Star Metro - Marimaca Copper Extends High-Grade Bornite Zone at Pampa Medina - 6m of 6.11% Cu and 24.0g/t Ag; 40m of 2.04% Cu and 11.1g/t Ag from SPRD-07

Hole

Total Depth (m)

From (m)

To (m)

Intersection (m)

% CuT

g/t Ag

SPRD-07

900

52

56

4

0.56

1.5

180

190

10

0.31

2.8

326

352

26

0.25

Below Detection

558

860

302

0.62

2.7

Including

564

584

20

2.65

13.9

Including

574

580

6

6.11

24

And

664

768

104

1.01

4.7

Including

670

710

40

2.04

11.1

Including

688

702

14

3.36

17.7

Including

698

702

4

6.54

38.5

And

846

858

12

0.68

3.0

SPRD-08B

1,052

386

1,046

660

0.41

1.8

Including

386

484

98

1.21

7.6

Including

388

404

16

2.90

21.2

Including

390

396

6

4.30

31.7

And

426

484

58

1.08

6.5

And

516

588

72

0.46

Below Detection

Including

516

526

10

1.10

1.8

Including

580

588

8

0.96

Below Detection

And

662

676

14

0.83

Below Detection

And

802

868

66

0.70

Pending

Including

834

848

14

1.05

Pending

Including

862

868

6

1.40

Below Detection

And

930

964

34

0.65

Below Detection

SPRD-09

1,050

192

236

44

0.24

Below Detection

434

540

106

0.65

2.1

Including

440

470

30

1.26

2.6

Including

440

446

6

2.34

10.7

And

464

470

6

2.50

2.3

And

506

538

32

0.85

4.4

Including

520

538

18

1.11

7.4

940

946

6

0.77

2.0

1,006

1,012

6

1.05

8.3

Hole

Easting

Northing

Elevation

Azimuth

Inclination

Depth

SPRD-07

406800.84

7440649.24

1274.5

270

-60

900

SPRD-08B

406490.24

7440647.07

1281.15

270

-60

1052

SPRD-09

406730.98

7440347.77

1274.83

270

-60

1050

Sampling techniques

• Nature and quality of sampling (eg cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling.

• Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used.

• Aspects of the determination of mineralisation that are Material to the Public Report.

• In cases where 'industry standard' work has been done this would be relatively simple (eg 'reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay'). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (eg submarine nodules) may warrant disclosure of detailed information.

All current drilling conducted at Sierra Medina, which includes the Pampa Medina deposit, was completed under the supervision of a registered professional geologist as a Competent Person/Qualified Person (QP) who is responsible and accountable for the planning, execution, and supervision of all exploration activity as well as the implementation of quality assurance programs and reporting.

• Drilling reported is Reverse Circulation "RC" collared and Diamond ("DDH") tailed drilling

• Assay samples were prepared at a laboratory site in Copiapó and assayed by Andes Analytical Assay Ltd. (AAA) in Santiago.

• Sierra Medina´s diamond drill holes are drilled and sampled on a continuous 2-meter basis, halved by a conventional core splitter on site, with one half sent to the Andes Analytical Assay preparation laboratory in Copiapó and the pulps then sent to the same company laboratory in Santiago for assaying.

• Sierra Medina RC holes are drilled and sampled on a continuous 2-meter basis and riffle split on site up to one-eighth (12.5%) of its volume, after which samples are sent for preparation and assaying.

• Marimaca staff supervised all the drilling and sampling.

• DD recoveries were controlled by accurate core recovery measurement control was extended toward the division process realized in the drill location.

• DD recoveries were measured by core length measurement and compared with the effective core run. Marimaca technical staff checked all data.

• Measured recoveries are over 95% for DDH drilling, without significant variations and unrelated to copper grades.

• RC recoveries were controlled by weighing samples and accurate control was extended toward the division process realized in the drill location.

• RC recoveries were measured in weight percent as compared with a theoretical sample weight. Marimaca technical staff checked all data.

• Measured recoveries are over 95% for RC drilling, without significant variations and unrelated to copper grades.

Drilling techniques

• Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc).

• Drilling reported RC collared and DDH-tailed drilling, DDH drilling commenced when the contact between the upper volcanics and upper sediments is encountered, which is variable in depth

• DDH drilling is drilled in HQ and NQ standard core diameters

Drill sample recovery

• Method of recording and assessing core and chip sample recoveries and results assessed.

• Measures taken to maximise sample recovery and ensure representative nature of the samples.

• Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material.

• Sierra Medina´s DDH holes are drilled and sampled on a continuous 2-meter basis, halved by a conventional core splitter on site, with one half sent to the Andes Analytical Assay preparation laboratory in Copiapó and the pulps then sent to the same company laboratory in Santiago for assaying.

• Sierra Medina RC holes are drilled and sampled on a continuous 2-meter basis and riffle split on site up to one-eighth (12.5%) of its volume, after which samples are sent for preparation and assaying.

• Marimaca staff supervised all the drilling and sampling.

• DD recoveries were controlled by accurate core recovery measurement control was extended toward the division process realized in the drill location.

• DD recoveries were measured by core length measurement and compared with the effective core run. Marimaca technical staff checked all data.

• RC recoveries were controlled by weighing samples and accurate control was extended toward the division process realized in the drill location.

• RC recoveries were measured in weight percent as compared with a theoretical sample weight. Marimaca technical staff checked all data.

• Measured recoveries are over 95% for RC drilling, without significant variations and unrelated to copper grades.

Logging

• Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies.

• Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography.

• The total length and percentage of the relevant intersections logged.

Sub-sampling techniques and sample preparation

• If core, whether cut or sawn and whether quarter, half or all core taken.

• If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry.

• For all sample types, the nature, quality and appropriateness of the sample preparation technique.

• Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples.

• Measures taken to ensure that the sampling is representative of the in situ material collected, including for instance results for field duplicate/second-half sampling.

• Whether sample sizes are appropriate to the grain size of the material being sampled.

• Sierra Medina´s DDH holes are drilled and sampled on a continuous 2-meter basis, halved by a conventional core splitter on site, with one half sent to the Andes Analytical Assay preparation laboratory in Copiapó and the pulps then sent to the same company laboratory in Santiago for assaying

• The last split yields "sample A", which is sent for preparation and assaying, and "sample B", which is used to obtain drill cuttings (1 kg) and coarse/preparation duplicates and then stored in special facilities on site.

• DDH samples are obtained every 2 meters from a half-core, with the other half stored on site.

• RC holes are drilled and sampled on a continuous 2-meter basis and its samples riffle split on site three times, up to one eighth (12.5%) of its volume.

• The last split yields "sample A", which is sent for preparation and assaying, and "sample B", which is used to obtain drill cuttings (1 kg) and coarse/preparation duplicates, and then stored in special facilities on site.

• Samples are transferred by laboratory personnel from the project to Copiapó, and then the preparation pulps are returned to generate the analysis batches. Upon receipt, sample details are logged and insertion points for quality control samples in the sample flow are determined.

• Samples were prepared using the following standard protocol: drying; crushing all samples to -1/4" and passing through a secondary crusher to better than 80% passing -10#; homogenizing; splitting; pulverizing a 400-600g subsample to 95% passing -150#; and a 125g split of this sent for assaying. All samples were assayed for sequential copper %CuT (total copper); %CuS (acid soluble copper), %CuCN (cyanide soluble copper) and CuRes (residual copper), and multi-element Optical Inductively Coupled Plasma (ICP). A full QA/QC program, involving insertion of appropriate blanks, standards and duplicates was employed with acceptable results. Pulps and sample rejects are stored by Marimaca Copper for future reference.

• Laboratory results are loaded directly from digital assay certificates into the database, in order to minimize error sources.

Quality of assay data and laboratory tests

• The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total.

• For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc.

• Nature of quality control procedures adopted (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (ie lack of bias) and precision have been established.

• Samples are prepared at a laboratory site in Copiapó and assayed by Andes Analytical Assay Ltd. (AAA) in Santiago.

• Samples were prepared using the following standard protocol: drying; crushing all samples to -1/4" and passing through a secondary crusher to better than 80% passing -10#; homogenizing; splitting; pulverizing a 400-600g subsample to 95% passing -150#; and a 125g split of this sent for assaying. All samples were assayed for %CuT (total copper); %CuS (acid soluble copper). A full QA/QC program, involving insertion of appropriate blanks, standards and duplicates was employed with acceptable results. Pulps and sample rejects are stored by Marimaca Copper for future. In addition to copper analyses, multi-element analysis including silver (Ag) was undertaken using ICP.

• All samples were assayed for sequential copper %CuT (total copper); %CuS (acid soluble copper), %CuCN (cyanide soluble copper) and CuRes (residual copper). Silver and an additional 33 elements were analysed using a 0.5g pulp sample and measured by optical ICP.

• Laboratory results are loaded directly from digital assay certificates into the database, in order to minimize error sources.

• The analytical quality control programs implemented at Marimaca involve the use of coarse/preparation and pulp duplicates for precision analyses and standard reference materials (SRM). QA/QC procedures apply equally to silver and the multi-element suite.

• Marimaca has protocols in place for handling analytical results that exceed acceptable limits, which can ultimately trigger re-assays of entire or portions of sample batches.

Verification of sampling and assaying

• The verification of significant intersections by either independent or alternative company personnel.

• The use of twinned holes.

• Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols.

• Discuss any adjustment to assay data.

Location of data points

• Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation.

• Specification of the grid system used.

• Quality and adequacy of topographic control.

Data spacing and distribution

• Data spacing for reporting of Exploration Results.

• Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied.

• Whether sample compositing has been applied.

Orientation of data in relation to geological structure

• Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type.

• If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material.

• Drill hole orientation was generally oriented to be sub perpendicular to the mineralisation but variable in places given the nature of the exploration program being conducted

• Assays are reported on a downhole basis

• True widths are estimated as 80% of reported downhole intersection widths

Sample security

• The measures taken to ensure sample security.

• All drilling assay samples are collected by company personnel or under the direct supervision of company personnel.

• Samples from Marimaca were initially processed at the project site and shipped directly from the property to a laboratory facility for final preparation, and later, upon their return, to the laboratory for analysis.

• Appropriately qualified staff at the laboratories collect assay samples.

• Security protocols implemented maintain the chain of custody of samples to prevent unnoticed contamination or mixing of samples and to make active tampering as difficult as possible.

Audits or reviews

• The results of any audits or reviews of sampling techniques and data.

Mineral tenement and land tenure status

• Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings.

• The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area.

• Marimaca Copper Corp. owns a tenement package consisting of approximately 14,500 hectares at the broader Sierra de Medina project area. The concessions are a mix of mining concessions and exploration concessions.

• The Sierra de Medina land package comprises 55 concessions owned by ICAL, a subsidiary of Marimaca Copper Corp.

• The Pampa Medina Project comprises 12 concessions owned by SCM Elenita over which the Company entered into an option agreement to acquire.

• The Madrugador Project comprises 10 concessions owned by SLM Juanita and SLM Madrugador over which the Company entered into an option agreement to acquire.

• There are no known impediments to operating exploration drilling campaigns on the project areas.

Exploration done by other parties

• Acknowledgment and appraisal of exploration by other parties.

• The Madrugador concessions were previously the subject of limited exploration efforts since the 1980s. Most of the exploration on the Madrugador concessions was conducted by Rayrock from 1993 to 1996 and consisted of diamond and reverse circulation drilling. A total of 23,502 m of diamond and RC drilling in 223 holes had been completed on the property prior to 2005. Proyecta, a Chilean engineering company, conducted a short track RC drilling program on the Madrugador claim in 2005.

• During the period 1994 to 1999, Rayrock conducted geological mapping of the property, a stream sediment and soil/road‐cut sampling survey, as well as limited diamond drilling.

• In 2007 and 2008, Apoquindo Minerals Inc. (Apoquindo) completed 21,177 m of RC drilling in 132 holes and 1,206 m of diamond drilling in eight holes.

• In April 2009, Apoquindo entered into a JV agreement with Minera S.A.

Geology

• Deposit type, geological setting and style of mineralisation.

• The Pampa Medina district is characterized by Jurassic-Triassic volcanic- and sediment-hosted manto-style copper mineralization. Volcanic-hosted mineralization, such as the shallow Madrugador mineralization, resembles typical Coastal Belt copper-style mineralization. Sediment-hosted mineralization is exposed in old mine workings along the Sierra de Valenzuela District and has also been intersected in deeper drilling beneath areas where the host sediments are covered by volcanics.

• The main structural controls are block faulting and a complex of dyke swarms. Copper mineralization observed in drill holes comprises both oxides and sulphides. The predominant oxides are atacamite, azurite and chrysocolla. The oxide zone varies from less than 10m to more than 200m in thickness and is associated with an irregular mixed zone characterized by green copper oxides, mainly atacamite, and copper sulphides, mainly chalcocite, with lesser chalcopyrite and pyrite. At depths of more than 300m, primary mineralization is dominant and consists of chalcopyrite, bornite, variable covellite and pyrite.

• Rock alteration is mostly albitization of sediments and little clay is observed in the upper oxidized zones.

Drill hole Information

• A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes:

  • easting and northing of the drill hole collar

  • elevation or RL (Reduced Level - elevation above sea level in metres) of the drill hole collar

  • dip and azimuth of the hole

  • down hole length and interception depth

  • hole length.

• If the exclusion of this information is justified on the basis that the information is not Material and this exclusion does not detract from the understanding of the report, the Competent Person should clearly explain why this is the case.

• Drill hole attribute information is included in a table herein.

Data aggregation methods

• In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (eg cutting of high grades) and cut-off grades are usually Material and should be stated.

• Where aggregate intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail.

• The assumptions used for any reporting of metal equivalent values should be clearly stated.

• Length weighted averages were used to calculate grade over width.

• No specific grade cap or cut-off was used during grade width calculations. The total copper (CuT) weighted average grade of the entire interval is calculated for all intervals over 2m samples lengths. Manto-type deposits can be variable in nature resulting in some intervals having a small number of poorly mineralized samples (

• Silver assays reporting less than 3 gpt Ag detection limit in the ICP analysis were assigned a value of zero.

• No metal equivalents have been reported.

Relationship between mineralisation widths and intercept lengths

• These relationships are particularly important in the reporting of Exploration Results.

• If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported.

• If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (eg 'down hole length, true width not known').

• True widths are estimated at 80% of the reported downhole intersection, however drilling generally targets sub-perpendicular intersections of the mineralized manto units as understood/interpreted at the time of drilling

• All intersections are reported on a downhole basis.

Diagrams

• Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported These should include but not be limited to a plan view of drill hole collar locations and appropriate sectional views.

• Please refer to the figures contained herein

Balanced reporting

• Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results.

• All significant results have been reported

• Please refer to the tables herein

Other substantive exploration data

• Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical survey results; geochemical survey results; bulk samples - size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances.

• There is no meaningful and material exploration data to report other than the information disclosed in this release

Further work

• The nature and scale of planned further work (eg tests for lateral extensions or depth extensions or large-scale step-out drilling).

• Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive.

• Over the course of 2026, the Company intends to complete further exploration work at the project area including:

  • Geophysical surveys

  • Reverse circulation and diamond core drilling

• Of particular focus will be the potential for extensions from the Pampa Medina Deposit north and west