Mr. Rick Van Nieuwenhuyse reports

AMERICAN COPPER DEVELOPMENT CORPORATION CONFIRMS LARGE SCALE PORPHYRY SYSTEM AT LORDSBURG, NEW MEXICO; WIDESPREAD HIGH GRADE COPPER MINERALIZATION INTERSECTED INCLUDING 44M OF 1.00% CUEQ

American Copper Development Corp. has provided assay results from six diamond drill holes totalling 4,661 metres recently completed at the Lordsburg project, New Mexico.

Highlights include:

• AC23-006 intersected 44 m of 1 per cent copper equivalent* (0.86 per cent copper, 10.55 grams per tonne silver and 0.1 g/t gold), including 18 m of 2.13 per cent CuEq, 14 m of 2.75 per cent CuEq and three m of 11.35 per cent CuEq (9.48 per cent Cu, 217.5 g/t Ag and 0.56 g/t Au);
• AC23-005 intersected 9.9 m of 0.52 per cent CuEq (0.44 per cent Cu, 9.57 g/t Ag and 0.2 g/t Au);
• AC23-004 intersected 38 m of 0.39 per cent CuEq, including 12 m of 1.02 per cent CuEq (0.94 per cent Cu, 9.44 g/t Ag and 0.2 g/t Au);
• AC23-001 intersected 36.6 m of 0.38 per cent CuEq, including 7.6 m of 0.69 per cent CuEq (0.52 per cent Cu, 18.90 g/t Ag and 0.06 g/t Au).

The 2023 drilling campaign was designed to follow up on and extend previously identified porphyry copper-related mineralization, test previously undrilled areas in and around the known high-grade copper, silver, gold vein mineralization at the historic Bonney and Misers Chest mines, and test newly identified areas for porphyry copper mineralization based on the 3-D deep-penetrating induced polarization/magnetotelluric Titan survey completed by Quantec earlier this year.

Rick Van Nieuwenhuyse, chairman, comments: "Results from our initial exploration program have demonstrated that a very large-scale porphyry system is active at Lordsburg with widespread high-grade intervals of copper mineralization. We are very pleased with these initial results from the phase I drill program. They demonstrate widespread pervasive propylitic and phyllic alteration with copper mineralization consistently associated with chalcopyrite-magnetite-kspar stockwork veining. Hole AC23-006 intersected a solid interval averaging 1 per cent copper equivalent with multiple higher-grade zones. Hole AC23-005 intersected unmapped underground workings, which resulted in having to abandon the hole. This hole was intended to test a large mag-high signature further west and remains untested. The strong association of chalcopyrite and magnetite suggest vectoring on mag highs needs to be further drill tested. We were also able to relog the drill core previously drilled by Entree Gold. All of this information is being integrated into our 3-D drill hole database along with the geophysical and multielement geochemical data and will be used to vector into the core of the system. The large-scale footprint is demonstrated, and now we need to use science and hard work to find the porphyry copper centre."

Based on results of the 2023 program, the company announced that it has significantly expanded its land position to the east of the existing Lordsburg claims which now brings the new total land package to 1,205 contiguous federal patented and unpatented lode mining claims, covering 9,462 hectares in area controlled by the company.

AC23-001

This hole was designed to test the eastern extension of the historically mined North Atwood vein, which was intersected between 335 feet and 498 feet. A second, previously unknown and unnamed vein complex was cut between 907 ft and 962 feet. Mineralization consists of copper oxide and sulphides, pyrite plus/minus magnetite in strongly silicified and brecciated rock hosted by intensely and pervasively propylitized andesite.

AC23-002

AC23-002 was located approximately 3,500 ft northeast of the Entree Gold drilling and was designed to test a deep chargeability high along a potential structural corridor to the north and east of the pre-existing drilling. This hole did not contain significant copper assays; however, the hole did intersect intensely and pervasively K-spar altered and well-mineralized pyrite-chalcopyrite-K-spar stockwork veining most certainly indicative of porphyry-style mineralization. Both Cretaceous andesitic wall rocks and Laramide porphyry and Laramide hydrothermal breccia contain extensive replacement of primary mineralogy and texture by chlorite, epidote and calcite with ubiquitous pyritic stockwork veining and disseminated chalcopyrite plus/minus magnetite. While assays did not yield reportable widths and grades, spot analyses using a hand-held Vanta X-ray fluorescence analyzer yielded up to 2,600 parts per million Cu.

AC23-003

AC23-003 was collared north and west of the Anita vein in an area with outcropping silicified breccia pipes and coincident radiometric K and magnetic anomalies, approximately one mile south of a strongly argillized road cut. It was collared in unaltered, post-Laramide quartz monzonite porphyry and passed at shallow depth into Laramide feldspar porphyry affected by moderately pervasive propylitic alteration. From 530 ft to 780 ft, strong phyllic alteration with quartz and sericite overprints the propylitized porphyry. This phyllic alteration zone, similar in appearance to the road cut, hosts common and abundant, black calcite, manganese-oxide and sulphide-bearing veinlets. The processes of leaching and secondary enrichment may be responsible for its occurrence.

AC23-004

AC23-004 was the longest hole of the program, reaching a final depth of 3,826.5 feet. It was collared just east of the Misers Chest shaft and was designed to test the high-grade copper veins historically mined in addition to drilling beyond the deepest workings. This hole started in propylitized andesite, passing at 229 ft into propylitized Laramide porphyry. At a depth of 830 ft, the drill hole cut into contact metamorphosed Cretaceous sediments of the Bisbee group. Hornfels, proto-skarn and silica-pyrite rock occur as alteration of the Bisbee group and persisted to the final drilled depth.

Mineralized intervals within the contact metamorphosed units typically contain common, thin, irregular chalcopyrite veinlets with irregular, seemingly arbitrary, zones with chalcopyrite concentrations greater than 50 per cent of the core volume.

AC23-005

AC23-005 was collared on the same pad as AC23-004, and was angled to the west to drill test a large mag-high anomaly surrounding the historic Misers Chest and Bonney workings. This hole also began in propylitized andesite before passing into propylitized Laramide porphyry at 257 ft and then into contact metamorphosed Bisbee group sediments at 927 ft. As with AC23-004, hornfels, proto-skarn and so-called silica-pyrite rock of the Bisbee group persisted to the final drilled depth.

AC23-005 penetrated an open stope from the Misers Chest historic underground mine between 875 and 890 ft below collar. The stope and recovered core to a depth of 927 feet cut the Last Chance vein characterized by coarse-grained masses of chalcopyrite and chalcopyrite veinlets with approximately five ft intervals displaying over 1 per cent Cu assays. The hole was abandoned, prematurely, after penetrating a second underground working between 1,304 ft and 1,318 ft.

AC23-006

AC23-006 was also collared on the AC23-004 pad. It was drilled to the northeast and aimed to test the northeast projection of mineralization found in AC23-004. It was collared in propylitized Cretaceous andesite and passed into propylitized Laramide porphyry at a depth of 151 ft. Contact metamorphosed Bisbee group sediments were first cut at a depth of 831 ft and persisted to 1,038 feet. The next section of the hole passed back into Laramide porphyry, and then between 1,555 ft and 1,779 feet, Bisbee group hornfels were again intersected. Bisbee group hornfels and proto-skarn were observed down to where Laramide porphyry was cut from 1,779 ft to the final drilled depth of 3,000 ft.

The best mineralized interval, between 872 ft and 1,017 ft, was entirely within the contact metamorphosed Bisbee group sediments and, like the mineralization in AC23-004, contains common, thin, irregular chalcopyrite veinlets with irregular, seemingly arbitrary, zones with chalcopyrite concentrations greater than 50 per cent of the core volume.

Sampling methodology, chain of custody, quality assurance and quality control

All sampling was conducted under the supervision of the company's project manager. Samples were delivered to the ALS Laboratories preparation facility in Tucson, Ariz., where a chain of custody was received upon delivery. The samples were analyzed as one-half core and averaged 1.5 m in length. Samples were crushed, pulverized and then analyzed using industry-standard analytical methods including a four-acid inductively coupled plasma mass spectrometry 48-multielement package and a four-acid digestion method for high-grade copper and silver samples in Vancouver, B.C. Gold was analyzed on a 30-gram aliquot by fire assay with an atomic absorption spectroscopy finish. Three QA/QC samples (one standard reference material (SRM), one duplicate and one blank) selected by the logging geologist were inserted at a rate of plus/minus 15 per cent. Duplicate sample ID tags are stapled into core boxes at end of sample interval. Coarse barren granitic landscaping, crushed rock was used as the blank material. Four SRMs were used in 2023, ranging in accepted copper values of 0.27 per cent to 1.1 per cent. On top of internal QA/QC protocol, additional blanks, reference materials and duplicates were inserted by the analytical laboratory according to its internal procedures. The analytical results for the QA/QC samples indicated satisfactory analytical accuracy and precision for the assay program.

Next steps

The company is currently relogging all the Entree Gold drill core in order to gain a better understanding of the mineralization and textures, and to better integrate these data into its database. The company has completed approximately 12,000 ft of relogging to date. It will be spending the next few months reviewing all the layers of data it has compiled and collected over the past year to help with target generation for a second round of drilling.

The Lordsburg project

American Copper's Lordsburg project is strategically located in a porphyry-rich copper region of southwestern New Mexico at the intersection of the northeast-trending Santa Rita lineament and the northwest-trending Texas lineament. Significant historical production from the district includes three million to four million tonnes from polymetallic veins with average hypogene grades of 2 to 3 per cent Cu, two to three ounces per tonne Ag and approximately 0.11 ounce per tonne Au. Increasing copper grades are found at depth on the Lordsburg property with historically drilled intercepts from underground of 4-plus per cent copper. Detailed geophysical and geochemical surveys suggest the potential for multiple porphyry centres on the property.

Qualified person

Mark Osterberg, PGeo, a qualified person as defined by National Instrument 43-101 Standards of Disclosure for Mineral Projects, has read and approved all technical and scientific information contained in this news release.

About American Copper Development Corp.

The company is engaged in the business of mineral exploration and the acquisition of mineral property assets. Its objective is to locate and develop economic precious and base metal properties of merit and to conduct its exploration programs on the Lordsburg property and the Chuchi South and West properties.

We seek Safe Harbor.