Sable Announces Termination of Don Julio Project Earn-in Agreement with South32 and Highlights Exploration Upside in Four Identified Porphyry Targets

VANCOUVER, British Columbia, July 28, 2025 (GLOBE NEWSWIRE) -- Sable Resources Ltd. ("Sable" or the "Company") (TSXV:SAE | OTCQB:SBLRF) announces that South32 Aluminum (Holdings) Pty Ltd (“South32”) has terminated the Earn-In Agreement dated January 28, 2021, and Sable remains 100% in control of the Don Julio project, located in San Juan, Argentina.

Ruben Padilla, Sable’s President and CEO, stated:

“We truly appreciate the support of South32 in the advancement of the Don Julio project over the past four years. South32 funded 12,717 metres of reconnaissance drilling and detailed geophysical and geochemical studies, as well as the construction of all necessary road infrastructure, resulting in the discovery of a cluster of four mineralized porphyry centres.

The Don Julio mineral system was identified by Sable in 2018 as a result of an exploration strategy aimed at identifying large, underexplored mineral systems along gaps and potential extensions of well-endowed mineral belts in Argentina. Six years later, the Miocene Central Andes, which extend into the San Juan Province, have become one of the prime exploration jurisdictions in the search for large, porphyry-related Cu-Au-Mo deposits. Sable has regained 100% control over the large Don Julio land package, with improved geological understanding and four confirmed targets, supporting potential to host multi-million tonne Cu-Au-Mo porphyries, presently ready for follow-up drilling.”

From a regional point of view, work advanced by Sable and by its neighbour, Minsud Resources Corp. (“Minsud”) (also funded by South32), is revealing a new, emerging mineral district in San Juan Province. The new “Chita” district (Figure 1) includes the historic Chita Cu porphyry deposit, the recently discovered Chinchillones polymetallic deposit, and all the targets within Sable’s Don Julio project.

Figure 1. On the left, a map showing the known extension of the Central Andes Miocene Mineral Belt in Argentina’s San Juan Province and known ore deposits, including Sable’s projects and the emerging Chita porphyry district. On the right, deposits and targets of the Chita district are highlighted, in relation to the properties of Sable and Minsud¹.

Description of the Don Julio Project Targets

Technical work, funded by South32 and carried out by Sable, from 2021 to 2025, generated multiple exploration targets, at least five of which remain open for additional drilling. Three of these targets La Gringa, El Morro and Punta Cana, are Cu-Au or Cu-Mo porphyries which are immediately ready for follow-up drilling. The Tocota Au-Cu porphyry is ready for its inaugural drill campaign.

Figure 2. Plan view of the extent of the Don Julio lithocap and the location of the La Gringa and Morro porphyry occurrences.

Gringa – El Morro Targets

La Gringa and El Morro targets are located at the northern and southern limits, respectively, of the large, outcropping root zone of a Miocene lithocap. Known outcropping Cu-Au occurrences are related to high sulfidation mineralization (Figure 2). Initial drilling tested a possible connection at depth with Cu-Au-Mo porphyry mineralization in two areas, where early quartz veinlets and magmatic-hydrothermal breccias were overprinted by advanced argillic alteration and high-sulfidation mineralization. Large parts of the surface geology between La Gringa and El Morro are covered by thin layers of post-mineral volcanics and Quaternary gravels.

Nine drill holes have partially explored the La Gringa target. Several of these drill holes have encountered strong potassic alteration with B-type veinlets containing molybdenum mineralization typical of the margins of well-mineralized Cu-Au-Mo porphyry centers. Some of the most significant results include²:

DJ-DH-22-11
305m @ 139 ppm Mo; 0.091% Cu; and 0.95 g/t Ag from 528.0 to 833.0m

DJ-DH-22-15
157m @ 319 ppm Mo and 0.068% Cu from 844.0 to 1,001m

DJ-DH-22-07
61.9m @ 0.16% Cu, 0.2 g/t Au and 1.5 g/t Ag from 28.5 to 90.4m
125.0m @ 107.3 ppm Mo from 675.0 to 800.0m

Three of the drill holes completed at the southern limit of La Gringa, targeted mineralization below Quaternary gravel cover and intercepted high-grade Cu-Au-Ag high-sulfidation mineralization hosted by fault zones and magmatic-hydrothermal breccias:

DJ-DH-22-12
11.1m @ 1.61% Cu; 19.1 g/t Ag; 0.38 g/t Au from 53.0 to 64.1m
13.7m @ 0.54% Cu; 6.81 g/t Ag; 0.95 g/t Au from 149.0 to 162.7m

The El Morro Target is located 2.5 km south of La Gringa. El Morro shows extensive alteration and positive geochemistry. One hole was completed in 2024, demonstrating the existence of porphyry mineralization with potassic alteration and molybdenum-bearing B-type veinlets, probably related to a large porphyry system that includes the La Gringa porphyry zone:

DJ-DH-24-23
245m @ 114 ppm Mo from 397.2m

Punta Cana Target

Punta Cana is another Miocene Cu-Au porphyry centre discovered by Sable’s technical team in 2021. Only three holes have been drilled at this target with all holes intercepting significant mineralization as demonstrated by the following intercepts²:

DJ-DH-22-06
75.25m @ 14.08 g/t Ag; 0.11 g/t Au; 0.12% Cu from 324.0 to 399.25

DJ-DH-22-08
403m @ 0.12 g/t Au; 3.65 g/t Ag; 0.077% Cu from 150.0m to 553.0m

DJ-DH-23-16
156.0m @ 6.39 g/t Ag; 0.11 g/t Au; 0.086% Cu; 32 ppm Mo from 281.0 to 437.0m

Tocota Target

The Tocota porphyry was discovered by Sable in 2022. Outcropping Miocene diorites show porphyry-style veinlets and have returned values up to 0.3 g/t Au and 0.3% Cu. The Tocota target has yet to be drilled and is now prepared for initial drill testing.

Pumas Target

The Pumas target is located 21 km southeast of the main Don Julio cluster. It was discovered in 2019 as part of Sable’s regional exploration work. Pumas is an intrusion-related Cu-Au-Ag-Mo target that has been explored by rock sampling, soil sampling, and trenching. Below are some of the most attractive values found during trenching²:

TLP-08
31.4m @ 0.3 g/t AuEq and 9m @ 1.2 g/t AuEq

TLP-09
35.2m @ 0.71 g/t AuEq

TLP-012
33.4m @ 0.35 g/t AuEq

Exploration Summary for the Don Julio Project

The Don Julio Cluster of porphyry targets covers an area of approximately 10 x 12 km (120 km sq.). The understanding of the geology and mineral potential of this large area required various years of exploration and the construction of various kilometres of roads and extensive geological, geochemical, and geophysical work, including:

3,100m drilling in 2018 (funded by Sable)
12,717m drilling 2022-2025 (funded by South 32)
450 line-km Magnetic survey
25 line-km IP survey
3,029 rock samples
1,085 terraspec samples
1,458 soil samples
242 talus samples
35 geochronology samples
Extensive geological, alteration, and structural mapping throughout the property

Sable’s Don Julio property (69,350 hectares) is situated along the highly endowed Central Andes Miocene Mineral Belt, which contains large Cu-Au (Mo, Ag) porphyry mineral centers, including the Vicuña, Los Azules, Altar, and El Pachon porphyry district. Sable plans to use its in-house porphyry exploration expertise and extensive Don Julio’s database to leverage advanced targeting and follow-up drilling at this Tier One exploration asset.

SAMPLE PREPARATION AND QA/QC

Sample preparation for projects in Argentina is carried out by ALS Minerals, at its facility located in Mendoza with analyses carried out at their laboratory in Lima, Peru. Sample preparation includes drying in an oven at a maximum temperature of 60°C, fine crushing of the sample to at least 70% passing less than 2 mm, sample splitting using a riffle splitter, and pulverizing a 250 g split to at least 85% passing 75 microns (code PREP-31). The samples contained in this news release were analyzed by methods Au-AA24 (Fire Assay Fusion and Atomic Absorption Spectrometry finish) and ME-MS61 (Four Acid Digestion with Mass Spectrometry finish); the latter one includes 48 elements (Al, Ag, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, Ge, Hf, In, K, La, Li, Mg, Mn, Mo, Na, Nb, Ni, P, Pb, Rb, Re, S, Sb, Sc, Se, Sn, Sr, Ta, Te, Th, Ti, Tl, U, V, W, Y, Zn, Zr). Both digestion methods dissolve most minerals but not all elements are quantitatively extracted in some sample matrices. ALS additionally collects a subsample from the coarse reject to be analyzed by Terraspec; spectral data is sent to AISIRIS Australia to be processed and interpreted.

Control samples (standards, blanks, and duplicates) are inserted systematically, and their results evaluated according to the Company protocols.

QUALIFIED PERSON

Luis Arteaga M.Sc. P.Geo., Vice President Exploration, is the Company's Qualified Person as defined by NI 43-101. He has reviewed and approved the technical information in this news release.

ABOUT SABLE RESOURCES LTD.

Sable is a well-funded junior grassroots explorer focused on the discovery of Tier-One precious metal and copper projects through systematic exploration in endowed terranes located in favorable, established mining jurisdictions. Sable’s focus is developing its large portfolio of Greenfields projects to resource level. Sable is actively exploring the San Juan Regional Program (163,969 ha) incorporating the Don Julio, El Fierro, and Cerro Negro projects in San Juan Province, Argentina and the Copper Queen (15,133 ha), Copper Prince (3,980 ha), and Core Mountain (1,925 ha) properties in British Columbia.

For further information, please contact:

Ruben Padilla, President & CEO at ruben.padilla@sableresources.com or +1 (520) 488-2520

Related link: sableresources.com

Neither the TSX Venture Exchange nor its Regulation Services Provider, as that term is defined in the policies of the TSX Venture Exchange, accepts responsibility for the adequacy or accuracy of this release.

CAUTION REGARDING FORWARD-LOOKING STATEMENTS

Certain statements contained in this press release constitute forward-looking information. These statements relate to future events or future performance. The use of any of the words "could", "intend", "expect", "believe", "will", "projected", "estimated" and similar expressions and statements relating to matters that are not historical facts are intended to identify forward-looking information and are based on Sable’s current belief or assumptions as to the outcome and timing of such future events. Actual future results may differ materially. Although such statements are based on reasonable assumptions of Sable’s management, there can be no assurance that any conclusions or forecasts will prove to be accurate.

While Sable considers these assumptions to be reasonable based on information currently available, they may prove to be incorrect. Forward-looking information involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. Such factors include risks inherent in the exploration and development of mineral deposits, including risks relating to changes in project parameters as plans continue to be redefined, risks relating to variations in grade or recovery rates, risks relating to changes in mineral prices and the worldwide demand for and supply of minerals, risks related to increased competition and current global financial conditions, access and supply risks, reliance on key personnel, operational risks, and regulatory risks, including risks relating to the acquisition of the necessary licenses and permits, financing, capitalization and liquidity risks.

The forward-looking information contained in this release is made as of the date hereof, and Sable is not obligated to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, except as required by applicable securities laws. Because of the risks, uncertainties and assumptions contained herein, investors should not place undue reliance on forward-looking information. The foregoing statements expressly qualify any forward-looking information contained herein.

¹ Mineral resources from the Chita and Chinchillones projects have been taken from Minsud’s website - https://minsud.com/our-project/

² Drill intercepts from the Don Julio project have been published in multiple press releases from 2022 to 2024, including:

Photos accompanying this announcement are available at

https://www.globenewswire.com/NewsRoom/AttachmentNg/f88b28d3-92c8-4f69-a312-a5298d642f6e

https://www.globenewswire.com/NewsRoom/AttachmentNg/dcddcb1a-9aa7-459d-983a-f0e731c9c8ed

Figure 1

On the left, a map showing the known extension of the Central Andes Miocene Mineral Belt in Argentina’s San Juan Province and known ore deposits, including Sable’s projects and the emerging Chita porphyry district. On the right, deposits and targets of the Chita district are highlighted, in relation to the properties of Sable and Minsud (1).

Figure 2

Plan view of the extent of the Don Julio lithocap and the locationof the La Gringa and Morro porphyry occurrences.

Legal Disclaimer:

EIN Presswire provides this news content "as is" without warranty of any kind. We do not accept any responsibility or liability for the accuracy, content, images, videos, licenses, completeness, legality, or reliability of the information contained in this article. If you have any complaints or copyright issues related to this article, kindly contact the author above.