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 – QNT Press Release

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VANCOUVER, BC, June 15, 2022 /CNW/ – Monumental Minerals Corp. (“Monumental” or the “Company“) (TSXV: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, Mexicoabout 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 (TREO¹), 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.

Jamil SaderMonumental’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.

Full story available on Benzinga.com

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