Tribeca Resources Provides Update on Activities Across its Expanded Chilean Copper Exploration Portfolio

(TheNewswire)

15 DECEMBER, 2025 | VANCOUVER, BC – TheNewswire - Tribeca Resources Corporation (TSXV: TRBC) (OTCQB: TRRCF) (“ Tribeca Resources ”,the “ Company ”) is pleased to report that fieldwork has commenced on theCompany’s Jiguata property in the Tarapacá region of northern Chile(the “Jiguata Property”). This follows the recent signing of a5-year purchase option agreement (the “Jiguata Option Agreement”)and successful completion of a C$6.5 million financing as more fullydescribed in the Company’s news releases dated October 29, 2025 andOctober 23, 2025, respectively.

Highlights:

• Field crews mobilized to the Jiguata porphyrycopper-molybdenum property to commence mapping and sampling

• Global Ore Discovery, a highly experienced geologicalconsultancy, engaged to deliver expert guidance on explorationactivities and drill targeting at the Jiguata Property. Known forinnovative, pragmatic, and leading-edge exploration solutions andtechnologies to optimise exploration success

• Historic Jiguata induced polarization (“IP”)geophysical data has been reprocessed and ground magnetic dataacquisition planned to commence in second half of December

• Phase 3 drill program planned at La Higuera IOCGProject (as defined below), commencing with an initial three holes forapproximately 1,000 metres at the Chirsposo Sur Target (as definedbelow) in Q1 2026, prior to further drilling at the Gaby target

Tribeca Resources CEO, Dr. Paul Gowcommented:

“Following signing of thedefinitive purchase option agreement in late October, TribecaResources, has now mobilised field teams to the Jiguata porphyrycopper-molybdenum property in northern Chile. An intensive phase ofsurface data acquisition over the coming months, in order to build acomprehensive geological, geochemical and geophysical picture of thisvery large alteration system, is now underway. We are optimistic thatsome compelling drill targets will emerge from this work, which welook forward to drill testing later in 2026. “

“At our cornerstone LaHiguera IOCG Project in the coastal IOCG belt, we areplanning to initially drill the Chirsposo Sur Target in Q1 2026. Thistarget is entirely covered by shallow gravels, has not previously beendrilled by Tribeca Resources, and has a geophysical footprint withstrong similarities to our Gaby IOCG discovery, four kilometers to thenorth. The objective at the Chirsposo Sur Target is to intersectsimilar breccia-hosted copper-gold mineralization to that encounteredover significant widths at Gaby.”

Jiguata Porphyry Copper-MolybdenumProperty

The Jiguata Property is a 10,000 hectare propertylocated in the Tarapacá region in northern Chile. It is situated inthe northern extension of the prolific Eocene-Oligocene porphyrycopper belt of northern Chile, approximately 120km north of theCollahuasi and Quebrada Blanca copper-molybdenum deposits (Figure 1).Access to the area is via a maintained road that passes directlythrough the property.

Pre-existing geological mapping, soil and rockgeochemistry, IP surveying and limited historic drill data outlineseveral drill targets, with additional earlier stage targets elsewhereon the property remaining to be detailed with the additional fieldwork currently underway. Further information about the property isavailable in Tribeca Resources’ news release dated June 19,2025.

Field teams have commenced geological mapping andsystematic soil and mapping-based selective rock chip samplingprograms. The sampling is proposed to provide a comprehensivemultielement geochemistry and hyperspectral database to aid indefinition of vectors to copper mineralization within the extensivezones of intense epithermal alteration present in the area. Inaddition, acquisition and processing of detailed satellite hyperspectral imagery is underway to assist indetailing mineralogical zonation within the large alterationsystem.

Global Ore Discovery Pty Ltd (“GO”), a highlyexperienced geological consultancy, has been engaged to deliver expertguidance on exploration activities and drill targeting at the JiguataProperty. The GO team has experience working with companies exploringfor porphyry and epithermal deposits, including Tier 1 miningcompanies and successful junior mining issuers throughout theworld.

GO and its principals have extensive experience in manyof the world’s premier porphyry and epithermal belts in theAmericas, Australasia, and Central Asia where GO has a track record ofdirectly contributing to a number of new discoveries and expandingdeposit knowledge to guide focused exploration. Within theChilean-Argentine porphyry and epithermal belts, GO has detailedknowledge of the Maricunga, Vicuña, Domeyko, and Alumbrera-Agua Ricadistricts.

Ground magnetic surveying is currently scheduled forcommencement in the second half of December. The program will covermost of the 10,000-hectare property area at approximately 200m linespacing.

The historic IP geophysical database has beenreprocessed. The historic surveying in 2013 comprised 1km-spaced linesof 8km length (150m pole-dipole) to cover approximately 40 squarekilometres. A 3D inversion of this data has been completed and hasmore confidently constrained the location of the significant IPchargeability anomalies in the area, as well as providing a coherentmodel of the IP resistivity distribution. This 3D model will beintegrated with the mapping, geochemistry and magnetic data as fieldacquisition progresses.

The data acquisition from the field activities outlinedabove is anticipated to continue through the period December 2025 toMarch 2026, with the time required dependent on the duration of anyinterruptions required due to adverse weather associated with the‘Bolivian Winter’. Following this ground acquisition, data will beintegrated and drill targets defined. Depending on progress of thesepre-drilling field activities, drill testing of targets is envisagedto be undertaken in Q2 or Q3 of 2026.

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Figure 1. Location of the Jiguata Property within thenorthern extension of the Eocene-Oligocene Metallogenic Belt ofnorthern Chile, which hosts several of the world’s largest copperdeposits.

La Higuera IOCG Project

The La Higuera project is located towards the southernend of the Chilean coastal iron-oxide copper-gold (“IOCG”) belt inthe Coquimbo Region of Chile, and comprises 41 mining and fiveexploration licences for 4,547 hectares (the “La Higuera IOCGProject”). It hosts multiple copper-gold targets, two of which haveto date been drilled by Tribeca Resources. At the Gaby target, TribecaResources has drilled 17 holes, with mineralization identified over a1.5km strike length, with a best intersection of 268m @ 0.66% Cu, 0.14g/t Au, 330ppm Co and 24.7% Fe from 52m in drill hole GBY001 (seeTribeca Resources’ news release dated January 30, 2023). Drillinghas also been completed at the Chirsposo target, with a best resultfrom two drill holes of 167m @ 0.21% Cu, 0.06 g/t Au from 56m in holeCHS002 (see Tribeca Resources’ news release dated May 17, 2023) (the“Chirsposo Sur Target”).

Drilling has been planned at the Chirsposo Sur Target,which is an interpreted strong hydrothermal magnetite alterationsystem under thin gravel cover in the southern project area. Inversionof the ground magnetic data indicates the system comprises asteeply-dipping north-south oriented magnetite alteration system of1.2 km strike length. It is interpreted as hosted within a strand ofthe Atacama Fault System, which is intensely-developed in this areaand cross-cut by several northwest-trending faults. The interpretedbody is also coincident with an intense (>30 mV/V) north-south IPchargeability trend that stretches over 2.4km,with the main Chirsposo Sur Target at its northern end where TribecaResources drilled significant mineralization (see above). The programis proposed to comprise three holes over the 1.2 km strike length ofthe most intense magnetic body for a total of approximately 1000m ofdrilling. Plans for further drilling at the Gaby discovery thereafterare being drawn up.

Two historic vertical diamond holes at the ChirsposoSur Target, drilled approximately 200m to the west of the bodyintersected IOCG-style alteration with weak copper mineralisation (8m@ 0.23% Cu from 38m in hole CB-02), and demonstrate strong magnetitealteration with a coarse-grained pyrite-dominated sulphide assemblagesimilar to the late-stage Association 2 mineralization at the Gabydiscovery 4 km to the north (see Tribeca Resources’ news releasedated February 6, 2024).

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Figure 2. Location of Tribeca Resources’ five keytargets at the La Higuera IOCG Project shown with the ground magneticdata. The Chirsposo Sur Target is located approximately 4km south ofthe Gaby discovery, and is interpreted on the basis of geophysicaldata to represent a similar Atacama Fault-hosted magnetite-dominatedbreccia system.

Qualified Person

All scientific and technical information in this pressrelease has been prepared by, or approved by, Dr. Paul Gow, who is theCEO of Tribeca Resources. He is a Member of the Australian Instituteof Geoscientists (MAIG), a Member of the Australasian Institute ofMining and Metallurgy (MAusIMM) and a qualified person for thepurposes of National Instrument 43-101 – Standards of Disclosure forMineral Projects (“NI 43-101”). Dr. Gow has not verified any ofthe information regarding any of the properties or projects referredto herein other than the La Higuera IOCGProject , the Jiguata Property and the Chiricutoproperty. Mineralization on any other propertiesreferred to herein is not necessarily indicative of mineralization onthe La Higuera IOCG Project , the Jiguata Property and the Chiricuto property.

About Tribeca Resources

Tribeca Resources is acopper exploration company focused on discovering and developingassets in the coastal IOCG belt of northern Chile. The Company’smanagement team, whose members are significant shareholders of theCompany, has world-leading expertise and a discovery history with ironoxide copper-gold deposits in the world’s great IOCG Belts of theCaraj ás district inBrazil and the Gawler and Cloncurry provinces of Australia.

Tribeca Resources’ objective is to provide themineral resources for the next generation of copper mines in Chile. Itis focused on building a portfolio of projects, with emphasis on midto advanced-stage copper exploration and resource developmentprojects. To this end, mineral targets are regularly assessed inpursuit of acquisition, strategic exploration and significantdiscovery.

Tribeca Resources’portfolio comprises three early- to advanced-stage explorationprojects in northern Chile.  The flagship La Higuera IOCG Project has seen approximately10,000m of drilling with mineralization defined over a 1.4 kilometerstrike length. The Chiricuto and Jiguata projects are earlier stageporphyry copper-gold-molybdenum targets, held under purchase optionagreements.

On behalf of Tribeca ResourcesCorporation

Cautionary Note

Neither the TSX Venture Exchange Inc. nor itsRegulation Service Provider (as that term is defined in the policiesof the TSX Venture Exchange Inc.) accepts responsibility for theadequacy or accuracy of this press release.

This press release does not constitute or form a partof any offer or solicitation to purchase or subscribe for securitiesin the United States. The securities referred to herein have not beenand will not be registered under the Securities Act of 1933, asamended (the “Securities Act”), or with any securities regulatoryauthority of any state or other jurisdiction in the United States, andmay not be offered or sold, directly or indirectly, within the UnitedStates or to, or for the account or benefit of, U.S. persons, as suchterm is defined in Regulation S under the Securities Act(“Regulation S”), except pursuant to an exemption from or in atransaction not subject to the registration requirements of theSecurities Act.

Forward Looking Information

This press release contains forward-looking statementsand information that are based on the beliefs of management andreflect the Company's current expectations. When used in thispress release, the words "estimate", "project","belief", "anticipate", "intend","expect", "plan", "predict","may" or "should" and the negative of these wordsor such variations thereon or comparable terminology are intended toidentify forward-looking statements and information. Theforward-looking statements and information in this press releaseinclude statements regarding therelationship between geophysical and geochemical survey results andpotential mineralization, the size and timing of the proposed 2026drill programs, the integration of newand historic data to define drill targets, the anticipatedcommencement and completion of ground magnetic surveying and otherfield activities (including the potential for weather-related delays),the ongoing engagement of GO and its impact on exploration outcomes,the use of proceeds from recently completed financings, the ability tosecure and maintain necessary permits and approvals and the operationsand future plans of the Company, including potential additionaldrilling and property acquisitions .

Such statements and information reflect the currentview of the Company. By their nature, forward-looking statementsinvolve known and unknown risks, uncertainties and other factors,which may cause our actual results, performance or achievements, orother future events, to be materially different from any futureresults, performance or achievements expressed or implied by suchforward-looking statements. Such factors include, among others, theability of the Company to pay the purchase price and make any otherpayments required under the Jiguata Option Agreement, as well as tocomplete its option to acquire the Gaby target, risks associated withmineral exploration, including the risk that actual results ofexploration will be different from those expected by management, risksof delays or interruptions to exploration activities due to weather,logistical or access issues, risks related to obtaining andmaintaining necessary permits and approvals, risks related to theavailability and retention of key personnel, the ability to raiseadditional capital, fluctuations in commodity prices and marketconditions, the reliability of historic or third-party data,unanticipated costs or environmental liabilities and the risk that newlaws or regulations could adversely affect the business and results ofoperations of the Company and anticipated work on the Company’sprojects.

There are several important factors that could causethe Company’s actual results to differ materially from thoseindicated or implied by forward-looking statements and information.Such factors include, among others: reliance on key management;changes in the credit or security markets; results of operationactivities; unanticipated costs and expenses; fluctuations incommodity prices; and general market and industry conditions. TheCompany cautions that the foregoing list of material factors is notexhaustive. When relying on the Company's forward-lookingstatements and information to make decisions, investors and othersshould carefully consider the foregoing factors and otheruncertainties and potential events.

The Company has assumed that the material factorsreferred to in the previous paragraph will not cause suchforward-looking statements and information to differ materially fromactual results or events. The forward-looking information contained inthis press release represents the expectations of the Company as ofthe date of this press release and, accordingly, is subject to changeafter such date. Readers should not place undue importance on forwardlooking information and should not rely upon this information as ofany other date. While the Company may elect to, it does not undertaketo update this information at any particular time except as requiredin accordance with applicable laws.

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