Intercepts extracted and reviewed by Strikepoint from the issuer’s filings. True widths may differ from downhole widths; see the full release for drill orientation.
G Mining Ventures Extends High-Grade Mineralization at Gurupi and Confirms Continuity at Depth at TZ
BROSSARD, Quebec, Sept. 16, 2026 (GLOBE NEWSWIRE) -- G Mining Ventures Corp. (“GMIN” or the “Corporation”) (TSX:GMIN | OTCQX:GMINF) today provides an update on its exploration drilling activities completed at its wholly owned Gurupi Project (“Gurupi” or the “Project”) in Maranhão state, Brazil and Tocantinzinho mine (“TZ”) in Pará State, Brazil. At Gurupi, drilling continues to demonstrate extensions to known mineralization at the Blanket (“Blanket”) and Mandiocal (“Mandiocal”) deposits and while maiden drilling at the Grodiocal target (“Grodiocal”) has confirmed a new near-surface gold discovery. At TZ, drilling below the current pit design confirms the continuity of mineralization at depth, while regional exploration is identifying additional opportunities across a broader mineralized corridor.
Intercepts are indicated in metres (“m”) and grade in grams per tonne of gold (“g/t Au”).
New highlights include:
Gurupi
Blanket: Broad intercepts extend mineralization approximately 250 metres beyond the 2025 Mineral Resource Estimate (“MRE”), with results including 79.6 m at 1.78 g/t Au and63.5 m at 1.28 g/t Au
Mandiocal: Mineralization extended up to 125 m below the 2025 MRE pit shell, including 48.4 m at 1.32 g/t Au and 35.0 m at 1.37 g/t Au
Grodiocal: Maiden drilling confirmed a new, near-surface gold discovery, highlighted by 23.0 m at 1.97 g/t Au, including9.0 m at 4.24 g/t Au and10.0 m at 3.42 g/t Au
An updated MRE is expected to be complete before year-end, which will form the basis of a Preliminary Economic Assessment (“PEA”) targeted to be completed by the end of 2026
TZ
Drilling up to 150 metres below the current pit design confirms continuity of mineralization at depth
Results include 78.1 m at 1.81 g/t Au, including 16.0 m at 4.34 g/t Auand51.0 m at 1.31 g/t Au, including 7.80 m at 6.42 g/t Au
Regional exploration has defined a 15 km by 3 km mineralized corridor hosting the Tocantinzinho deposit and multiple satellite targets.
“The results from our 2026 exploration programs continue to validate the significant potential we see across both Gurupi and Tocantinzinho. At Gurupi, drilling has successfully extended mineralization at Blanket and Mandiocal while confirming a new gold discovery at Grodiocal, further demonstrating the district-scale potential of the Project. At TZ, drilling below the current pit design continues to confirm the continuity of mineralization at depth, while regional exploration is identifying additional opportunities across a broader mineralized corridor. As we advance an updated MRE and PEA at Gurupi, these programs continue to strengthen our pipeline of organic growth opportunities in Brazil.”
Gurupi hosts approximately 43.5 million tonnes (“Mt”) grading 1.31 g/t Au, which contain 1.8 million ounces (“Moz”) of Indicated Resources and 18.5 Mt grading 1.29 g/t Au containing 0.8 Moz of Inferred Resources as estimated in the 2025 MRE, distributed across the Blanket, Contact, Chega Tudo and Mandiocal deposits (Figure 1). Since exploration drilling resumed in November 2025, the Corporation has completed 32,610 m in 186 holes across Blanket, Mandiocal and Grodiocal. The program is testing extensions to existing mineralized systems and evaluating the newly discovered Grodiocal target along the prospective Chega Tudo-Mandiocal corridor.
Figure 1 - Gurupi Deposits
Blanket Drilling Intersects Mineralization Beyond Current Resource Limits At Blanket, drilling continues to test the potential for further extensions of mineralization beyond the current MRE. Nineteen diamond drill holes for 6,323 m have been completed with assay results received for seven holes and results pending for 12 holes (Table 1). Recent drilling has intersected mineralization approximately 250 m beyond the current MRE, supporting the interpretation of down-plunge continuity and indicating that the deposit remains open for follow-up drilling (Figures 2a, 2b and 2c). Structural analysis indicates that multiple folding events have enhanced both the thickness and grade distribution of mineralization, creating broad zones that remain only partially tested. Results from the ongoing program support continued evaluation of the deposit along plunge and at depth.
Table 1: Significant Blanket Drilling Highlights
Hole ID
From (m)
To (m)
Au (g/t Au)
Length* (m)
Composite
GUD-26-019
202.0
234.0
0.67
32.0
32.0 m at 0.67 g/t Au
GUD-26-021
254.0
284.0
1.38
30.0
30.0 m at 1.38 g/t Au
Incl.
254.0
263.1
2.21
9.1
9.1 m at 2.21 g/t Au
And
265.0
269.0
2.64
4.0
4.0 m at 2.64 g/t Au
GUD-26-023
170.0
233.5
1.28
63.5
63.5 m at 1.28 g/t Au
Incl.
197.0
210.5
3.21
13.5
13.5 m at 3.21 g/t Au
GUD-26-026
240.0
272.5
2.28
32.5
32.5 m at 2.28 g/t Au
Incl.
240.0
247.0
6.78
7.0
7.0 m at 6.78 g/t Au
GUD-26-029
145.5
225.1
1.78
79.6
79.6 m at 1.78 g/t Au
Incl.
215.3
225.1
3.49
9.8
9.8 m at 3.49 g/t Au
And
180.7
185.7
3.17
5.0
5.0 m at 3.17 g/t Au
*True width estimated at 95% of the length
Figure 2a - Section through Blanket Deposit
Figure 2b - Section through Blanket Deposit
Figure 2c - Section through Blanket Deposit
Mandiocal Drilling Confirms Down-Plunge Continuity At Mandiocal, gold mineralization is hosted within a dacitic volcanic unit. Twenty-four diamond drill holes for 6,787 m have been completed, with assay results received for 13 holes and results pending for 11 holes (Table 2). The objective was to evaluate the lateral and depth extensions of the deposit. Drilling has intersected mineralization up to 125 m below the 2025 MRE pit shell while demonstrating increased thickness of the mineralized system at depth (Figure 3). These results support the interpretation of southeast down-plunge continuity and indicate that mineralization remains open beyond the limits of the current resource model.
Maiden Drilling Confirms the Grodiocal Gold Discovery
Grodiocal is a newly identified discovery located northwest of Mandiocal along the prospective Chega Tudo trend, where no historical drilling had previously been completed. The maiden program comprised 17,667 m in 127 holes, including 22 diamond drill holes and 105 Reverse Circulation holes, and identified multiple zones of near-surface gold mineralization within a corridor extending approximately 5 km in strike length and up to 1 km in width (Table 3). Mineralization is hosted within deformed sedimentary rocks of the Chega Tudo Formation. The results establish Grodiocal as a priority target for follow-up drilling to better define the geometry, continuity, and extent of the mineralized zones (Figure 4).
Results from the Gurupi exploration program will be evaluated for inclusion in an updated MRE. The Corporation is also advancing a PEA targeted for year-end 2026, which is expected to evaluate potential development scenarios for the Project.
TZ Continues to Deliver Near-Mine and District-Scale Opportunities
While Gurupi represents an important future growth platform, TZ remains the foundation of GMIN’s Brazilian operations and a key source of near-mine organic growth. Exploration at the operation is focused on testing mineralization below the current pit design and advancing a growing pipeline of regional targets across the broader district. Together, these programs are intended to support future resource evaluation and mine-planning opportunities around GMIN’s cornerstone producing asset in Brazil.
TZ Drilling Confirms Mineralization Below the Current Pit Recent drilling completed up to 150 m beneath the current pit design continues to demonstrate the continuity of mineralization at depth and provides potential for mineral resource conversion or additions, subject to additional drilling, geological modelling and economic evaluation (Figure 5). Recent drilling from four holes (2,548 m) returned broad mineralized intervals supporting the extension of the mineralized system below currently defined mining limits (Table 4).
Table 4: Significant TZ Drilling Highlights
Hole ID
From (m)
To (m)
Au (g/t Au)
Length (m)
Composite
BRZ-25-121
369.4
447.5
1.81
78.1
78.1 m at 1.81 g/t Au
Incl.
427.0
443.0
4.34
16.0
16.0 m at 4.34 g/t Au
And
461.5
466.3
1.48
4.8
4.8 m at 1.48 g/t Au
491.0
506.0
1.11
15.0
15.0 m at 1.11 g/t Au
BRZ-26-129
502.5
513.0
4.62
10.5
10.5 m at 4.62 g/t Au
611.0
630.0
1.52
19.0
19.0 m at 1.52 g/t Au
Incl.
612.0
616.0
4.97
4.0
4.0 m at 4.97 g/t Au
BRZ-26-132
563.0
569.0
1.30
6.0
6.0 m at 1.30 g/t Au
BRZ-26-134
371.0
422.0
1.31
51.0
51.0 m at 1.31 g/t Au
Incl.
382.0
389.8
6.42
7.8
7.8 m at 6.42 g/t Au
430.0
457.0
1.08
27.0
27.0 m at 1.08 g/t Au
Incl.
440.0
446.0
3.03
6.0
6.0 m at 3.03 g/t Au
550.0
554.0
1.87
4.0
4.0 m at 1.87 g/t Au
*True width estimated at 85% of the length
These results improve the geological understanding of the mineralized system below the current pit design and identify areas for continued drilling and evaluation in future resource and mine-planning studies.
Figure 5 – Long section of the TZ deposit
Regional Program Advances TZ Exploration Pipeline Beyond the existing deposit, regional exploration has established a new district-scale exploration framework centered on a 15-km by 3-km mineralized transtensional corridor that hosts the TZ deposit and numerous satellite targets. Exploration is increasingly focused on structural intersections between the main NW-SE (TZ trend) and E-W structures, which are interpreted to be key controls on mineralization. This work has identified multiple priority targets, providing a growing pipeline of near-mine and regional growth opportunities.
Exploration along newly defined trends has delineated several mineralized zones over a strike length exceeding 3 km and has returned rock sample assays of up to 29.8 g/t Au, reinforcing the potential for the discovery of additional mineralization within the broader TZ district.
Next Steps
Exploration activities across Gurupi and TZ continue to advance according to plan. Follow-up drilling is underway at Blanket, Mandiocal and Grodiocal while an updated Gurupi MRE and PEA remain targeted for year-end 2026. At TZ, drilling continues below the current pit design and across regional targets within the recently defined mineralized corridor.
Year-to-date, the Corporation has completed approximately 33,600 m of the accelerated 65,000 m program at Gurupi, 14,500 m of the 25,000 m program at TZ. Exploration results from approximately 31,000 m drilled at GMIN's wholly owned Oko Project, Guyana, will be reported in a separate news release at a later date.
Sampling and Quality Assurance/Quality Control ("QA/QC") Disclosure
Gurupi assay samples are prepared at ALS Chemex in Parauapebas, Brazil, and Tocantinzinho assay samples are prepared at ALS Chemex in Cuiaba, Brazil. Samples from both projects are analyzed at an accredited laboratory in Lima, Peru, using fire assay and Inductively Coupled Plasma methods. Standard preparation includes crushing to 70% passing 2 mm and pulverizing 250 g to 85% passing 75 μm. Gold assays are performed using a 30 g fire assay with atomic absorption finish, with samples returning >10 g/t Au re-assayed by fire assay with gravimetric finish. When visible gold is present, a 1 kg split is pulverized to 95% passing 106 μm and subjected to screen fire assay for coarse gold evaluation. Duplicate analyses are also completed for added quality control. For a complete description of Gurupi's sample preparation, analytical methods and QA/QC procedures, refer to the technical report for the Gurupi Project dated April 8, 2025 (effective date February 3, 2025), entitled “Mineral Resource Estimate NI 43-101 Technical Report Gurupi Project”. For TZ, refer to the technical report dated April 8, 2025 (effective date February 3, 2025), entitled “Feasibility Study – NI 43-101 Technical Report, Tocantinzinho Gold Project”.
The Corporation maintains a rigorous QA/QC program, including the routine insertion of certified standards, blanks, and field duplicates (approximately 10% of all samples). QA/QC results are closely monitored, and any failures are re-assayed to ensure the reliability of reported results.
Qualified Person
The technical content of this press release has been reviewed and approved by Julie-Anaïs Debreil, Vice President Geology & Resources of GMIN, who is a Qualified Person as defined by National Instrument 43-101 Standards of Disclosure for Mineral Projects.
About G Mining Ventures Corp.
G Mining Ventures Corp. is a mining company engaged in the development, operation and exploration of precious metals projects. GMIN is well-positioned to grow into the next mid-tier precious metals producer by leveraging strong access to capital and proven development expertise. GMIN is currently anchored by the Tocantinzinho Mine in Brazil, supported by the Gurupi Project in Brazil and the Oko West Project and Oko-Ghanie Project in Guyana — all with significant exploration upside and located in mining-friendly jurisdictions. GMIN trades on the TSX under the symbol GMIN.
Additional Information
For further information on GMIN, please visit the website at www.gmin.gold or contact: Jean-François Lemonde Vice President, Investor Relations 514.299.4926 Jflemonde@gmin.gold
Appendix Table 6: Collar coordinates of the released holes
Hole ID
Target
Easting
Northing
Elevation
Dip
Azimut
System
GUD-26-019
Blanket
364799
9750372
46
-85
295
SIRGAS 2000 / UTM zone 23S
GUD-26-021
Blanket
364859
9750353
74
-85
295
SIRGAS 2000 / UTM zone 23S
GUD-26-023
Blanket
364773
9750289
47
-85
305
SIRGAS 2000 / UTM zone 23S
GUD-26-026
Blanket
364832
9750267
39
-85
305
SIRGAS 2000 / UTM zone 23S
GUD-26-029
Blanket
364741
9750241
51
-85
330
SIRGAS 2000 / UTM zone 23S
GUD-26-027
Mandiocal
354979
9749155
56
-60
50
SIRGAS 2000 / UTM zone 23S
GUD-26-028
Mandiocal
354962
9749125
56
-62
50
SIRGAS 2000 / UTM zone 23S
GUD-26-030
Mandiocal
355042
9749068
63
-66
50
SIRGAS 2000 / UTM zone 23S
GUD-26-031
Mandiocal
354954
9749224
55
-66
46
SIRGAS 2000 / UTM zone 23S
GUD-26-033
Mandiocal
355185
9748984
57
-75
50
SIRGAS 2000 / UTM zone 23S
GUD-26-034
Mandiocal
354964
9749261
62
-60
50
SIRGAS 2000 / UTM zone 23S
GUD-26-035
Mandiocal
355103
9748989
62
-50
50
SIRGAS 2000 / UTM zone 23S
GUD-26-007
Grodiocal
351869
9751634
49
-50
50
SIRGAS 2000 / UTM zone 23S
GUD-26-010
Grodiocal
351783
9751559
71
-50
50
SIRGAS 2000 / UTM zone 23S
GUD-26-017
Grodiocal
352551
9752207
54
-50
50
SIRGAS 2000 / UTM zone 23S
GUD-26-022
Grodiocal
352053
9751396
52
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-018
Grodiocal
350473
9753306
49
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-024
Grodiocal
352324
9751105
53
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-039
Grodiocal
353026
9750674
53
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-057
Grodiocal
352027
9751482
47
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-059
Grodiocal
352173
9751373
52
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-066
Grodiocal
352021
9751502
39
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-068
Grodiocal
351918
9751541
53
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-072
Grodiocal
351962
9751456
50
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-073
Grodiocal
351303
9752087
54
-50
50
SIRGAS 2000 / UTM zone 23S
GUR-26-076
Grodiocal
351380
9752155
55
-50
50
SIRGAS 2000 / UTM zone 23S
BRZ-25-121
TZ
578347
9330806
120
-61
218
SIRGAS 2000 / UTM zone 26S
BRZ-26-129
TZ
578410
9330897
155
-59
215
SIRGAS 2000 / UTM zone 26S
BRZ-26-132
TZ
578410
9330897
155
-56
206
SIRGAS 2000 / UTM zone 26S
BRZ-26-134
TZ
578320
9330830
120
-65
219
SIRGAS 2000 / UTM zone 26S
Cautionary Statement on Forward-Looking Information
All statements, other than statements of historical fact, contained in this press release constitute “forward-looking information” and “forward-looking statements” within the meaning of certain securities laws and are based on expectations and projections as of the date of this press release. While this press release focuses on results obtained from exploration activities at TZ and Gurupi, it also contains statements about exploration potential, additional exploration opportunities at TZ, multiple targets at Gurupi, continuity of mineralization at depth at TZ, GMIN’s overall exploration strategy, GMIN’s planned exploration works across its asset portfolio, and the milestones expected to be achieved at Gurupi by year end 2026 (e.g., updated MRE, PEA), all such statements being forward-looking in their essence and nature.
In particular, mineralized intervals reported in this press release are drill intercepts and may not represent true widths, except where noted. The potential quantity and grade of any exploration target or mineralized zone outside the current MRE is conceptual in nature, and there has been insufficient exploration to define a mineral resource in those areas.
Forward-looking statements contained in this press release include, without limitation, those related to (i) the completion of both an updated MRE and a PEA for Gurupi by the end of 2026, expected to strengthen GMIN’s pipeline of organic growth opportunities; (ii) the continuity of mineralization at depth at TZ (below current pit design), providing potential for mineral resource conversion or additions; (iii) the potential for further extensions of mineralization beyond the current MRE for Gurupi; (iv) Gurupi’s district-scale potential, also representing an important future growth platform; (v) the definition of a broader mineralized corridor hosting multiple targets at TZ; (vi) the strong exploration potential of the Blanket, Mandiocal and Grodiocal deposits at Gurupi, each of which remaining open for follow-up drilling; (vii) the advancement of a growing pipeline of regional targets across TZ’s broader district, to reinforce its potential for the discovery of additional mineralization and to support future resource evaluation and mine-planning opportunities; and (viii) in general, the sections entitled “Gurupi Demonstrates District-Scale Growth Potential” “Tocantinzinho Continues to Deliver Near-Mine and District-Scale Opportunities” and “About G Mining Ventures Corp.”; as well as the quoted comments of GMIN’s Vice President, Geology & Resources.
Forward-looking statements are based on expectations, estimates and projections as of the time of this press release. Forward-looking statements are necessarily based upon a number of estimates and assumptions that, while considered reasonable by the Corporation as of the time of such statements, are inherently subject to significant business, economic and competitive uncertainties and contingencies. These estimates and assumptions may prove to be incorrect. Such assumptions include, without limitation, those relating to the price of gold and currency exchange rates, those relating to mineral reserves and resources as well as exploration targets, and those underlying the items listed in the above sections entitled “Gurupi Demonstrates District-Scale Growth Potential” “Tocantinzinho Continues to Deliver Near-Mine and District-Scale Opportunities” and “About G Mining Ventures Corp.”.
Many of these uncertainties and contingencies can directly or indirectly affect, and could cause, actual results to differ materially from those expressed or implied in any forward-looking statements. There can be no assurance that, notably but without limitation, (i) the identified pipeline of near-mine and regional growth opportunities at TZ will lead to additional mineral reserves and, eventually, additional ounces of gold produced; (ii) the extension to Gurupi’s known mineralization (notably the near-surface discovery at Gurupi’s Grodiocal target) will lead to additional mineral resources; (iii) the validation of the exploration potential at both TZ and Gurupi will lead to highly prospective zones for further exploration and, eventually, to additional mineral resources at either or both sites; (iv) the improved geological understanding of TZ’s mineralized system will translate into additional mineral reserves and, eventually, additional ounces of gold produced; (v) Brazil’s regulatory environment will ensure timely decision-making allowing GMIN to achieve its planned Gurupi milestones; (vi) GMIN will achieve its stated exploration objectives for TZ and Gurupi; or (vii) GMIN will grow into the next mid-tier precious metals producer, as future events could differ materially from what is currently anticipated by the Corporation. In addition, there can be no assurance that Brazil and/or Guyana will remain mining friendly and prospective jurisdictions.
By their very nature, forward-looking statements involve inherent risks and uncertainties, both general and specific, and risks exist that estimates, forecasts, projections and other forward-looking statements will not be achieved or that assumptions do not reflect future experience. Forward-looking statements are provided for the purpose of providing information about management’s expectations and plans relating to the future. Readers are cautioned not to place undue reliance on these forward-looking statements as a number of important risk factors and future events could cause the actual outcomes to differ materially from the beliefs, plans, objectives, expectations, anticipations, estimates, assumptions and intentions expressed in such forward-looking statements. All of the forward-looking statements made in this press release are qualified by these cautionary statements and those made in the Corporation’s other filings with the securities regulators of Canada including, but not limited to, the cautionary statements made in the relevant sections of the Corporation’s (i) Annual Information Form dated March 25, 2026, for the financial year ended December 31, 2025, and (ii) Management Discussion & Analysis. The Corporation cautions that the foregoing list of factors that may affect future results is not exhaustive, and new, unforeseeable risks may arise from time to time. The Corporation disclaims any intention or obligation to update or revise any forward-looking statements or to explain any material difference between subsequent actual events and such forward-looking statements, except to the extent required by applicable law.
