Monument’s Drill Assay Results Highlight Selinsing Gold Mine Expansion Potential
May 29, 2026 News Release Release #04-2026
Monument’s Drill Assay Results Highlight Selinsing Gold Mine Expansion Potential
Vancouver, B.C., May 29, 2026 - Monument Mining Limited (TSX-V: MMY and FSE: D7Q1) ("Monument" or the "Company") is pleased to announce the results of an additional twenty-three
(23) holes that have been received with high gold assay results from the Buffalo Reef/Felda areas and updated drilling activities, under the mine expansion drilling program at the Selinsing Gold Mine, located in Pahang State in the Central Gold Belt of Western Malaysia.
Ms. Cathy Zhai, President and CEO of Monument commented: "The drill assay results reported in this announcement underlie the strong potential for resource addition outside of the Life of Mine (“LOM”) and the Expanded Pit Shell. We have deployed more drill rigs and continue to improve the efficiency of exploration.”
The Stage 1 and Stage 2 drilling for mine expansion program have completed, including 123 holes for 17,136m, compared to the planned 118 holes for 17,477m. Further drilling programs are under review.
DRILL PROGRAM HIGHLIGHTS
Results from twenty-three (23) completed drill holes of the Buffalo Reef/Felda Mine Expansion Drilling Program have been received (Appendix A), with high gold assay results returned.
Significant highlights include:
Stage 1
BRC2 / BRC3 Gap
- MBRDD622: 6.5m @ 0.66g/t Au from 148.9m includes:
2.5m @ 1.35g/t Au from 152.9m
- MBRDD624: 3.8m @ 3.77g/t Au from 109.7m
- MBRDD625: 3.6m @ 3.58g/t Au from 136.9m
- MBRDD628: 6.2m @ 1.4g/t Au from 61.6m
0.8m @ 3.25g/t Au from 68.9m
3.0m @ 5.66g/t Au from 78.9m
1.1m @ 13.9g/t Au from 94.3m
5.8m @ 1.68g/t Au from113.4m
- MBRRC632: 2.2m @ 1.73g/t Au from 0.0m
2.0m @ 2.0g/t Au from 32.2m
15.5m @ 2.61g/t Au from 67.7m includes:
6m @ 5.62g/t Au from 72.7m
- MBRRC636: 3.9m @ 1.98g/t Au from 81m
- MBRDD641: 21.0m @ 1.99g/t Au from 42m includes:
4.5m @ 3.66g/t Au from 52.5m
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- MBRDD642: 6.7m @ 1.53g/t Au from 70.3 3.8m @ 4.60g/t Au from 96m
BRC3 / BRC 4 Gap
- MBRDD633: 1.3m @ 2.14g/t Au from 16.1m
- MBRDD637: 4.8m @ 2.81g/t Au from 26.0m
- MBRDD643: 7.6m @ 0.53g/t Au from 59.9m
Stage 2 BRC2/BRC3 Mineralization Extension
- MBRDD623: 2.6m @ 1.25g/t Au from91.3 m
4.5m @ 1.54g/t Au from 164.0m
- MBRDD626: 16.5m @ 3.07g/t from 64.1m
- MBRDD627: 10.1m @ 4.68g/t Au from 63.7m
3.4m @ 3.47g/t Au from 84.7m
- MBRDD629: 7.0m @ 3.10g/t Au from 39.0m
- MBRDD630: 1.7m @ 2.17g/t Au from 21.3m
5.3m @ 3.49g/t Au from 59.0m
6.0m @ 2.64g/t Au from 78.5m
- MBRDD631: 6.1m @ 6.12g/t Au from 44.2m
- MBRDD645: 1.0m @ 1.21g/t Au from 22.5m
- MBRDD646: 4.5m @ 1.47g/t Au from 100.5m
BRC3 Mineralization Extension
- MBRDD635: 8.1m @ 1.27g/t Au from 6.9m
3.0m @ 7.53g/t Au from 79.5m
3.0m @ 2.95g/t Au from 88.5m
12.5m @ 1.52g/t Au from 94.5m
6.5m @ 2.39g/t Au from 113.5m
- MBRDD638: 19.8m @ 1.90g/t Au from 100.7m includes:
4.3m @ 2.93g/t Au from 110.2
- MBRDD639: 22.5m @ 1.77g/t Au from 58.5m includes:
7.5m @ 3.58g/t Au from 64.5m
- MBRDD644: 5.5m @ 1.92g/t Au from 16.2m
Note: the reported intervals are downhole lengths and do not represent true widths. True widths will be determined once geological modelling has been completed.
BUFFALO REEF/FELDA MINE EXPANSION DRILLING
Buffalo Reef/Felda mine expansion drilling (Figure 1) contains Stage 1 and Stage 2 as a part of the Selinsing gold mine expansion program. The target area covers 115 acres of land, laying the foundation to evaluate the potential to extend the currently defined Mineral Resources, and to convert the
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current resources to reserves that are currently constrained by tenement boundaries. Success of exploration may potentially support the pit expansion at Buffalo Reef/Felda [1] and inform future LOM planning, subject to the tenement extension.
Figure 1: Long section through Buffalo Reef Central depicting Mine Expansion target Areas (Stage 1 and Stage 2) targeted in the Mine Expansion Drilling, looking west.
An additional twenty-three (23) assay results were received from diamond drill holes (Figure 1 and Figure 2). Drill holes continue to intersect multiple zones of gold mineralization in Stage 1 and Stage 2 targets. Continuity between previously modelled mineralized domains, and mineralized intervals intersected in drill holes, and between some drill holes is evident, which will likely result in an increased Inferred Mineral Resource.
[1] TSX: Monument announces commencement of expansion drilling program at Selinsing Gold Mine (July 7, 2025).
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Figure 2: Plan view of the Buffalo Reef Central (BRC2, BRC3 & BRC4), showing reported assay results (orange callouts), along with previously reported results [2] (white callouts). Blue symbols are holes waiting for results. Drilling is generally orientated from
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Figure 3: Plan view of BRC3 Pit, showing reported assay results (orange callouts) along with previously reported results [2] (white callouts). Blue symbols are holes waiting for results. Drilling is generally orientated from east to west.
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Table 1: Buffalo Reef/Felda Mine Expansion Drilling results. The reported intervals are downhole lengths and do not represent true widths. True widths will be determined once geological modelling has been completed.
| Hole ID | Intercept | Comments | |
|---|---|---|---|
| 1 | MBRDD622: | 4.2m @ 0.55g/t Au from 37.5m 14.4m @ 0.64g/t Au from 46.6m 1.0m @ 0.32g/t Au from 86.0m 4.0m @ 0.49g/t Au from 93.0m 0.7m @ 0.60g/t Au from 100.5m 0.9m @ 0.32g/t Au from 122.2m 1.4m @ 0.84g/t Au from 138.2m 1.0m @ 0.23g/t Au from 143.5m 6.5m @ 0.66g/t Au from 148.9m includes 2.5m @ 1.35g/t Au from 152.9m | BRC2/BRC3 Stage 2 |
| 2 | MBRDD626: | 16.5m @ 3.07g/t Au from 64.1m | BRC2/BRC3 Stage 2 |
| 3 | MBRDD627: | 10.1m @ 4.68g/t Au from 63.7m 3.4m @ 2.47g/t Au from 84.7m 1.6m @ 0.43g/t Au from 91.2m | BRC2/BRC3 Stage 2 |
| 4 | MBRDD629: | 2.0m @ 0.22g/t Au from 35.5m 7.0m @ 3.10g/t Au from 39.0m 0.5m @ 0.29g/t Au from 54.7m 2.6m @ 0.32g/t Au from 61.8m | BRC2/BRC3 Stage 2 |
| 5 | MBRDD630: | 1.7m @ 2.17g/t Au from 21.3m 5.3m @ 3.49g/t Au from 59.0m 6.0m @ 2.64g/t Au from 78.5m | BRC2/BRC3 Stage 2 |
| 6 | MBRDD631: | 6.1m @ 6.12g/t Au from 44.2m 4.6m @ 0.50g/t Au from 54.4m | BRC2/BRC3 Stage 1 |
| 7 | MBRDD632 | 2.2m @ 1.73g/t Au from 0.0m 3.0m @ 2.0g/t Au from 32.2m 15.5m @ 2.61g/t Au from 67.7m includes 6m @ 5.62g/t Au from 72.7m | BRC2/BRC3 Stage 2 |
| 8 | MBRDD637 | 1.6m @ 0.43g/t Au from 0.0m 4.8m @ 2.81g/t Au from 26.0m 0.7m @ 1.99g/t Au from 48.7m 0.9m @ 0.49g/t Au from 56.8m | BRC3/BRC4 Stage 2 |
| 9 | MBRDD642 | 1.0m @ 0.86g/t Au from 59.0m 1.4m @ 0.68g/t Au from 64.6m 6.7m @ 1.53g/t Au from 70.3m 3.8m @ 4.60g/t Au from 96.0m 0.9m @ 4.0g/t Au from 122.1m | BRC2/BRC3 Stage 2 |
| 10 | MBRDD643 | 3.0m @ 0.33g/t Au from 4.5m 7.6m @ 0.53g/t Au from 59.9m 2.0m @ 0.43g/t Au from 71.5m | BRC3/BRC4 Stage 1 BRC3/BRC4 Stage 2 |
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Table 2: Buffalo Reef/Felda Mine Expansion Drilling results. The reported intervals are downhole lengths and do not represent true widths. True widths will be determined once geological modelling has been completed.
| Hole ID | Intercept | Comments | |
|---|---|---|---|
| 11 | MBRDD644 | 1.5m @ 0.31g/t Au from 1.5m 5.5m @ 1.92g/t Au from 16.2m 1.8m @ 0.99 g/t Au from 38.2m 11.5m @ 1.90 g/t from 83.6m | BRC2/BRC3 Stage 2 BRC2/BRC3 Stage 1 |
| MBRDD623 | 1.5m @ 0.63g/t Au from 51.5m 0.9m @ 0.28g/t Au from 56.0m 2.6m @ 1.25g/t Au from 91.3m 4.5m @ 1.54g/t Au from 164.0m | BRC2 Stage 2 | |
| MBRDD624 | 0.8m @ 0.82g/t Au from 68.6m 3.8m @ 3.77g/t Au from 109.7m | BRC2/BRC3 Stage 2 | |
| MBRDD625 | 1.5m @ 0.21g/t Au from 9.9m 1.5m @ 0.24g/t Au from 14.4m 1.5m @ 0.26g/t Au from 45.9m 5.6m @ 3.58g/t Au from 136.9m | BRC2/BRC3 Stage 2 | |
| MBRDD628 | 1.5m @ 0.55g/t Au from 2.4m 0.7m @ 4.3g/t Au from 58.9m 6.2m @ 1.4g/t Au from 61.6m 0.8m @ 3.25g/t Au from 68.9m 3.0m @ 5.66g/t Au from 78.9m 1.1m @ 13.9g/t Au from 94.3m 5.8m @ 1.68g/t Au from 113.4m | BRC2/BRC3 Stage 2 | |
| MBRDD633 | 1.3m @ 2.14g/t Au from 16.1m | BRC3/BRC4 Stage 1 | |
| MBRDD635: | 8.1m @ 1.27g/t Au from 6.9m 3.0m @ 7.53g/t Au from 79.5m 0.7m @ 0.48g/t Au from 85.5m 3.0m @ 2.95g/t Au from 88.5m 12.5m @ 1.52g/t Au from 94.5m 6.5m @ 2.39g/t Au from 113.5m | BRC3 Stage 2 | |
| MBRDD636: | 3.9m @ 1.98g/t Au from 81.0m | BRC3 Stage 2 | |
| MBRDD638 | 19.8m @ 1.90g/t Au from 100.7m includes: [email protected]/t Au from 100.7m and 2.8m @ 2.31g/t Au from 105.4m and 4.3m @ 2.93g/t Au from 110.2m | BRC3 Stage 2 | |
| MBRDD639 | 1.5m @ 0.66g/t Au from 1.5m 1.5m @ 0.50g/t Au from 10.5m 22.5m @ 1.77g/t Au from 58.5m includes 7.5m @ 3.58g/t Au from 64.5m | BRC3 Stage 2 |
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Table 3: Buffalo Reef/Felda Mine Expansion Drilling results. The reported intervals are downhole lengths and do not represent true widths. True widths will be determined once geological modelling has been completed.
| Hole ID | Intercept | Comments |
| MBRDD641 | 2.0m @ 0.51g/t Au from 0.0m 0.7m @ 0.53g/t Au from 4.3m 21.0m @ 1.99g/t Au from 42.0m includes 4.5m @ 3.66g/t Au from 52.5m 1.5m @ 0.39g/t Au from 77.0m | BRC2/BRC3 Stage 2 |
| MBRDD641 | 2.0m @ 0.51g/t Au from 0.0m 0.7m @ 0.53g/t Au from 4.3m 21.0m @ 1.99g/t Au from 42.0m includes 4.5m @ 3.66g/t Au from 52.5m 1.5m @ 0.39g/t Au from 77.0m | BRC2/BRC3 Stage 2 |
| MBRDD645 | 1.0m @ 1.21g/t Au from 22.5m 1.3m @ 0.24g/t Au from 30.2m | BRC2/BRC3 Stage 1 |
| MBRDD646 | 4.5m @ 1.47g/t Au from 100.5m | BRC2/BRC3 Stage 2 |
| MBRDD635: | 8.1m @ 1.27g/t Au from 6.9m 3.0m @ 7.53g/t Au from 79.5m 0.7m @ 0.48g/t Au from 85.5m 3.0m @ 2.95g/t Au from 88.5m 12.5m @ 1.52g/t Au from 94.5m 6.5m @ 2.39g/t Au from 113.5m | BRC3 Stage 2 |
| MBRDD638 | 19.8m @ 1.90g/t Au from 100.7m includes 2.5m @ 3.02g/t Au from 100.7m and 2.8m @ 2.31g/t Au from 105.4m and 4.3m @ 2.93g/t Au from 110.2m | BRC3 Stage 2 |
| MBRDD639 | 1.5m @ 0.66g/t Au from 1.5m 1.5m @ 0.50g/t Au from 10.5m 22.5m @ 1.77g/t Au from 58.5m includes 7.5m @ 3.58g/t Au from 64.5m | BRC3 Stage 2 |
STAGE 1. Buffalo Reef “Gap” Drilling
Stage 1 Buffalo Reef/Felda Expansion drilling program focuses on evaluation of the potential resource increase to bridge the gaps between BRC2/BRC3 and between BRC3/BRC4 (Figure 1), to enable the pits to be combined and expanded, which may inform future LOM planning subject to further studies.
Eleven (11) of the Twenty (23) holes reported in this announcement (Table 1) targeted BRC2 / BRC3 Gap and the BRC3 / BRC4 Gap.
BRC2/BRC3 “Gap”
Drilling around the BRC2/BRC3 Gap continues to demonstrate continuity between drill holes and the existing resource domains. The successful intersecting of gold mineralization targeting the projection
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of known mineralized domains is encouraging for the drill program outcome, providing confidence that an increase to the resource base within the BRC2/BRC3 Gap is likely. Additionally, mineralization was also intersected in the Stage 1 drilling (below the LOM Pit Shell) and Stage 2 drilling (below the Expanded Pit Shell).
MBRDD632 (Figure 4) was planned to test Stage 1 and Stage 2 targets by extending the drill hole depth. MBRDD632 identified gold mineralization approximately 30m below the LOM pit shell and, approximately 20m below the Expanded Pit Shell. Both intersections correspond to known mineralized domains and gold intersections from MBRDD601 (Stage 1 drilling), MBRDD615 and MBRDD616[2] (Stage 2 drilling). MBRDD616 potentially extends the mineralization 70m down dip beyond the Expanded Pit Shell and likely represents the extension of mineralization within the western shear.
[2] TSX: Monument Announces Additional Assay Results from the Buffalo Reef / Felda Areas of Selinsing Gold Mine (February 18, 2026).
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Figure 4: Cross-section through BRC2/BRC3 gap at 3845mN north (20m wide window north and south) and depicting historic drilling and recently completed MBRRC622 and MBRRC632.
Other significant intercepts include MBRDD627, MBRDD631 and MBRDD644 (Figure 5). These holes targeted a section of the mineralized domain requiring further definition to confirm the interpreted steepening of the orebody. Drill holes intersected wide zones of high-grade mineralization broadly confirming the steepening ore body interpretation and confirming the extension of the mineralized domain at depth.
Figure 5: Cross-section through BRC3 (BRC2/BRC3 gap) at 3920mN north (20m wide window north and south) and depicting historic drilling and recently completed MBRRC627, MBRDD631 and MBRRC644.
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BRC3/BRC4 “Gap”
Generally, assay results from the BRC3/BRC4 Gap drilling have not been as significant as those intersected in the BRC2/BRC3 gap drilling, however, multiple gold intervals continue to be intersected.
MBRDD637 did not intersect mineralization at the planned target depth at the base of the Expanded Pit Shell, however, it did intersect [email protected]/t Au from 26.0m, corresponding to a poorly defined gold domain 14m beneath the current LOM pit shell, highlighting the need for continued drilling to define the true extent of this mineralization.
MBRDD643 intersected a wide, low-grade mineralized structure at the base of the Expanded Pit Shell. This intersection corresponds to a known mineralized domain and is 80m up dip of MBRDD618[3] ([email protected]/t Au from 203m, and [email protected]/t Au from 207.5m) suggesting the structure occurs at depth. Further drilling will be required to assess the economic gold potential of this zone.
STAGE 2. Buffalo Reef/Felda Drilling
Twelve (12) holes have been completed as part of Stage 2 drilling and are reported in Table 1. Stage 2 Buffalo Reef/Felda Expansion drilling program focuses on potential mine expansion through definition of new mineralized zones, and down dip extensions of mineralization, outside of the existing LOM pit shell (Figure 2).
Structural extension drilling has been successful in identifying mineralization down dip of known mineralized domains below the Mine Expansion Pit in multiple drill holes.
BRC2/BRC3 Mineralization Extension
BRC2/BRC3 Gap structural extension drilling has been successful in identifying gold mineralization down dip of current mineralized gold domains 75m below the Expanded Pit Shell.
MBRDD625 and MBRDD628 both intersected gold mineralization below the Expanded Pit Shell, down dip of a known mineralized gold domain. There are no other drill holes down dip or within 80m along strike on the same horizon, presenting a significant exploration space for future drilling and potential resource addition. MBRDD628 also intersected multiple zones on gold mineralization between 58.9m to 95.5m. These intersections were not replicated in MBRDD625 and require further investigation to interpret these results.
[3] TSX: Monument announces first 16 drill holes of Selinsing Mine Expansion Drilling Program (December 3, 2025).
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Figure 6: Cross-section through BRC3 Pit (BRC2/BRC3 gap down dip extension drilling) at 3535mN (40m wide window north and south) and depicting historic drilling and recently completed MBRRC625 and MBRDD628.
Drill hole MBRDD638 (Figure 7) was drilled 20m to the south of MBRDD644 (Stage 1 drilling) and intersected 19.8m@ 1.90g/t Au from 100.7m. This intersection corresponds with MBRDD644 and confirms the extension of the gold mineralized domains beyond the base of the Expanded Pit Shell.
This area provides Monument with further drill hole targets for future resource expansion.
Figure 7: Cross-section through BRC3 Pit, at 3900mN (40m wide window north and south) and depicting historic drilling and recently completed MBRRC630 and MBRDD638.
MBRDD641 intersected [email protected]/t Au from 42m which includes [email protected]/t Au from 52.5m (Figure 8). This intersection is 30m below the Expanded Pit Shell and combined with MBRDD619[2] potentially extends the mineralized domain a further 60m down dip. Stage 1 drill holes MBRDD622
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