MONUMENTAL MINERALS FINALIZES FOLLOW-UP EXPLORATION PLAN AT THE LAGUNA BLANCA PROJECT, LITHIUM TRIANGLE, CHILE

News Release – Vancouver, British Columbia – June 29, 2022: Monumental Minerals Corp. (“Monumental” or the “Company”) (TSX-V: MNRL; FSE: BE5; OTC: MNMRF) is pleased to announce plans for a follow-up exploration work program at the Laguna Blanca lithium (Li) brine and cesium (Cs) sediment project (the “Project”), located within the Lithium Triangle, northern Chile.

The Laguna Blanca Project is within the eastern Andean Geomorphic Belt of Chile’s Central Andean Altiplano and is located 120 km from the Salar de Atacama, the largest producing salar in the world. The felsic volcanic rocks of the Central Andean Altiplano are enriched in Li and Cs. Seasonal rain and snow melt leaches and transports Li, Cs, Ca, Na, Mg, K, and B from rock units into the enclosed Laguna Blanca salar. With no outlets, evaporation concentrates these elements within mineral-rich salar brines.

On June 18 and 19, 2022, Monumental hosted a site visit to the Laguna Blanca Project (Photo 1) for the Company’s Chilean team, in order to formulate an exploration work program. The objective of the program is to develop drilling targets by confirming existing areas of interest and by establishing additional targets within the concessions that fall under the Company’s option agreement with Lithium Chile Inc.

Photo 1. Monumental Minerals’ consultants on a site visit at the Laguna Blanca Project, Chile.

The Company’s Chilean team includes:

  • Caracle Creek Chile SpA: Monumental’s local Chilean exploration consulting and project management group.
  • Atacama Water SpA: Hydrogeological site characterization and brine resource evaluation.
  • Satelite SpA: Specialized in sustainable advancement of the Project including social, community, and environmental terms to build solid links and relationships with our stakeholders.

Dr. Jamil Sader, CEO and Director of Monumental, comments:

“We look forward to advancing our Laguna Blanca Project utilizing TEM geophysics and near-surface brine and sediment geochemistry. The results from this exploration work program will be quickly translated into the delineation of multiple drilling targets. Monumental’s high-performance Chilean team have been instrumental in the planning of our field work program, and they are a key part of our success in Chile to date and will be in the future.”

The work program is set to commence immediately with the objective to collect additional near-surface brine and sediment samples for geochemical analysis. The sample locations will be strategically selected to build on the previous sampling conducted by Lithium Chile Inc., within the 9 square km highly prospective area (see Monumental Minerals press release dated June 7, 2022). Samples will also be collected based on assessments of the basin and on a transient electromagnetic (TEM) geophysical survey previously carried out by Lithium Chile Inc. in 2019 (Figure 1). Conductive anomalies from that survey occur from less than 100 to 150 m below ground surface and have strike lengths of several kilometres (Figure 1).

Figure 1.  LEFT: Transient Electromagnetic (TEM) survey cross-section results (1D Inversion Models) from a 2019 survey completed by Lithium Chile Inc. From top to Bottom, lines #1, #2 and #3. RIGHT: Location of surface traces (pink) of the TEM survey lines. The hot colours (pink, red, orange, yellow) in the cross sections indicate a conductive anomaly at depths of less than 100 m from ground surface and suggest a strike length of several kilometres with thickness of more than 400 metres.

Transient Electromagnetics (TEM), also referred to as Time Domain EM (TDEM), is an electromagnetic geophysical method which utilizes a controlled inductive source to generate diffusion and/or eddy currents in the subsurface whose secondary magnetic field response is then measured. The electromagnetic responses from TEM surveys and subsequent modelling are highly effective in delineating the locality and thickness of brine aquifers. Brine fluids contain high concentrations of elements including lithium, cesium, and boron, which conduct electrical currents more efficiently than fresh water or silicate rocks. Thus, highly conductive zones in the subsurface, in conjunction with high lithium contents from surface sampling, present compelling targets for drilling and follow-up exploration.

Monumental Minerals Corp. has granted incentive stock options to certain of its directors and consultants to purchase up to an aggregate 35,000 common shares of the Company at a price of 45 cents per common share for a period of three years, with the options vesting immediately.

Methodology and QA/QC

At Laguna Blanca, Transient Electromagnetic (TEM) surveys were conducted in 2019 using a 200-metre coincident square moving loop configuration with contiguous (back-back) moving loops, acquiring the vertical component of dB/dt data at frequencies of 1 and 4Hz, using a Zonge, GDP-32II 16-bit receiver, and Zonge, ZT-30 transmitter. A series of 3 northeast-southwest oriented lines comprising 67 TEM stations over 13 line-km were completed. 1D smooth-model inversion (STEMINV v3.00, Scott MacInes, Zonge) was used for converting TEM measurements into resistivity versus depth information within Geosoft Oasis Montaj software.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by Kristopher J. Raffle, P.Geo. (BC) Principal and Consultant of APEX Geoscience Ltd. of Edmonton, AB, a Director of the Company and a “Qualified Person” as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects.  Mr. Raffle verified the data disclosed which includes a review of the sampling, analytical and test data underlying the information and opinions contained therein. Monumental cautions that past results or discoveries on proximate land are not necessarily indicative of the results that may be achieved on the Laguna Blanca Project.

About Monumental Minerals Corp.

Monumental Minerals Corp. is a mineral exploration company focused on the acquisition, exploration, and development of mineral resource properties in the critical and electric metals sector. The Company’s flagship asset is the Jemi HREE project located in Coahuila, Mexico near the Texas, USA border which the Company has an option to acquire 100% of the 3,650-hectare project. The Company has an option to acquire a 75% interest and title to the Laguna Blanca project located in Chile.

On behalf of the Board of Directors,

/s/ “Jamil Sader”

Jamil Sader, Chief Executive Officer and Director

Contact Information:

Email: [email protected]

Or

Email: [email protected]

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 news release.

Forward Looking Information

This news release contains “forward‐looking information or statements” within the meaning of applicable securities laws, which may include, without limitation, the potential plans for the Company’s projects, the timing, completion and expected outcomes of the next phase of exploration work on the Laguna Project, other statements relating to the technical, financial and business prospects of the Company, its projects and other matters. All statements in this news release, other than statements of historical facts, that address events or developments that the Company expects to occur, are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in the forward-looking statements. Such statements are based on numerous assumptions regarding present and future business strategies and the environment in which the Company will operate in the future, including the price of metals, the ability to achieve its goals, that general business and economic conditions will not change in a material adverse manner and that financing will be available if and when needed and on reasonable terms. Such forward-looking information reflects the Company’s views with respect to future events and is subject to risks, uncertainties and assumptions, including the risks and uncertainties relating to the interpretation of exploration results, risks related to the inherent uncertainty of exploration and cost estimates and the potential for unexpected costs and expenses and those other risks filed under the Company’s profile on SEDAR at www.sedar.com. While such estimates and assumptions are considered reasonable by the management of the Company, they are inherently subject to significant business, economic, competitive and regulatory uncertainties and risks. Factors that could cause actual results to differ materially from those in forward looking statements include, but are not limited to, continued availability of capital and financing and general economic, market or business conditions, failure to secure personnel and equipment for work programs, adverse weather and climate conditions, risks relating to unanticipated operational difficulties (including failure of equipment or processes to operate in accordance with specifications or expectations, cost escalation, unavailability of materials and equipment, government action or delays in the receipt of government approvals, industrial disturbances or other job action, and unanticipated events related to health, safety and environmental matters), risks relating to inaccurate geological assumptions, failure to maintain all necessary government permits, approvals and authorizations, failure to obtain surface access agreements or understandings from local communities, land owners or Indigenous groups, fluctuation in exchange rates, the impact of Covid-19 or other viruses and diseases on the Company’s ability to operate, an inability to predict and counteract the effects of COVID-19 on the business of the Company, including but not limited to, the effects of COVID-19 on the price of commodities, capital market conditions, restriction on labour and international travel and supply chains, decrease in the price of rare earth elements, lithium, cesium and other metals, loss of key employees, consultants, or directors, failure to maintain community acceptance (including from the Indigenous communities), increase in costs, litigation, and failure of counterparties to perform their contractual obligations. The Company does not undertake to update forward‐looking statements or forward‐looking information, except as required by law.

MONUMENTAL MINERALS CORP. SAMPLES 0.54% TOTAL RARE EARTH OXIDE AND 0.26% HEAVY RARE EARTH OXIDE CONFIRMING SIGNIFICANT RARE EARTH GRADES AT JEMI HEAVY RARE EARTH ELEMENT PROJECT, MEXICO

News Release – Vancouver, British Columbia – June 15, 2022: Monumental Minerals Corp. (“Monumental” or the “Company”) (TSX-V: MNRL; FSE: BE5; OTC: MNMRF) is pleased to announce the results of 21 select rock grab samples collected from its Jemi Heavy Rare Earth Element (HREE) Project, located in Coahuila, Mexico, about 40 km south of the Texas, USA border.

The Jemi rock samples have returned some of the highest HREE grades sampled to date and serve to confirm and reinforce the Company’s understanding of mineralization controls at Jemi. Significantly, the rock sample results released today also establish the HREE potential of multiple visually distinct lithologies, which opens the potential for the discovery of previously unrecognized new zones of HREE mineralization.

Of the 21 select rock grab samples, a total of seven returned values greater than 0.15% total rare earth oxide (TREO[1]), including three samples that returned values greater than 0.25% TREO1 and up to 0.54% TREO1 (22KRP018). Samples with the highest TREO1 values also returned the highest heavy rare earth oxide (HREO2) values – 0.26% and 0.16% for samples 22KRP018 (Veladora North area) and 22KRP004 (JEMI Dyke area), respectively (Table 1, Fig. 1). The assay results confirm that samples with the highest REE content are those rocks that are classified as peralkaline (sodium plus potassium concentrations are greater than aluminum concentrations). In HREE mineral systems, rocks must be peralkaline in order for the crystallization of HREE bearing silicate minerals like eudialyte to occur. Peralkaline rocks are defined along the 8 km strike length determined by airborne radiometrics (see Monumental Minerals Press Release May 3, 2022). In addition, a single rock grab sample collected in the eastern claim area returned values of 13.5% zinc and 6.82% lead (22KRP009, Table 1, Fig. 1) and is classified as carbonate replacement-style mineralization.

Table 1. Rare earth element and base metal assay results from select samples collected during the April 2022 Jemi site visit.

Jamil Sader, Monumental’s CEO and Director comments:

 “We are excited by the significance of the rock grab sample results released today, in that they confirm the presence of economically significant HREE values and the right rock type. They also confirm the highest HREE values returned to date at Jemi, and establish the potential for multiple underexplored new zones of mineralization not previously recognized. We look forward to commencing our expanded program of geologic mapping, surface geochemical sampling and ground radiometric geophysical surveying in the coming weeks to define targets for diamond drill testing as early as late Q3.”

Heavy rare earth target areas within the Jemi Project are indicated by positive airborne radiometrics that define two parallel 8 km arcuate anomalies occurring along the southwest margin of the Sierra La Vasca intrusive complex. At Jemi, radiometric anomalies are spatially associated with HREE mineral occurrences. These occurrences are comprised of eudialyte bands within alkaline dykes, veins, and disseminations that have been emplaced into host carbonate rocks at both the Project’s Veladora North and JEMI Dyke areas.

Figure 1. Location of samples collected during the April 2022 Jemi site visit, showing values of the HREE dysprosium and rock types.

The Jemi Project hosts numerous REE occurrences containing potentially economic concentrations of the high value magnetic REEs including the HREEs dysprosium (Dy) and terbium (Tb), and the light rare earth elements (LREE) neodymium (Nd), praseodymium (Pr). The Project also contains associated tantalum (Ta), niobium (Nb), and zirconium (Zr). Jemi sits within the North American Alkaline Igneous Belt, an under explored north-south trend over 3000 km long of alkaline igneous rocks and carbonatites that are host to numerous REE, gold and other critical element deposits.

The REE mineralization discovered to date at Jemi exhibits characteristics and mineralogy consistent with peralkaline intrusion related deposits, which represent an important potentially economic style for the highest value HREE.  Deposits of this type are being explored and prepared for development in Australia, Europe, and North America.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by Kristopher J. Raffle, P.Geo. (BC) Principal and Consultant of APEX Geoscience Ltd. of Edmonton, AB, a Director of the Company and a “Qualified Person” as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects.  Mr. Raffle verified the data disclosed which includes a review of the sampling, analytical and test data underlying the information and opinions contained therein. 

The analytical work reported on herein was performed by ALS Canada Ltd. (ALS) at Hermosillo, Mexico (sample preparation) and Vancouver, B.C. (ICP-MS fusion). ALS is an ISO-IEC 17025:2017 and ISO 9001:2015 accredited geoanalytical laboratory and is independent of Monumental Minerals and the QP. Rock samples were subject to crushing at a minimum of 70% passing 2 mm, followed by pulverizing of a 250-gram split to 85% passing 75 microns. A 0.1-gram sample pulp was then subject to multi-element ICP-MS analysis via lithium-borate fusion to determine individual REE content (ME-MS81). Monumental Minerals quality assurance/quality control (QA/QC) program for field rock samples includes the insertion of certified reference standards into the sample sequence to confirm the accuracy of the reported results. Monumental Minerals detected no significant QA/QC issues during review of the data, and is not aware of any sampling, or other factors that could materially affect the accuracy of the results.

About Monumental Minerals Corp.

Monumental Minerals Corp. is a mineral exploration company focused on the acquisition, exploration, and development of mineral resource properties in the critical and electric metals sector. The Company’s flagship asset is the Jemi HREE project located in Coahuila, Mexico near the Texas, USA border which the Company has an option to acquire 100% of the 3,650-hectare project. The Company has an option to acquire a 75% interest and title to the Laguna cesium-lithium brine project located in Chile. The Company has an option to acquire a 100% interest and title to the Weyman property located in the Kamloops and Nicola Mining Divisions and in the Thompson Nicola Regional District, British Columbia.

On behalf of the Board of Directors,

/s/ “Jamil Sader”

Jamil Sader, Chief Executive Officer and Director

Contact Information:

Email: [email protected]

Or

Email: [email protected]

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 news release.

Forward Looking Information

This news release contains “forward‐looking information or statements” within the meaning of applicable securities laws, which may include, without limitation, the potential plans for the Company’s projects including an expanded program of geological mapping, surface geochemical sampling and ground radiometric geophysical surveying to define targets for drill testing on the Jemi project and the expected timing and completion of these work programs, other statements relating to the technical, financial and business prospects of the Company, its projects and other matters. All statements in this news release, other than statements of historical facts, that address events or developments that the Company expects to occur, are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in the forward-looking statements. Such statements are based on numerous assumptions regarding present and future business strategies and the environment in which the Company will operate in the future, including the price of metals, the ability to achieve its goals, that general business and economic conditions will not change in a material adverse manner and that financing will be available if and when needed and on reasonable terms. Such forward-looking information reflects the Company’s views with respect to future events and is subject to risks, uncertainties and assumptions, including the risks and uncertainties relating to the interpretation of exploration results, risks related to the inherent uncertainty of exploration and cost estimates and the potential for unexpected costs and expenses and those other risks filed under the Company’s profile on SEDAR at www.sedar.com. While such estimates and assumptions are considered reasonable by the management of the Company, they are inherently subject to significant business, economic, competitive and regulatory uncertainties and risks. Factors that could cause actual results to differ materially from those in forward looking statements include, but are not limited to, continued availability of capital and financing and general economic, market or business conditions, failure to secure personnel and equipment for work programs, adverse weather and climate conditions, risks relating to unanticipated operational difficulties (including failure of equipment or processes to operate in accordance with specifications or expectations, cost escalation, unavailability of materials and equipment, government action or delays in the receipt of government approvals, industrial disturbances or other job action, and unanticipated events related to health, safety and environmental matters), risks relating to inaccurate geological assumptions, failure to maintain all necessary government permits, approvals and authorizations, fluctuation in exchange rates, the impact of Covid-19 or other viruses and diseases on the Company’s ability to operate, an inability to predict and counteract the effects of COVID-19 on the business of the Company, including but not limited to, the effects of COVID-19 on the price of commodities, capital market conditions, restriction on labour and international travel and supply chains, decrease in the price of rare earth elements, lithium, cesium and other metals, loss of key employees, consultants, or directors, failure to maintain community acceptance, increase in costs, litigation, and failure of counterparties to perform their contractual obligations. The Company does not undertake to update forward‐looking statements or forward‐looking information, except as required by law.

[1] Total Rare Earth Oxides (TREO) includes: La2O3, Ce2O3, Pr2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3, Y2O3.

2 Heavy Rare Earth Oxides (HREO) includes: Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3, Y2O3.

MONUMENTAL MINERALS SURFACE SAMPLING RETURNS 1160 PPM LITHIUM AND DEFINES A 9 KM SQUARE AREA OF HIGH LITHUM AND CESIUM PROSPECTIVITY AT THE LAGUNA BLANCA PROJECT, LITHIUM TRIANGLE, CHILE

News Release – Vancouver, British Columbia – June 7, 2022: Monumental Minerals Corp. (“Monumental” or the “Company”) (TSX-V: MNRL; FSE: BE5; OTCQB: MNMRF) is pleased to announce the results from confirmation surface grab samples from the Laguna Blanca lithium brine and cesium sediment Project (“Laguna”), located within the Lithium Triangle in Chile.

During a Monumental site visit to Laguna Blanca in early April 2022 (see Monumental Minerals Press Release dated April 10, 2022), 4 surface grab sediment samples were collected close to the southwestern edge of the salar brine pool (Fig. 1).

Figure 1. Surface sediment grab samples collected by Monumental in April 2022 demonstrate similar concentrations to proximal samples collected previously by Lithium Chile. The 9 km square lithium anomaly is defined by the gridded lithium point sample data (RGB map image layer).

The analytical results of the sediment samples returned values of 1160 ppm lithium, and 175 ppm cesium. These values are very similar to proximal samples collected previously by Lithium Chile. The similarity indicates consistency in lithium and cesium concentrations year-over-year and provides confidence in a 9 km square highly prospective area within the claims that are under the Option Agreement with Lithium Chile (Fig. 1). 

Dr. Jamil Sader, CEO and Director comments:

“The similarity in concentrations of lithium and cesium in our grab surface sediment samples, and previous samples collected by our partner, Lithium Chile gives us confidence in a prospective footprint of 9 km square for both sediment and brine. Our plans going forward will be to conduct more detailed surface and subsurface testing to further delineate this prospective area.”    

The Laguna Blanca Project is within the eastern Andean Geomorphic Belt of Chile’s Central Andean Altiplano and is located 120 km from the Salar de Atacama, the largest producing salar in the world. The felsic volcanic rocks of the Central Andean Altiplano are enriched in Li and Cs. Seasonal rain and snow melt leaches and transports Li, Cs, Ca, Na, Mg, K, and B into the enclosed Laguna Blanca salar. With no outlets, evaporation concentrates these elements within the salar brines.

Monumental Minerals Corp. has granted incentive stock options to certain of its directors and consultants to purchase up to an aggregate 80,000 common shares of the Company at a price of 45 cents per common share for a period of three years, with the options vesting immediately.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by Kristopher J. Raffle, P.Geo. (BC) Principal and Consultant of APEX Geoscience Ltd. of Edmonton, AB, a Director of the Company and a “Qualified Person” as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects.  Mr. Raffle verified the data disclosed which includes a review of the sampling, analytical and test data underlying the information and opinions contained therein. 

Sediment samples collected by Monumental’s management were submitted to Bureau Veritas (BV), Vancouver, BC. BV is an ISO-IEC 17025 and ISO 9001 accredited geoanalytical laboratory and is independent of Monumental and the QP. A 250-gram sample pulp was pulverized to 85% passing 200 mesh, and 0.25 grams subject to multi-acid (nitric-perchloric-hydrofluoric) digestion, followed by 59-element inductively coupled plasma emission/mass spectrometry (ICP-ES/MS) analysis. For the verification samples the QP has relied on the internal quality assurance/quality control (QA/QC) measure of BV which includes the insertion of standard, blank and duplicate samples into the sample stream to confirm the accuracy of the reported results. The QP detected no significant QA/QC issues during review of the data, and is not aware of any sampling, or other factors that could materially affect the accuracy of the results.

About Monumental Minerals Corp.

Monumental Minerals Corp. is a mineral exploration company focused on the acquisition, exploration, and development of mineral resource properties in the critical and electric metals sector. The Company’s flagship asset is the Jemi HREE project located in Coahuila, Mexico near the Texas, USA border which the Company has an option to acquire 100% of the 3,650-hectare project. The Company has an option to acquire a 75% interest and title to the Laguna project located in Chile.

On behalf of the Board of Directors,

/s/ “Jamil Sader”

Jamil Sader, Chief Executive Officer and Director

Contact Information:

Email: [email protected]

Or

Email: [email protected]

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 news release.

Forward Looking Information

This news release contains “forward‐looking information or statements” within the meaning of applicable securities laws, which may include, without limitation, the potential plans for the Company’s projects, other statements relating to the technical, financial and business prospects of the Company, its projects and other matters. All statements in this news release, other than statements of historical facts, that address events or developments that the Company expects to occur, are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in the forward-looking statements. Such statements are based on numerous assumptions regarding present and future business strategies and the environment in which the Company will operate in the future, including the price of metals, the ability to achieve its goals, that general business and economic conditions will not change in a material adverse manner and that financing will be available if and when needed and on reasonable terms. Such forward-looking information reflects the Company’s views with respect to future events and is subject to risks, uncertainties and assumptions, including the risks and uncertainties relating to the interpretation of exploration results, risks related to the inherent uncertainty of exploration and cost estimates and the potential for unexpected costs and expenses and those other risks filed under the Company’s profile on SEDAR at www.sedar.com. While such estimates and assumptions are considered reasonable by the management of the Company, they are inherently subject to significant business, economic, competitive and regulatory uncertainties and risks. Factors that could cause actual results to differ materially from those in forward looking statements include, but are not limited to, continued availability of capital and financing and general economic, market or business conditions, failure to secure personnel and equipment for work programs, adverse weather and climate conditions, risks relating to unanticipated operational difficulties (including failure of equipment or processes to operate in accordance with specifications or expectations, cost escalation, unavailability of materials and equipment, government action or delays in the receipt of government approvals, industrial disturbances or other job action, and unanticipated events related to health, safety and environmental matters), risks relating to inaccurate geological assumptions, failure to maintain all necessary government permits, approvals and authorizations, failure to obtain surface access agreements or understandings from local communities, land owners or Indigenous groups, fluctuation in exchange rates, the impact of Covid-19 or other viruses and diseases on the Company’s ability to operate, an inability to predict and counteract the effects of COVID-19 on the business of the Company, including but not limited to, the effects of COVID-19 on the price of commodities, capital market conditions, restriction on labour and international travel and supply chains, decrease in the price of rare earth elements, lithium, cesium and other metals, loss of key employees, consultants, or directors, failure to maintain community acceptance (including from the Indigenous communities), increase in costs, litigation, and failure of counterparties to perform their contractual obligations. The Company does not undertake to update forward‐looking statements or forward‐looking information, except as required by law.