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TARGET #2

Arco de
Oro

Arco de Oro is a prominent target within the Salvadora Property, characterized by multi-kilometre epithermal veining, extensive artisanal workings, and consistent high-grade gold mineralization at surface and depth.

KEY HIGHLIGHTS

  • Multi-vein epithermal system with gold-rich outcrops and extensive surface workings

  • 2.5 km of confirmed strike with potential to extend to 5+ km along trend

  • Five holes drilled to date — all have returned strong gold intercepts

  • Recent drilling confirmed vertical mineralization to at least 300 metres

  • Latest assays include:

    • 23.3 m @ 4.8 g/t Au (incl. 4.0 m @ 17.95 g/t Au)

    • 9.7 m @ 4.4 g/t Au (incl. 1.4 m @ 12 .2 g/t Au)

  • IP survey reveals moderate to strong chargeability anomaly, coinciding with gold zones and open to the northwest

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INVESTOR TAKEAWAY
Cerro Blanco now transitions from a promising geophysical and geochemical target to a confirmed discovery. The scale, grade, and continuity observed in the first drill hole support aggressive follow-up drilling and significant upside potential.

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ARCO DEO ORO 2024-2025 DRILL PROGRAM

High-Grade Gold Confirmed Over Multi-Kilometre Trend

Initiated a 3-hole drill program at Arco de Oro in December 2024. The goal was to step out from historical intercepts and test the expanding multi-vein epithermal system identified through surface work and IP.​

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ARCO DE ORO INITIAL DRILLING SUMMARY (2016 - 2022)

Foundation for Expansion

Five diamond drill holes completed prior to 2025 confirmed consistent high-grade gold mineralization across multiple vein sets, establishing an 800 m mineralized corridor with vertical continuity to at least 290 m. These results validated San Lorenzo’s exploration model and directly informed the 2024/2025 program, which extended the strike to 1.3 km and confirmed significant expansion potential to the northwest.

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ARCO DE ORO DRILL PROGRAM FINDINGS
(2025-2025)

Demonstrating Scale, Continuity & High-Grade Gold Mineralization

KEY HIGHLIGHTS

  • High-grade gold intercepts confirmed over 1.3 km of strike

  • Vein system remains open in all directions with strong IP correlation

  • SAL 01-25 and SAL 02-25 intercepted multiple gold-bearing zones

  • SAL 03-25 intersected fault-disrupted zone—further fieldwork underway

  • Chargeability anomaly strengthens along trend, supporting continued expansion

  • Every hole drilled at Arco de Oro to date has returned at least one significant gold intercept

“These results confirm Arco de Oro’s scale and consistency as a robust high-grade gold system. The convergence of epithermal veins along the strengthening IP anomaly points to meaningful resource potential.”– Terry Walker, VP Exploration

 

“Arco continues to validate our model with every drill campaign. This large, high-quality gold system is one of five exciting targets within our Salvadora property.”– Al Kroontje, CEO

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TARGET LOCATION

Epithermal Gold Corridor Anchored by Surface Workings & IP Anomalies

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Arco de Oro sits in the southwestern corridor of the Salvadora Property, spanning a 5 km trend marked by artisanal workings, gold-rich surface exposures, and a strengthening IP anomaly. Recent drilling confirmed vein convergence and extended mineralization to the northwest.


EXPLORATION NOTES

  • Near-continuous artisanal workings confirm 5 km of structurally controlled mineralization

  • Consistent high-grade gold values from surface sampling

  • Multiple exploration phases since 2015, including soil/rock sampling, IP surveys, and drilling

  • March–April 2025 drilling extended strike by 250 m and validated IP targeting

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INVESTOR NOTES

  • Arco de Oro’s accessible topography and strong surface expression allow efficient targeting and low-cost follow-up

  • Drilling confirms continuity of high-grade mineralization along strike and at depth

  • Upcoming IP expansion and step-o ut drilling will focus on the open northwest corridor—an area of known surface workings and geophysical support

IP SURVEY CORRELATION & EXPANSION POTENTIAL

Chargeability Anomaly Aligns with High-Grade Gold Intercepts

A 2023 IP survey outlined a strong chargeability anomaly aligning with high-grade intercepts—supporting the model of converging epithermal veins trending northwest.


EXPLORATION NOTES

  • IP anomaly begins ~150 m depth, open at depth and NW

  • Aligns with sulphide-hosted gold in Holes SAL 04-22 & SAL 01-25

  • SAL 01-25: 23.3 m @ 4.8 g/t Au, incl. 4.0 m @ 17.95 g/t Au

  • Geophysics and drilling suggest vein convergence and system growth NW

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INVESTOR NOTES

  • Every hole to date has returned gold mineralization

  • 5 km trend with large untested areas to the NW

  • IP-guided targeting supports further high-grade discovery potential

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HISTORICAL MINING & SURFACE WORKINGS

A Well-Mineralized Corridor with a Legacy of Artisanal Activity

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The map to the left outlines the locations of extensive historical mine workings within the Arco de Oro trend.


EXPLORATION NOTES

  • Multiple small-scale workings, adits, and trenches suggest long-standing local knowledge of gold and copper mineralization.

  • Sampling from these areas confirms the presence of gold and copper-enriched zones.

  • The Santa Cecilia adit and surrounding workings illustrate the scale and accessibility of the system, supporting the case for broader development.

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SUMMARY & NEXT STEPS

Consistent High-Grade Results Confirm a Robust, Expanding System

San Lorenzo’s drilling continues to validate Arco de Oro as a large, robust epithermal gold system. With consistent high-grade intercepts, expanding strike length, and strong geophysical support, the target presents a compelling near-term discovery opportunity.


KEY HIGHLIGHTS

  • 1.3 km of confirmed strike with gold mineralization to depths of 300+ metres

  • SAL 01-25: 23.3 m @ 4.8 g/t Au, incl. 4.0 m @ 17.95 g/t Au

  • SAL 02-25: 4.4 m @ 6.52 g/t Au, incl. 1.2 m @ 9.54 g/t Au

  • All drill holes to date have returned at least one significant gold intercept

  • Vein convergence model supported by IP anomalies and surface mapping

  • Remaining 2.5 km of untested NW trend shows strong surface workings and geophysical signals

  • Target remains open in all directions

​NEXT STEPS

  • Expanded IP survey to refine targets across the NW extension

  • Follow-up drilling along untested strike and to greater depths

  • Complete structural analysis of SAL 03-25 and plan offset drilling

  • Coordinate drill campaigns at Arco de Oro, Cerro Blanco, and Tres Amigos as part of the broader Salvadora advancement

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CONTACT US

For more information, investment inquiries, or to join our mailing list, please reach out.

SUBSCRIBE TO OUR MAILING LIST

(TSXV: SLG | OTC: SNLGF)

ADDRESS

San Lorenzo Gold Corp.
Suite 700 – 903 – 8th Ave S.W.
Calgary, AB, Canada T2P 0P7

EMAIL

Al Kroontje: al@slgold.ca
Terence Walker: twalker@goldenrock.cl
John Aihoshi: jaihoshi@sanlorenzogold.com

ACUITY ADVISORY

Jeff Wilson: jwilson@acuityadvisorycorp.com
Roger Blair: rblair@acuityadvisorycorp.com

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