Minaurum Silver Inc. press release

Minaurum Completes 50,000-Metre Resource-Expansion Drill Program at the Alamos Silver Project, Drills More High-Grade Silver: 751 g/t AgEq over 2.80 m at Africa, 385 g/t AgEq over 5.30 m at Quintera, and 238 g/t AgEq over 12.20 m at Promontorio Sur

2026-11-05

TSXV - TSX Venture Exchange · Gold · Silver · Copper · Lead · Zinc · Canada · Drill Results

Vancouver, British Columbia--(Newsfile Corp. - November 5, 2026) - Minaurum Silver Inc. (TSXV: MGG) (OTCQX: MMRGF)("Minaurum" or the "Company") is pleased to announce the completion of its 50,000-metre Phase II resource expansion drill programat the Alamos Silver Project("Alamos") in Sonora, Mexico. The last holes of the drill program returned additional high-grade silver resultsfrom the Europa, San Jose, Promontorio Sur, and the newly discovered Africa vein zone, as well ashigh-grade gold at Quintera.Results will be incorporated into the Company's updated Phase II mineral resource estimate targeted for release this quarter.

Highlights include:

Africa Vein Zone

2.80 m of 751 g/t silver equivalent "AgEq" _(302 g/t Ag, 0.64 g/t Au, 1.50% Cu, 5.09% Pb, 6.83% Zn) _including 0.50 m of 1,579 g/t AgEq (354 g/t Ag, 1.90 g/t Au, 2.85% Cu, 20.00% Pb, 17.40% Zn)(Hole AL26-274)

Quintera Vein Zone

5.30 m of 385 g/t AgEq _(316 g/t Ag, 0.16 g/t Au, 0.47% Cu, 0.31% Pb, 0.35% Zn) _including 0.70 m of 1,757 g/t AgEq (1,450 g/t Ag, 1.00 g/t Au, 2.01% Cu, 1.24% Pb, 0.89% Zn) (Hole AL26-279) 4.40 m of 439 g/t AgEq - High-Grade Gold Interval _(32 g/t Ag, 4.50 g/t Au, 0.20% Pb) _including 0.50 m of 1,229 g/t AgEq (0.50 m of 188 g/t Ag, 11.45 g/t Au, 0.92% Pb) (Hole AL26-206)

Europa Sur Vein Zone

0.50 m of 1,049 g/t AgEq (895 g/t Ag, 0.04 g/t Au,1.52% Cu, 0.28% Pb, 0.62% Zn) (Hole AL26-277)

Promontorio Sur Vein Zone

12.20 m of 238 g/t AgEq _(14 g/t Ag, 0.02 g/t Au, 0.01% Cu,2.08% Pb, 7.61% Zn) _including 5.45 m of 336 g/t AgEq (21 g/t Ag, 0.02 g/t Au, 0.01% Cu, 2.58% Pb, 10.99% Zn) (Hole AL26-272)

"These latest results complete our 50,000-metre Phase II resource-expansion drill program and set the stage for our upcoming resource update," stated Darrell Rader, President and CEO of Minaurum Silver."At the newly discovered Africa vein, hole AL26-274 confirms impressive widths of high-grade silver mineralization. The Europa and Promontorio zones remain open along strike and at depth. Quintera continues to deliver strong high-grade silver results, accompanied by a significant pulse of gold mineralization. Overall, the Phase II resource-expansion program has been a significant success, highlighting compelling opportunities to further expand the Alamos resource. We look forward to delivering our updated Phase II resource estimate this quarter, marking another milestone in advancing the Alamos Silver Project."

Phase II Resource-Expansion Drill Program Completion In January 2026, Minaurum announced an initial inferred resource estimate of 55.2 million ounces "Moz" AgEq,or 34.8 Moz of silver, 35,640 ounces of gold, 51.0 million pounds("Mlb") of copper, 115 Mlb of lead, and 238 Mlb of zinc. The resource's average grades were320 g/t AgEq,or 202 g/t silver, 0.21 g/t gold, 0.43% copper, 0.97% lead, and 2.01% zinc, using a cutoff grade of 150 g/t AgEq, contained within 5.37 million tonnes (see news release dated January 28, 2026). The initial resource is defined in just 3 of the 26 vein zones identified at Alamos: Promontorio, the central part of Europa, and Travesia (Figure 1).

The objective of Phase II was to expand the resource by stepping out at roughly 80-m intervals along strike and down dip from the previously identified resources at Europa, Promontorio, and Travesia; and from previous vein intercepts in the Europa Sur, Quintera, Promontorio Sur, and San Jose vein zones. Phase II consisted of 50,356.15 metres in 138 holes (Tables 1 and 2).

Table 1. Minaurum Silver Alamos Project - Summary of Core Drilling.

| Years | Phase | Number of Holes | Meters | Hole Number | | 2017-2019 | Exploration Phase I | 40 | 16,043.50 | AL17-001 - AL19-040 | | 2020-2021 | Exploration Phase II | 63 | 23,503.20 | AL20-041 - AL21-099 | | 2022 | Service Holes | 5 | 560.30 | AL22-100 - AL22-104 | | 2024-2025 | Resource Phase I | 45 | 13,707.60 | AL24-105 - AL25-149 | | 2025-2026 | Resource Phase II | 138 | 50,356.15 | AL25-150 - AL26-284 | | | | 291 | 104,170.75 | |

Table 2. Resource Phase II drilling targets by vein zone. Europa includes Europa Sur, Europa Norte, and Africa. Promontorio includes Promontorio Sur.

| Vein Zone | Number of Holes | Meters | | Europa | 83 | 30,687.70 | | Quintera/Travesia | 29 | 11,484.15 | | Promontorio | 9 | 2,664.10 | | San Jose | 17 | 5,520.20 | | | 138 | 50,356.15 |

[](https://images.newsfilecorp.com/files/3455/321940_figure%201.jpg)

Figure 1. Plan view showing locations of 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/3455/321940_figure%201.jpg

Africa Vein The recently discovered Africa vein lies approximately 50 m into the footwall of the Europa Sur vein zone and has been tested by extending Europa Sur-targeted holes. Hole AL26-274 cut 2.80 m of 751 g/t AgEq (302 g/t Ag, 0.64 g/t Au, 1.50% Cu, 5.09% Pb, 6.83% Zn), about 150 m south of the intersection reported in hole AL26-268(2.05 m of 669 g/t AgEq(270 g/t Ag, 0.87 g/t Au, 1.55% Cu, 2.80% Pb, 5.62% Zn) (Figures 1 and 2; Table 3; see news release dated October 22, 2026)

[](https://images.newsfilecorp.com/files/3455/321940_figure%202.jpg)

Figure 2. Longitudinal section of Africa vein zone, showing intersections. Click to enlarge.

To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/3455/321940_figure%202.jpg

Table 3. Assay highlights for Africa vein_. _True widths are based on current interpretation of mineralized structures._Weight-averaged silver-equivalent grades (AgEq g/t) are based on the 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 | | AL26-270 | 464.55 | 465.10 | 0.55 | 0.45 | 24 | 0.03 | 0.01 | 0.96 | 2.31 | 101 | | AL26-274 | 199.75 | 202.55 | 2.80 | 2.65 | 302 | 0.64 | 1.50 | 5.09 | 6.83 | 751 | | including | | | | | | | | | | | | 200.35 | 200.85 | 0.50 | 0.50 | 354 | 1.90 | 2.85 | 20.00 | 17.40 | 1579 | | | and | | | | | | | | | | | | 201.85 | 202.55 | 0.70 | 0.65 | 458 | 0.48 | 2.96 | 4.37 | 9.28 | 1061 | | | AL26-280 | 170.70 | 171.60 | 0.90 | 0.75 | 1 | 0.00 | 0.00 | 0.06 | 0.17 | 6 | | AL26-282 | 152.55 | 153.20 | 0.65 | 0.55 | 4 | 0.00 | 0.01 | 0.02 | 0.02 | 6 |

Quintera - Travesia Vein Zones Gold Mineralization in the Quintera Footwall Hole AL26-206 intersected a gold-rich intervalassociated with quartz-pyrite veinlets roughly 35 m into the footwall of the Quintera vein, returning 4.40 metres grading 4.50 g/t Au and 32 g/t Ag (439 g/t AgEq), including 0.50 metre of 11.45 g/t Au and 188 g/t Ag (1,229 g/t AgEq) (Table 4). Additional drilling is planned to test the lateral and vertical continuity of this newly identified gold-bearing zone.

[](https://images.newsfilecorp.com/files/3455/321940_figure%203.jpg)

Figure 3. Cross section of Travesia and Quintera vein zones, showing relationship of holes AL26-279 and AL26-283 to historical workings and previously reported holes. Click to enlarge.

To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/3455/321940_figure%203.jpg

Hole AL26-279 returned1.70 m of 288 g/t AgEq (230 g/t Ag, 0.05 g/t Au, 0.39% Cu, 0.81% Pb, 0.17% Zn) in a vein in the hanging wall of the main Quintera vein zone, and5.30 m of 385 g/t AgEq (316 g/t Ag, 0.16 g/t Au, 0.47% Cu, 0.31% Pb, 0.35% Zn) including0.70 m of 1,757 g/t AgEq (1,450 g/t Ag, 1.00 g/t Au, 2.01% Cu, 1.24% Pb, 0.89% Zn) in the main Quintera zone (Table 4, Figure 3). AL26-279 intersected the Quintera vein approximately 30 m below and to the south of AL26-188's intersection which cut 5.80 m of 669 g/t AgEq(581 g/t Ag)and 90 m above the AL26-215 intersection which cut5.95 m of 1,117 g/t AgEq (953 g/t Ag)including2.40 m of 2,557 g/t AgEq: (2,204 g/t Ag)(see news releases dated March 31 and July 8, 2026).

Table 4. Assay highlights for Quintera vein_. _True widths are based on current interpretation of mineralized structures._Weight-averaged silver-equivalent grades (AgEq g/t) are based on the 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 | | AL26-206 | 119.80 | 121.15 | 1.35 | 1.05 | 126 | 0.03 | 0.45 | 0.08 | 0.21 | 173 | | 330.00 | 334.40 | 4.40 | 3.55 | 32 | 4.50 | 0.00 | 0.20 | 0.05 | 439 | | | including | | | | | | | | | | | | 332.00 | 332.50 | 0.50 | 0.40 | 188 | 11.45 | 0.00 | 0.92 | 0.05 | 1229 | | | AL26-273 | 74.30 | 74.90 | 0.60 | 0.45 | 28.9 | 0.06 | 0.18 | 1.02 | 3.4 | 151 | | 212.20 | 213.00 | 0.80 | 0.60 | 81.2 | 0.03 | 0.31 | 0.1 | 0.23 | 118 | | | AL26-279 | 197.20 | 198.90 | 1.70 | 1.30 | 230 | 0.05 | 0.39 | 0.81 | 0.17 | 288 | | including | | | | | | | | | | | | 198.00 | 198.90 | 0.90 | 0.70 | 377 | 0.08 | 0.55 | 1.31 | 0.24 | 463 | | | 363.25 | 368.55 | 5.30 | 4.00 | 316 | 0.16 | 0.47 | 0.31 | 0.35 | 385 | | | including | | | | | | | | | | | | 366.30 | 368.55 | 2.25 | 1.70 | 636 | 0.34 | 0.94 | 0.54 | 0.55 | 771 | | | which includes | | | | | | | | | | | | 366.95 | 367.65 | 0.70 | 0.55 | 1450 | 1.00 | 2.01 | 1.24 | 0.89 | 1757 | | | AL26-283 | 72.85 | 73.35 | 0.50 | 0.48 | 267 | 0.00 | 0.12 | 0.94 | 0.41 | 306 | | 145.00 | 145.60 | 0.60 | 0.57 | 307 | 0.05 | 0.64 | 0.95 | 0.77 | 404 | | | 183.10 | 183.65 | 0.55 | 0.52 | 157 | 0.00 | 0.13 | 0.03 | 0.14 | 172 | |

Europa - Europa Sur Vein Zones Hole AL26-277 cut0.50 m of 1,049 g/t AgEq(895 g/t Ag, 0.04 g/t Au, 1.52% Cu, 0.28% Pb, 0.62% Zn) in the northern part of the Europa Sur zone in hanging-wall veins of the Europa Sur zone with mineralization intersected in the remaining holes (Table 5, Figures 4 & 5).

[](https://images.newsfilecorp.com/files/3455/321940_figure%204.jpg)

Figure 4. 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/3455/321940_figure%204.jpg

[](https://images.newsfilecorp.com/files/3455/321940_figure%205.jpg)

Figure 5. Cross section ofEuropa-Europa Sur vein zone, showing relationship of Europa Sur and Africa mineralized intervals in hole AL26-274. Click to enlarge

To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/3455/321940_figure%205.jpg

Table 5. 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 theOctober 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 | | AL26-271 | 16.25 | 16.75 | 0.50 | 0.40 | 69.9 | 0.04 | 0.14 | 0.19 | 0.94 | 112 | | AL26-274 | 113.85 | 115.85 | 2.00 | 1.90 | 53 | 0.03 | 0.45 | 0.19 | 0.65 | 113 | | including | | | | | | | | | | | | 115.35 | 115.85 | 0.50 | 0.50 | 98 | 0.04 | 0.67 | 0.15 | 0.45 | 173 | | | 122.20 | 122.80 | 0.60 | 0.55 | 21 | 0.49 | 0.32 | 1.06 | 2.17 | 165 | | | AL26-275 | 88.60 | 89.55 | 0.95 | 0.80 | 10 | 0.01 | 0.03 | 0.13 | 0.38 | 25 | | AL26-277 | 138.00 | 138.50 | 0.50 | 0.45 | 895 | 0.04 | 1.52 | 0.28 | 0.62 | 1049 | | AL26-280 | 135.40 | 136.10 | 0.70 | 0.60 | 60.8 | 0.03 | 0.08 | 0.26 | 0.6 | 90 | | AL26-282 | 32.80 | 34.85 | 2.05 | 1.75 | 66 | 0.02 | 0.17 | 0.02 | 0.06 | 84 | | including | | | | | | | | | | | | 33.30 | 34.10 | 0.80 | 0.70 | 98 | 0.02 | 0.28 | 0.03 | 0.07 | 126 | |

Promontorio Sur Vein Zone Drilling at Promontorio Sur reported strong base-metal mineralizationwith silver credits. Promontorio Sur continues to demonstrate carbonate-replacement ("CRD")/skarn mineralization potential as first identified in April 2024 (see news release dated April 25, 2024). Hole AL26-272cut 2.10 m of 6.24% Pb+Zn (152 g/t AgEq), 5.95 m of 9.70% Pb+Zn (234 g/t AgEq), and 12.20 m of 14 g/t Ag and 9.69% Pb+Zn (238 g/t AgEq). Hole AL26-278intersected 2.25 m of 33 g/t Ag and 7.09% Pb+Zn (229 g/t AgEq)and hole AL26-281reported 3.35 m of 5.39% Pb+Zn (129 g/t AgEq). The reported intercepts occur roughly 300 m below the surface, 100-200 metres below intersections in holes AL26-248, AL26-256, AL26-258, AL26-263, and AL26-265, which reported significantly higher Ag, Au, and Cu values and generally lower base-metal grades (Table 6; Figure 6; see news releases dated September 24 and October 22, 2026).

[](https://images.newsfilecorp.com/files/3455/321940_figure%206.jpg)

Figure 6. Longitudinal section of Quintera, Travesia, and Promontoriozones, highlighting recent drilling at Promontorio Sur and Quintera. Click to enlarge.

To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/3455/321940_figure%206.jpg

Table 6. Assay highlights for Promontorio Sur vein zone_._True widths are based on current interpretation of mineralized structures._Weight-averaged silver-equivalent grades (AgEq g/t) are based on the 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 | | AL26-272 | 243.10 | 243.60 | 0.5 | 0.35 | 4 | 0.02 | 0.01 | 3.02 | 5.56 | 199 | | 279.00 | 281.10 | 2.10 | 1.50 | 4 | 0.06 | 0.02 | 1.98 | 4.26 | 152 | | | 292.15 | 298.10 | 5.95 | 4.20 | 5 | 0.07 | 0.01 | 2.24 | 7.46 | 234 | | | 302.80 | 315.00 | 12.20 | 8.60 | 14 | 0.02 | 0.01 | 2.08 | 7.61 | 238 | | | including | | | | | | | | | | | | 308.90 | 314.35 | 5.45 | 3.85 | 21 | 0.02 | 0.01 | 2.58 | 10.99 | 336 | | | 338.25 | 339.50 | 1.25 | 0.90 | 9 | 0.02 | 0 | 0.99 | 5.17 | 153 | | | AL26-278 | 276.00 | 278.25 | 2.25 | 1.35 | 33 | 0.28 | 0.17 | 2.98 | 4.11 | 229 | | including | | | | | | | | | | | | 277.20 | 277.70 | 0.50 | 0.30 | 113 | 0.72 | 0.53 | 7.62 | 12.75 | 677 | | | AL26-281 | 252.55 | 253.95 | 1.40 | 0.90 | 4 | 0.03 | 0.01 | 2.09 | 6.49 | 203 | | 272.25 | 275.60 | 3.35 | 2.20 | 4 | 0.03 | 0.01 | 1.58 | 3.81 | 129 | | | including | | | | | | | | | | | | 272.25 | 273.30 | 1.05 | 0.70 | 7 | 0.02 | 0.01 | 4.62 | 7.5 | 280 | | | 283.25 | 284.25 | 1.00 | 0.65 | 15 | 0.03 | 0 | 1.7 | 5.13 | 173 | | | AL26-284 | 114.55 | 116.1 | 1.55 | 1.10 | 46 | 0.13 | 1.11 | 0.76 | 3.05 | 240 | | 125.35 | 128.2 | 2.85 | 2.05 | 16 | 0.26 | 0.01 | 2.29 | 6.95 | 251 | | | including | | | | | | | | | | | | 127.7 | 128.20 | 0.50 | 0.35 | 16 | 0.04 | 0.01 | 7.99 | 16.60 | 574 | | | 169.40 | 172.95 | 3.55 | 2.50 | 15 | 0.04 | 0.01 | 1.52 | 3.63 | 136 | |

San Jose Vein Zone Hole AL26-276 reported a0.50-m interval of 156 g/t AgEq(147 g/t Ag, 0.01 g/t Au, 0.04% Cu, 0.07% Pb, 0.15% Zn), about 60 m north of the intercept reported in hole AL26-267(0.30 m of 782g/t AgEq) (Table 7; Figure 7; see news release dated October 22, 2026).

[](https://images.newsfilecorp.com/files/3455/321940_figure%207.jpg)

Figure 7. Longitudinal section of theSan Jose vein zone, showing positions of drill intercepts. Click to enlarge.

To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/3455/321940_figure%207.jpg

Table 7. Assay highlights for San Jose vein zone_._True widths are based on current interpretation of mineralized structures._Weight-averaged silver-equivalent grades (AgEq g/t) are based on the 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 | | AL26-276 | 83.60 | 84.10 | 0.50 | 0.45 | 147 | 0.01 | 0.04 | 0.07 | 0.15 | 156 | | 137.00 | 137.50 | 0.50 | 0.45 | 68.9 | 0.04 | 0.06 | 0.37 | 0.66 | 101 | |

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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

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

| 1570- 200 Burrard Street Vancouver, BC V6C 3L6 | Telephone: 1 778 330-0994 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 courier 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.