JAG.TO · 2025-09-09 12:00:00

Jaguar Mining Inc. Reports Encouraging Results at Chamé Target, Highlighting Potential FOR Open-Pittable Deposit IN Brazil __________________________________________________________________________________________

Corporate Updates

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

JAGUAR MINING INC. REPORTS ENCOURAGING RESULTS AT CHAMÉ TARGET, HIGHLIGHTING

POTENTIAL FOR OPEN-PITTABLE DEPOSIT IN BRAZIL

__________________________________________________________________________________________

TORONTO, September 9, 2025 – Jaguar Mining Inc. (“Jaguar” or the “Company”) (TSX: JAG) is pleased to

announce encouraging results from its ongoing exploration program at the Chamé target. Chamé is located within

the Company’s Paciência complex, southeast of the Santa Isabel mine in Brazil’s prolific Iron Quadrangle . These

results highlight the presence of near-surface gold mineralization with potential for scale, which could represent an

important step toward developing an open-pittable operation.

A SIGNIFICANT STEP TOWARDS OPEN-PITTABLE POTENTIAL

Since the Company’s last update (see press release dated March 4, 202 4), the exploration team has been

advancing work along the Paciencia trend. This focused effort followed the identification of a notable gold-in-soil

anomaly stretching four kilometers by 500 meters southeast of the Santa Isabel mine, within the highly prospective

Chamé-Cedro trend. Building on encouraging initial rock sampling results and the new interpretations of advanced

geophysical data suggesting near-surface mineralization, the Company initiated a targeted trenching program.

Results from the first three trenches (TR01, TR02, and TR03), excavated 100 meters apart and totaling over 428

meters in length, have returned consistent gold values across broad intervals. This suggests widespread gold

mineralization rather than isolated occurrences (see Figure 1).

Highlights from the initial trenches include:

• Trench TR02: 54.47 meters averaging 0.90 grams per tonne gold (g/t Au), including 4.43 meters at 7.1 g/t Au.

• Trench TR01: 42.0 meters averaging 0.45 g/t Au and 33.0 meters averaging 0.31 g/t Au.

• Trench TR03: 20.51 meters averaging 0.21 g/t Au.

These encouraging results demonstrate broad, low-grade mineralized zones that also contain localized, high-grade

intervals (see Figures 2 and 3) . This pattern is commonly associated w ith large-scale gold deposits suitable for

open-pit mining. Based on current interpretations, the potential mineralized zone is estimated to have true

thicknesses ranging from approximately 75 to 100 meters.

STRATEGIC ADVANTAGE SUPPORTS GROWTH POTENTIAL

A key strategic advantage of the Chamé target is its location near the Company’s existing processing facilities ,

which could provide important logistical and economic benefit s and support a more efficient development path

should the project advance to production. Combined with the widespread and consistent nature of the near-surface

mineralization and the project’s scale within a proven gold district, Chamé represents an attractive growth

opportunity. Should further exploration confirm this potential, the target co uld become an important contributor to

the Company’s long-term growth.

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

ACCELERATED PATH FORWARD: DEFINING THE FUTURE

Building on these encouraging results, the Company is accelerating its exploration program at Chamé. A

comprehensive drilling campaign is planned to begin later this year. This work will be important for better defining

and expanding the mineralized zones, helping to systematically evaluate the project’s potential and informing future

development planning.

Luis Albano Tondo, Chief Executive Officer of Jaguar Mining, commented: "The results at Chamé represent

an important step for Jaguar. The consistent, broad gold mineralization observed to date highlights the potential for

an open-pittable deposit, complementing our existing high -grade underground operations. Its proximity to our

processing facilities further underscores the project’s strategic value and potential to become an important asset

for the Company. We are excited about the opportunity to define a new, large-scale gold deposit in the heart of the

Iron Quadrangle."

Armando Massucatto, Exploration Manager for Jaguar Mining, added: "Chamé represents an important

development in our understanding of gold mineralization along the São Vicente Lineament. What was once

interpreted primarily as narrow vein systems is now recognized as broader, potentially high-volume gold deposits

with significant disseminated mineralization. These results provide new prospects for major discoveries in the

Paciência area, reinforcing its importance as a key exploration frontier for the Company and highlighting the skill

and dedication of our exploration team."

A WORLD-CLASS GOLD PROVINCE

The Chamé target is located within the São Vicente Lineament, a renowned gold -rich region within Brazil's prolific

Iron Quadrangle (see Figure 4). This geological structure has historically hosted world -class, multi-million-ounce

gold mines, including the Morro Velho mine operated by Anglo Gold Ashanti , which produced approximately 11

million ounces of gold. This lineament represents a major mineralized crustal shear zone extending for at least 60

kilometers, with a proven history of significant gold deposits.

Jaguar is well-positioned in this highly prospective area, holding the second -largest gold land position in the Iron

Quadrangle, covering over 46,000 hectares. Ongoing exploration at Chamé continues to support the potential for

meaningful new gold discoveries in this historically significant mining area (see Figure 5).

The trenching program returned continuous gold values above 0.4 g/t Au across most of the channel samples from

TR01 and TR02. These results highlight the presence of broad, low -grade mineralized zones, with localized high -

grade intervals, interpreted as feeder structures, yielding values above 1.5 g/t Au (see Figure 1).

Trench TR01

• CMCH01: 8.0m @ 0.33 g/t Au

• CMCH02: 42.0m @ 0.45 g/t Au, including 25.0m @ 0.56 g/t Au and 6.0m @ 0.93 g/t Au

• CMCH03: 33.0m @ 0.31 g/t Au, including 6.0m @ 0.52 g/t Au

Trench TR02

• CMCH05: 54.47m @ 0.90 g/t Au, including 32.22m @ 1.29 g/t Au and 4.43m @ 7.1 g/t Au

• CMCH06: 24.78m @ 0.41 g/t Au, including: 11.39m @ 0.50 g/t Au and 12.94m @ 0.52 g/t Au

Trench TR03

• CMCH008: 0.49m @ 0.21 g/t Au

• CMCH011: 8.40m @ 0.28 g/t Au

• CMCH012: 13.36m @ 0.20 g/t Au; and 20.51m @ 0.21 g/t Au

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

Note: the thicknesses indicated for the channels are apparent . In sections TR01 and TR02 (see Figures 2 and 3),

it can be observed that the estimated true thickness for the mineralized zone ranges between 75 and 1 00 meters.

Figure 1: Satellite image of the Chamé target showing the locations of trenches TR01 to TR03. Chip samples

indicate higher-grade zones within the historic Portuguese excavations.

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

Figure 2: Geological section 01 in TR01 (looking north) showing channels and chip samples on the surface with

the planned drillholes . The estimated true thickness of the potential mineralized zone ranges from approximately

75 to 100 meters.

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

Figure 3: Geological section 01 in TR02 (looking north) showing channels and chip samples on the surface. The

estimated true thickness of the potential mineralized zone ranges from approximately 7 5 to 100 meters.

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

Figure 4: Regional context of the Paciência Trend within the São Vicent Lineament (LSV). The LSV hosts several

significant gold deposits, including the Morro Velho Mine, which historically produced approximately 11 million

ounces of gold.

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

Figure 5: Geological map of the Paciência Trend showing the Santa Isabel mine and the Chamé target area.

JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

Table 1: Chamé Trenches Intersections.

Trench Channel

From

(m)

Interval

(m)

Gold

Grade

(g/t Au)

Potential

Orebody

Zone

TR01 CMCH001 23.00 31.00 8.00 0.33

CHAMÉ

MIDDLE -

LOW

GRADE

TR01 CMCH002 12.00 54.00 42.00 0.45

TR01 incl. 28.00 53.00 25.00 0.56

TR01 CMCH002 34.00 40.00 6.00 0.93

TR01 CMCH003 0.00 33.00 33.00 0.31

TR01 incl. 0.00 6.00 6.00 0.52

TR02 CMCH005 0.00 54.47 54.47 0.90

TR02 incl. 5.22 37.46 32.24 1.29

TR02 incl. 22.92 27.35 4.43 7.10

TR02 CMCH006 9.14 33.92 24.78 0.41

TR02 incl. 10.19 21.58 11.39 0.50

TR02 CMCH006 67.81 80.75 12.94 0.52

TR03 CMCH008 0.00 10.49 10.49 0.21

TR03 CMCH011 0.00 8.40 8.40 0.28

TR03 CMCH012 0.00 13.36 13.36 0.20

TR03 CMCH012 41.97 62.48 20.51 0.21

Qualified Person

Scientific and technical information contained in this press release has been reviewed and approved by Armando

José Massucatto, PhD, FAusIMM, Exploration Manager, who is also an employee of Jaguar Mining Inc. and is a

"qualified person" as defined by National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-

101").

The Iron Quadrangle

The Iron Quadrangle has been an area of mineral exploration dating back to the 16th century. The discovery in

1699–1701 of gold contaminated with iron and platinum -group metals in the southeastern corner of the Iron

Quadrangle gave rise to the name of the town Ouro Preto (Black Gold). The Iron Quadrangle contains world -class

multi-million-ounce gold deposits such as Morro Velho, Cuiabá, and São Bento. Jaguar holds the second largest

gold land position in the Iron Quadrangle with over 46,000 hectares.

About Jaguar Mining Inc.

Jaguar Mining Inc. is a Canadian -listed junior gold mining, development, and exploration company operating in

Brazil with three gold mining complexes and a large land package with significant upside exploration potential from

mineral claims. The Company's principal operating assets are located in the Iron Quadrangle, a prolific greenstone

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