 grams per tonne and an inferred resource of 966 thousand tonnes
containing 13.5 million ounces at a grade of 435 grams per tonne. The identified resources span
seven major vein systems that include multiple parallel veins and ore shoots: Santa Ana (
San
Antonio
,
Roberto Tovar
,
San Juan
shoots); La Porfia (La Ivana); El Dorado (El Dorado, La Abeja
shoots); Paraiso (Megapozo); Las Maras; Los Naranjos, and La Isabela.
The drilling campaign aims to extend known mineralization and test new high-potential areas along
the permitted section of the project's extensive 30 kilometres of mineralized trend. This year's
exploration strategy aims to demonstrate a clear pathway to substantially expand the resource.
These efforts underscore the scalability of Santa Ana and its potential for substantial resource
growth, positioning the project to develop into a high-grade, economically viable, and environmentally
responsible silver mine.
About Outcrop Silver
Outcrop Silver is a leading explorer and developer focused on advancing its flagship Santa Ana high-
grade silver project in
Colombia
. Leveraging a disciplined and seasoned team of professionals with
decades of experience in the region. Outcrop Silver is dedicated to expanding current mineral
resources through strategic exploration initiatives.
At the core of our operations is a commitment to responsible mining practices and community
engagement, underscoring our approach to sustainable development. Our expertise in navigating
complex geological and market conditions enables us to consistently identify and capitalize on
opportunities to enhance shareholder value. With a deep understanding of the Colombian mining
landscape and a track record of successful exploration, Outcrop Silver is poised to transform the
Santa Ana project into a significant silver producer, contributing positively to the local economy and
setting new standards in the mining industry.
ON BEHALF OF THE BOARD OF DIRECTORS
Neither the TSX Venture Exchange nor its Regulation Services Provider (as such term is defined in
the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of
this release.
Certain information contained herein constitutes "forward-looking information" under Canadian
securities legislation. Generally, forward-looking information can be identified by the use of
forward-looking terminology such as "potential," "we believe," or variations of such words and
phrases or statements that certain actions, events or results "will" occur. Forward-looking
statements are based on the opinions and estimates of management as of the date such
statements are made and they are subject to known and unknown risks, uncertainties and other
factors that may cause the actual results, level of activity, performance or achievements of Outcrop
Silver to be materially different from those expressed or implied by such forward-looking
statements or forward-looking information, including: the receipt of all necessary regulatory
approvals, capital expenditures and other costs, financing and additional capital requirements,
completion of due diligence, general economic, market and business conditions, new legislation,
uncertainties resulting from potential delays or changes in plans, political uncertainties, and the
state of the securities markets generally. Although management of Outcrop Silver have attempted
to identify important factors that could cause actual results to differ materially from those contained
in forward-looking statements or forward-looking information, there may be other factors that cause
results not to be as anticipated, estimated or intended. There can be no assurance that such
statements will prove to be accurate, as actual results and future events could differ materially
from those anticipated in such statements. Accordingly, readers should not place undue reliance
on forward-looking statements and forward-looking information. Outcrop Silver will not update any
forward-looking statements or forward-looking information that are incorporated by reference.
SOURCE
Outcrop Silver & Gold Corporation
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For further information:
Ian Harris, Chief Executive Officer, +1 604 638 2545,
[email protected], www.outcropsilver.com; Kathy Li, Vice President of Investor Relations,
+1 778 783 2818, [email protected]
CO: Outcrop Silver & Gold Corporation
CNW 07:30e 17-JUN-25