Monumental Minerals Corp. Airborne Geophysical Survey Defines 8 Km Prospective Radiometric Trend and Conducts Site Visit at Jemi Heavy Rare Earth Project, Mexico
MONUMENTAL MINERALS CORP. AIRBORNE GEOPHYSICAL SURVEY DEFINES
8 KM PROSPECTIVE RADIOMETRIC TREND AND CONDUCTS SITE VISIT AT
JEMI HEAVY RARE EARTH PROJECT, MEXICO
News Release - Vancouver, British Columbia – May 3 , 2022: Monumental Minerals Corp.
(“Monumental” or the “ Company”) (TSX -V: MNRL; FSE: BE5; OTCQB: MNMRF) is pleased to
announce the results of its recently completed 1,122 line-kilometre heli-borne magnetic, radiometric, and
very-low frequency electro -magnetic (VLF-EM) geophysical survey completed at the Jemi Heavy Rare
Earth (HREE) Project, located in Coahuila, Mexico, about 40 km south of the Texas, USA border . The
Company is also pleased to report on a site visit to the property, which was conducted on April 27-29, 2022.
The Jemi HREE Project airborne survey results confirm that a significantly larger area of the Jemi Project
is prospective for HREE mineralization than previously recognized, with a 10 -fold increase (from
approximately 1 km to 10 km of prospective strike length). Airborne radiometric results define two parallel
8 km arcuate anomalies that occur along the south and west margin of the Sierra La Vasca intrusion complex
(Figure 1).
Figure 1. Jemi HREE Project airborne radiometric anomalies.
The site visit was attended by members of Monumental’s management and technical team including Dr.
Jamil Sader, CEO and Director; Kristopher Raffle, P.Geo. QP and Director; and Dan Harmening Technical
Advisor; the Project vendors, and Sierra La Vasca researchers from Coahuila Universidad Autonoma (Fig.
2). The principal objective of the visit was to ground truth high priority radiometric anomalies to determine
the next steps toward rapid evaluation and prioritization of targets for diamond drill testing.
Figure 2. Jemi site visit attendees. From left to right: Jesus Hernandez (vendor), Antonio Rodriguez Vega
(UAdeC), Roberto Díaz Martinesz (UAdeC), Reynaldo Falcon (vendor), Dan Harmening (MNRL Technical
Advisor), Kristopher Raffle, P.Geo. (Director and QP), Dr. Jamil Sader (CEO and Director).
During the site visit, it was confirmed that the newly discovered airborne radiometric anomalies are
spatially associated with known HREE mineral occurrences. These occurrences are comprised of eudialyte
bands within alkaline dykes, veins, and disseminations in host carbonate rocks at both the Projec t’s
Veladora North and JEMI Dyke area s (Fig. 3 a,b,c). Eudialyte is a highly complex Na, Ca, Fe/Mn, Zr
silicate mineral that can contain up to 10% RE2O3 (enriched in HREEs), and 12% ZrO2. Rare earth element
bearing minerals (namely eudialyte)–but also other minerals associated with REE mineralization commonly
contain trace Th and U in concentrations greater than background. These rocks emit small amounts of
gamma rays and the variability between REE-bearing rocks and other rocks not of interest can be detected
with highly sensitive geophysical equipment . Radiometric surveys have been used extensively and
successfully as a primary direct detection exploration tool for REE deposits (e.g., McCafferty et al. 2014,
Shives 2015).
A B
C
Figure 3. Photo 3a is of a small eudialyte-rich peralkaline dyke or sill intruded into host limestone at the Veladora
North area. Photo 3b is of a larger 2 m peralkaline dyke or sill that also contains significant eudialyte. Photo 3c is
looking west from the JEMI area. The darker coloured rocks cropping out is a large (20 m) peralkaline dyke.
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 carbonati tes 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 pot entially economic style for the
highest value HREE. Deposits of this type are being explored and prepared for development in Australia,
Europe, and North America.
Jamil Sader, Monumental’s CEO and Director comments:
“Based on the geochemical characteri stics of known peralkaline intrusion-related HREE
mineralization at Jemi, Monumental was confident that airborne magnetic and radiometric
surveys would facilitate rapid target definition and evaluation. The coincidence of
mineralization and positive radiometrics shown via ground-truthing during the site visit
further demonstrates the 10-fold increase in prospective HREE strike length and validates
the Company’s cost-effective approach to advancing the Jemi HREE Project.”
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.
The 1,122 line-km Jemi HREE Project heli -borne geophysical survey was flown at 100 metres east -west
oriented flightlines, and 1 kilometre spaced north-south oriented tie lines at ±15 metre flight control flying
at a nominal 40 metre terrain clearance. The completed survey by Markham, Ontario based Terraquest Ltd.
utilized h igh resolution magnetics (Scintrex Ltd. cesium vapour) at 2 m (20 Hz sampling) , gamma ray
spectrometer (Radiation Solutions: RS -500 Advanced Digital Spectrometer ), digital matrix VLF -EM
sensors (proprietary Terraquest Ltd.).
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.
References
McCafferty, A.E., Stoeser, D.B. and Van Gosen, B.S., 2014. Geophysical interpretation of U, Th, and rare
earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island,
southeast Alaska. Interpretation, 2(4), pp.SJ47-SJ63.
Shives, R.B.K., 2015, November. Using gamma ray spec trometry to find rare metals. In Symposium on
Strategic and Critical Materials Proceedings, British Columbia Geological Survey Paper (Vol. 3, pp. 199-
209).
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 unde r 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 accorda nce 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 disease s 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.