Three‐Dimensional Electrical Resistivity Characterization of Mountain Pass, California and Surrounding Region

Abstract

Rare earth elements (REE) have atomic numbers ranging from 57 to 71, commonly referred to as the "lanthanides." These elements have unusual chemical and physical properties that make them useful for a variety of technologies ranging from batteries to magnets to glass polishes (Gosen et al., 2017). REEs are common in crustal abundance, however large concentrations of REE are not, making it important to identify resources as global demand increases (Gosen et al., 2017). Large REE deposits are often associated with carbonatite-alkaline complexes where mineralization occurs during intrusion and associated hydrothermal activity (Wang et al., 2020). Carbonitic melts form from small amounts of partially melted primitive mantle rich in REEs. These melts typically intrude the crustal column in rift or subduction settings commonly forming ring shaped zones of mineralization, where secondary hydrothermal activity can increase REE concentration (Wang et al., 2020).

Magnetotelluric Evidence for Lithospheric Alteration Beneath the Wuyi‐Yunkai Orogen: Implications for Thermal Structure of South China

“…However, the values of | β| increase at periods greater than 1 s, implying the presence of a complex 3‐D geoelectric structure in the middle‐lower crust. The orientation of the principal axis of the phase tensor in the WSSZ is NW–SE, which is either parallel or perpendicular to the geological strike due to the 90° ambiguity in the polarization of electromagnetic fields (Booker, 2014; Peacock et al., 2021). Overall, the phase tensor results show significant 3‐D structural features along the MT profile, and thus, the 3‐D inversion and interpretation of the MT data from this profile are essential for realistically imaging the subsurface electrical structure.…”

Deep Structure of Epithermal Deposits in Youxi Area: Insights from CSAMT and Dual-Frequency IP Data

“…Electromagnetic methods have been extensively employed in the exploration of ore deposits, including rare earth mineral exploration [21], as well as the exploration of coppernickel deposits [22], lead-zinc ore deposits [23], and gold deposits [24]. These research endeavors have effectively demonstrated the potential applications of electromagnetic techniques in mineral exploration.…”