Goldarc Resources Ltd (ASX:GA8) High-Grade Bonanza Gold Confirmed over 5 Kilometres at Niagara

28 April 2026

Price Sensitive Announcement $

Highlights:

• RC infill drilling returns exceptionally high-grade gold from all five Niagara prospects (Orion, Sapphire, Eclipse, Justice, Euroa), confirming a coherent, multitarget gold system across 5km Niagara trend.
• 2026 MMS RC program demonstrated a materially larger and higher-grade system
  than previously understood.
• Multiple high-grade intercepts results including:

  o 8m @ 66.76g/t Au from 101m including 1m @ 130.00g/t Au from 101m and 1m @ 363.70g/t Au from 102m in hole 26SPRC014 (Sapphire)

  o 2m @ 20.18g/t Au from 85m including 1m @ 33.00g/t Au from 86m in hole 26SPRC016 (Sapphire)

  o 3m @ 52.58g/t Au from 111m including 1m @ 145.00g/t Au from 112m in hole 26ORRC009 (Orion)

  o 2m @ 47.92g/t Au from 42m including 1m @ 90.20g/t Au from 42m in hole 26JURC006 (Justice)

  o 4m @ 9.43g/t Au from 46m including 1m @ 21.40g/t Au from 46m in hole 26ECRC004 (Eclipse)

• 85-hole, 5,748m program funded through the MMS Equity for Drilling Services Agreement.

Overview:

GoldArc Resources Limited (ASX:GA8) reported high-grade gold assay results from its recently completed Reverse Circulation (RC) drilling program at the Niagara Gold Deposits, within the Company’s Leonora South Gold Project. The 85-hole, 5,748m program, 100% funded through the Equity for Drilling Services Agreement with Mineral Mining Services Pty Ltd (‘MMS’) has returned bonanza-grade intercepts across five prospects, potentially identifying Niagara as a high-grade, multi-deposit production hub. The Niagara deposits were previously mined as shallow open-pit operations in the early 1990s at US$300-400/oz. At that time, open-cut mining focused on accessible near-surface ore. These results materially expand the scale and economic case for the Niagara system.

Niagara Gold Deposit RC Drilling Results Verify Exceptionally High-Grade Gold System

Niagara Gold Deposits comprising Orion, Sapphire, Eclipse, Euroa and Justice, are situated within GoldArc’s Leonora South Gold Project, in the historic Kookynie Goldfields approximately 60km south of Leonora. The Niagara system hosts a combined JORCcompliant MRE of 48,000oz @ 2.2g/t Au (announced 28 May 2024) at the Orion and Sapphire deposits. Prior to GoldArc’s ongoing exploration activities, the deposits had not been systematically drilled to depth and along trend at scale.

The same gold-bearing structure that hosts Orion and Sapphire systems (quartz veining within the Niagara Gabbro Complex) controls mineralisation along approximately 5km-long Niagara trend (workings). This provides a clear geological analogue and a compelling case for resource consolidation across the Leonora South hub.

The MMS-funded program, comprising 5,748m across 85 RC holes at Niagara Gold Deposits, was designed to advance resource definition and optimisation at the current high gold price. The program returned numerous high-grade intercepts across the five deposits over 5km, demonstrating the depth and lateral scale of the system (Figure 1). See Table 1 for a list of significant intercepts.

Company Notes:

GoldArc Resources Managing Director, Paul Stephen commented: ”The result from hole 26SPRC014 — 8 metres at 66.76 grams per tonne, including a 1-metre interval at 363.70 grams per tonne — is the kind of intercept that stops you in your tracks. What excites me most is that this is not a single-deposit story: we are seeing bonanza grades from five separate deposits across a 5-kilometre trend. That is a potential multi-deposit production hub — and with MMS funding 100% of the development pathway, we can move directly from these results into an updated pit optimisation and mine design. Niagara was last mined at $300 an ounce. At today’s gold price, the scale of the opportunity here is potentially significant.”

Full ASX Announcement: GoldArc Resources Ltd ASX Announcement