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Kainantu Resources Announces Airborne Geophysics Results: Confirms Prospectivity at Key Projects

Vancouver, B.C. – June 9, 2022 – Kainantu Resources Ltd. (TSX-V: KRL) (“KRL” or the “Company”), the Asia-Pacific focused gold mining company, is pleased to announce outcomes from the recently completed airborne geophysical survey conducted over both its KRL North and KRL South projects.

The completion of airborne geophysical surveying and analysis over the Kainantu region supports the highly prospective nature of the KRL tenement portfolio for porphyry Cu-Au and epithermal Au deposits (which is on trend with the successful K92 mine).

Highlights

Key highlights of the airborne geophysics programme include the following:

  • total area covered of 186 km² (involving over 1,000 line-kilometres) in survey by Expert Geophysics Ltd. (“EGL”);
  • advanced processing and modelling; with 3D inversion conductivity models, and magnetic susceptibility and magnetization vector models completed by Computational Geosciences Inc earlier this month – key findings below;

KRL North

  • two large magnetic anomalies in highly permeable structural environments identified to the south west and south east, both have been interpreted as possible porphyries;
  • the southwest body appears bound by a prominent highly conductive NE trending fault and is associated with a ring feature (in addition to peripheral precious and base metal mineralisation to the north and northwest);
  • the southeast body occupies a complex structural zone of prominent intersecting NE and NW faults, some highly conductive and appears associated with a recently identified zone of low temperature hydrothermal alteration and mineralisation in the Young Creek area;

KRL South

  • magnetic signatures indicate a possible offshoot from the main batholithic Elandora Porphyry complex occupying the center of the Tirokave ring feature;
  • appears to underly the largely phyllic altered area immediately west of the East Avaninofi Prospect and is consistent with skarn mineralisation mapped and sampled;
  • additional prospect identified at Mt. Yungateia north of the Tirokave area, a coincident conductivity/magnetic high which includes a strong/extensive conductivity high orientated SE towards  Tebeo Ridge; and
  • further regional targets of high prospectivity identified at KRL South – further analysis underway. 

Matthew Salthouse, CEO of KRL, commented: 

“The KRL airborne geophysics survey and subsequent analysis has proven to be a successful venture for the Company, confirming the highly prospective nature of both KRL North and KRL South; supporting ongoing work at the projects. In addition, the survey has also identified other targets and prospects in the region.”

Background

Located along the world renowned Kainantu Transfer Structure, KRL holds two highly prospective projects, KRL North and KRL South, in a district associated with highly successful mining projects.

KRL North

At KRL North, given proximity to the K92 mine, the Company has continued field work and studies to build confidence on the structural similarities and potential trend between the project and the Bilimoia Mineral Field (inclusive of two significant vein systems at Maniape and Arakompa only 2 to 4 km outside of the SE corner of KRL North).

In 2021, a mapping and sampling programme was conducted with the objective of assessing whether such enhanced structural permeability extends into KRL North. Results were extremely encouraging, with several altered and intrusive bodies observed and interpreted as associated with the Elandora Porphyry.  A ring feature observed on the southern border of KRL North was found to be underlain by an extensive outcrop of phyllic altered intrusive rocks which was considered to indicate potential porphyry style mineralisation at depth.

Initial analysis from the airborne geophysics program conducted by K92 also appears to demonstrate a NE linear zone of high conductivity trending towards KRL North, likely indicating throughgoing structures possibly associated with contained water and/or sulphide-bearing zones.  Further details are contained in KRL’s release of March 10, 2022.

KRL South

At KRL South, the Company’s initial focus has been around the Tirokave area, with three prospects identified for further investigation: East Avaninofi (where a 40 g/t Au sample was collected), Yaoro Ridge  and Tebeo Ridge.

The area is of interest has extensive outcrops identified within the Akuna Igneous complex, including scattered dykes and plugs of the Elandora Porphyry and intrusives associated with other successful projects in the region.

Trenching is currently underway at East Avaninofi and Yaoro Ridge, where the company continues to collect samples and undertake further mapping in preparation for potential delineation of drill targets.  With the area remaining highly prospective, KRL is also looking more broadly at other regional targets in KRL South.

Airborne Geophysical Survey   

As noted in the Company’s release of March 10, 2022, encouraging results and analysis have confirmed the Company’s views on the prospective nature of both KRL North and KRL South, justifying an airborne geophysical survey of the area.

KRL co-operated with other miners in the Kainantu region in Q4 2021/Q1 2022 to share resources to mobilise for airborne geophysical surveys over respective projects, with KRL having flown its survey in January-February 2022.

Airborne survey data was collected by EGL (who operate the Mobile Magneto Tellurics, or Mobile MT system). The area surveyed included all prospective areas of KRL North in addition to key areas of interest in and around the Tirokave area of KRL South (including the East Avaninofi and Yaoro Ridge prospects).  Figure 1 below displays the three blocks covered by the survey, totalling 186 km² (involving over 1,000 line-kilometres of survey). The apparent preliminary conductivity analysis from EGL is also presented in Figure 1.

Figure 1: Preliminary apparent conductivity mapping across the Kainantu Region

KRL NorthNorth BlockEL2558, EL2655533 line-km (97sq.km)
KRL SouthTirokave BlockEL2559, EL2650, EL2652263 line-km (43 sq.km)
KRL SouthOntenu BlockEL2660259 line-km (46 sq.km)

Survey lines for all three areas were flown in an E-W direction, at 200m spacing, with tie lines at right angles (N-S), every 2,000m. On completion of the survey in February 2022, EGL completed preliminary data processing and a final survey report was delivered in April 2022.

This data was then delivered to Computational Geosciences Inc. (“CGI”), of Vancouver, who completed advanced processing and modelling; with 3D inversion conductivity models, and magnetic susceptibility and magnetization vector models produced, after data clean-up using a proprietary Power Line Monitor algorithm (which only impacted the eastern part of KRL North). This final work was completed at the start of June and the Company can now report results through to the advanced processing and modelling stage.

 Geophysics Results

KRL North

Initial mapping of EGL-derived preliminary apparent conductivity at KRL North had identified a number of high conductivity areas such as the Southern Ring feature, the NE trending Ramu Gorge Fault, the SE corner of EL2655 (known as the Young Creek area) and several other discrete conductivity highs in the south of EL 2655. Figure 2 displays the conductivity pattern over the two exploration licences.

The relative proximity of the Arakompa and Maniape deposits to the apparent conductivity high underlying the southern ring feature area can be noted.

Figure 2: Initial apparent conductivity mapping of KRL North

The final processed conductivity and magnetization models prepared by CGI are set out in Figure 3 below, together with a brief description of the interpretations of each survey block – features of interest are annotated for clarity.

Two large, multi-component, magnetic anomalies interpreted as possible intrusive/extrusive complexes (N1 & N2) – either may be considered a source of mineralising fluids.

The previously identified southern ring feature centred on the triple junction of 3 leases (two held by KRL and one by K92) appears associated with the N1 anomaly and may represent an apophysy of a subjacent igneous body. In this regard, zoned hydrothermal alteration and mineralisation mapped and sampled by KRL to the north and, more recently, northwest of N1 are considered consistent with peripheral mineralisation commonly associated with porphyry style deposits.  

A deep-seated, magnetic and conductive, NE-trending linear structure termed the Ramu Gorge Fault (N3) is associated with N1, sub-parallel to the main Kainantu Transfer Fault trend, and several NW-trending magnetic (N4) and conductivity (N5) anomalies are interpreted as permeable structures. Intersections of these NW-trending structures with the Kainantu Transfer trend represent additional exploration targets (areas of enhanced hydrothermal fluid flow).

The recently identified Young Ck zone of low temperature alteration and mineralisation appears associated with the N2 anomaly which is located in a structurally permeable zone of cross-cutting dominantly NE and NW faults & fractures. Prominent NE to NNE trending lineaments shown transecting Akuna Igneous Complex rocks to the immediate southeast of this anomaly prompted KRL to apply for ELA 2755.

Conductive anomalies in the northeast of survey are shallow and interpreted as permeable sediments.

Figure 3: KRL North: A – Magnetic model (elevation -125m),
B – Conductivity model (elevation 175m) 

KRL South

At KRL South, the preliminary analysis by EGL at Yaoro Ridge, and north towards Tebeo, is shown to be underlain by a strong and extensive conductivity zone. The strong magnetic high in the center of the Tirokave Ring may indicate several multi-generational magnetic intrusive bodies forming the core of the complex.

The pattern of high conductivity anomalies adds confidence to the reliability of field data and processes in KRL’s predictions.

A strong and extensive conductivity high orientated NW from Tebeo Ridge to the Mt. Yungateia area also appears as a prominent feature, potentially indicating further prospects of hydrothermal alteration and mineralisation in the vicinity of work already underway around Tirokave.

In this regard, the Company has identified Mt. Yungateia as a newly identified prospect which appears underlain by coincident conductivity and magnetic highs.

Figure 4: Preliminary Apparent Conductivity at KRL South – Tirokave Block

In relation to the further advanced analysis by CGI at KRL South, an extensive resistive zone (T1) could represent the batholithic Elandora Porphyry igneous complex largely occupying the center of the Tirokave ring feature, with a small apophysy on its northern margin (T2) situated on the western side of East Avaninofi Prospect, an area displaying extensive phyllic alteration. The latter anomaly is magnetic and may represent a skarn target (small skarn occurrences are commonly noted throughout the prospect areas) and/or an underlying porphyry.

A resistive zone with a conductive core (T3) underlying Mt. Yungateia represents a possible porphyry target. A slightly deeper NW-trending linear conductive zone (T4, parallel to the Kora Vein-trend) is an associated structural target of interest. Hydrothermally-altered porphyritic rocks, with quartz-sulphide veins, along with skarns, have been observed in this area.

Small magnetic features (T5 & T6) are associated with weak, linear N- to NNW-trending conductors.

Figure 5: Tirokave: A – Magnetic model (1800m), B – Conductivity model (2000m),
C – Conductivity model (elevation 1600m)
  

Next Steps and Conclusions

KRL will continue analysis of data collected from the airborne geophysics programme, which has been extremely useful in supporting the Company’s views as to the highly prospective nature of KRL North and KRL South; while also identifying additional prospects and targets for further investigation at both.

The analysis, combined with ongoing field work, will support the Company’s programme to delineate drilling targets at KRL South; and potentially areas for further intensive efforts at KRL North.

In addition, the Company is currently reviewing the outcomes of the CGI analysis in relation to regional prospectivity and will provide a further update in the near future.

Qualified Person

The scientific and technical information disclosed in this release has been reviewed and approved by Graeme Fleming, B. App. Sc., MAIG, an independent “qualified person” as defined under National Instrument 43-101, Standards of Disclosure for Mineral Projects.

About Kainantu Resources (KRL)

Kainantu Resources ‘KRL’ is an Asia-Pacific focused gold mining company with three highly prospective gold-copper projects, KRL South, KRL North and the May River Project. All projects are located in premier mining regions in PNG. Both KRL North and KRL South show potential to host high-grade epithermal and porphyry mineralisation, as seen elsewhere in the high-grade Kainantu Gold District. The May River project is in close proximity to the world-renowned Frieda River Copper-Gold Project, with historical drilling indicating the potential for significant copper-gold projects. KRL has a highly experienced board and management team with a proven track record of working together in the region; and an established in-country partner.  KRL recently executed an agreement to acquire the Kili Teke project in the western highlands of PNG.

Enquiries:

Kainantu Resources
Matthew Salthouse, Chief Executive Officer (Tel: + 65 8318 8125)
Callum Jones, Corporate Development Co-ordinator (Tel: + 61 450 969 697)
Email: info@krl.com.sg

Investor Relations (Gemini Capital):;
Kevin Shum
Tel: +1 212 219 4670 (702)
Email: kevin@jeminicapital.com

For further information please visit https://kainanturesources.com/

Neither the TSX-V nor its Regulation Services Provider (as that term is defined in the policies of the TSX-V) accepts responsibility for the adequacy or accuracy of this release.  Disclaimer and Forward-Looking Information Mineralisation hosted on adjacent and/or nearby properties is not necessarily indicative of mineralisation hosted on the Company’s propertyThe data disclosed in this release relating to drilling results is historical in nature. Neither the Company nor a qualified person has yet verified this data and therefore investors should not place undue reliance on such data, and no representation or warranty, express or implied, is made by the Company, its affiliated companies, or any other person as to its fairness, accuracy, completeness, or correctness. This release contains forward-looking statements, which relate to future events or future performance and reflect management’s current expectations and assumptions. Such forward-looking statements reflect management’s current beliefs and are based on assumptions made by and information currently available to the Company. All statements, other than statements of historical fact, are forward-looking statements or information. Forward-looking statements or information in this news release relate to, among other things: formulation of plans for drill testing; and the success related to any future exploration or development programs. These forward-looking statements and information reflect the Company’s current views with respect to future events and are necessarily based upon a number of assumptions that, while considered reasonable by the Company, are inherently subject to significant operational, business, economic and regulatory uncertainties and contingencies. These assumptions include; success of the Company’s projects; prices for gold remaining as estimated; currency exchange rates remaining as estimated; availability of funds for the Company’s projects; capital, decommissioning and reclamation estimates; prices for energy inputs, labour, materials, supplies and services (including transportation); no labour-related disruptions; no unplanned delays or interruptions in scheduled construction and production; all necessary permits, licenses and regulatory approvals are received in a timely manner; and the ability to comply with environmental, health and safety laws. The foregoing list of assumptions is not exhaustive.  The Company cautions the reader that forward-looking statements and information involve known and unknown risks, uncertainties and other factors that may cause actual results and developments to differ materially from those expressed or implied by such forward-looking statements or information contained in this news release and the Company has made assumptions and estimates based on or related to many of these factors. Such factors include, without limitation: fluctuations in gold prices; fluctuations in prices for energy inputs, labour, materials, supplies and services (including transportation); fluctuations in currency markets (such as the Canadian dollar versus the U.S. dollar); operational risks and hazards inherent with the business of mineral exploration; inadequate insurance, or inability to obtain insurance, to cover these risks and hazards; our ability to obtain all necessary permits, licenses and regulatory approvals in a timely manner; changes in laws, regulations and government practices, including environmental, export and import laws and regulations; legal restrictions relating to mineral exploration; increased competition in the mining industry for equipment and qualified personnel; the availability of additional capital; title matters and the additional risks identified in our filings with Canadian securities regulators on SEDAR in Canada (available at www.sedar.com). Although the Company has attempted to identify important factors that could cause actual results to differ materially, there may be other factors that cause results not to be as anticipated, estimated, described, or intended. Investors are cautioned against undue reliance on forward-looking statements or information. These forward-looking statements are made as of the date hereof and, except as required under applicable securities legislation, the Company does not assume any obligation to update or revise them to reflect new events or circumstances.

Drill hole ONED26-007 returns 12 m at 3.1 g/t Au, including 1 m at 18.1 g/t Au, at the new Megabe target; two rigs turning at Ontenu NE within the Osena Project, with a porphyry test being prepared at Ontenu Central; surface exploration and drill-target definition advancing at the Anga Project, adjacent to K92 Mining’s operation; reconnaissance at May River secures community consent and site access

Vancouver, British Columbia – June 16, 2026 – South Pacific Metals Corp. (TSXV: SPMC; OTCQB: SPMEF; FSE: 6J00) (“SPMC” or “South Pacific Metals” or the “Company”) is pleased to report new high-grade gold drill results from its Ontenu NE project and to provide a corporate update across its portfolio of gold-copper exploration projects in Papua New Guinea (“PNG”). Drill hole ONED26-007, the first hole testing the new Megabe target at Ontenu NE, returned 12 m at 3.1 g/t Au, including 1 m at 18.1 g/t Au. The Company has two diamond drills turning at Ontenu NE, within the Osena Project on the southwest border of K92 Mining Inc.’s Kainantu Gold Mine, while drill targeting is being finalised at the adjacent Ontenu Central prospect; surface exploration and drill targeting are underway at the Anga Project (northeast of, and adjacent to, K92); and field work is restarting at May River following a recent reconnaissance visit that secured community consent and confirmed site access.

Executive Chairman, Michael Murphy, commented:

“This is an important stretch for SPMC. Two rigs are turning at Ontenu NE, where our first hole into the new Megabe target has returned high-grade gold, a porphyry test is taking shape at Ontenu Central, and we have completed a reconnaissance visit to May River that secured community consent and site access. We built this position deliberately, and this is the stage where years of groundwork start to show up in the drill core.”

Figure 1: SPMC exploration progress and H2 2026 outlook, showing work completed across the portfolio through 2025 and anticipated activity and news flow at the Ontenu NE, Ontenu Central, Anga, Kili Teke and May River projects. Sequencing and timing are indicative only and subject to change.

OSENA PROJECT – Active Drilling

Ontenu NE is the engine of the current campaign. Two rigs are now turning, with Exploration Manager Octavio Garcia overseeing the program. The Company has drilled both the Onki target and the Jorkol vein system and is currently drilling newly identified NW-trending structures at Megabe (between Onki and Jorkol). Assays from the first Megabe hole, ONED26-007, have now been received and are reported below; holes ONED26-008 (Jorkol) and ONED26-009B (Megabe) have recently been completed and are pending assay results.

New High-Grade Gold at the Megabe Target

  • New high-grade gold zone intersected at the Megabe target, in the corridor between the Jorkol and Onki prospects at Ontenu NE.
  • 12 m @ 3.1 g/t Au and 15.4 g/t Ag from 185 m downhole, including 1 m @ 18.1 g/t Au and 84 g/t Ag.
  • Mineralisation hosted in NW-SE-striking fault breccia within metasediments — a comparable geological host and orientation to K92 Mining’s nearby Kora-Judd operations.
  • The Megabe area is located at Otitapa Creek, a notable source of alluvial gold mined by local artisanal miners.
  • Two drill rigs continue to operate at Ontenu NE; a second Megabe hole, ONED26-009, has been completed and dispatched to the laboratory for assay.

Hole ONED26-007 was the first hole into the Megabe area, which lies within a package of interlayered metasediments and porphyry rocks, proximal to the Onki Diorite contact, and is transected by Otitapa Creek. The hole intersected a recently surface-mapped NW-SE structure in the hanging wall of the main Megabe structure and returned 1 m @ 18.1 g/t Au within 12 m @ 3.1 g/t Au. Other assays within the intercept include up to 1,462 ppm copper and 84 g/t silver. Reported intervals are downhole (core) lengths; based on the interpreted orientation of the host structure relative to the drill hole, true width is estimated at approximately 30% of the downhole interval, preliminary and subject to confirmation by further drilling. Mineralisation is dominantly gold and silver associated with sulphides (mainly pyrite) within a fault breccia zone. The hole was terminated at 198.8 m.

Figure 2: Cross-section through hole ONED26-007 at the Megabe target, Ontenu NE.

Table 1 – Assay results from ONED26-007

Hole_ID

From (m)

To (m)

Intercept (m)

Gold (g/t)

Silver (g/t)

Copper (ppm)

ONED26-007

140

158

18

0.24

3

83

ONED26-007

185

197

12

3.10

15

540

INCLUDING:

      

ONED26-007

185

186

1

18.10

84

153

ONED26-007

186

187

1

0.99

4

71

ONED26-007

187

188

1

0.11

3

109

ONED26-007

188

189

1

0.04

2

93

ONED26-007

189

190

1

2.97

5

126

ONED26-007

190

191

1

1.48

14

1462

ONED26-007

191

192

1

0.69

18

1371

ONED26-007

192

193

1

1.03

14

1347

ONED26-007

193

194

1

0.17

7

830

ONED26-007

194

194.4

0.4

5.47

14

0.5

ONED26-007

194.4

195.2

0.8

4.33

15

375

ONED26-007

195.2

196

0.8

3.58

11

641

ONED26-007

196

197

1

3.18

7

104

Intervals are downhole (core) lengths. True width is estimated at approximately 30% of the downhole interval and is preliminary.

Figure 3: Regional geology and drill plan at the Ontenu Project.

The Ontenu NE Target Areas

Ontenu NE is a single project area that contains several distinct drill targets along one mineralised corridor. To date the Company has reported drilling from three of these — Jorkol, Onki and, for the first time in this release, Megabe.

Jorkol — the western target. Hosts gold-silver mineralisation in structurally controlled zones; drilling to date has returned assays up to 3.16 g/t Au (holes ONED25-001 and ONED26-001, -004 and -005).

Onki — the north-eastern target, centred on the Onki Diorite. Carries copper-gold porphyry-style and higher-grade vein mineralisation; drilling to date has returned peak assays of 9.92 g/t Au and 2.35% Cu (holes ONED26-002, -003 and -006).

Megabe — the new central target reported in this release, in the corridor between Jorkol and Onki and transected by the gold-bearing Otitapa Creek. First-hole results (ONED26-007) returned 12 m at 3.1 g/t Au, including 1 m at 18.1 g/t Au.

All three targets sit within the same NW-SE structural corridor, which the Company interprets as analogous to the setting of K92 Mining’s nearby Kora-Judd system.

Table 2 – Drill hole details

Hole ID

Target

Easting

Northing

Elev (m)

Length (m)

Azimuth

Dip

Assay Status

ONED25-001

Jorkol

365,693

9,295,361

1,771

318.8

45

-61

Received Au+Full ME

ONED26-001

Jorkol

365,745

9,295,652

1,762

400.0

235

-57

Received Au+Full ME

ONED26-002

Onki

366,382

9,296,303

1,817

348.8

290

-55

Received Au+Full ME

ONED26-003

Onki

366,254

9,296,133

1,823

401.9

290

-55

Partial Received preliminary Au-Cu-Ag

ONED26-004

Jorkol

365,667

9,295,561

1,769

171.1

347

-55

Received Au+Full ME

ONED26-005

Jorkol

365,667

9,295,561

1,760

123.0

0

-55

Received Au+Full ME

ONED26-006

Onki

366,261

9,296,122

1,851

304.0

93

-55

Received preliminary Au-Cu-Ag

ONED26-007

Megabe

366,147

9,295,620

1,824

198.8

325

-55

Received preliminary Au-Cu-Ag for part of hole.

ONED26-008

Jorkol

365,670

9,295,560

1,760

167

7

-56

Pending assay

ONED26-009

Megabe

366,160

9,295,800

1,889

371

220

-59

Pending assay

Ontenu NE Drill Program Highlights to Date

(see news release dated May 20, 2026)

  • Gold mineralisation confirmed in 7 of 8 holes at Ontenu NE. Seven holes for 2,804 m completed within the wider Osena Project area on the Kainantu Transfer Zone, the same regional structural corridor that hosts K92 Mining’s producing Kainantu gold-copper mine.
  • Onki Zone, hole ONED26-006: 92 m @ 0.34 g/t Au from 67 m, including 2 m @ 5.74 g/t Au, 1.49% Cu and 35 g/t Ag from 119 m (peak re-assay of 9.92 g/t Au and 2.35% Cu over 1 m).
  • Jorkol Zone, hole ONED26-001:5 m @ 0.77 g/t Au, 0.14% Cu and 19 g/t Ag from 203.5 m, including a 0.5 m peak sample assaying 3.16 g/t Au, 0.62% Cu and 96 g/t Ag with 602 ppm Bi — the strongest bismuth signature of the program. Elevated Bi-Te with Au is a recognised indicator of intermediate- to high-sulfidation epithermal systems.
  • Wide low-grade halos surrounding both high-grade peaks, with multi-element pathfinder signatures (As, Sb, Bi, Te) consistent with the upper levels of such a system.
  • Geological evidence of an intact, vertically zoned hydrothermal system at Onki. Probable phreatic breccia overlying an intensely silicified horizon, interpreted as a silica cap above a preserved system, implying the productive levels of the system may sit at depth, intact and as yet untested.
  • Ontenu Central advancing in parallel: a 2 km zoned alteration footprint with a classic porphyry signature and a relatively shallow (~400 m) porphyry target. Recently identified NW-trending mineralised zones overlying the northern margin of the porphyry signature continue to indicate the potential for K92 Mining Kora-Judd-style structures in the Ontenu area.
  • Two rigs now active: continued drilling at Ontenu NE, with ONED26-007 (Megabe) reported above and holes ONED26-008 and ONED26-009B pending assay; holes ONED26-010 and ONED26-011 in progress; and additional holes planned.

CEO Timo Jauristo commented:

“Our new hole at the Megabe target returned 12 m at 3.1 g/t Au, including 1 m at 18.1 g/t Au, finding gold in another one of the NW trending structures, within a fault-breccia setting similar to K92 Mining’s nearby Kora-Judd system. Our maiden holes had already confirmed that the Ontenu area hosts gold-copper mineralisation within these NW-trending structures, and the multi-element pathfinders are pointing us deeper and along strike, toward where we’d expect the higher-grade mineralisation to sit. With two rigs turning, the assays and the alteration are telling the story and guiding us towards the better parts of the system. We are looking forward to commencing drilling at Ontenu Central — where there are near-surface epithermal targets as well as the makings of a porphyry target at depth.”

Ontenu Central may be the most important target of the campaign. Partially completed detailed geological mapping has outlined three NW-trending mineralised zones overlying and along the northern margin of a 2 km zoned porphyry alteration footprint. The current program contemplates a minimum of three drill holes as a first-pass test of these new NW-trending trends. The Company is also planning a first hole of approximately 600 m to test the porphyry target, the top of which is interpreted at a relatively shallow depth of around 400 m.

The Company is conducting detailed geological mapping over both the Ontenu NE and Ontenu Central projects and has planned a drone-based LiDAR survey across the broader Ontenu area to further tighten the geological understanding and drill targeting.

ANGA PROJECT – Surface Exploration

SPMC’s Anga Project borders K92 Mining’s operations to the northeast, 1.5 km east of K92’s plant and 3 km along strike from K92’s Arakompa–Maniape vein systems. Within a 4 × 3 km footprint, coincident gold-in-soil and magnetic-low geophysical anomalies define prospective structural corridors. Mapping and rock-chip sampling at Golkona are continuing with the objective of locating the sources of these large soil anomalies and defining drill targets to test them. Previously reported Au-Cu-As-Ag soils anomalies up to 1,080 ppb Au, 3,397 ppm Cu, 2,160 ppb Ag and nearby stream-sediment pan concentrates including 281.8 ppm Au, 79.1 ppm Au, 64.9 ppm Au, and 51.6 ppm (see news release dated October 14, 2025). The Company recently commenced first-pass reconnaissance and sampling, which will continue.

Figure 4: Anga Project geophysics and soil geochemistry compilation, showing apparent conductivity (709 Hz), Au-in-soil anomalies, and mapped vein and shear structures along the SPMC-K92 property boundary. Target prospects (Golkona, Golkona South, Binano, Satup) and surface rock-chip results are annotated.

KILI TEKE PROJECT – 4.2 Moz AuEq Inferred Resource

SPMC’s wholly-owned Kili Teke Project in Hela Province hosts an NI 43-101 Inferred Mineral Resource of 4.2 Moz AuEq* (effective 18 November 2022), comprising 1.81 Moz Au, 802 kt Cu and 40 kt Mo, and remains the largest defined resource in the Company’s portfolio. Prior operator Harmony Gold completed extensive drilling and metallurgical testwork at the project; results outside the current resource include 7.8 m @ 12.98% Cu plus 11.75 g/t Au, with surface samples up to 27.5% Cu (see news release dated October 1, 2024).

* Au-equivalent contained ounces based on equal recoveries of Au and Cu only and prices of US$3,300/oz Au and US$4.45/lb Cu. Preliminary metallurgical testwork by Harmony Gold shows gold reporting to copper minerals, indicating the two can be co-recovered. Molybdenum is not included in the Au-equivalent figure.

MAY RIVER PROJECT – Data Compilation & Validation

May River is a district-scale gold-copper system adjacent to PanAust’s Frieda River deposit in PNG’s East Sepik region. Historical drilling at the project includes a copper-gold intercept of 19 m @ 11.47% Cu, 2.17 g/t Au (hole 010UF97) and gold intercepts of 109 m @ 1.53 g/t Au, 57 m @ 1.1 g/t Au and 58 m @ 1.5 g/t Au at the Skirasia prospect (holes 006SK98, 001SK98 and 011SK98), highlighting the scale and grade potential the Company is now working to advance (see news release dated October 30, 2024).

SPMC’s technical team recently completed a reconnaissance visit to the project, which set out to secure community consent for exploration, locate historical drill collars at the Skirasia prospect, and confirm site access — and achieved all three. Communities within proximity to the work area were consulted and briefed on the program, welcoming the Company to begin work.

At Skirasia, a target located within the broader Skygate Cu-Au Porphyry-Epithermal Trend, the team relocated four historical drill sites (one cemented collar and three drill pads) and recorded eight historical trenches and soil-sampling sites, with further historical holes still to be relocated. Field observations during the visit included active local alluvial mining, diatreme breccia, and highly deformed calcareous schist with secondary copper staining in creek float.

Access to the remote site was confirmed, and operational contacts were established with the PNG Defence Force, police, and PanAust at Frieda River. The reconnaissance positions May River for a renewed, community-supported exploration program, with planning for the Company’s first phase of exploration underway.

Figure 5: May River Project regional tenement map showing SPMC tenement boundaries over regional topography, prospect and target locations, historical drill-hole intercepts (including 010UF97: 19 m @ 11.47% Cu, 2.17 g/t Au and 006SK98: 109 m @ 1.53 g/t Au), existing and proposed access, and PanAust’s Frieda River deposit and proposed open pit to the southeast.

The Company will report further results from its ongoing drilling and exploration programs as they are received and reviewed.

Surface assay values referenced above are from selective rock-chip, grab and stream-sediment samples; such samples are selective by nature and are not necessarily representative of the mineralisation hosted on the Company’s properties.

Quality Assurance and Quality Control

All drill holes are logged on site by the Company’s geology team. Drill core (PQ or HQ) is half-cut, with samples secured and shipped to Intertek Laboratory in Lae, Papua New Guinea. Gold is assayed by 50 g fire assay with AAS finish (FA50/AA); copper and silver are assayed by 3-acid digest with AAS finish (PGGA03) at Intertek Lae (“preliminary” in Table 2 above). Sample pulps are subsequently sent to Intertek in Perth, Western Australia for multi-element ICP-MS analysis using a 4-acid digest (4A/MS) (“Full ME” in Table 2 above). Two certified reference materials (standards), one blank and one duplicate are inserted within each batch of 100 samples to monitor laboratory performance.

Qualified Person

The scientific and technical information disclosed in this news release is compiled by Company geologists and consultants and reviewed and approved by Darren Holden, BSc(Hons) (Geology), PhD, FAusIMM, a “Qualified Person” as defined in National Instrument 43-101 *Standards of Disclosure for Mineral Projects*. Dr. Holden is a Technical Advisor to the Company.

Marketing Agreement

The Company is providing supplemental disclosure to its news release dated June 5, 2026, in which it announced that it had entered into an online marketing agreement dated June 5, 2026, with i2i Marketing Group, LLC (“i2i”), pursuant to which i2i will provide corporate marketing and investor awareness services to the Company, including, but not limited to, content creation management, author sourcing, project management and media distribution (the “Agreement”).

The Company had agreed to an initial creation and media budget of US$300,000 (the “Initial Media Budget”) with services contemplated to commence on or about June 12, 2026, and continue until the Initial Media Budget had been fully expended. In order to comply with the policies of the TSX Venture Exchange, the Agreement has been amended to provide that the Initial Media Budget will cover a period of four months, with services contemplated to commence on or about June 22, 2026, subject to acceptance by the TSX Venture Exchange.

Following the initial four-month term, the Agreement may continue on a month-to-month basis for additional campaign expenditures as agreed upon by the parties in advance, subject to acceptance by the TSX Venture Exchange.

About South Pacific Metals Corp.

South Pacific Metals Corp. is an emerging gold-copper exploration company operating in the heart of Papua New Guinea’s proven gold and copper production corridors. SPMC has four exploration properties:

  • Ontenu (Osena) – Bordering K92 to the southwest. Drilling underway on K92-style targets with surface assays up to 21% Cu, 13.9 g/t Au, 645 g/t Ag and 73 g/t Au defining kilometre-scale corridors.
  • Anga – Bordering K92 to the northeast, along strike from K92’s Arakompa discovery; soils to 1,080 ppb Au, 3,397 ppm Cu and stream samples up to 8 g/t Au.
  • Kili Teke2 Moz AuEq* NI 43-101 Inferred Resource (effective 18 November 2022) containing 1.81 Moz Au, 802 kt Cu, & 40 kt Mo; results outside of resource include drilling 7.8 m @ 12.98% Cu plus 11.75 g/t Au, surface samples up to 27.5% Cu.
  • May River – District-scale system beside Frieda River; high-grade drilling includes 19 m @ 11.47% Cu, 2.17 g/t Au and 109 m @ 1.53 g/t Au.

* Au-equivalent contained ounces based on equal recoveries of Au and Cu only and prices of US$3,300/oz Au and US$4.45/lb Cu. Preliminary metallurgical testwork by Harmony Gold shows gold reporting to copper minerals, indicating the two can be co-recovered. Molybdenum is not included in the Au-equivalent figure.

SPMC common shares are listed on the TSX Venture Exchange (TSX.V: SPMC), the OTCQB Marketplace (OTCQB: SPMEF) and Frankfurt Stock Exchange (FSE: 6J00).

For further information please contact:

Michael Murphy, Executive Chairman

Tel: +1-604-260-0309

Email: info@southpacificmetals.ca

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.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of applicable Canadian securities laws. Forward-looking information is often, but not always, identified by words and phrases such as “anticipates”, “expects”, “intends”, “plans”, “believes”, “estimates”, “may”, “could”, “would”, “will”, “potential”, “proposed”, “subject to” and similar expressions, or statements that certain actions, events or results “may”, “could”, “would” or “will” occur or be achieved. Forward-looking information in this news release includes, among other things, statements regarding the Company’s planned and ongoing drilling and exploration programs, the timing and expected results of those programs, the interpretation of geological, geochemical and geophysical data, the potential for mineralisation on the Company’s properties.

Forward-looking information is based on the Company’s current expectations, estimates, forecasts and projections, as well as assumptions that the Company considers reasonable as of the date of this news release. These assumptions include, among others: the continuity of mineralisation; the accuracy of the Company’s interpretation of geological, geochemical and geophysical data; the timing and results of planned and ongoing drilling and exploration; the timeliness of assay results from third-party laboratories; the Company’s ability to obtain and maintain required permits and regulatory approvals; the continued support of local communities and government stakeholders in PNG; the availability of equipment, personnel and consultants; continued access to project sites; and general business, economic and capital market conditions.

Forward-looking information is subject to known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to differ materially from those expressed or implied by such forward-looking information. These risks and uncertainties include, among others: risks inherent in mineral exploration and development, including that exploration may not result in the discovery of an economically viable mineral deposit; the risk that drilling results, assays and geological interpretations may not be indicative of the presence, continuity or grade of mineralisation; delays in receiving assay results or in the progress of exploration programs; the risk that historical results and third-party data may not be verified or replicated; uncertainties relating to mineral resource estimates, including the Kili Teke Inferred Mineral Resource; the risk that planned exploration activities may be delayed, modified, suspended or terminated; risks relating to title, permitting and access to mineral properties; risks relating to operations in Papua New Guinea, including political, security, infrastructure, community-relations and logistical risks; the Company’s ability to fund its business and exploration activities; commodity price volatility; currency fluctuations; and the other risks described in the Company’s public disclosure documents filed under its profile on SEDAR+.

Readers are cautioned not to place undue reliance on forward-looking information. The forward-looking information contained in this news release is made as of the date hereof, and the Company does not undertake any obligation 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.