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Stellar AfricaGold - District-Scale Soil Sampling Defines Further Gold Exploration Targets at Zuénoula, Cote D’Ivoire

Exploration Programs Sampling & Geoscience Results

Vancouver, BC – March 11, 2026 Stellar AfricaGold Inc. (“Stellar” or the “Company”) provides the following update on the exploration progress at the Stellar-MetalsGrove Joint Venture Zuénoula Gold Project, Cote d’Ivoire.

Highlights

  • A second gold exploration target designated as the Fifty-Five Area has been identified by district-scale soil sampling (1km × 1km) on Zuénoula.
  • The Fifty-Five Area, situated 1km north of the Central Area (see News Release February 5, 2026), is defined by four gold anomalous soil samples over a strike length of 2.4 km. Infill (400 m x 400 m) soil sampling of a 10 km² area has been completed along the interpreted northeast (NE) structural trend. Assay results are pending.
  • In the Central Area, infill soil sampling on a 400 m × 400 m grid has been completed, with PortablePPB assay results extending the strike length of the gold anomalous sample cluster to 3.4 km. Assay results are pending.
  • The Central Area infill has been expanded to 20 km² to capture the potential northeast strike extension of this trend, with this additional 400 m × 400 m infill soil sampling also completed. Assay results are pending.
  • Infill soil sampling of a third area - the South East Corner Area – on a 400 m by 400 m grid has also been completed to investigate a favourable structural target on the margin of a granite intrusion. Assay results are pending.
  • All Fifty-five Area, Central Area and South East Corner infill soil samples will soon be delivered to Bureau Veritas laboratory in Abidjan this week for fire assay determination of gold – a total gold extraction technique. Assay results are expected in mid to late March.
  • Coherent gold anomalous zones defined by these fire assay results will be infilled on a 100 m × 50 m grid as the final stage of soil sampling. This high density of sampling is required for target definition and drill hole planning.

Stellar-MetalsGrove Joint Venture Zuénoula Gold Project, Cote d’Ivoire.

The Stellar-MetalsGrove Zuénoula Gold Project is a joint venture exploration project between Stellar’s Ivorian subsidiary Aucrest SARL (“Aucrest”) and MetalsGrove Mining Ltd. subsidiary, MetalsGrove CDI Pty Ltd (MetalsGrove) to advance Stellar’s 395.78 square kilometer early-stage exploration permit called Zuénoula in Côte d’Ivoire. Pursuant to the joint venture agreement MetalsGrove, the project operator, may earn up to a 50% interest in the Zuénoula Gold Project by incurring US$3,000,000 in exploration expenditures and up to an 80% interest in the Zuénoula Gold Project by incurring a total of US$6,000,000 in exploration expenditures. (For further details of the Stellar-MetalsGrove Joint Venture Agreement see Stellar news release December 9, 2025.)

Stellar Management Commentary

Stellar President and CEO J. François Lalonde commented:

“We are pleased with the pace of exploration by MetalsGrove at the Zuénoula Gold Project and with the early results identifying now three areas of anomalous gold in the soil sampling. This is indeed very encouraging. I extend our continuing thanks to the MetalsGrove exploration team on this successful start.”

MetalsGrove Management Commentary

MetalsGrove Managing Director and CEO, Mr Lijun Yang, commented:

“The identification of a second gold target at the Fifty-Five Area highlights the scale and growing prospectivity of our Zuénoula PR750 permit. With soil sampling already infilled on a 400 m × 400 m grid and with all assay results pending, we are rapidly advancing this emerging target while continuing to expand the footprint of gold anomalism at the Central Area.

The recent PortablePPB results from the Central Area have extended the gold anomalous strike length to 3.4 km and the area of infill sampling increased to 20 km2 to capture the potential northeastern extension of this northeast-trending zone of gold anomalism. All infill sampling has been completed. Fire assay results from MSALabs in Yamoussoukro will provide a more definitive assessment of gold tenor and support detailed 100 m × 50 m follow-up sampling aimed at planning drill targets.”

Zuénoula Soil Sampling Update

Stellar is pleased to announce is pleased to announce that work on the Zuénoula permit has defined three exploration target areas that have been infilled with soil samples on 400m × 400m grids (Figure 1). Assay results are pending.

1. The Fifty-five Area: A northeast-trending alignment of three gold anomalous soil samples (11 - 55dU) extends over 2.4km within a 10 km2 area. Limited fire assay analysis also returned a soil sample assaying 23ppb Au. Infill sampling (400m x 400m) has been completed, and samples will be transported to Bureau Veritas in Abidjan for fire assay analysis of all samples this week.

2. The Central Area: A northeast-trending alignment of seven gold anomalous soil samples (11 - 50dU) extends over 3.4km within a 20 km2 area. Limited fire assay analysis returned soil samples assaying 49ppb Au (PortablePPB 33 dU) and 49 ppb (PortablePPB 19dU). Infill sampling (400m x 400m) has been completed, and samples will be transported to Bureau Veritas in Abidjan for fire assay analysis of all samples this week. A geologist is also currently mapping and collecting rock-chip samples for analysis.

3. The South East Corner: A favourable structural target located along contact of an interpreted elliptical granite has been covered by higher density sampling even though broad-spaced 1km x 1km soil samples did not return anomalous soil assays. Infill sampling (400m x 400m) has been completed, and samples will be transported to Bureau Veritas in Abidjan for fire assay analysis of all samples this week.

Figure 1. Zuénoula soil sampling progress and exploration targets (3) on aeromagnetic image (RTP)

The Fifty-Five Area, located 1km north of the Central Area, is defined by four gold anomalous soil samples over a strike length at 2.4 km. Infill (400 m x 400 m) soil sampling of a 10 km² area has been completed along an interpreted northeast (NE) structural trend. All infill soil assay results are pending.

Infill sampling of the initial 13km2 Central Area has been completed on a 400 m × 400 m grid and PortablePPB assays received (Figure 1). These results further increase the strike-length of the Central Area gold anomalous cluster (trend) to 3.4km. The Central Area has now been expanded to 20km2 to cover the NE-strike of this potential gold anomalous trend. Sampling has been completed and assay results are pending.

Infill soil sampling of the South East Corner Area on a 400 m × 400 m grid to investigate a favourable structural target located along the margin of an interpreted elliptical granite intruded into mafic volcanics has also been completed. Assay results are pending.

All Fifty-five Area, Central Area and South East Corner infill soil samples will soon be delivered to Bureau Veritas in Abidjan for fire assay determination of gold. Coherent gold anomalous zones defined by these fire assay results will then be used to plan the final stage of infill, with soils collected on a 100m × 50m grid. This density of sampling is required for target definition and drill hole planning.

About the Zuénoula Gold Project

The Stellar-MetalsGrove Zuénoula Gold Project is a joint venture exploration project between Stellar’s Ivorian subsidiary Aucrest SARL (“Aucrest”) and MetalsGrove Mining Ltd. subsidiary, MetalsGrove CDI Pty Ltd (MetalsGrove) to advance Stellar’s 395.78 square kilometer early-stage exploration permit in Côte d’Ivoire. The Zuénoula permit is strategically situated along the Abujar–Napié gold trend within the Oumé–Fetekro Birimian greenstone belt in central Côte d’Ivoire, 100km north of the Abujar Gold Mine and 160 km south of the Napié Gold Deposit.

Figure 2. Geology Map of the Central West Gold Project and Historical Exploration Results1

1 Historical BLEG results sourced from African Gold Limited Annual Report 2023; Historical Auger drilling result sourced from Ricca Resources Limited Financial Report for half year ending 31 December 2021.

QA/QC

JORC Code, 2012 Edition – Table 1 Section 1- Sampling Techniques and Data

CriteriaJORC Code ExplanationCommentary
Sampling• Nature and quality of sampling (e.g.No drilling has been undertaken on Vavoua
Techniquescut channels, random chips, orPR-454.
specific specialized industry standard
measurement tools appropriate to theSoil samples collected for Vavoua PR-454
minerals under investigation, such asare to be assayed by fire assay at Bureau
down hole gamma sondes, orVeritas laboratory in Côte d’Ivoire, and
handheld XRF instruments, etc.) Theseselected samples analyses by PortablePPB
examples should not be taken asat the SEMS field compound in Zuénoula.
limiting the broad meaning of
sampling.SOIL SAMPLING STAGES
• Include reference to measures taken• Stage 1: Initial, permit-wide, broad-
to ensure sample representivity andspaced soil sampling on an 800m x 800m
the appropriate calibration of anygrid
measurement tools or systems used.• Stage 2: Gold anomalous clusters and
• Aspects of the determination oftrends defined by multiple anomalous soil
mineralisation that are Material to thesamples are then infilled with soil
Public Report.samples collected on 400m x 400m grid.
• Stage 3: Coherent gold soil anomalies are
In cases where ‘industry standard’ workthen infilled with soil samples collected
has been done, this would beon a 100m x 50m grid
relatively simple (e.g. ‘reverse• All samples are to be analysed by fire
circulation drilling was used to obtainassay at Bureau Veritas laboratory in Côte
1 m samples from which 3 kg wasd’Ivoire, with selected samples analysed
pulverised to produce a 30 g charge forby PortablePPB at the SEMS compound in
fire assay’). In other cases, moreZuénoula.
explanation may be required, such as• The assay results from this higher-density
where there is coarse gold that hassampling (100m x 50m) permit trenching
inherent sampling problems. Unusualand drilling to be planned.
commodities or mineralisation types
(e.g. submarine nodules) may warrantSOIL SAMPLING PROCEDURES
disclosure of detailed information.• The highly experienced consulting group
SEMS Exploration Services (SEMS) has
been contracted by MGA to conduct the
soil sampling
• Up to 4 sampling crews may be active
• The MGA Exploration Manager was onsite
at the start of the field program to instruct
the sampling crew on the Standard
Sampling Procedure required by MGA
• MGA provided SEMS Exploration Services
with an Excel table listing the designated
sample point locations using WGS-84
UTM zone 29N coordinates
• Each soil sample is collected from within
50 metres of the designated sample point,
with the actual sample point then
recorded
• At each sample point: 1) the organic rich
soil is brushed away, 2) a 40cm deep hole
dug and the sample collected by taking a
channel-cut along the bottom 20cm of the
hole, 3) 1000g of the minus 2mm sieved
fraction of each sample is collected from
the sample point, 4) gold is determined
by fire assay (LDL 2ppb) and with selected
samples also analysed by PortablePPB
(LDL ~6dU )
• Duplicate samples are collected every
20th sample, certified reference material
(CRM) inserted every 20th samples and
blanks inserted every 20th sample
• PortablePPB is a partial gold extraction
technique, whereas fire assay is a total
gold extraction technique
• Samples are processed and stored at the
secure SEMS field compound in
Zuénoula.
Drilling• Drill type (e.g. core, reverse• No drilling has been undertaken.
Techniquescirculation, open-hole hammer, rotary
air blast, auger, Bangka, sonic, etc.)
and details (e.g. core diameter, triple
or standard tube, depth of diamond tails,
face-sampling bit or other type, whether core
is oriented and if so, by what method, etc).
Drill Sample• Method of recording and assessing• No drilling has been undertaken.
Recoverycore and chip sample recoveries and
results assessed.
• Measures taken to maximise sample
recovery and ensure representative
nature of the samples.
• Whether a relationship exists between
sample recovery and grade, and
whether sample bias may have
occurred due to preferential loss/gain
of fine/coarse material.
Logging• Whether core and chip samples• No drilling has been undertaken.
have been geologically and• Soil samples are comprehensively logged
geotechnically logged to a level offor a range of parameters including
detail to support appropriate Mineralcolour, soil horizon, sample weight,
Resource estimation, mining studiesslope, dominant grain size (clay, silt,
and metallurgical studies.sand), general topography, residual or
• Whether logging is qualitative ortransported, proximity to artisanal
quantitative in nature. Core (orworkings, other ground disturbances
costean, channel, etc.) photography.such as field plowing, and general land
• The total length and percentage ofuse (grassland, plantation, crop, etc.).
the relevant intersections logged.
Sub-sampling• If core, whether cut or sawn and• No drilling has been undertaken.
Techniqueswhether quarter, half or all core• The 1000g -2mm soil fraction collected in
and Sampletaken.the field is riffle split at the SEMS field
Preparation• If non-core, whether riffled, tubecompound in Zuénoula into two 500g
sampled, rotary split, etc. andsub-samples
whether sampled wet or dry.• Selected 500g sub-samples are analysed
• For all sample types, the nature,by PortablePPB
quality and appropriateness of the• All 500g sub-samples are analysed by fire
sample preparation technique.assay at Bureau Veritas in Abidjan
• Quality control procedures adopted• The two 500g splits (sub-samples) of the
for all sub-sampling stages toinitial 1000g sample are obtained using a
maximise representivity of samples.riffle splitter to ensure adequate mixing of
• Measures taken to ensure that thethe 1000g field sample.
sampling is representative of the in-
situ material collected, including, for
instance, results for field
duplicate/second-half sampling.
• Whether sample sizes are appropriate
to the grain size of the material being
sampled.
Quality of• The nature, quality andPORTABLE-PPB ANALYSIS
Assay Data andappropriateness of the assaying and• Selected 500g sub-samples are analysed
Laboratorylaboratory procedures used andusing the patented detectORE™ process
Testswhether the technique is considereddeveloped by Portable PPB Pty Ltd in
partial or total.Australia
• For geophysical tools,• The process involves a partial extraction
spectrometers, handheld XRFusing the safe, non-dangerous GLIX-20®
instruments, etc., the parametersreagent that is akin to traditional BLEG
used in determining the analysis,(which uses a cyanide leach)
including instrument make and• The 500g samples are added to the
model, reading times, calibrationreagent and tumbled for 12 hours, into
factors applied, andwhich the detectORE™ collector device
their derivation, etc.had been inserted
• Nature of quality control procedures• After the bottle roll process has
adopted (e.g. standards, blanks,completed, the collector device is
duplicates, external laboratoryremoved, washed, and dried prior to
checks) and whether acceptablereading on a Vanta M (VMR) pXRF loaded
levels of accuracy (i.e. lack of bias)with Evident/Olympus’s detectORE™
and precision have been established.mode
• The entire process is managed using
Portable PPB’s Portable Lab Information
Management System (pLIMSTM), which
records all aspects of the sample
throughput, including QAQC and control
of the pXRF via the Application
Programming Interface to
Olympus/Evident’s co-developed
detectORE™ mode.
• Certified Collector Devices (CCDs)
supplied by PortablePPB with known
quantities of gold ranging from 0 -1000
ppb are used to check that the pXRF was
functioning correctly and that the
instrument settings were as intended.
One CCD serves as a blank.
• The pLIMS software confirmed the
instrument settings are correct and the
VMR is operating as expected, controlled
by the pLIMS API and Evident’s
detectORE™ firmware.
Verification of• The verification of significant• The detectORE™ process is checked in
Sampling andintersections by either independentaccordance with PortablePPB’s
Assayingor alternative company personnel.recommended processes and
• The use of twinned holes.procedures. These include the insertion
• Documentation of primary data, dataof 400g reference materials (RMs).
entry procedures, data verification,• The RMs comprise mixtures of
data storage (physical and electronic)commercial Certified Reference
protocols.Materials (CRMs) and barren regolith
• Discuss any adjustments to assaymaterial. The RMs are of known, but
data.uncertified gold concentration and are
used to check that the leach and collect
process has worked as intended during
the 12-hour bottle roll.
• RMs were inserted at a rate of 1 every 44
samples throughout the sample
batches. The RMs were checked against
Portable PPB’s cloud-based database
and passed within the accepted
tolerance ranges for the technique,
currently 20% (3 sigma).
• The pXRF instrument settings are
checked using a range of Certified
Collector Devices, which are used to
confirm the pXRF is operating as
expected. The pXRF spectral files are
reviewed by Portable PPB’s cloud and
SME procedures.
FIRE ASSAY ANALYSIS
• All samples are analysed for gold by fire
at Bureau Veritas laboratory in Cote
d’Ivoire
• The original 1000g -2mm sample
collected in the field is split into two
500g sub-samples using a riffle splitter.
One 500g sub-sample is kept as a
reference sample and may be used for
PortablePPB analysis. The second 500g
sub-sample is used for gold analysis by
fire assay (Lab Code: FE450, LDL 2ppb)
• At the laboratory, the 500g -2mm sub-
sample is dried and pulverised to 85%
passing 75 microns.
• This sample pulp is then mixed with a
combination of chemical reagents,
which when heated to high temperatures
results in the formation of a lead button
and slag. The lead button that contains
the precious metals (including gold) is
cupelled at high temperature. The lead is
adsorbed by the cupel leaving behind a
bead that contains the precious metals.
• The bead is acid digested and analysed
by AAS, with a lower detection limit of
2ppb Au
Location of• Accuracy and quality of surveys used• A handheld GPS is used to locate the soil
Data Pointsto locate drillholes (collar and down-data positions, with a +/-5m vertical and
hole surveys), trenches, minehorizontal accuracy
workings and other locations used in• Sample locations (UTM WGS-84 zone
Mineral Resource estimation.29N) and sample descriptions are noted
• Specification of the grid system used.on a standard form in the field and
• Quality and adequacy of topographicentered on a computer of an evening
control.• GPS measurements of sample positions
are sufficiently accurate for exploration
targeting of gold systems.
Data Spacing• Data spacing for reporting Exploration• An 800m by 800m offset grid pattern has
andResults.been adopted for the entire project area,
Distribution• Whether the data spacing andexcluding areas of irrigated sugar cane
distribution is sufficient to establishand villages.
the degree of geological and grade• Broad-spaced soil sampling (800m by
continuity appropriate for the Mineral800m) and low level gold fire assay
Resource and Ore Reserve estimationanalysis (LDL 2ppb) is considered an
procedure(s) and classificationseffective technique for identifying and
applied.delimiting gold anomalous clusters and
• Whether sample compositing hastrends, which are then followed up with
been applied.higher density sampling at 400m × 400m
and 100m x 50m as the next phases of
sampling ahead of trenching and drill
testing of coherent gold soil anomalies.
Orientation• Whether the orientation of sampling• The sample location configuration has
of data inachieves unbiased sampling ofbeen deliberately planned to avoid
relation topossible structures and the extent todirectional bias.
geological alwhich this is known, considering the
structuredeposit type.
• If the relationship between the drilling
orientation and the orientation of key
mineralised structures is considered to
have introduced a sampling bias, this
should be assessed and reported if
material.
Sample• The measures taken to ensure sample• 1000g of the -2mm sieved fraction of soil
securitysecurity.samples are collected in plastic bags,
assigned individual sample numbers and
transported to the secure SEMS lab and
compound in Zuénoula
• Samples are analysed by fire assay at
Bureau Veritas in Côte d’Ivoire and are
personally transported to the laboratory
by a senior member of the SEMS crew.
Audits or• The results of any audits or reviews of• The sampling and assay techniques
Reviewssampling techniques and data.adopted by MetalsGrove has been
effectively used in the Vavoua-Kounahiri
district, and more widely in Côte d’Ivoire,
to define drill targets and it is considered
an effective initial approach for defining
gold anomalous lithogeochemical trends.

Section 2 - Reporting of Exploration Results (Criteria listed in the preceding section also apply to this section.)

CriteriaJORC Code ExplanationCommentary
Mineral• Type, reference name/number, location• Following the acquisition of the three
Tenement andand ownership, including agreements orGEMICA joint venture (JV) permits PR-
Land Tenurematerial issues with third parties such as454 (granted), PR-1063 (application) and
Statusjoint ventures, partnerships, overridingPR-1102 (application) in Côte d’Ivoire,
royalties, native title interests, historicalMetalsGrove entered into another JV
sites, wilderness or national park andwith TSX-V listing company Stellar
environmental settings.AfricaGold Inc. (Stellar) on PR-750
• The security of the tenure held at the timeZuénoula.
of reporting, along with any known• Vavoua PR-454 was granted on 3 Dec
impediments to obtaining a licence to2025 for an initial four-year period,
operate in the area.renewable for two additional three-year
periods.
• The Vavoua permit is located with
Kounahiri West, Vavoua West and
Zuénoula permits occupy a combined
area of 1,315 km², strategically situated
along the Abujar–Napie gold trend
within the Oumé–Fetekro Birimian
greenstone belt in central west of Côte
d’Ivoire, approximately 100 km north of
the Abujar gold mine and 160 km south
of the Napié gold project.
Exploration• Acknowledgement and appraisal of• MetalsGrove is not aware of any
Done by Otherexploration by other parties.previous systematic exploration for gold
Parties.having been conducted within either
Vavoua PR-454, Vavoua West PR-1102,
Kounahiri West PR-1063 and Zuenoula
PR-750.
Geology• Deposit type, geological setting, and style• The Vavoua, Vavoua West, Kounahiri
of mineralisation.West and Zuénoula permits are located
in the central west of Côte d'Ivoire at the
south edge of the West Africa craton.
This region is the world’s largest
Proterozoic gold-producing region, and
Côte d’Ivoire contains 35% of the
region’s Birimian Group rocks, which
host multiple multi-million-ounce gold
deposits
• The GEMICA JV permits and Stellar JV
permit, together cover a combined area
of 1,315 km², and are strategically
situated along the Abujar–Napié gold
trend within the Oumé–Fetekro Birimian
greenstone belt, and are located
approximately 100 km north of the
Abujar gold mine and 160 km south of
the Napié gold project.
Drillhole• A summary of all information material• No drilling results are included in this
Informationto the understanding of the explorationrelease.
results, including a tabulation of the
following information for all Material
drill holes:
• easting and northing of the drillhole collar
elevation or RL (Reduced Level –
elevation above sea level in metres) of
the drillhole collar dip and azimuth of the
hole
• down hole length and interception depth
hole length.
Data• In reporting Exploration Results,• No data aggregation methods were
Aggregationweighting averaging techniques,applied to the soil sampling data.
Methodsmaximum and/or minimum grade
truncations (e.g., cutting of high grades)
and cut-off grades are usually Material
and should be stated.
• Where aggregate intercepts incorporate
short lengths of high-grade results and
longer lengths of low-grade results, the
procedure used for such aggregation
should be stated, and some typical
examples of such aggregations should be
shown in detail.
• The assumption used for any reporting
of metal equivalent values should be
clearly stated.
Relationship• If the geometry of mineralisation with• Not applicable.
Betweenrespect to the drillhole angle is known, its
Mineralisationnature should be reported.
Widths and
Intercept
Lengths
Diagrams• Appropriate maps and sections (with• See maps in the body of the report.
scales) and tabulations of intercepts
should be included for any significant
discovery being reported. These should
include, but not be limited to, a plan view
of drillhole collar locations and
appropriate sectional views.
Balanced• Where comprehensive reporting of all• The soil assay data has been interpreted
ReportingExploration Results is not practicable,by the MGA Exploration Manager who
representative reporting of both low andhas more than 40 years of gold
high grades and/or widths should beexploration experience. MGA assay
practiced, avoiding misleading reportingresults are also interpreted with
of Exploration Results.reference to the surface geochemical
expressions of more than 15 of the
major gold discoveries in Cote d’Ivoire.
Other• Other exploration data, if meaningful and• Any meaningful data and relevant
Substantivematerial, should be reported, includinginformation have been included in the
Exploration(but not limited to): geologicalbody of this release.
Dataobservations; geophysical survey results;
geochemical survey results; bulk
samples – size and method of treatment;
metallurgical test results; bulk density,
groundwater, geotechnical and rock
characteristics; potential deleterious or
contaminating substances.
Further Work• The nature and scale of planned further• Soil sampling has also commenced on
work (e.g. tests for lateral extensions, oradjoining MGA-Stellar JV permit PR750
depth extensions, or large-scale step-outZuénoula
drilling).• Soil sampling will commence on
• Diagrams clearly highlighting the areas ofadjoining permits PR1063 and PR1102
possible extensions, including the mainonce decree of grant has been issued by
geological interpretations and futurethe Government of Côte d'Ivoire
drilling areas, provided this information is• The images included in this
not commercially sensitive.announcement show the location of soil
sample sited, sampled and planned, in
the current programs.