Daniel Feucht's research while affiliated with United States Geological Survey and other places

... The upper crust in the oreforming zone serves as a relatively ideal cap rock, facilitating the storage of deep-seated aqueous fluids [11]. High-conductivity anomaly C1 may also be attributed to deep conductors with high skew, as due either to anisotropy [30] or solid-state conductors [31]. The major faults in the study area, including the Tancheng-Lujiang Fault, the Yangxin-Changzhou Fault, and the Xiangfan-Guangji Fault, are reflected in the resistivity model as electrical gradient zones connected to high-conductivity features in the middle and lower crust of the mineralized belt. ...

... During the hydrate formation in brine, the salinity increases due to the salt-removing effect, further enhancing the inhibitory effect on hydrate formation (Husebø et al., 2009). In hydrate exploration and mining activities, resistivity logging is most commonly used for determining hydrate saturation (Chen et al., 2022;Feucht et al., 2019;Liu et al., 2017). The resistivity of sediment mainly depends on the conductive ions' mobility in the pore channel and the mineralization degree of pore water (Chidiac and Shafikhani, 2020;Zhang et al., 2021). ...

... The 3D density model was inverted using a 1 × 1 km grid from the gravity Bouguer anomaly (GSC, 2021). The Magneto-Telluric (MT) data obtained from Metal Earth project was inverted to generate the 3D resistivity model with cell sizes ranging from 100 to 1000 m (see Haugaard et al., 2021;Kordy et al., 2015aKordy et al., , 2015bRoots et al., 2022;Wannamaker et al., 2017 for details on the inversion methodology with HexMT). The vertical grid of the 3D density, susceptibility, and resistivity models were exponentially increased toward the deeper portion of the model. ...

... Seismic studies have revealed anomalously hot mantle (e.g., MacCarthy et al., 2014), but their resolution at crustal depths is insufficient to infer extensional processes. A two-dimensional magnetotelluric (MT) study showed a laterally continuous lower-crustal conductor that is interpreted as a signature of extension beyond the axis of the Rio Grande rift proper (Feucht et al., 2017), although off-line insights are limited. ...

... In the last decade, the magnetotelluric (MT) method has emerged as a particularly useful tool for investigating such large-scale lithospheric features. Continental-scale studies across Australia (AusLAMP, Robertson et al., 2016), China (Sinoprobe, Dong et al., 2016), the USA (USArray, Bedrosian & Feucht, 2014;Kelbert et al., 2019), and Canada (Lithoprobe, Jones et al., 2014;Metal Earth, Hill et al., 2021;Roots et al., 2022) have proven crucial in elucidating the lithospheric architecture of the respective continents and geodynamic processes by which they formed and evolved. MT data is sensitive to subsurface resistivity (or its inverse, conductivity), which depends on a variety of factors. ...