Arizona Sonoran Drilling Expands Primary Sulphide Zone Under and Around the Cactus West Pit

Arizona Sonoran Copper Company Inc. (TSX:ASCU | OTCQX:ASCUF) (“ASCU” or the “Company”) reports new drill assay results from its infill and step-out drilling program below the previously untested extents of primary copper mineralization around the Cactus West pit, on the Cactus Project, in Arizona. Drilling builds upon the Company’s PEA drill database, extending the primary sulphide zones by upwards of 500 ft (152 m) below known mineralization (see FIGURES 1 – 10).

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A total of 17 drill holes are reported herein for a total of 30,601 ft (9,387 m) of drilling, targeting the primary sulphides below the oxide and enriched zones at Cactus West. Step-out drilling continues with two drill rigs at Cactus West.

Drilling Highlights:

• ECW-256: 2,119* ft (646 m) @ 0.40% CuT of continuous mineralization
  • 1,896.6 ft (578 m) @ 0.41% CuT, 0.005% Mo (primary)
• ECW-258: 2,108 ft (643 m) @ 0.31% CuT of continuous mineralization
  • 2,001 ft (610 m) @ 0.31% CuT, 0.005% Mo (primary)
• ECW-260: 1,901 ft (579 m) @ 0.33% CuT of continuous mineralization
  • 1,696 ft (517 m) @ 0.33% CuT, 0.009% Mo (primary)
• ECW-266: 1,571 ft (479 m) @ 0.33% CuT of near continuous mineralization
  • 1,309 ft (399 m) @ 0.36% CuT, 0.009% Mo (primary)
• ECW-252: 1,002 ft (305 m) @ 0.40% CuT of continuous mineralization
  • 352 ft (107 m) @ 0.44% CuT, 0.41% Cu TSol, 0.014% Mo (enriched)
  • 650 ft (198 m) @ 0.37% CuT, 0.017% Mo (primary)

NOTE: True widths are not known, * includes 1.9 ft of core loss

George Ogilvie, Arizona Sonoran President and CEO commented, “The drill program at Cactus West is showing significantly more primary sulphide mineralization below and outside of the existing resource pit shell. In conjunction with drilling at Cactus West our geological team is in the process of preparing for an infill drilling program at Parks/Salyer, predominantly focused on the southern claim block (MainSpring) to move into an indicated resource ahead of a new PFS next year. As the team’s focus is on advancing Cactus to the PFS level, additional workstreams are ongoing, including metallurgical column testing. New columns from the southern claim block for Parks/Salyer, are anticipated to start in 4Q24, once new metallurgical core has been made available.”

Drilling Recap

The 2024 Cactus West infill and exploration drill program was designed to support the expansion of primary sulphide mineralization down to the basement fault below the oxide and enriched material, and laterally to extend mineralization in the south and southwest of the known resources.

Bedrock at Cactus West is exposed approximately 150 feet to the south-southeast of the Cactus West pit at the “Discovery Hill”. The bedrock contact slopes away from Discovery Hill, with up to approximately 100 ft (30 m) of alluvium cover in all directions. Gila conglomerate lies beneath the alluvium cover and increases in thickness to the west, east and south. Mineralized bedrock lies directly beneath the Gila conglomerate and the depth to bedrock extends from 0 feet at discovery hill to approximately 420 ft (128 m) at drill hole ECW-241 (PR JUN 10, 2024), 1,200 ft (366 m) to the west.

The main lithologies at Cactus West are like those seen at Cactus East and Parks/Salyer. Copper mineralization is hosted by brecciated porphyritic monzonite and granite with lesser dikes composed of porphyritic dacite and local diabase. There is typically a thin enriched zone sitting above thick primary mineralization. Drilling shows that copper grades increase at depth in the primary zone in proximity to a barren potassic quartz monzonite porphyry unit. This unit is typically 100-200 feet thick and lies directly above the basement fault.

Drilling has extended the primary mineralization another 500ft below and adjacent to the Cactus West open pit that was presented in the recently issued Preliminary Economic Assessment (PR AUG 7, 2024). Phase 2 of the primary exploration drilling, which remains ongoing, is testing lateral stepouts from Cactus West PEA pit shell to the north, south, and southwest.

TABLE 1: Significant Drilling Intercepts

Hole

Zone

Feet

Meters

CuT

Cu TSol

Mo

id

from

to

length

from

to

length

%

%

%

ECW-252

enriched

357.0

709.0

352.0

108.8

216.1

107.3

0.44

0.41

0.014

including

411.7

456.0

44.3

125.5

139.0

13.5

0.63

0.62

0.040

and

623.0

653.0

30.0

189.9

199.0

9.1

1.28

1.26

0.009

primary

709.0

1,359.0

650.0

216.1

414.2

198.1

0.37

0.03

0.017

including

1078.0

1,147.0

69.0

328.6

349.6

21.0

0.78

0.05

0.026

and

1211.7

1,290.0

78.3

369.3

393.2

23.9

0.58

0.04

0.060

ECW-253

enriched

197.8

442.8

245.0

60.3

135.0

74.7

0.41

0.37

0.008

including

197.8

238.0

40.2

60.3

72.5

12.3

0.65

0.64

0.008

and

280.0

320.0

40.0

85.3

97.5

12.2

0.78

0.78

0.008

primary

442.8

1,248.0

805.2

135.0

380.4

245.4

0.26

0.03

0.008

including

581.0

637.0

56.0

177.1

194.2

17.1

0.34

0.03

0.002

and

932.0

962.0

30.0

284.1

293.2

9.1

0.40

0.03

0.015

and

1140.9

1,218.0

77.1

347.7

371.2

23.5

0.58

0.05

0.020

ECW-255

oxide

314.6

345.0

30.4

95.9

105.2

9.3

0.33

0.24

0.022

enriched

345.0

506.0

161.0

105.2

154.2

49.1

0.26

0.24

0.008

including

355.0

402.0

47.0

108.2

122.5

14.3

0.35

0.32

0.006

primary

554.8

1848

1293.2

169.1

563.3

394.2

0.32

0.031

0.008

including

1456.0

1,628.0

172.0

443.8

496.2

52.4

0.46

0.03

0.006

and

1765.0

1,809.3

44.3

538.0

551.5

13.5

0.57

0.04

0.020

ECW-256

enriched

453.4

675.4

222.0

138.2

205.9

67.7

0.31

0.22

0.003

primary

675.4

2,572.0

1,896.6

205.9

783.9

578.1

0.41

0.04

0.005

including

2345.7

2,500.7

155.0

715.0

762.2

47.2

0.77

0.07

0.011

ECW-257

enriched

536.0

670.0

134.0

163.4

204.2

40.8

0.52

0.48

0.007

including

546.0

580.0

34.0

166.4

176.8

10.4

1.36

1.33

0.011

primary

670.0

1,104.9

434.9

204.2

336.8

132.6

0.28

0.03

0.008

including

895.0

1,057.0

162.0

272.8

322.2

49.4

0.37

0.03

0.012

ECW-258

enriched

252.3

359.0

106.7

76.9

109.4

32.5

0.23

0.17

0.004

primary

359.0

2,360.3

2,001.3

109.4

719.4

610.0

0.31

0.03

0.005

including

793.0

836.0

43.0

241.7

254.8

13.1

0.46

0.03

0.003

and

871.2

1,013.0

141.8

265.5

308.8

43.2

0.52

0.04

0.011

and

2,009.0

2,112.0

103.0

612.3

643.7

31.4

0.67

0.05

0.007

ECW-259

oxide

377.0

407.0

30.0

114.9

124.1

9.1

0.21

0.15

0.002

ECW-260

enriched

257.0

432.0

175.0

78.3

131.7

53.3

0.38

0.28

0.011

including

314.2

344.0

29.8

95.8

104.9

9.1

0.68

0.66

0.012

primary

432.0

2,127.6

1,695.6

131.7

648.5

516.8

0.33

0.03

0.009

including

522.0

669.7

147.7

159.1

204.1

45.0

0.60

0.04

0.018

and

1598.0

1,778.0

180.0

487.1

541.9

54.9

0.46

0.03

0.008

and

1807.0

1,937.0

130.0

550.8

590.4

39.6

0.43

0.03

0.012

ECW-261

enriched

212.2

295.5

83.3

64.7

90.1

25.4

0.29

0.25

0.001

including

218.0

248.0

30.0

66.4

75.6

9.1

0.44

0.41

0.002

primary

212.2

1,663.3

1,451.1

64.7

507.0

442.3

0.24

0.04

0.006

including

1292.0

1,381.0

89.0

393.8

420.9

27.1

0.39

0.03

0.010

and

1497.0

1,638.3

141.3

456.3

499.4

43.1

0.58

0.04

0.022

ECW-262

enriched

284.3

393.5

109.2

86.7

119.9

33.3

0.43

0.40

0.008

primary

393.5

1,450.0

1,056.5

119.9

442.0

322.0

0.25

0.03

0.007

including

853.0

883.0

30.0

260.0

269.1

9.1

0.48

0.04

0.008

and

997.0

1,059.2

62.2

303.9

322.8

19.0

0.40

0.04

0.011

and

1112.0

1,182.0

70.0

338.9

360.3

21.3

0.40

0.03

0.013

and

1232.0

1,299.0

67.0

375.5

395.9

20.4

0.40

0.04

0.010

and

1346.0

1,420.5

74.5

410.3

433.0

22.7

0.57

0.05

0.026

ECW-263

oxide

424.5

446.0

21.5

129.4

135.9

6.6

0.34

0.30

0.002

enriched

541.0

601.0

60.0

164.9

183.2

18.3

0.11

0.07

0.013

enriched

642.0

840.0

198.0

195.7

256.0

60.4

0.29

0.15

0.007

including

810.0

840.0

30.0

246.9

256.0

9.1

0.47

0.11

0.005

primary

840.0

1,420.0

580.0

256.0

432.8

176.8

0.31

0.04

0.005

including

840.0

940.0

100.0

256.0

286.5

30.5

0.41

0.06

0.005

and

1240.0

1,300.0

60.0

378.0

396.2

18.3

0.42

0.04

0.006

ECW-264

oxide

493.4

872.8

379.4

150.4

266.0

115.6

0.26

0.22

0.007

including

503.5

547.0

43.5

153.5

166.7

13.3

0.34

0.28

0.005

and

563.2

613.0

49.8

171.7

186.8

15.2

0.45

0.38

0.006

enriched

872.8

1,093.0

220.2

266.0

333.1

67.1

0.24

0.23

0.009

including

872.8

933.0

60.2

266.0

284.4

18.3

0.51

0.48

0.008

primary

1093.0

1,562.3

469.3

333.1

476.2

143.0

0.16

0.02

0.007

including

1500.0

1,562.3

62.3

457.2

476.2

19.0

0.31

0.03

0.004

ECW-265

enriched

346.5

538.0

191.5

105.6

164.0

58.4

0.52

0.48

0.010

including

346.5

443.7

97.2

105.6

135.2

29.6

0.77

0.75

0.010

primary

538.0

1,520.0

982.0

164.0

463.3

299.3

0.31

0.03

0.013

including

735.0

765.0

30.0

224.0

233.2

9.1

0.65

0.05

0.011

and

1297.0

1,438.0

141.0

395.3

438.3

43.0

0.50

0.03

0.014

ECW-266

oxide

393.0

418.0

25.0

119.8

127.4

7.6

0.21

0.13

0.004

enriched

487.0

617.3

130.3

148.4

188.2

39.7

0.36

0.30

0.004

including

517.0

554.0

37.0

157.6

168.9

11.3

0.65

0.62

0.006

primary

654.7

1,964.0

1,309.3

199.6

598.6

399.1

0.36

0.03

0.009

including

1222.0

1,262.0

40.0

372.5

384.7

12.2

0.53

0.04

0.016

and

1470.0

1,626.0

156.0

448.1

495.6

47.5

0.50

0.04

0.009

and

1676.0

1,716.0

40.0

510.8

523.0

12.2

0.46

0.04

0.013

and

1876.0

1,934.3

58.3

571.8

589.6

17.8

0.67

0.04

0.013

ECW-267

oxide

526.0

906.0

380.0

160.3

276.1

115.8

0.35

0.29

0.005

including

573.0

623.0

50.0

174.7

189.9

15.2

0.50

0.45

0.005

and

639.0

718.7

79.7

194.8

219.1

24.3

0.48

0.41

0.006

and

807.0

849.6

42.6

246.0

259.0

13.0

0.53

0.47

0.005

enriched

906.0

1,033.0

127.0

276.1

314.9

38.7

0.51

0.32

0.006

primary

1033.0

1,468.0

435.0

314.9

447.4

132.6

0.27

0.03

0.009

ECW-268

enriched

780.0

823.5

43.5

237.7

251.0

13.3

0.48

0.47

0.001

enriched

893.0

933.0

40.0

272.2

284.4

12.2

0.17

0.15

0.001

primary

953.0

1,367.7

414.7

290.5

416.9

126.4

0.14

0.02

0.001

including

1326.0

1,367.7

41.7

404.2

416.9

12.7

0.24

0.02

0.000

ECW-269

oxide

828.1

1,245.0

416.9

252.4

379.5

127.1

0.23

0.19

0.003

including

848.0

934.0

86.0

258.5

284.7

26.2

0.49

0.43

0.006

primary

1245.0

1,751.3

506.3

379.5

533.8

154.3

0.18

0.02

0.004

including

1701.8

1,742.0

40.2

518.7

531.0

12.3

0.47

0.04

0.011

1.

Intervals are presented in core length and are drilled vertically outside of the pit limits or angled where drilling under the historical Sacaton pit.

2.

Drill assays assume a mineralized cut-off grade of 0.1% CuT reflecting the potential for heap leaching of open pit material in the case of Oxide and Enriched or in the case of Primary material to provide typical average grades. Holes were terminated below the basement fault except ECW-259 which terminated short of the mineralized zone.

3.

Assay results are not capped. Intercepts are aggregated within geological confines of major mineral zones.

4.

Includes 1.9ft core loss in ECW-256, and 0.2ft missing core in ECW-258.

5.

True widths are not known.

Table 2: Drilling Details

Hole

Easting (m)

Northing (m)

Elevation (ft)

TD (ft)

Azimuth

Dip

ECW-252

423436.2

3646065.4

1436.5

1674.7

0.0

-90.0

ECW-253

423568.4

3646061.2

1437.6

1468.0

0.0

-90.0

ECW-255

423511.2

3646122.0

1437.7

2002.0

24.0

-65.0

ECW-256

423438.3

3646129.5

1430.0

2598.8

24.0

-45.0

ECW-257

423497.4

3645937.8

1447.3

1269.4

0.0

-90.0

ECW-258

423677.8

3646048.3

1443.4

2485.0

0.0

-45.0

ECW-259

423438.3

3646129.5

1430.0

433.6

24.0

-60.0

ECW-260

423568.5

3646061.4

1436.9

2215.0

8.0

-53.0

ECW-261

423678.2

3646046.6

1443.4

1928.0

0.0

-65.0

ECW-262

423568.4

3646060.0

1436.4

1741.6

8.0

-75.0

ECW-263

423336.1

3646216.8

1433.6

1861.8

0.0

-90.0

ECW-264

423282.5

3646363.1

1430.0

1852.7

0.0

-90.0

ECW-265

423507.7

3646071.9

1437.0

1795.1

25.0

-75.0

ECW-266

423427.6

3646061.6

1435.4

2241.0

20.0

-55.0

ECW-267

423307.1

3646278.5

1434.1

1874.8

0.0

-90.0

ECW-268

423504.5

3645609.8

1498.5

1367.7

0.0

-90.0

ECW-269

423950.1

3647229.9

1470.0

1792.2

0.0

-90.0

Note: Drill locations are based on drill plans and hand-held GPS locators and may be adjusted slightly when properly surveyed.

Quality Assurance / Quality Control

Drilling completed on the project between 2020 and 2023 was supervised by on-site ASCU personnel who prepared core samples for assay and implemented a full QA/QC program using blanks, standards, and duplicates to monitor analytical accuracy and precision. The samples were sealed on site and shipped to Skyline Laboratories in Tucson AZ for analysis. Skyline’s sample prep, analytical methodologies, and quality control system complies with global certifications for Quality ISO9001:2008.

Technical aspects of this news release have been reviewed and verified by Allan Schappert – CPG #11758, who is a qualified person as defined by National Instrument 43-101– Standards of Disclosure for Mineral Projects.

Links from the Press Release

Figures 1-11: https://arizonasonoran.com/projects/cactus-mine-project/press-release-images/

June 10, 2024: https://arizonasonoran.com/news-releases/arizona-sonoran-drilling-extends-primary-mineralization-by-750-ft-229-m-around-the-cactus-west-pit/

August 7, 2024: https://arizonasonoran.com/news-releases/arizona-sonoran-standalone-pea-for-cactus-open-pit-project-reports-post-tax-npv8-of-us-2.03-billion-c-2.77-billion-and-irr-of/

Neither the TSX nor the regulating authority has approved or disproved the information contained in this press release.

About Arizona Sonoran Copper Company (www.arizonasonoran.com | www.cactusmine.com)

ASCU’s objective is to become a mid-tier copper producer with low operating costs and to develop the Cactus and Parks/Salyer Projects that could generate robust returns for investors and provide a long term sustainable and responsible operation for the community and all stakeholders. The Company's principal asset is a 100% interest in the Cactus Project (former ASARCO, Sacaton mine) which is situated on private land in an infrastructure-rich area of Arizona. Contiguous to the Cactus Project is the Company’s 100%-owned Parks/Salyer deposit that could allow for a phased expansion of the Cactus Mine once it becomes a producing asset. The Company is led by an executive management team and Board which have a long-standing track record of successful project delivery in North America complemented by global capital markets expertise.

Forward-Looking Statements

Forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of ASCU to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Factors that could affect the outcome include, among others: future prices and the supply of metals; the results of drilling; inability to raise the money necessary to incur the expenditures required to retain and advance the properties; environmental liabilities (known and unknown); general business, economic, competitive, political and social uncertainties; results of exploration programs; accidents, labour disputes and other risks of the mining industry; political instability, terrorism, insurrection or war; or delays in obtaining governmental approvals, projected cash operating costs, failure to obtain regulatory or shareholder approvals.

Although ASCU has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results to differ from those anticipated, estimated or intended. Forward-looking statements contained herein are made as of the date of this news release and ASCU disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or results or otherwise, except as required by applicable securities laws.

View source version on businesswire.com: https://www.businesswire.com/news/home/20240916116755/en/

For more information Alison Dwoskin, Director, Investor Relations 647-233-4348 [e-mail]

George Ogilvie, President, CEO and Director 416-723-0458 [e-mail]