Minaurum Extends High-Grade Quintera Vein at Depth with 5.95 m of 1,117 g/t Silver Equivalent; Europa Sur Returns 3.65 m of 888 g/t AgEq

(Moderate)

(Positive)

Rhea-AI Summary

Minaurum Silver (OTCQX: MMRGF) reported new Phase II drill results from the Alamos silver project in Sonora, Mexico.

Highlights include 5.95 m of 1,117 g/t AgEq at Quintera, 3.65 m of 888 g/t AgEq at Europa Sur, and 8.5 m of 111 g/t AgEq at San Jose.

The Europa vein hosts an inferred resource of 26.5 Moz AgEq within a combined Europa-Promontorio-Travesia inferred resource of 55.2 Moz AgEq. Minaurum indicates these results support ongoing resource-expansion targeting multiple high-grade, stacked veins.

Positive

Quintera extension: 5.95 m of 1,117 g/t AgEq, including 2.40 m of 2,557 g/t AgEq (AL26-215)
Very high-grade shoots: up to 7,950 g/t AgEq over 0.45 m within Quintera
Europa Sur high grades: 4.75 m of 888 g/t AgEq, including 2.65 m of 1,053 g/t AgEq (AL26-207)
Exceptional Cu-rich interval: 0.30 m of 1,699 g/t AgEq with 12.55% Cu at Europa Sur (AL26-209)
Existing inferred resource: Europa 26.5 Moz AgEq within 55.2 Moz AgEq combined (Europa-Promontorio-Travesia)
San Jose width: 8.5 m of 111 g/t AgEq, supporting broader mineralized envelope (AL26-200)

Negative

None.

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07/08/2026 - 08:45 AM

Vancouver, British Columbia--(Newsfile Corp. - July 8, 2026) - Minaurum Silver Inc. (TSXV: MGG) (OTCQX: MMRGF) ("Minaurum" or the "Company") is pleased to report continued high-grade and wide-vein drill results from the Europa, Quintera, Travesia, and San Jose Vein Zones, as part of its ongoing Phase II, 50,000-metre resource-expansion program at the Alamos Silver Project ("Alamos") in Sonora, Mexico.

Highlights include: (Drilled Thickness)

Quintera Vein Zone

5.95 m of 1,117 g/t silver equivalent ("AgEq")
(953 g/t Ag, 0.04 g/t Au, 1.21% Cu, 1.58% Pb, 0.41% Zn),
including 2.40 m of 2,557 g/t AgEq
(2,204 g/t Ag, 0.10 g/t Au, 2.83% Cu, 3.83% Pb, 0.98% Zn) (Hole AL26-215)

Europa Sur Vein Zone

3.65 m of 888 g/t AgEq
(713 g/t Ag, 0.33 g/t Au, 1.03% Cu, 1.52% Pb, 2.64% Zn)
including 2.65 m of 1,053 g/t AgEq
(841 g/t Ag, 0.44 g/t Au, 1.23% Cu, 1.98% Pb, 3.43% Zn) (Hole AL26-207)
1.15 m of 459 g/t AgEq
(419 g/t Ag, 0.18% Cu, 0.08% Zn) (Hole AL26-207)
0.30 m of 1699 g/t AgEq
(601 g/t Ag, 12.55% Cu) (Hole AL26-209)

"Historically, Quintera was the highest-grade and most productive vein at Alamos. Our drilling now demonstrates that this underexplored zone extends both to depth and along strike beyond the historical workings," stated Darrell Rader, President and CEO of Minaurum Silver. "These latest results include multiple robust high-grade silver intercepts that underscore Quintera's potential to become a major contributor to future resource growth at Alamos."

"At Europa, and particularly within the Europa Sur extension, drilling continues to return high-grade silver mineralization in hanging-wall veins as well as in the main Europa Sur vein. These results continue to validate our exploration model of multiple stacked, high-grade veins at Europa."

Figure 1. Plan view showing locations of Travesia, Quintera, Promontorio, Europa and San Jose vein zones. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/304302_8a93f33bd487fb2b_003full.jpg

Quintera - Travesia Vein Zones
The historic Quintera mine produced an estimated 100 million ounces of silver with development reaching 16 levels to a depth of 500 m along a southwest-plunging shoot. Hole AL26-215 targeted the down-plunge projection of the Quintera vein zone, extending mineralization about 100 m below the significant high-grade results of 5.95 m of 1,117 g/t AgEq, below holes AL26-180 (5.30 m of 633 g/t AgEq: 570 g/t Ag, 0.01 g/t Au, 0.62% Cu, 0.16% Pb, 0.21% Zn) and AL26-188 (5.80 m of 658 g/t AgEq: 581 g/t Ag, 0.06 g/t Ag, 0.33% Cu, 0.87 g/t Pb, 1.08 g/t Zn) (see news release dated March 31, 2026). Assays are pending for hole AL26-206, which was drilled in the northern part of the Quintera vein zone.

Mineralization was intersected at the Travesia vein returning 4.25 m of 133 g/t AgEq (96 g/t Ag, 0.12% Cu, 0.10% Pb, 0.22% Zn) (AL26-202) and 1.20 m of 227 g/t AgEq (143 g/t Ag, 0.10 g/t Au, 0.52% Cu, 0.26% Pb, 0.42% Zn) (AL26-205). See Table 1, Figures 2 - 4.

Further drilling of the Quintera and Travesia zones will include continually targeting down-plunge projections of the southwest-plunging shoots.

Table 1. Assay Highlights for Quintera and Travesia Vein Zones. True widths are based on current interpretation of mineralized structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on: October 1, 2025 Long-term CIBC Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb, Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for Pb, 75% for Zn.

QUINTERA

Hole	From (m)	To (m)	Interval (m)	True Width (m)	Ag g/t	Au g/t	Cu %	Pb %	Zn %	AgEq g/t
AL26-206	Assays pending
AL26-215	232.15	233.10	0.95	0.60	79	0.05	0.20	0.07	0.18	127
	441.40	449.75	5.95	3.90	953	0.04	1.21	1.58	0.41	1117
	including
	441.40	441.70	0.30	0.20	955	0.01	0.99	0.42	0.03	1074
	and
	444.95	447.35	2.40	1.50	2204	0.10	2.83	3.83	0.98	2557
	which includes
	444.95	445.25	0.30	0.20	7000	0.33	5.64	4.46	0.12	7626
	and
	445.90	446.35	0.45	0.30	6780	0.23	9.41	15.80	4.25	7950
	448.8	449.75	0.95	0.62	98	0.00	0.66	0.02	0.02	180
	465.60	466.10	0.50	0.35	193	0.02	0.14	0.01	0.03	210
	479.15	479.55	0.40	0.25	2710	0.05	0.35	0.40	0.33	2777

TRAVESIA

Hole	From (m)	To (m)	Interval (m)	True Width (m)	Ag g/t	Au g/t	Cu %	Pb %	Zn %	AgEq g/t
AL26-202	79.05	83.30	4.25	2.55	96	0.00	0.12	0.10	0.22	133
AL26-205	241.90	242.50	1.20	1.00	143	0.10	0.52	0.26	0.42	227
	including
	242.50	243.10	0.60	0.50	204	0.19	0.83	0.23	0.78	322

Figure 2. Longitudinal section of Travesia-Promontorio vein zones, showing locations of highlighted mineralized intersections. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/304302_8a93f33bd487fb2b_004full.jpg

Figure 3. Longitudinal section of Quintera vein zone, showing reported historic mine workings. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/304302_8a93f33bd487fb2b_005full.jpg

Figure 4. Cross section of Quintera vein zone, showing relationship of holes AL26-215, -188, -180.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/304302_8a93f33bd487fb2b_006full.jpg

Europa Vein Zone
The Europa vein inferred resource constitutes 26.5 Moz AgEq of the total (Europa + Promontorio + Travesia) resource of 55.2 Moz AgEq (34.8 Moz Ag, 35.6 Koz Au, 50.99 Mlbs Cu, 114.77 Mlbs Pb, and 237.80 Mlbs Zn) (see news release dated January 28, 2026). It does not include its southern extension Europa Sur.

Ongoing along-strike and down-dip drilling at Europa Sur continues to expand the zone, returning high-grade silver, gold, copper, and base metals results (Table 2; Figures 5 and 6). Hole AL26-207returned 4.75 m of 888 g/t AgEq (563 g/t Ag, 0.25 g/t Au, 0.80% Cu, 1.17% Pb, 2.04% Zn). Hole AL26-209 cut 0.30 m of 1,699 g/t AgEq (601 g/t Ag, 12.55% Cu).

These results bolster prior Minaurum high-grade intercepts including a wide intercept of 12.35 m of 408 g/t AgEq (318 g/t Ag, 0.09 g/t Au, 0.35% Cu, 1.60% Pb, 0.90% Zn) (AL25-163), and 0.60 m of 828 g/t AgEq (701 g/t Ag, 0.07 g/t Au, 0.34% Cu, 0.52% Pb, 3.39% Zn) (AL26-186), and 3.20 m of 882 g/t AgEq (453 g/t Ag, 1.19 g/t Au, 2.88% Cu, 1.49% Zn, 1.98% Pb) (AL26-196) (see news releases dated February 10, and March 31, and May 27, 2026).

Results to date continue to confirm the potential for significant resource expansion outside of the central Europa vein zone in the Europa Sur extension.

Figure 5. Longitudinal section of Europa-Europa Sur vein zone, showing locations of highlighted mineralized intersections. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/304302_304302figurefive.jpg

Figure 6. Cross section of Europa-Europa Sur vein zone, showing locations of highlighted mineralized intersections. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/304302_8a93f33bd487fb2b_008full.jpg

Table 2. Assay Highlights for Europa Sur Vein Zone. True widths are based on current interpretation of mineralized structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on: October 1, 2025 Long-term CIBC Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb, Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for Pb, 75% for Zn.

Hole	From (m)	To (m)	Interval (m)	True Width (m)	Ag g/t	Au g/t	Cu %	Pb %	Zn %	AgEq g/t
AL26-201	99.55	101.35	1.80	1.70	200	0.08	0.06	0.60	0.28	249
	156.00	156.35	0.35	0.33	70	0.05	0.28	0.08	0.36	126
	333.10	333.40	0.30	0.29	96	0.01	0.13	0.10	0.34	135
	334.60	334.90	0.30	0.29	583	0.02	0.55	0.06	0.23	657
AL26-203	180.00	180.55	0.55	0.54	76	0.02	0.12	0.14	0.39	116
	235.55	236.60	1.05	1.30	64	0.03	0.11	0.45	1.20	111
	238.80	239.15	0.35	0.34	230	0.03	0.10	0.47	1.36	277
	310.95	311.40	0.45	0.44	219	0.22	0.22	0.34	0.94	289
	339.20	339.55	0.35	0.34	67	0.05	0.15	0.51	1.29	120
	376.35	377.60	1.25	1.23	121	0.03	0.40	0.18	0.72	186
	379.20	379.55	0.35	0.34	63	0.00	0.25	0.67	1.89	125
	387.55	388.20	0.65	0.64	80	0.02	0.09	0.21	0.27	119
AL26-207	189.70	194.45	4.75	2.75	563	0.25	0.80	1.17	2.04	888
	including
	191.30	193.95	2.65	2.25	841	0.44	1.23	1.98	3.43	1053
	196.90	197.45	0.55	0.47	95	0.00	0.09	0.13	0.21	130
	243.30	243.60	0.30	0.26	276	0.05	0.55	0.77	1.32	369
	258.00	259.15	1.15	0.98	419	0.00	0.18	0.00	0.08	459
AL26-208	79.30	80.85	1.55	1.52	71	0.01	0.29	1.16	2.45	147
	438.25	439.75	1.50	1.47	116	0.25	0.57	0.43	1.16	222
	including
	438.25	438.65	0.40	0.39	311	0.44	0.81	0.30	1.12	451
AL26-209	93.40	93.70	0.30	1.76	601	0.00	12.55	0.00	0.00	1699
AL26-212	147.75	148.35	0.60	0.74	42.4	0.01	0.14	0.24	0.99	86
AL26-213	75.60	77.40	1.80	0.74	66	0.08	0.35	0.45	1.03	138
	337.30	337.65	0.35	0.34	422	0.05	1.47	0.56	0.92	588
	378.20	378.95	0.75	1.70	121	0.03	0.61	0.37	0.54	208
AL26-214	99.15	99.50	0.35	0.33	3.6	0.65	0.00	0.67	1.51	101

San Jose Vein Zone
Drilling intersected mineralization across a wide width of 8.5 m in Hole AL26-200 returning 111 g/t AgEq (80 g/t Ag, 0.05% Cu, 0.08% Pb, 0.21% Zn) including 1.55 m of 128 g/t AgEq (100 g/t Ag, 0.03% Cu, 0.04% Pb, 0.09% Zn) (Table 3). Results confirm initial Minaurum drilling which also intersected a wide width including 9.6 m of 269 g/t AgEq (198 g/t Ag, 0.02 g/t Au, 0.16% Cu, 0.22% Pb, 0.87% Zn) and 2.05 m of 383 g/t AgEq (181 g/t Ag, 0.06 g/t Au, 0.14% Cu, 1.63 Pb, 1.15% Zn) (AL18-015); 4.05 m of 289 g/t Ag (289 g/t Ag, 0.03 g/t Au, 0.38% Cu, 0.34% Pb, 0.43% Zn) (AL21-92A); and 0.20 m of 764 g/t AgEq (723 g/t Ag, 0.01 g/t Au, 0.24% Cu, 0.08% Pb, 0.70% Zn) (AL26-195) (see new releases dated March 1, 2019, March 1, 2022, and May 27, 2026).

Further drilling at San Jose will continue to define the resource potential along strike while refining our geological understanding of this important vein zone.

Table 3. Assay Highlights for San José Vein Zone. True widths are based on current interpretation of mineralized structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on: October 1, 2025 Long-term CIBC Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb, Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for Pb, 75% for Zn.

Hole	From (m)	To (m)	Interval (m)	True Width (m)	Ag g/t	Au g/t	Cu %	Pb %	Zn %	AgEq g/t
AL26-200	267.1	275.6	8.5	7.2	80	0.00	0.05	0.08	0.21	111
	including
	267.70	268.40	0.70	0.58	86	0.03	0.12	0.11	0.96	127
	271.65	273.20	1.55	1.32	100	0.00	0.03	0.04	0.09	128
AL26-204	396.05	397.95	1.90	1.75	76.6	0.01	0.02	0.05	0.20	105
AL26-211	182.70	183.55	0.85	0.80	57.7	0.04	0.08	0.06	0.36	94

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Minaurum Silver Inc. (TSXV: MGG) (OTCQX: MMRGF) (FSE: 78M0) is an Americas-focused explorer concentrating on the high-grade 100% owned, production-permitted Alamos silver project in southern Sonora, Mexico and the Lone Mountain CRD Project in Nevada, USA. Minaurum is managed by one of the strongest technical and finance teams and will continue its founders' legacy of creating shareholder value by acquiring and developing a pipeline of Tier-One precious-and base metal projects.

ON BEHALF OF THE BOARD

"Darrell A. Rader"

Darrell A. Rader
President and CEO

For more information, please contact:
Sunny Pannu – Investor Relations and Corporate Development Manager
(778) 330 0994 or via email at pannu@minaurum.com

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this news release.

___________________________________________________________________________

1570– 200 Burrard Street	Telephone: 1 778 330-0994
Vancouver, BC V6C 3L6	www.minaurum.com
	info@minaurum.com

Data review and verification: Stephen R. Maynard, Vice President of Exploration of Minaurum and a Qualified Person (QP) as defined by National Instrument 43-101, reviewed and verified the assay data, and has approved the disclosure in this news release. Verification was done by visual inspection of core samples and comparison to assay results. Assay results have not been checked by re-analysis. No factors were identified that could materially affect the accuracy or reliability of the data presented in this news release.

Analytical Procedures and Quality Assurance/Quality Control: Preparation and assaying of drilling samples from Minaurum's Alamos project are done with strict adherence to a Quality Assurance/Quality Control (QA/QC) protocol. Core samples are sawed in half and then bagged in a secure facility near the site and then shipped either by a licensed courior by Company personnel to ALS Minerals' preparation facility in Hermosillo, Sonora, Mexico. ALS prepares the samples, crushing them to 70% less than 2mm, splitting off 250g, and pulverizing the split to more than 85% passing 75 microns. The resulting sample pulps are prepared in Hermosillo and then shipped to Vancouver for chemical analysis by ALS Minerals. In Vancouver, the pulps are analyzed for gold by fire assay and ICP/AES on a 30-gram charge. In addition, analyses are done for silver, copper, lead, and zinc using 4-acid digestion and ICP analysis. Samples with silver values greater than 100 g/t; and copper, lead, or zinc values greater than 10,000 ppm (1%) are re-analyzed using 4-acid digestion and atomic absorption spectrometry (AAS).

Quality-control (QC) samples are inserted in the sample stream every 20 samples on average, and thus represent 5% of the total samples. QC samples include standards, blanks, and duplicate samples. Standards are pulps that have been prepared by a third-party laboratory; they have gold, silver, and base-metal values that are established by an extensive analytical process in which several commercial labs (including ALS Minerals) participate. Standards test the calibration of the analytical equipment. Blanks are rock material known from prior sampling to contain less than 0.005 ppm gold; they test the sample preparation procedure for cross-sample contamination. In the case of duplicates, the sample interval is cut in half and then quartered. The first quarter is the original sample, the second becomes the duplicate. Duplicate samples provide a test of the reproducibility of assays in the same drilled interval. When final assays are received, QC sample results are inspected for deviation from accepted values. To date, QC sample analytical results have fallen in acceptable ranges on the Alamos project.

When final assays are received, QC sample results are inspected for deviation from accepted values by the QP. To date, QC sample analytical results have fallen in acceptable ranges on the Alamos project.

ALS Minerals is independent of Minaurum Silver and is independent of the Qualified Person.

Cautionary Note Regarding Forward-Looking Information: This news release contains "forward-looking information" within the meaning of applicable Canadian securities legislation. "Forward-looking information" includes, but is not limited to, statements with respect to the activities, events or developments that the Company expects or anticipates will or may occur in the future, including the Resource Estimate; the ongoing Phase II 50,000 m resource expansion drill program; and the completion of an updated resource estimate in the second half of 2026. Generally, but not always, forward-looking information and statements can be identified by the use of words such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", or "believes" or the negative connotation thereof or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof.

In making the forward-looking information in this release, Minaurum has applied certain factors and assumptions that are based on Minaurum's current beliefs as well as assumptions made by and information currently available to Minaurum, including that Minaurum will be able to obtain all necessary permits and approvals for planned exploration and drilling activities; that Minaurum's planned drilling and exploration activities will be completed on the expected timeline, or at all; that the results of the drilling and exploration activities will be as expected; that Minaurum will be able to complete the updated mineral resource estimate on the timelines expected, or at all; and that Minaurum will have the financial resources to complete its ongoing drill program and anticipated updated mineral resource estimate. Although Minaurum considers these assumptions to be reasonable based on information currently available to it, they may prove to be incorrect, and the forward-looking information in this release are subject to numerous risks, uncertainties and other factors that may cause future results to differ materially from those expressed or implied in such forward-looking information.

In making the forward-looking information in this release, Minaurum has applied certain factors and assumptions that are based on Minaurum's current beliefs as well as assumptions made by and information currently available to Minaurum. Although Minaurum considers these assumptions to be reasonable based on information currently available to it, they may prove to be incorrect, and the forward-looking information in this release are subject to numerous risks, uncertainties and other factors that may cause future results to differ materially from those expressed or implied in such forward-looking information, including risks relating to the actual results of drilling or exploration activities, fluctuating silver prices, possibility of equipment breakdowns and delays, drilling or exploration cost overruns, availability of capital and financing, general economic, market or business conditions, regulatory changes and timeliness of government or regulatory approvals.

Readers are cautioned not to place undue reliance on forward-looking information. Minaurum does not intend, and expressly disclaims any intention or obligation to, update or revise any forward-looking information whether as a result of new information, future events or otherwise, except as required by law.

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FAQ

What drilling results did Minaurum Silver (MMRGF) announce on July 8, 2026 at the Alamos project?

Minaurum Silver reported multiple high-grade intercepts at Alamos, led by Quintera and Europa Sur. According to Minaurum, Quintera returned 5.95 m of 1,117 g/t AgEq, while Europa Sur delivered 3.65 m of 888 g/t AgEq and several narrower, very high-grade intervals.

What is the significance of the 5.95 m of 1,117 g/t silver equivalent at Quintera for MMRGF investors?

The 5.95 m of 1,117 g/t AgEq at Quintera extends high-grade mineralization about 100 m below prior hits. According to Minaurum, this down-plunge extension in Hole AL26-215 supports Quintera’s potential to contribute materially to future resource growth at the Alamos project.

How do the Europa Sur drill results impact the Europa resource at Minaurum Silver’s Alamos project?

Europa Sur lies south of the current Europa inferred resource and is not yet included in it. According to Minaurum, new intercepts up to 4.75 m of 888 g/t AgEq confirm high-grade mineralization that may support resource expansion beyond the 26.5 Moz AgEq already defined at Europa.

What is the current inferred resource at the Europa, Promontorio, and Travesia zones for Minaurum Silver (MMRGF)?

The combined inferred resource at Europa, Promontorio, and Travesia totals 55.2 Moz AgEq. According to Minaurum, this includes 34.8 Moz Ag, 35.6 Koz Au, 50.99 Mlbs Cu, 114.77 Mlbs Pb, and 237.80 Mlbs Zn, with Europa alone hosting 26.5 Moz AgEq.

What did Minaurum Silver report from the San Jose vein zone in the July 8, 2026 update?

Minaurum intersected 8.5 m of 111 g/t AgEq at San Jose in Hole AL26-200. According to Minaurum, this wide interval, plus earlier holes up to 9.6 m of 269 g/t AgEq, supports ongoing drilling to refine resource potential along strike in this vein zone.

How large is Minaurum Silver’s Phase II drill program at the Alamos project and what is its goal?

The Phase II drill program at Alamos totals 50,000 metres and focuses on resource expansion. According to Minaurum, current drilling at Europa, Quintera, Travesia, and San Jose targets down-plunge and along-strike extensions of high-grade veins to grow the existing silver-equivalent resource base.