20260710_AMMN_Laporan Bulanan Aktivitas Eksplorasi_32110659_lamp3.pdf

Batu Hijau Block I

Expenditure:
   • Exploration activity was exploration drilling. Costs were circa USD $44.4 K.

Work Areas:
  • Katala Cu-Au Project - (Eastern of Batu Hijau pit)

Exploration Parties:
   • Manager - AMNT Exploration.
   • Drilling contractor - PT Minera Nusa Drillindo (PT MND).
   • Assay Laboratory (drill core, rock) - Intertek Utama Service (ITS).

Assessment Methods:
   • Diamond drilling (1 rig).

Objective:
   • The objective of the exploration drilling in Katala is to identify and mapping the
       potential extent of porphyry Cu–Au mineralization in the area, which has previously
       been indicated by historical drill holes.

Exploration Result:
   • Exploration drilling - 1 hole (275.7 m) in progress.


Forward Plan:
   • Continue exploration drilling at Katala (1 rig), for 3 holes or 2400 m.
   • Initiate the exploration drilling program at West Nangka using 1 rig to drill 2 (two)
      holes with a total planned depth of 1,200 meters.




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Figure 2. Batu Hijau Block I Q2 2026 – In Pit Drill Collar Locations.




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Elang Block II

Expenditure:
   • Exploration activities included drilling and geological mapping. Costs were circa
      USD $ 2.78 M.

Work Areas:
  • Elang Cu-Au Project.
  • Gerbang East Cu-Au Project.
  • Sebu East Cu Au Project.

Exploration Parties:
   • Manager - AMNT Exploration.
   • Drilling contractor - PT Minera Nusa Drillindo (PT MND).
   • Assay Laboratory (drill core, rock) - Intertek Utama Service (ITS).

Assessment Methods:
   • Diamond drilling (3 rigs).
   • Geological mapping.
   • Alteration analyses using an ASD TerraSpec 4 Mineral Spectrometer.

Objectives:
   • Resource development drilling continued at the Elang Cu-Au deposit (Figure 2).
       The purpose of this infill program was to address data gaps, refine the geological
       model, and enhance the confidence level of mineral resource classifications.
   • The exploration drilling program in the Gerbang East area is designed to evaluate
       the mineralization potential and to obtain sufficient geological and grade data to
       support the classification of mineral resources within the deposit region.
   • The exploration drilling in Sebu East is aimed to follow up on last year’s exploration
       drilling results, which indicated the potential presence of porphyry Cu–Au
       mineralization beneath the Sebu East area. The focus of this program is to
       delineate the continuity of Cu–Au mineralization towards the north.
   • Geological mapping at Gerbang East and Elang Northeast is conducted to establish
       geological correlations at the surface between the Elang Cu-Au porphyry system
       and the Sepekat Cu-Au porphyry system, supporting the identification of drilling
       targets in both prospects.

Exploration Results:
   • Elang Cu-Au project diamond drilling (9 holes for 4,906.1 m):
           o Resource infill, Elang - 4 holes (2,735.8 m) completed or in progress,
           o Exploration drilling, Gerbang East - 3 holes (875.1 m) completed or in
              progress.
           o Exploration drilling, Sebu East 2 holes (1,295.2 m) completed.
   • Core samples submitted to the assay lab amounted to 1,897.
   • Geological mapping program –covered an area of 100.0 ha at Gerbang East and
       Elang Northeast, 55 rock chip samples were submitted to the lab.

Forward Plan:
   • Continue resource drilling at Elang and exploration drilling at Gerbang East (3 rigs).




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Figure 3. Elang Block II Q2 2026 – Exploration Locations.




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Rinti Block III

Expenditure:
   • Exploration activities involve completing the remaining drilling targets and
      conducting detailed geological mapping. Costs were circa USD $ 10.1 K.

Work Areas:
  • Rinti Cu-Au Project.

Exploration Parties:
   • Manager - AMNT Exploration.
   • Drilling contractor - PT Minera Nusa Drillindo (PT MND).
   • Assay Laboratory (drill core, rock) - Intertek Utama Service (ITS).

Assessment Methods:
   • Diamond drilling (1 rig).
   • Geological mapping.
   • Alteration analyses using an ASD TerraSpec 4 Mineral Spectrometer.

Objective:
   • Exploration drilling at Rinti is targeting the Cu-Au porphyry mineralisation potential
       below a lithocap in Bekolar. (Figure 4).
   • The objective of geological mapping is to reconfirm the extent and boundaries of
       alteration and mineralization around the Bekolar lithocap system, thereby
       supporting geological predictions for current drilling.

Exploration Result:
   • Exploration drilling - 1 hole completed (25.0 m).
   • Core samples submitted to the assay lab amounted to 94.
   • Geological mapping program – 18 rock chip samples were submitted to the lab.


Forward Plan:
•     Review of previous exploration results




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Figure 4. Rinti Block III Q2 2026 – Exploration Locations.




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Lampui Block IV

No exploration field work or costs incurred in Q2 2026.

Forward Plan:
   • Review of previous exploration results




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