Monumental Minerals Corp. announced it has engaged Terraquest Ltd. to complete an airborne magnetic and radiometric geophysical survey over its Jemi heavy rare earth element (HREE) Project located in Coahuila, Mexico, about 40 km south of the Texas, USA border. The Jemi Project hosts numerous rare earth element (REE) occurrences containing potentially economic concentrations of the high value magnetic REEs including neodymium (Nd), praseodymium (Pr), dysprosium (Dy) and terbium (Tb) with 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 high-resolution helicopter-borne magnetic and radiometric survey will be flown at 100 m line spacing over an area of approximately 100 km2 for a total of 1,120 line-km. It will be centred on the 8 km diameter Sierra La Vasca intrusion complex that hosts the Jemi HREE mineral occurrences.

The Company expects the survey to commence rapidly (within 2-3 weeks' time) and take approximately 7 days to complete. Magnetic and radiometric data represent a cost-effective method to define areas of high REE potential within the Jemi Project. REE targets can be associated with anomalous magnetic highs or lows, and the anomalies can also be excellent indicators of structure.

Strong gamma-ray radiometric anomalies may be associated with potassium (K) enrichment as a product of hydrothermal alteration surrounding peralkaline intrusions. Anomalies of thorium (Th), and to a lesser degree uranium (U), are useful for direct detection of REE deposits, detection of other features associated with mineralization, and parental granites. Geophysical anomalies will be ground-truthed and prioritized for further exploration, which may include detailed geologic mapping, geochemical surveys, and ultimately trenching and/or diamond drill testing.