Expanding Mineralized System, Cajueiro District, Brazil
Altamira Gold Intersects 395.5m @ 0.4 g/t gold
in First Deep Drill Hole at Maria Bonita,
Expanding Mineralized System, Cajueiro
District, Brazil
Vancouver, British Columbia--(Newsfile Corp. - October 15, 2025) -
Altamira Gold Corp. (TSXV:
ALTA) (FSE: T6UP) (OTCQB: EQTRF)
("
Altamira
" or the "
Company
") is pleased to report assay
results from drill hole MBA032, the first deep drill hole below the Maria Bonita porphyry gold mineral
resource, which forms part of the Cajueiro district and where ongoing drilling is directed at enlarging the
mineral resource footprint and defining its depth extent.
Highlights:
Drill hole MBA032 at Maria Bonita returned
395.5m @ 0.4g/t gold
from 44.5m depth in quartz
porphyry intrusive rocks
MBA032 was located 50m to the south of MBA029 which previously intersected
213m @ 0.8 g/t
gold
including
146m @ 1.0 g/t gold
and significantly extends the size of the mineralized porphyry
system, particularly at depth
Gold values returned from MBA032 are remarkably continuous with only three 1 meter samples
exceeding 2g/t gold in the pervasively mineralized interval
The higher grade core to the Maria Bonita gold deposit, which is interpreted to plunge to the south-
east will be targeted by drill hole MBA033 and further deep drill holes during this drill campaign
CEO Mike Bennett commented; "The first deep drill hole at Maria Bonita has demonstrated that the
quartz porphyry intrusion is mineralized throughout. Results from MBA032 indicate that the
mineralized system is considerably larger than previously thought, which has important implications
for growing the resource base. The very consistent grade of the quartz porphyry at Maria Bonita,
together with indications of a higher-grade core averaging plus 1g/t gold, and the significant size of the
mineralized system, all suggest the possibility of a considerably larger mineralized system than
previously envisaged.
Additional drilling is currently in progress aimed at further defining the down-plunge extension of the
higher-grade core to the deposit that sub-crops in the area of the initial drilling and was intersected by
drill hole MBA029 which returned 146m @ 1g/t Au from 23m depth. This zone is interpreted to plunge
to the southeast and remains open."
CAJUEIRO DISTRICT
The Cajueiro district is located approximately 75km NW of the town of Alta Floresta in the state of Mato
Grosso (Figure 1) in central western Brazil. The project is easily accessible by road, lies on open
farmland and has grid power and a local water supply. Cajueiro is the most advanced of the key projects
that Altamira controls in the region (Figure 1).
Figure 1: Location of Altamira Gold's projects in the Alta Floresta Belt.
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The Cajueiro district consists of two independently estimated gold mineral resources at Cajueiro Central
and Maria Bonita, plus a series of additional untested exploration targets within a radius of 8km of
Cajueiro Central.
The Cajueiro Central area has a current open pit resource
1
of 5.66Mt @ 1.02 g/t gold for a total of
185,000 oz in the Indicated Resource category and 12.66Mt @ 1.26 g/t gold for a total of 515,000 oz in
the Inferred Resource category (estimated using a cut-off grade of 0.25g/t gold and a gold price of
US$1,500/oz).
The Maria Bonita open pit resource consists of Indicated Resources of 24.19Mt @ 0.46g/t gold (for a
total of 357,800oz) and Inferred Resources of 25.64Mt @ 0.44g/t gold (for a total of 362,400oz)
2
. These
resources were calculated using a 0.2 g/t gold cut-off grade and a gold price of US$2,780/oz. These
resources include near-surface saprolite Indicated Resources of 2.02Mt @ 0.59g/t gold (38,000oz) and
Inferred Resources of 0.68Mt @ 0.40g/t gold (8,700oz).
The Maria Bonita porphyry gold deposit forms part of a district-scale portfolio of prospects that are
interpreted as having a similar geological origin. Gold mineralization, which is defined by the source
zones of a 15km stretch of former alluvial deposits worked along the Teles Pires river, is related to a
pronounced east-west corridor extending over 8km and defined by both an alignment of gold anomalies
in soils and rock chips and a set of sub-cropping intrusions of different ages and compositions, implying
a long standing and deep-seated crustal structure.
Figure 2: Cajueiro district mineral resources at Cajueiro Central and Maria Bonita (white labels for sub-
sectors) and prospects (yellow labels). An alignment of six of the targets occur in close spatial
association to a pronounced east-west fault corridor marked by later gabbroic dykes.
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Maria Bonita Drilling
The objective of the current drill program at Maria Bonita is to enlarge the footprint of the known mineral
resource by drill testing for potential extensions to the existing resource, including its depth extent, and
new satellite targets.
The first drill hole, MBA032, was drilled 100m south of MBA029 and was completed to a depth of 546
metres and intersected the same mineralized quartz porphyry intrusive that was intersected in previous
drilling (see Figure 3). The hole returned 395.5m @ 0.4 g/t gold. As with previous holes, the
mineralization is remarkably consistent with a highest single assay interval of 5.96 g/t gold being
returned from MBA032.
There is notably more brecciation in the core from MBA032 compared to MBA029, located to the north
on the same section which intersected 146m @1.0g/t gold from 23m depth (see press release dated
May 22, 2024). This may indicate that MBA032 was drilled closer to the edge of the higher-grade
section of the mineralized intrusive body than MB029.
Figure 3: Composite drill section including MBA032 and previously reported holes MBA029, MBA013
and MBA031, showing the geology and composite grade intervals plus the previously optimised pit
profile for the NI43-101 mineral resource estimate.
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Table 1: Bulk assay intervals over 0.5g/t gold showing the consistency of values in relation to peak assay
values (normally for 1 metre samples).
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The interpretation of the drill results is ongoing to better guide a second deep drill hole, currently
underway, collared 100m to the east of MBA032. This hole is directed at the south-east plunge
continuation of the core of the mineral resource. (Figure 4).
Figure 4: Locations of drill holes from the past campaign (white) and the current campaign (yellow). The
background shows interpreted major structures within the broad, trapezoid-shaped magnetic low that
hosts the alteration and mineralization. The optimised pit outline is derived from the maiden mineral
resource estimate
2
(June 2025).
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Qualified Person
Guillermo Hughes, FAIG and M Aus IMM., a consultant to the Company as well as a Qualified Person as
defined by National Instrument 43-101, supervised the preparation of the technical information in this
news release.
About Altamira Gold Corp.
The Company is focused on the exploration and development of gold projects within western central
Brazil, strategically advancing five projects spanning over 100,000 hectares within the prolific Juruena
Gold Belt-an area that has historically yielded over 6 million ounces of placer gold
3
. The Company's
advanced Cajueiro project contains two gold deposits. The central area comprises NI 43-101 resources
of 5.66Mt @ 1.02 g/t gold for a total of 185,000 oz in the Indicated Resource category and 12.66Mt @
1.26 g/t gold for a total of 515,000oz in the Inferred Resource category. In addition, the Maria Bonita gold
deposit comprises additional open pit Indicated Resources of 24.19Mt @ 0.46g/t for a total of
357,800oz, and Inferred Resources of 25.64Mt @ 0.44g/t for a total of 362,400oz.
Ongoing exploration and fieldwork at Cajueiro indicate the presence of multiple porphyry gold systems,
reinforcing its potential for district-scale development. These hard-rock gold sources align with historical
alluvial gold production, highlighting the region's exceptional gold endowment and potential scalability.
With two independently established mineral resources, a highly prospective geological setting and a
track record of significant discoveries, the Company is well-positioned to unlock further value across its
extensive land package.
1
NI 43-101 Technical Report, Cajueiro Project, Mineral Resource Estimate: Global Resource Engineering, Denver Colorado USA, 10
th
October
2019; Authors K. Gunesch, PE; H. Samari, QP-MMSA; T. Harvey, QP-MMSA
2
NI43-101 Technical Report, Mineral Resource for the Maria Bonita Prospect: VMG Consultoria, Belo Horizonte, Minas Gerais, Brazil.
12
th
June
2025; Author V. Myadzel
3
Juliani, C. et al; Gold in Paleoproterozoic (2.1 to 1.77 Ga) Continental Magmatic Arcs at the Tapajós and Juruena Mineral Provinces
(Amazonian Craton, Brazil): A New Frontier for the Exploration of Epithermal-Porphyry and Related Deposits. Minerals 2021, 11, 714.
https://doi.org/10.3390/min11070714
On Behalf of the Board of Directors,
ALTAMIRA GOLD CORP.
"Michael Bennett"
Michael Bennett
President & CEO
Tel: 604.676.5661
Toll-Free:1-833-606-6271
www.altamiragold.com
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in
policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this
release.
The securities described herein have not been registered under the U.S. Securities Act or any state
securities laws, and may not be offered or sold in the United States absent registration or an
applicable exemption from registration requirements under the U.S. Securities Act and any applicable
state securities laws.
Forward-looking Statements
Certain information contained herein constitutes "forward-looking information" under Canadian
securities legislation.
Forward-looking information includes, but is not limited to, statements with
respect to the extension of the Warrants.
Generally, forward-looking information can be identified by
the use of forward-looking terminology such as "will", "intends" 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 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.
Although management of the Company has 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.
The Company will not update any forward-looking statements or forward-looking
information that is incorporated by reference herein, except as required by applicable securities laws.
Notes
Gold analysis has been conducted by SGS method FAA505 (fire assay of 50g charge), with higher grade samples checked by FAA525. Analytical
quality is monitored by certified references and blanks. Until dispatch, samples are stored under the supervision the Company's exploration office.
The samples are couriered to the assay laboratory using a commercial contractor. Pulps are returned to the Company and archived. Drill holes
results are quoted as down-hole length weighted intersections.
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