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Mirasol and OceanaGold Sign Definitive Exploration Option Agreement for the La Curva Gold Project, Santa Cruz, Argentina

Mergers & Acquisitions Property Options & Staking

910 - 850 West Hastings Street, Vancouver, B.C. V6C 1E1 Canada

Tel: 604.602.9989 Fax: 604.609.9946 E-mail: [email protected]

www.mirasolresources.com

24430207.1

NEWS RELEASE

Mirasol and OceanaGold Sign Definitive Exploration Option Agreement

for the La Curva Gold Project, Santa Cruz, Argentina

VANCOUVER, BC, May 25, 2017 – Mirasol Resources Ltd. (TSX-V: MRZ, Frankfurt: M8R) (the

“Company” or “Mirasol”) is pleased to announce that on May 18 2017, the Company and one of its

100% owned Argentine subsidiaries , signed a definitive exploration and option agreement (the

“Agreement”) with OceanaGold Corporation (“OGC”) to explore the Company’s 100% owned, La

Curva gold project, located in Santa Cruz Province, Argentina (the “Project”).

OGC is a mid -tier, high-margin international gold producer with operations in New Zealand, the

Philippines and has recently commissioned the multimillion ounce Halie gold mine in the United

States. The La Curva Agreement grants OGC the option to acquire, in five stages, up to a 75%

interest in the Project and requires OGC to make a first year commitment of US $1.25 mil lion in

exploration expenditures, complete 3,000 metres of drilling, and make a US$100,000 option payment

to Mirasol on signing the Agreement (the “First Year Commitment”).

La Curva is a 36,100 ha exploration- stage gold project located at low elevation in an area with

favorable infrastructure. Mirasol’s exploration at the Project has outlined three gold prospects at Cerro

Chato, Loma Arthur and SouthWest , situated along the six km long “La Castora” gold trend, which

represent compelling drill targets for high grade, low sulphidation epithermal gold and silver

mineralization. A series of additional gold and silver prospects in the Curva West area warrant further

exploration to define additional drill targets. (Learn more about the La Curva Drill targets).

The Agreement provides five sequential earn-in stages that, if fully exercised, permit OGC to earn up

to 75% of the Project.

Initial Earn-in: Following completion of the First Year Commitment, OGC can elect to proceed with

the balance of the Initial Earn-in obligations over four years from the date of the Agreement to earn a

51% interest in the Project by : (i) funding cumulative exploration expenditures totaling US$7 million

(inclusive of the First Year Commitment); and (ii) making staged cash payments to Mirasol totaling

US$1.5 million (inclusive of the First Year Commitment). Mirasol will serve as operator for exploration

for the first year in return for a 5% management fee. OGC may elect to serve as operator thereafter or

request that Mirasol continue as operator.

PEA Milestone: Following completion of the Initial Earn- in, OGC may elect to increase its interest to

60% of the Project by funding and delivering, within two years of the Initial Earn-In date, a preliminary

economic assessment, in accordance with NI 43- 101, that outlines an inferred resource of not less

than: (i) 500,000 ounces of gold equivalent at a cut-off grade of 0.25 g/t gold equivalent for an open pit

resource; or (ii) 500,000 ounc es of gold equivalent at a cut -off grade of 1.5 g/t gold equivalent for an

underground resource.

Feasibility Milestone: Following completion of the PEA Milestone, OGC may elect to increase its

interest to 65% of the Proj ect by funding and delivering, withi n two years of the PEA Milestone, a

positive feasibility study on the Project in accordance with NI 43-101.

Decision to Mine: Concurrently with the time period to complete the Feasibility Milestone, OGC may

elect to increase its interest to 70% of the Project by funding and delivering the following: (i) a

910 - 850 West Hastings Street, Vancouver, B.C. V6C 1E1 Canada

Tel: 604.602.9989 Fax: 604.609.9946 E-mail: [email protected]

www.mirasolresources.com

24430207.1

feasibility study suitable to be submitted to a recognized financial institution as a basis for lending

funds for the development of a mine; and (ii) approval of a decision to mine by the OGC board.

Production Financing: At the Decision to Mine stage, Mirasol can elect to either: (i) retain 30% of the

Project by funding its proportionate share of further development costs; or (ii) exercise its right to

require that OGC fund its proportionate share of the development costs (to be repaid from 50% of

Mirasol’s net cash flow from the Project) in exchange for Mirasol reducing its interest in the P roject to

25%, and thereby increasing OGC’s interest to 75%.

OGC has the right to extend one of the time periods to complete either the PEA Milestone or the

Feasibility Milestone by making cash payments to Mirasol of US$250,000, or US$500,000

respectively. In the event that OGC fail s to complete the PEA Milestone, its 51% interest shall revert

to a 49% and Mirasol shall assume management control of the Project. In the event that OGC fails to

complete the Feasibility Milestone, then its 60% interest shall revert to a 51% in the Project. The

Agreement includes a dilution provisi on whereby if either parties project equity position should fall

below 10%, then their interest shall convert into a 2% net smelter return royalty.

Mirasol and OGC are currently optimizing the drill program design for the initial drill test of the La

Castora Trend gold prospects. Drill permitting for the Project is well advanced and is anticipated to be

completed within the current quarter. Mirasol and OGC are monitoring the weather conditions to

determine if the dril l program will be initiated during the southern hemisphere winter months , or to

defer the start of drilling until the September 2017 spring period.

Mirasol is a mineral exploration and project generation company focused on the discovery of gold,

silver and copper prospects in the Americas. Strategic joint ventures with producers have enabled

Mirasol to advance its priority projects, focused in high- potential regions in Chile and Argentina.

Mirasol employs an integrated generative and on- ground explor ation approach combining leading

edge technologies and experienced exploration geoscientists to maximize the potential for

discoveries. Mirasol is in a strong financial position and has a significant portfolio of exploration

projects located in Latin America.

Stephen Nano, President and CEO of Mirasol, has approved the technical content of this news

release and is a Qualified Person under NI 43 -101.

For further information, contact:

Stephen Nano

President and CEO

or

John Toporowski

Manager of Investor Relations

Tel: +1 (604) 602-9989:

Email: [email protected]

Website: www.mirasolresources.com

Forward Looking Statements: The information in this news release contains forward looking statements that are

subject to a number of known and unknown risks, uncertainties and other factors that may cause actual results

to differ materially from those anti cipated in our f orward looking statements. Factors that could cause such

differences include: changes in world commodity markets, equity markets, costs and supply of materials relevant

to the mining industry, change in government and changes to regulations affecting the m ining industry. Forward-

looking statements in this release include statements regarding future exploration programs, operation plans,

910 - 850 West Hastings Street, Vancouver, B.C. V6C 1E1 Canada

Tel: 604.602.9989 Fax: 604.609.9946 E-mail: [email protected]

www.mirasolresources.com

24430207.1

geological interpretations, mineral tenure issues and mineral recovery processes. Although we believe the

expectations ref lected in our forward looking statements are reasonable, results may vary, and we cannot

guarantee future results, levels of activity, performance or achievements. Mirasol disclaims any obligations to

update or revise any forward looking statements whether as a result of new information, future events or

otherwise, except as may be required by applicable law.

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