VICTORIA - Temas Resources Corp. ('Temas' or the 'Company') (CSE: TMAS) and their partner Erin Ventures Inc. (TSXV: EV) are pleased to report positive results of an Independent Technical Report and Preliminary Economic Assessment ('PEA') for the Piskanja boron project located in Serbia.

MINING

The geometry and depth of the mineralisation identified at Piskanja lends itself to an underground mining method. It is envisaged that mining will be by cut and fill method and that the key underground infrastructure will comprise: twin access declines from surface to the deposit: i) Main Haulage Decline ('MHD') from surface to the floor of Mineralized Zone 1 and ii) Main Ventilation Decline ('MVD') from surface to the roof of Mineralized Zone 3; an underground spiral ramp connecting MHD and MVD and enabling access to all levels; a shaft connecting MHD and MVD to serve as an ore pass and temporary stockpile (if needed); footwall drives located below seam horizons of Mineralized Zone 1, Mineralized Zone 2 and Mineralized Zone 3; level drives and ventilation connections between three footwall drives.

The PEA envisages a Run of Mine (ROM) average annual tonnage of 307,956 tonnes to produce some 261,821 tonnes of sale grade colemanite and 25,000 tonnes of boric acid for a period of 17 years.

Excavation is currently proposed by mechanical cutting using Continuous Miners ('CM'). The rationale of the application of mechanical cutting, as opposed to drill and blast operations, is the need to minimize ground vibrations which may affect the residential structures and cause annoyance to the residents of the nearby village, Korlace. Similarly, the application of any caving mining methods or any mining methods which could cause ground subsidence is, at present moment, excluded from further considerations.

Material mined by the CMs would be hauled by shuttles or battery haulers to the nearest ore pass/ore bin and fed to the panel conveyor at the main haulage horizon. The panel conveyor would then haul the mined material to the main ore pass/ore bunker. The main ore pass has two functions: i) to reduce the mined material tonnes to the Main Haulage Decline and feed it to the Main belt conveyor and ii) to serve as a temporary ore storage/stockpile. Once fed to the main belt conveyor, the material is conveyed to the surface and fed to the ore processing system.

In order to achieve an overall planned mining recovery of 75% and ensure the stability of excavated spaces, it will be necessary to apply solidifying material for backfill and further geotechnical assessment including an assessment of the geometry, rock strength, and backfill characteristics will be required.

PROCESSING

All ROM production is to be fed to the Colemanite Plant for colemanite production with the aim of upgrading mined materials to desired concentrate levels of B2O3. A constant product grade of 40% B2O3 and a tails grade of 7.5% B2O3 is planned.

The operating plan calls for the production of both colemanite concentrate and boric acid, the latter at a rate of 25 ktpa, and the former at a rate of approximately 250 ktpa. This production scenario has been modelled according to the process route shown in block form. It should be noted that further metallurgical test work is required to finalize the process flowsheet. However, the process flowsheet for B2O3 mineralized material beneficiation is well documented, shows that the process utilizes 'off the shelf' technology, and is in fact commonly deployed in Turkish boron mines.

According to available data from Turkey, the concentration of colemanite mineralization is carried out by crushing and grinding, washing and classification in the size fractions. For larger size fractions, colemanite concentrate is produced through attrition tumbling and hand sorting, while for finer size fractions (-6 mm), attrition scrubbing and classification are carried out. At Emet Mine in Turkey, a colemanite concentration plant with a capacity of 600,000 tons per year processes colemanite ore of 27% B2O3 to produce 300,000 tons of concentrate averaging 43% B2O3 using the above described method.

The production of boric acid is also a well-documented process with readily available technology used by several producers globally.

CAUTIONARY NOTE

The PEA summarized in this news release is considered preliminary in nature, contains numerous assumptions and includes Inferred Mineral Resources that are considered too speculative, geologically, to have the economic considerations applied to them that would enable them to be categorized as Mineral Reserves. There is no certainty that the results of the PEA will be realized. No Mineral Reserves have been estimated for Piskanja. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. Inferred Mineral Resources are that part of the Mineral Resource for which quantity and grade or quality are estimated on the basis of limited geologic evidence and sampling, which is sufficient to imply but not verify grade or quality continuity. Inferred Mineral Resources may not be converted to mineral reserves. It is reasonably expected, though not guaranteed, that the majority of Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration. Mineral Resources are captured within an optimized mine plan (within the constraints of a PEA) and meet the test of reasonable prospects for economic extraction.

The effective date of the PEA is June 24, 2022, and a technical report prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects ('NI 43-101') in support of the PEA will be filed on SEDAR within 45 days of this news release.

Contact:

Michael Dehn

Tel: +1 (604) 428-9480

Email: ir@temasresources.com

About Temas Resources

Temas Resources Corp. (CSE: TMAS) (OTCQB: TMASF) is focused on the advancement of mineral independence and processes by which mineral products (nickel, iron, copper, gold, ilmenite and other sulphide and oxide mineral ores and concentrates) are processed and recovered using sustainable hydrometallurgical technologies. The Company invests in and works to apply its green technologies across its mining portfolio to reduce the environmental impact and carbon footprint of metal extraction through advanced processing and patented leaching technologies. The Company is advancing Iron-Titanium-Vanadium projects in Quebec and soon expects to be active at its boron project in Serbia.

Pursuant to the Option Agreement, Temas Resources may earn a 50% interest in the Piskanja Project by (a) issuing to Erin Ventures 250,000 common shares (completed) and 250,000 Temas warrants (completed) (each exercisable to acquire a common share for a period of 48 months from issuance, at an exercise price equal to the market price of the common shares less the maximum allowable discount pursuant to stock exchange policies) within five business days after the effective date of the Option Agreement, and (b) incurring an aggregate of EUR10,500,000 in expenditures on the Piskanja Project. The Option Agreement may be terminated in certain circumstances, including by Erin Ventures if certain milestones are not met in accordance with specified timelines. Upon exercise of the option by Temas Resources, a joint venture will be formed and Erin Ventures and Temas Resources will become associated as joint venturers to further advance the Piskanja Project.

Cautionary Note Regarding Forward-Looking Statements

This news release contains forward-looking statements and forward-looking information (collectively, 'forward-looking statements') within the meaning of applicable Canadian and U.S. securities legislation. All statements, other than statements of historical fact, included herein including, without limitation, the results of the PEA, including the projected Capex, the estimated after-tax NPV and IRR, the estimated LOM and estimated concentrate grades, the potential production from and viability of Piskanja, the risks and opportunities outlined in the PEA, the potential tonnage, grades and content of deposits, the extent of mineral resource estimates, anticipated exploration program results from exploration activities, the discovery and delineation of mineral deposits/resources/reserves and the anticipated business plans and timing of future activities of the Company are forward-looking statements. Although the Company believes that such statements are reasonable, it can give no assurance that such expectations will prove to be correct. Forward-looking statements are typically identified by words such as: 'believes', 'expects', 'anticipates', 'intends', 'estimates', 'plans', 'may', 'should', 'would', 'will', 'potential', 'scheduled' or variations of such words and phrases and similar expressions, which, by their nature, refer to future events or results that may, could, would, might or will occur or be taken or achieved. In making the forward-looking statements in this news release, the Company has applied several material assumptions, including without limitation, that the Company will receive all necessary approvals required to develop Piskanja as outlined in the PEA, that the assumptions in the PEA are reasonably accurate, market fundamentals will result in sustained boron demand and prices, the receipt of any necessary permits, licenses and regulatory approvals in connection with the future development of Piskanja in a timely manner, the availability of financing on suitable terms for the development, construction and continued operation of the Company's projects and its ability to comply with environmental, health and safety laws.

Forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to differ materially from any future results, performance or achievements expressed or implied by the forward-looking information. Such risks and other factors include, among others, requirements for additional capital, operating and technical difficulties in connection with mineral exploration and development activities, actual results of exploration activities, including on the Piskanja project, the estimation or realization of mineral reserves and mineral resources, and there is no guarantee that such interests, will be certain, the timing and amount of estimated future production, the costs of production, capital expenditures, the costs and timing of the development of new deposits, requirements for additional capital, future prices of boron, changes in general economic conditions, changes in the financial markets and in the demand and market price for commodities, lack of investor interest in future financings, accidents, labour disputes and other risks of the mining industry, delays in obtaining governmental approvals (including of the TSX Venture Exchange), permits or financing or in the completion of development or construction activities, risks relating to epidemics or pandemics such as COVID-19, including the impact of COVID-19 on the Company's business, financial condition and results of operations, changes in laws, regulations and policies affecting mining operations, title disputes, the inability of the Company to obtain any necessary permits, consents, approvals or authorizations, the timing and possible outcome of any pending litigation, environmental issues and liabilities, and risks related to joint venture operations, and other risks and uncertainties disclosed in the company's continuous disclosure documents. All of the Company's Canadian public disclosure filings may be accessed via www.sedar.com and readers are urged to review these materials.

Cautionary Note to United States Investors

Temas Resource Corp. prepares its disclosure in accordance with the requirements of securities laws in effect in Canada, which differ from the requirements of U.S. securities laws. Terms relating to mineral resources in this news release are defined in accordance with NI 43-101 under the guidelines set out in CIM Definition Standards on Mineral Resources and Mineral Reserves, adopted by the Canadian Institute of Mining, Metallurgy and Petroleum Council on May 19, 2014, as amended ('CIM Standards'). The U.S. Securities and Exchange Commission (the 'SEC') has adopted amendments effective February 25, 2019 (the 'SEC Modernization Rules') to its disclosure rules to modernize the mineral property disclosure requirements for issuers whose securities are registered with the SEC under the U.S. Securities Exchange Act of 1934.

As a result of the adoption of the SEC Modernization Rules, the SEC will now recognize estimates of 'measured mineral resources', 'indicated mineral resources' and 'inferred mineral resources', which are defined in substantially similar terms to the corresponding CIM Standards. In addition, the SEC has amended its definitions of 'proven mineral reserves' and 'probable mineral reserves' to be substantially similar to the corresponding CIM Standards.

U.S. investors are cautioned that while the foregoing terms are 'substantially similar' to corresponding definitions under the CIM Standards, there are differences in the definitions under the SEC Modernization Rules and the CIM Standards. Accordingly, there is no assurance any mineral resources that Temas may report as 'measured mineral resources', 'indicated mineral resources' and 'inferred mineral resources' under NI 43-101 would be the same had Temas Resource Corp. prepared the resource estimates under the standards adopted under the SEC Modernization Rules.

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