San Lorenzo Reports Final Assay Results from Hole SAL 10-25 with Drilling Ending in Porphyry Style Mineralization at the Arco de Oro Target
(TheNewswire)
CALGARY / TheNewswire /June 4, 2026 / San Lorenzo Gold Corp.("San Lorenzo" or the "Corporation") (TSXV: SLG) is pleased to providethe remaining assay results from Hole SAL 10-25 on the “San Juan”northwest extension of the Arco de Oro target. Full assay resultsfrom Hole SAL 10–25 - that already included 102.3 metres of 1.33 g/tgold – now include multiple additional deeper intercepts throughoutthe 574.0 metre drill hole including 52.6 meters of 1.67 g/t gold,48.0 metres of 0.91 g/t gold and ending in mineralization of 65.0metres of 0.81 g/t gold. Results are presented below.
Hole SAL 10-25 (and Hole SAL 09-25) were 3.9 km step-outs from SanLorenzo’s previous “core-zone” drilling at Arco de Oro. Theholes were designed to test the significant IP anomaly evident on IPline D8 – part of additional IP data acquired during the summer of2025. Importantly, both holes bottomed in porphyry style alteration,with the mineralization at the bottom of holes SAL 10-25 and SAL 09-25establishing a footprint exceeding 400 metres in width.
Terence Walker, San Lorenzo’s VP of Exploration, commented: “It isgratifying – and exciting - that the mineralization that started atapproximately 84 metres continued right to the bottom of hole 10 whichwas drilled to 574 metres. The porphyry style mineralization, withgrade, that was observed to the bottom of the hole reinforces mybelief that we are in a significant system at Arco de Oro. Thesystem appears much larger than suggested by our early efforts at Arco– efforts that were focused on the shallower upper portion of theepithermal system that extends to surface. With these holes, itappears that we have penetrated the upper gold-rich section of amineralized porphyry copper-gold system. Immediate follow-up drillingis required to delineate the intrusive complex that hosts the systemdiscovered in these holes”.
Mr. Walker continued: “Visual indications from the SAL 10-25 coreindicate that potassic alteration continues to strengthen and dominatetowards the bottom of the hole containing significantmulti-directional pyrite-chalcopyrite rich veins within essentiallydioritic intrusives and dykes indicating multi-episodic mineralizationevents in a gold-rich porphyry copper-gold setting”.
Al Kroontje, San Lorenzo’s CEO commented: “It shouldn’t beforgotten that IP line D8 hosts additional chargeability anomaliesthat must also be drilled. If they prove out, the system has thepotential to host significant width in addition to strike that mayexceed 6 km in length. I am pleased that with the additional capitalavailable to us at San Lorenzo, we will expand our exploration effortsto include testing numerous IP anomalies that we’ve known about formany years – anomalies identified in various IP programs that SanLorenzo undertook between 2012 and 2018”.
Table 1: SAL 10-25 Assay Results
Hole | Sector | Intercept | From | To | Width(m) | Au g/t | Ag g/t | Cu % |
| SAL 10 - 25 | Arco De Oro | A | 84.3 | 112.0 | 27.7 | 0.78 | 0.3 | 0.04 |
B | 132.0 | 145.8 | 13.8 | 1.39 | 0.3 | 0.10 | ||
C | 152.7 | 255.0 | 102.3 | 1.33 | 0.3 | 0.09 | ||
including | 152.7 | 166.0 | 13.3 | 2.21 | 0.3 | 0.12 | ||
including | 184.0 | 217.7 | 33.7 | 1.48 | 0.3 | 0.11 | ||
D | 265.0 | 295.0 | 30.0 | 1.24 | 0.4 | 0.09 | ||
E | 310.4 | 363.0 | 52.6 | 1.67 | 0.3 | 0.13 | ||
including | 314.0 | 330.0 | 16.0 | 2.29 | 0.3 | 0.15 | ||
F | 373.0 | 383.0 | 10.0 | 0.74 | 0.7 | 0.07 | ||
G | 397.0 | 445.0 | 48.0 | 0.91 | 0.8 | 0.08 | ||
H | 457.0 | 473.0 | 16.0 | 0.71 | 1.1 | 0.07 | ||
I | 483.0 | 503.0 | 20.0 | 0.51 | 1.6 | 0.05 | ||
J | 509.0 | 574.0 | 65.0 | 0.81 | 2.0 | 0.07 | ||
including | 541.8 | 556.0 | 14.2 | 1.76 | 7.3 | 0.16 |
Mineralization remains open at depth
Note 1: results for hole SAL10-25, from surface to a depth of 348 metres, were previously reportedby San Lorenzo on May 8, 2026. The results contained in this releasethat are below 348 metres in depth are newly received.
Figure 1: Section across a portion of IP line D8indicating the location of Holes SAL 10-25 and SAL 09-25 depicting themineralized intercepts obtained.
Note 2: SAL 10-25 terminated in mineralizationat 574 m (65 m at 0.81g/t Au, 2.0 g/t Ag & 0.07% Cu).
Table 2: Individual assay results of intercept 310.4 m- 363 m showing grade continuity typical of porphyry stylemineralization.
Hole | From | To | Width(m) | Au g/t | Ag g/t | Cu ppm |
SAL-10-25 | 310.42 | 312.00 | 1.58 | 1.53 | 0.3 | 1159 |
312.00 | 314.00 | 2.00 | 1.46 | 0.2 | 1109 | |
314.00 | 316.00 | 2.00 | 1.86 | 0.4 | 1259 | |
316.00 | 318.00 | 2.00 | 2.99 | 0.2 | 1890 | |
318.00 | 320.00 | 2.00 | 3.23 | 0.3 | 1920 | |
320.00 | 322.00 | 2.00 | 3.79 | 0.6 | 2100 | |
322.00 | 324.00 | 2.00 | 1.38 | 0.2 | 1045 | |
324.00 | 326.00 | 2.00 | 1.65 | 0.4 | 1248 | |
326.00 | 328.00 | 2.00 | 1.66 | 0.3 | 1252 | |
328.00 | 330.00 | 2.00 | 1.74 | 0.2 | 1319 | |
330.00 | 332.00 | 2.00 | 1.23 | 0.2 | 935 | |
332.00 | 334.00 | 2.00 | 1.47 | 0.3 | 1110 | |
334.00 | 336.00 | 2.00 | 1.71 | 0.2 | 1295 | |
336.00 | 338.00 | 2.00 | 1.33 | 0.2 | 1009 | |
338.00 | 340.00 | 2.00 | 1.59 | 0.4 | 1208 | |
340.00 | 342.00 | 2.00 | 2.13 | 0.3 | 1525 | |
342.00 | 344.00 | 2.00 | 1.99 | 0.2 | 1510 | |
344.00 | 346.00 | 2.00 | 2.68 | 0.5 | 2029 | |
346.00 | 348.00 | 2.00 | 2.71 | 0.6 | 2022 | |
348.00 | 350.00 | 2.00 | 1.28 | 0.4 | 1164 | |
350.00 | 352.00 | 2.00 | 1.16 | 0.4 | 1052 | |
352.00 | 354.55 | 2.55 | 1.06 | 0.2 | 965 | |
354.55 | 357.11 | 2.56 | 0.824 | 0.7 | 749 | |
357.11 | 359.00 | 1.89 | 0.913 | 0.3 | 830 | |
359.00 | 361.00 | 2.00 | 0.205 | 0.3 | 184 | |
361.00 | 363.00 | 2.00 | 0.172 | 0.4 | 156 |
Note 3: Results above 348 metresin this intercept were previously reported by San Lorenzo May 8, 2026.
Additional Assays
San Lorenzo has not yet received assay results from theremaining six holes already drilled at the Arco de Oro target. Whileassay turn-around times remain frustrating, San Lorenzo is hopefulthat, with the onset of winter in the southern hemisphere, some of the“large scale drilling programs in the high Andes” will wind downwhich may help improve assay turn-around times. San Lorenzo remainscommitted to providing stakeholders with regular updates as assayresults become available.
Drilling
San Lorenzo has submitted the permitting material forthe upcoming Phase 7 drilling program at Salvadora. Pad constructionfollowed by rig mobilization is expected to begin imminently.
Qualified Person
The scientific and technical information contained inthis news release has been reviewed and approved by Terence Walker,M.Sc., P. Geo., the VP of Exploration of San Lorenzo who is a"qualified person" within the meaning of National Instrument43-101.
Testing Procedures
Samples consisting of 50% of the HQ core are deliveredto the ALS Laboratories in Copiapó by San Lorenzo staff forpreparation which consists of drying and crushing to a 2 mm mesh andthen pulverized. The sample material is then delivered to ALS’sfacilities in Lima, Peru for gold analysis using the fire assaymethod. Samples were also analyzed by aqua-regia digestion toanalyze for other elements including Ag and Cu. San Lorenzo notesthat the correlation between sample intervalsand true widths are unknown as the systems are still beingmodeled.
Drill Hole and Assay Data
Drill data, including individual assay results fromeach of the holes presented in this news release, will be madeavailable on San Lorenzo’s website: www.sanlorenzogold.ca under theSalvadora sub-heading “Drill Hole and Assay Data”.
About San Lorenzo
San Lorenzo is focused on advancing its flagship Salvadora propertylocated in Chile’s mega-porphyry belt. Drilling results atSalvadora - from 4 different targets so far - have convincedmanagement that several gold and copper enriched epithermal and/orporphyry style systems may be contained within the Salvadora property.
For further information, please contact:
Terence (Terry) Walker, VP Exploration
Email: twalker@goldenrock.cl
Ph: + 56 9 5179 5902
Or:
Roger Blair or Jeff Wilson, Acuity Advisory Corp.
Email: info@acuityadvisorycorp.com
Ph: +1 604 351 0025 or +1 604 837 5440
Or:
Al Kroontje
Email: al@slgold.ca
Ph: +1 403 607 4009
Neither the TSX Venture Exchange nor its RegulationServices Provider (as that term is defined in the policies of the TSXVenture Exchange) accepts responsibility for the adequacy or accuracyof this news release.
Cautionary Note Regarding Forward-LookingInformation
This news release may contain forward-lookinginformation that involves substantial known and unknown risks anduncertainties, most of which are beyond the control of SanLorenzo. All statementsincluded herein other than statements of historical fact are forward-looking information Such forward-looking information involves various risks anduncertainties. There can be no assurance that such information willprove to be accurate, and actual results and future events coulddiffer materially from those anticipated in such information. Anyforward-looking statements are made as of the date of this releaseand, other than as required by applicable securities laws, San Lorenzodoes not assume any obligation to update or revise them to reflect newevents or circumstances.
Copyright (c) 2026 TheNewswire - All rights reserved.
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